Posts tagged "3W-International"

Georges Bouvier (project manager Europe), Karsten Schudt (CEO 3W International GmbH), Florian Schildein (marketing communication), Karl Schudt (CEO SkyPower GmbH)

In the past few weeks, 3W-International GmbH has gone through some turbulent times that brought about many new developments and changes. These tumultuous times culminated in a very successful Xponential 2018. Karsten Schudt, Managing Partner at 3W-International GmbH, has now commented on these developments.

In the weeks leading up to the Xponential, there had been many changes around 3W-International: the new production partner Sky Power, new products, new sales staff in Europe and North America, and also a changed presence on the Xponential. How did the market respond to these developments?

Karsten Schudt (KS): There have indeed been many changes in our environment, some intended, some unintended. Nevertheless, the trade show in Denver has shown that our customers understand why we had to implement these changes at our company. For us, the Xponential 2018 has been one of the most successful trade shows in our history. Naturally, some people approached us with questions about what was going on, however, we were able to reassure them that we are well positioned for the future and will continue to be a reliable partner for our customers. The market for propulsion units in general is currently on the move.

Are you referring to the filing for insolvency of your supplier 3W-Modellmotoren?

KS: No, not directly. Obviously, this incident prompted some adjustments on our side. However, even here it can be stated that this topic is not really a cause of concern for us as we are well positioned for the future with Sky Power and reliable partners. We do not wish to get involved in all the other speculations around 3W-Modellmotoren as we no longer maintain business relations with the company. But when we look at the market on a larger scale, the insolvency and sale of Hirth was also associated with many changes.

What changes are you referring to exactly?

KS: 3W-International, together with Sky Power, is the last German-owned engine manufacturer. Many new customers contact us precisely since they are looking for a reliable partner who focusses on long-term customer relations. Therefore we expanded the sales area before the trade show, with tangible effects. Nevertheless, our customers also expect technical further developments along the requirements of future markets. With our Engine Kit, which we presented at the trade show for the first time, we have demonstrated that we are more than just a mere engine supplier. The discussions we had with our customers at the trade fair have shown that we are recognized as a manufacturer of complete application-based propulsion units.

After the trade show is before the trade show – which new products will you showcase in Chicago next year?

KS: First and foremost, we have to concentrate on processing and implementing the Sky Power engine line as well as our Wankel rotary engine projects. Add to this more than 100 inquiries originating from the trade show, which have to be attended to. We are also very busy in the sales area. Moreover, we have set up a development plan for the coming 1 ½ years. This means that we will continue to work actively on the further development of each individual engine aiming to make these more efficient and even more reliable. Reducing fuel consumption is the crucial factor in this regard. In addition, our new development department has already come up with some ideas that will be implemented in the coming months. Consequently, we will certainly present new products at the next Xponential – and surely in a less turbulent environment leading up to the trade show.

About

With years of experience in designing, manufacturing and testing 2-stroke engines, 3W-International GmbH owns the newest generation of Heavy Fuel (HF) engines for the Unmanned Aerial System (UAS) industry.

The quality of 3W-International-engines stems from several factors. Technical expertise, long-term experience, tradition and state of the art production are the reasons for one of the highest quality levels in the industry. 3W-International is opposed to manufacturing abroad, so customers can be sure every engine is of German quality.

From R&D, prototyping, purchasing, manufacturing, calibration to in-time delivery, 3W-International guarantees constant and permanent quality control. Every manufacturing step is traceable. Employees are personally responsible for the fulfillment of 3W-International quality standards. Component suppliers and partners share these standards and guarantee these quality requirements.

On the sidelines of the Xponential 2018 in Denver, the German engine manufacturer signed a distribution agreement with IHATEK Ltd. Effective from June 1st, IHATEK Ltd. will market and distribute the products of 3W-International GmbH, as well as those of Sky Power GmbH, in Turkey.

“We are looking forward to this strategic partnership. The team of IHATEK Ltd.  is involved in many Turkish UAS projects and has gained a great amount of experience in the Turkish market over the past few years. This is why IHATEK Ltd.  is the ideal partner for us,” as Karsten Schudt, Managing Partner at 3W-International GmbH, announced on the occasion of the signing of the contract in the USA. Gökhan Celik, Managing Director of IHATEK Ltd. adds: “The engines manufactured by 3W-International have an excellent reputation. 3W-International built engines are particularly suited for demanding projects that focus on efficiency, low fuel consumption and high TBOs.”

In addition to 3W-International engines, IHATEK Ltd. will also distribute the engines of Sky Power which were presented at the Xponential for the first time. “We will be working together very closely, as this is the only way to ensure that we can offer Turkish customers the best propulsion solutions,” as Schudt continues to explain. For this reason, the German engine supplier will also actively support IHATEK Ltd. on site. The development of service structures in Turkey is planned for the 2nd half of the year. “This will put us in a position to offer our customers consultancy, sales, maintenance and service as a one-stop supplier,” as Celik points out.

About

With more than 35 years of experience in designing, manufacturing and testing 2-stroke engines, 3W-International GmbH has developed and patented the newest generation of Heavy Fuel (HF) engines for the Unmanned Aerial System (UAS) industry.

The quality of 3W-engines stems from several factors. Technical expertise, long-term experience, tradition and state of the art production are the reasons for one of the highest quality levels in the industry. 3W is opposed to manufacturing abroad, so customers can be sure every engine is of German quality.

From R&D, prototyping, purchasing, manufacturing, calibration to in-time delivery, 3W guarantees constant and permanent quality control. Every manufacturing step is traceable. Employees are personally responsible for the fulfilment of 3W quality standards. Component suppliers and partners share these standards and guarantee these quality requirements.

The 2-disc hybrid Wankel engine SP-480 SRE hybrid is being introduced for the first time to the professional public at Xponential 2018. 3W-International and Sky Power thus continue the tradition of presenting a new Wankel engine at the leading international trade fair. The SP-480 SRE involves a prototype.

Following the very positive resonance to the 3W-180 SRE, which 3W-International introduced in 2017, the company decided to further expand this engine portfolio. “The customer resonance surprised us at that time. We’ve launched a large number of projects since then with our customers. These projects often revolve purely around the generation of electricity. That’s why we’re now introducing the SP-480 SRE, which can also be used as a hybrid drive”, explains Karsten Schudt, managing director of 3W-International GmbH.

The engine was developed at performance partner Sky Power GmbH, which was also active in other forms in the background during the 3W-180 SRE hybrid’s development. The SP-180 SRE hybrid is a 480 ccm, 2-disc Wankel engine. At 6000 rpm, the engine achieves 70 hp with a basic weight of 14 kg. As with the single-disc engine, the housing and the trochoid are water cooled. An active oil circuit cools the piston. “Both cooling systems are very effective. They don’t need a pump, so they’re virtually maintenance free”, continues Schudt. The engine can be driven with both gasoline and with Heavy Fuel.

The engine is being introduced as a prototype at Xponential 2018 in Denver. “As in 2017, we want to test the market with the presentation of the new engine. We know about the performance level and also the customers for which it makes sense. Now it’s about supporting these assumptions through customer reactions. The customers have confidence in our 1-disc Wankel engine. The reactions show that. That’s why we’re assuming similar reactions for the SP-480 SRE hybrid”, according to Schudt.

3W-International and Sky Power are exhibiting together at booth 2210.

About

Sky Power GmbH is 3W-International GmbH’s performance partner. 3W-International is the leading manufacturer of 2-stroke internal combustion engines for UASs (unmanned aircraft systems). Sky Power’s function for us resembles that of a contract tuner for a car manufacturer. Customer adaptations, new developments, and the performance enhancement of 3W products are the goal of the partnership. Customer requests and new customer developments are also carried out.

Sky Power GmbH
Hollerstraße 12
61350 Bad Homburg
Germany

info@skypower.online
Phone: +49 (0) 6172 – 2654258
www.skypower.online

3W-International GmbH’s performance partner is introducing a novel engine construction kit in order to enable still more efficient and performance-optimized engines in future. Using this construction kit, propulsion units can be ideally tuned to the customer's desired performance parameters and application area.

“We’re seeing ever stronger demand for application-oriented solutions”, explains Karl Schudt, managing director of Sky Power GmbH. “That’s why we considered how we could best serve this demand, since each customer favours his own solution. In the past, UAS manufacturers were just interested in getting their flight systems into the air. That’s why propulsion units were often relegated to a subordinate role. This has changed permanently in recent years. Today, UASs have got to fly efficiently and be tuned exactly to their application area”, explains Schudt further. Out of this came the first engine construction kit for UAS systems from Sky Power and 3W-International with which customer- and application-specific propulsion solutions can be quickly visualized and implemented.
The engine construction kit consists of widely different components. At the centre is the basic engine, which can be equipped with both a carburettor and the new injection from Sky Power. To this is added as desired exhaust, silencer, and the new ECU and ignition. The engine can furthermore be provided with an e-drive or generator, which uses a converter to generate electrical energy for batteries and super capacitors — so-called
supercaps.

Super capacitors can be charged and discharged very much faster. Besides, they withstand a lot more switching cycles than rechargeables, so they lend themselves as substitutes for the latter whenever severe switching stress is required. Super capacitors’; application area stretches from provision of the weakest currents for data retention in static memories (SRAM) up into the power-electronics range, thus for instance, as the store of
electrical energy in the KERS system in Formula-1 racing cars. This is also exactly the property required in UAS propulsion units when they’re used as a hybrid system or to feed in energy to enhance the engine’s short-term performance.

All 3W-International engines can be equipped with this e-drive supercap system. The engine can therefore be used as a pure power generator for electrical motors, but also as a combined system in which electrical and combustion energy can be used in combination. Pure usage from combustion energy is likewise possible. The customer’s performance parameters and application area determine the engine’s usage type. “At the trade fair,
we’ll show visitors which modular components are necessary for an electrical emergency system, for direct engine use, for a range extender, and for hybrid applications”, explains Schudt. The hybrid application is being accorded a lot of attention at Sky Power because the demand for such propulsion solutions continues to intensify. “Hybrid drive units are going to be the propulsion source for unmanned systems in future”, continues Schudt.

The engine construction kit necessitates the propulsion manufacturer’s early involvement in the customer’s project. Here not only the right components are sought out, but they’e also got to be tuned to one another.

Thus for instance, the silencer must be orientated towards the basic engine’s cylinder volume in order to prevent a performance-diminishing backing up of exhaust gases. The e-drive must be selected based upon the desired electrical power and the ECU must be calibrated to the propeller used, the desired flight performance, and the flight surroundings. The same applies to the use of carburettors or injection. In addition, the customer requirement decides about the use. For instance, cost-optimized carburettors make sense for target drones, whereas a carburettor must be discouraged in the case of performance-optimized engines.

“Many details must be clarified with the customer before initial engine assembly. So we’ve got to maintain tight information exchange with the customer. After all, he’s getting an individualized product that has to conform with defined parameters. That’s why we’ve invested in additional in-house test systems in order to demonstrate the engine performance that the customer wants”, Schudt continues.

The engine construction kit is being introduced in 3W-International GmbH’s booth 2210 at Xponential 2018.

About

Sky Power GmbH is 3W-International GmbH’s performance partner. 3W-International is the leading manufacturer of 2-stroke internal combustion engines for UASs (unmanned aircraft systems). Sky Power’s function resembles that of a contract tuner for a car manufacturer. Customer adaptations, new developments, and the performance enhancement of 3W products are the goal of the partnership. Customer requests and new customer developments are also carried out.

To further expand market presence in North America, 3W-International is expanding its own direct sales structure in this important target market. With Constantin Diehl, a representative has been acquired who will actively represent the German engine manufacturer in the USA, Canada, and Mexico.

“We look forward to having Constantin Diehl, an excellent connoisseur of the North American UAS scene, on board”, remarks Karsten Schudt, managing director of 3W-International GmbH. Diehl has been president of Clusters UAS Colorado since 2013, and is thus engaged in various areas of unmanned air travel. He was previously active in sales for German automotive suppliers in the USA and Germany. “Many of our customer projects require strong sales-orientated project management, which Constantin brings with him via his professional experience”, according to Schudt.

This is especially important for the German engine manufacturer, because the company places value on great customer orientation and customer loyalty. “3W-International is the last remaining German 2-stroke combustion-engine manufacturer in the UAS industry. All of the others are meanwhile in Chinese hands. That means Made in Germany quality is exactly what our customers demand from us. But we can only do this if we communicate closely with the customer and know what current and future requirements he imposes on our products”, continues Schudt.

Diehl will support both sales project management and marketing for North America. “I look forward to collaborate with 3W-International. The company has a good reputation, and is known for its engine quality and innovation”, according to Diehl. Beginning in April, Diehl will support customers in the USA, Canada, and Mexico from Denver as a direct contact person.

About

With more than 35 years of experience in designing, manufacturing and testing 2-stroke engines, 3W-International GmbH has developed and patented the newest generation of Heavy Fuel (HF) engines for the Unmanned Aerial System (UAS) industry.

The quality of 3W engines stems from several factors. Technical expertise, long-term experience, tradition, and state-of-the-art production are the reasons for one of the highest qualities in the industry. 3W is opposed to manufacturing abroad, so customers can be sure every engine is of German quality.

From R&D, prototyping, purchasing, manufacturing, and calibration to in-time delivery, 3W guarantees constant and permanent quality control. Every manufacturing step is traceable. Employees are personally responsible for the fulfillment of 3W quality standards. Component suppliers and partners share these standards and guarantee these quality requirements.

3W-International GmbH authorised Sky Power GmbH for further development and performance enhancement of 3W engines. Along this line, the first new additional products and new performance engines will be presented even before Xponential 2018 in Denver.

“We look forward to the results because we can provide our customers with a broad range of performance engines”, explains Karsten Schudt, managing partner at 3W-International GmbH. In addition to the standard engines from 3W-International, propulsion units to be individually optimized in matters of consumption and performance were being repeatedly requested from the customers’ side. “Sky Power’s function is similar to a contract tuner for a car manufacturer. Customer adaptations, new developments, and performance enhancement of 3W products are the goal of that partnership.”, according to Schudt.

As the first step, Sky Power GmbH implemented an improvement in the ignition and injection systems, which are destined to be used in all 3W engines. “The initial tests are promising and show that we can expect massive fuel savings. We’ve already introduced the systems at individual conferences with positive feedback. The first engines will be presented to professional visitors at the Xponential in Denver.

3W-International will present the latest developments at booth no. 2210.

About 3W International GmbH

With more than 35 years’ experience in designing, manufacturing, and testing 2-stroke engines, 3W-International GmbH has developed and patented the newest generation of Heavy Fuel (HF) engines for the Unmanned Aerial System (UAS) industry.

The quality of 3W engines stems from several factors. Technical expertise, long-term experience, tradition, and state-of-the-art production are the reasons for one of the highest qualities in the industry. 3W is opposed to manufacturing abroad, so customers can be sure every engine is of German quality.

From R&D, prototyping, purchasing, manufacturing, and calibration to in-time delivery, 3W guarantees constant and permanent quality control. Every manufacturing step is traceable. Employees are personally responsible for the fulfilment of 3W quality standards. Component suppliers and partners share these standards and guarantee these quality requirements.

Increasing demand for 2-stroke engines has prompted Hessian company 3W-International to expand its sales structure. But it’s not just about the expansion of pure sales structures; it’s also about expanding project management capacities.

“We’re experiencing increasing demand for propulsion solutions. It involves not the sale of an engine off the shelf here, but customer-specific solutions tuned to the respective application goals. For this support, we need experienced project managers with a strong sale orientation”, explains Karsten Schudt, managing partner at 3W-International GmbH. That’s why George Bouvier was engaged as sales and project manager.

Bouvier is a technically versed, deeply experienced project manager who, in the last thirty years, has implemented complex production projects in the international electronics industry. “No two electronic products are alike. Given that, we have here a strong parallel to the drive units for unmanned systems, which will have to be tuned much more heavily to the applications, flight parameters, and areas of use”, according to Schudt.

For one thing, Bouvier will support the francophone market as well as selected international projects. “I look forward to the new assignment in one of the global markets of the future”, Bouvier declares. Following intensive, technical training Bouvier will act for 3W-International for the first time at this year’s Xponential.

About 3W-International GmbH

With more than 35 years’ experience in designing, manufacturing, and testing 2-stroke engines, 3W-International GmbH has developed and patented the newest generation of Heavy Fuel (HF) engines for the Unmanned Aerial System (UAS) industry.

The quality of 3W engines stems from several factors. Technical expertise, long-term experience, tradition, and state-of-the-art production are the reasons for one of the highest qualities in the industry. 3W is opposed to manufacturing abroad, so customers can be sure every engine is of German quality.

From R&D, prototyping, purchasing, manufacturing, and calibration to in-time delivery, 3W guarantees constant and permanent quality control. Every manufacturing step is traceable. Employees are personally responsible for the fulfilment of 3W quality standards. Component suppliers and partners share these standards and guarantee these quality requirements.

The second edition of U.T.SEC – Unmanned Technologies & Security Expo & Conference will take place on Wednesday and Thursday, 7-8 March 2018, at the Exhibition Centre Nuremberg, in parallel with Enforce Tac, the special exhibition for police equipment. The entire focus of this still quite new trade fair is on drones and unmanned systems, how they can be used to improve security, and also how to defend against these technologies in structures that are relevant from a security perspective. The patron for the event is Franz Josef Pschierer, Under-Secretary at the Bavarian State Ministry for Economic Affairs and Media, Energy and Technology.

The use of unmanned aerial systems (UAS) will increase greatly in the next few years, including – and in particular – in the security field. In the lead-up to U.T.SEC, we spoke with an expert in this area: Karsten Schudt has been Managing Partner of 3W-International GmbH since 2009. The Hesse-based company is a world leader in the supply of two-stroke combustion engines for unmanned aerial systems. The global activities of 3W-International have given Schudt extensive knowledge of international UAS applications.

Your work has given you a broad overview of international developments in the area of UAS technology. What general trends do you perceive?

Karsten Schudt (KS): The industry is currently undergoing a major transition. We assume that more systems are now being used for civilian than for military applications. This is placing new demands on unmanned aerial systems. The use of UAS swarms, hybrid drive technologies, self-determining flight systems, even smarter camera and sensor packages and increased performance at lower and lower costs are just a few of the changes that are happening right now. It is safe to say that UAS will change our lives fundamentally, including in the security field.

The focus on the efficient use of UAS seems to be constantly increasing. What technical developments can we expect in this area?

KS: Previously, efforts focused on developing flight-capable systems. The drivers at that time were military applications. But with the growth in civilian applications, the focus has switched to questions of economic and efficient use. Systems that don’t fly don’t earn money. This focus on efficiency has now also reached the military sphere. In other words, we have to be efficient in every area of application now: the market demands greater and
greater ranges, higher payloads and longer flying times, with the same or
lower energy consumption.

What effect will these developments have on the use of these devices in the area of security?

KS: The costs for using UAS will fall, regardless of how they are powered. UAS will also be used for an increasingly wide range of applications. The lower costs and greater flexibility will of course also play a part in how they are used in the area of police activities. Small systems with powerful cameras don’t cost a fortune, so they are a manageable investment for police and private security services. That also applies to larger systems fitted with combustion engines, for example. A helicopter of this type can be used for border protection on the one hand, but on the other it can also be used to search for boat people in the Mediterranean or to monitor shipping in the English Channel. The same goes for transportation tasks. Whereas in the past it was only possible to transport small quantities of medications or stored blood, now it is possible to transport full weeks’ worth of rations to
oil rigs far out in the North Sea, for example, for just a fraction of the usual cost.

Must we assume that UAS will redefine security tasks?

KS: Yes. We increasingly see in the press that UAS used in leisure time are violating security-relevant zones. We need to invest more in user education in this area. There are also threats that were previously unknown, such as industrial espionage or terror attacks using unmanned systems. The result will be substantial growth in drone defense. But some quite new opportunities are also arising. The combination of high-resolution camera,
face recognition software and drone will offer new possibilities in combating crime.

The wider public still often has a skeptical view of the use of UAS. To what extent could UAS provide decisive support in humanitarian activities, for example?

KS: UAS are extremely flexible and can be rapidly deployed. For humanitarian uses, in particular, speed is of the essence. Consider maritime rescue and compare the use of a traditional helicopter against a hybrid VTOL (Vertical Take Off and Landing) unit. In terms of camera systems, both vehicles are just as high-performance. But when it comes to
costs, the unmanned system beats the helicopter. That applies to acquisition, maintenance and actual use. In addition, the only limitation on flying time is fuel consumption, since there are no regulations governing pilot flying hours to consider. The autopilot system enables overflights of large areas to be performed automatically. The VTOL function means that a system like this can be used anywhere, just like a helicopter, since no large-scale infrastructure is required. The advantages are obvious.

What tasks can UAS assume besides these to improve their image?

KS: Essentially, if tasks have to be performed quickly and at low cost over large areas, UAS always have the advantage. For example, in the fight against poaching in Africa or the transportation of medications to remote areas of Papua New Guinea, or following a major earthquake, where the entire infrastructure has collapsed.

This is the second time that you are participating in U.T.SEC as a speaker. How relevant do you find this exhibition for questions of using UAS in security activities?

KS: The fast-moving nature of this sector means we need continuous, rigorous discussion about deployment opportunities, technical developments, and also risks. The first edition of U.T.SEC in 2017 showed that it provides the right framework for security applications relating to unmanned systems. The quality of the discussions was very high. It is
important to have an event like this, to facilitate discussion between all the players.

The 3W-180 SRE hybrid is unique in the drive technology for UASs. The engine features 180 ccm and a short-engine mass of 6.8 kg. Its high-power version achieves 38.5 hp at 7500 rpm (rated power is 28 hp at 6000 rpm).

A 5.66 hp/kg power-to-mass ratio with a consumption of 340 g/kW at full load results from this. The hybrid system, which feeds in 15 kW for a time (e.g. 30 s to 60 s) independently of the storage system’s capacity, is unique. This additional power can be drawn upon when starting a helicopter or during the acceleration of a fixed-wing aircraft.

“This hybrid system, as well as the very good power-to- mass ratio, opens up entirely new possibilities for us,” says Schudt. Since the engine isn’t sold as an individual engine, but instead only as a complete drive unit, a few projects are approaching completion at year’s end. “The engine must be adapted exactly to the UAS in order to optimally extract the former’s power. This time we’re working closely with our customers,” explains Schudt.

The Wankel engine’s benefits here are obvious for many customers. Its construction is compact with few moving parts. The degree of mechanical effectiveness is therefore favourable since there are few friction losses. The compact construction enables greater power density with light weight and modest space requirement. Displacement is smaller compared to other internal combustion engines. Nonetheless the Wankel engine offers high power and torque with very low-vibration engine operation. In contrast to the Otto engine,
the Wankel engine consumes less fuel at high rotational velocity. It can be driven with both gasoline and Heavy Fuel (HF).

“It’s precisely the high power with low mass and consumption that render the engine especially interesting for helicopter applications,” according to Schudt. Important manufacturers of unmanned helicopters contacted 3W-International in the months following the initial launch. “Specific requests are on the table and we assume
that we’ll implement a few of them in 2018,” confirms Schudt. Helicopters in particular need high rotational speeds climb and hover.

The same is true for hovercraft. The Hessian engine builder also receives requests from this product segment. The engine was moreover in demand as a generator system for additional applications outside of the UAS industry. So for construction machinery, the intent is to use the Wankel engine as a generator to ensure the power supply when the actual drive motor isn’t being used. An additional new target group is thinking about deployment as a small, flexible generator unit on manoeuvring areas, at large events, in civil protection, and on large construction sites. “We’re glad that the engine has a broad application spectrum and can be used in a multitude of vehicles. It doesn’t matter to us whether it finds application as a drive or as a power generator.

The engine is in demand both in military and civilian application areas. Noise emission has repeatedly been an aspect, especially in military applications. Customers complain that noise reduction for Wankel engines is too involved. By reason of our own development possibilities, we’re able to develop silencers, among other things, for each engine that comply completely with our customers’ specifications,” says Schudt, describing the
development portfolio. Observing silencer volume for the engine is particularly important here. “Otherwise the muffler diminishes the engine’s power,” continues Schudt.

That’s why the engine-silencer combination that optimally exploits the silencer’s effectiveness without having to worry about diminishing the engine’s power in the process can be sought out for each engine. Rotational speed in operation is crucial in this connection. “This is one reason why we work closely together with our customers during the engine’s initial integration. Our customers very much appreciate the fact that they thus
profit from our experience and in part realize more rapid project implementation,” says Schudt.

About 3W-International GmbH

With more than 35 years of experience in designing, manufacturing, and testing 2-stroke engines, 3W-International GmbH has developed and patented the newest generation of Heavy Fuel (HF) engines for the Unmanned Aerial System (UAS) industry.

The quality of 3W-engines stems from several factors. Technical expertise, long-term experience, tradition, and state-of- the-art production are the reasons for one of the highest quality levels in the industry. 3W is opposed to manufacturing abroad, so customers can be sure that every engine is of German quality.

From R&D, prototyping, purchasing, manufacturing, and calibration to on-time delivery, 3W guarantees constant and permanent quality control. Every manufacturing step is traceable. Employees are personally responsible for the fulfillment of 3W quality standards. Component suppliers and partners share these standards and guarantee these quality requirements.

The 3W-180 SRE hybrid is unique in the drive technology for UASs. The engine features 180 ccm and a short-engine mass of 6.8 kg. Its high-power version achieves 38.5 hp at 7500 rpm (rated power is 28 hp at 6000 rpm).

A 5.66 hp/kg power-to-mass ratio with a consumption of 340 g/kW at full load results from this. The hybrid system, which feeds in 15 kW for a time (e.g. 30 s to 60 s) independently of the storage system’s capacity, is unique. This additional power can be drawn upon when starting a helicopter or during the acceleration of a fixed-wing aircraft.

“This hybrid system, as well as the very good power-to- mass ratio, opens up entirely new possibilities for us,” says Schudt. Since the engine isn’t sold as an individual engine, but instead only as a complete drive unit, a few projects are approaching completion at year’s end. “The engine must be adapted exactly to the UAS in order to optimally extract the former’s power. This time we’re working closely with our customers,” explains Schudt.

The Wankel engine’s benefits here are obvious for many customers. Its construction is compact with few moving parts. The degree of mechanical effectiveness is therefore favourable since there are few friction losses. The compact construction enables greater power density with light weight and modest space requirement. Displacement is smaller compared to other internal combustion engines. Nonetheless the Wankel engine offers high power and torque with very low-vibration engine operation. In contrast to the Otto engine,
the Wankel engine consumes less fuel at high rotational velocity. It can be driven with both gasoline and Heavy Fuel (HF).

“It’s precisely the high power with low mass and consumption that render the engine especially interesting for helicopter applications,” according to Schudt. Important manufacturers of unmanned helicopters contacted 3W-International in the months following the initial launch. “Specific requests are on the table and we assume
that we’ll implement a few of them in 2018,” confirms Schudt. Helicopters in particular need high rotational speeds climb and hover.

The same is true for hovercraft. The Hessian engine builder also receives requests from this product segment. The engine was moreover in demand as a generator system for additional applications outside of the UAS industry. So for construction machinery, the intent is to use the Wankel engine as a generator to ensure the power supply when the actual drive motor isn’t being used. An additional new target group is thinking about deployment as a small, flexible generator unit on manoeuvring areas, at large events, in civil protection, and on large construction sites. “We’re glad that the engine has a broad application spectrum and can be used in a multitude of vehicles. It doesn’t matter to us whether it finds application as a drive or as a power generator.

The engine is in demand both in military and civilian application areas. Noise emission has repeatedly been an aspect, especially in military applications. Customers complain that noise reduction for Wankel engines is too involved. By reason of our own development possibilities, we’re able to develop silencers, among other things, for each engine that comply completely with our customers’ specifications,” says Schudt, describing the
development portfolio. Observing silencer volume for the engine is particularly important here. “Otherwise the muffler diminishes the engine’s power,” continues Schudt.

That’s why the engine-silencer combination that optimally exploits the silencer’s effectiveness without having to worry about diminishing the engine’s power in the process can be sought out for each engine. Rotational speed in operation is crucial in this connection. “This is one reason why we work closely together with our customers during the engine’s initial integration. Our customers very much appreciate the fact that they thus
profit from our experience and in part realize more rapid project implementation,” says Schudt.

About 3W-International GmbH

With more than 35 years of experience in designing, manufacturing, and testing 2-stroke engines, 3W-International GmbH has developed and patented the newest generation of Heavy Fuel (HF) engines for the Unmanned Aerial System (UAS) industry.

The quality of 3W-engines stems from several factors. Technical expertise, long-term experience, tradition, and state-of- the-art production are the reasons for one of the highest quality levels in the industry. 3W is opposed to manufacturing abroad, so customers can be sure that every engine is of German quality.

From R&D, prototyping, purchasing, manufacturing, and calibration to on-time delivery, 3W guarantees constant and permanent quality control. Every manufacturing step is traceable. Employees are personally responsible for the fulfillment of 3W quality standards. Component suppliers and partners share these standards and guarantee these quality requirements.