BARNARD MICROSYSTEMS LIMITED

helping you keep an eye on things...

unmanned air ...

engines

Wankel engines

A small 49-PI Type II 0.3 cu in Wankel engine from www.osengines.com

• O.S. Engines 49-PI Type II 0.30 cu in Wankel engine
• The Nitto range of Wankel engines
• Cubewano Sonic 30 heavy fuel UAV engine 
• The UAV Engines Limited AR741 Wankel engine

O.S. Engines 49-PI Type II 0.30 cu in Wankel engine

The small O.S. Engines 49-PI Type II Wankel engine from http://www.osengines.com/engines/osmg1401.html

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20cc displacement engine running on glow (Alcohol) fuel for use in an airplane.

Our thanks to Nitto Manufacturing for supplying a copy of the photograph above and the data below.

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20cc displacement engine running on glow (Alcohol) fuel for use in a helicopter.

Our thanks to Nitto Manufacturing for supplying a copy of the photograph above and the data below.

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20cc displacement engine running on Gasoline for use in an airplane.

Our thanks to Nitto Manufacturing for supplying a copy of the photograph above and the data below.

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20cc displacement engine running on Gasoline for use in a helicopter.

Our thanks to Nitto Manufacturing for supplying a copy of the photograph above and the data below.

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Notes

• The silencer made by HATTORI Model can be supplied as an optional part by NITTO MFG. WORKS.
• NITTO MFG. WORKS can make an offer for a "Lower Frame Set" as one of the optional items to make it easier to mount our Wankel Rotary Engines. We recommend "Voyager GS-R" or "Z230 - R" helicopters made by JR, to which the above mentioned optional items can be fitted. You can place your order including these helicopters.
• Please refer to our pamphlet in http://www.nitto-mfg.com/Specifications.htm .

Contact information

NITTO MFG. WORKS

YUZO  SARATANI President

5-2-33, Wakae-Higashimachi,

Higashiosaka City

Osaka 578-0935 Japan

Tel : +81-6-6723-4311

Fax : +81-6-6723-4433

web-site: http://www.nitto-mfg.com/english.htm

E-Mail  : nitto@nitto-mfg.com

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- from http://www.shephard.co.uk/UVOnline/Default.aspx?Action=-187126550&ID=4d55c4af-96b1-422c-a5eb-79d99016b1b4

Cubewano Limited, a UK company, have announced the release of its first heavy fuel UAV engine. The engine, a 5 hp air-cooled rotary engine, incorporates advanced materials and technology and has a bespoke fuel injection system. This advance release enables airframe manufacturers to evaluate and package the engine, with a view to production models being available in 3-6 months time.

Birmingham, UK April 2, 2008 -- Cubewano announce the release of the pre production development version of its 5 hp heavy fuel engine. The engine is a lightweight, fuel injected, 5 hp, air cooled, single rotor internal combustion engine of the Wankel rotary type.

After many months in development Cubewano are finally happy with the performance of their 5 hp engine to release it for sale.  The engine in many respects advances the technology of the Wankel rotary engine by utilising advanced materials including ceramics and specialist coatings to achieve an extremely lightweight 1.5 kg engine.

Cubewano director Craig Fletcher states: “We were convinced that the spark ignition rotary engine was the way to go for small heavy fuel applications but finding small enough fuel injection systems to work under these conditions proved very difficult”. Cubewano have developed their own proprietary ECU system for this application which includes a MAP (Manifold Air Pressure) sensor for automatic altitude compensation.

The engine is designed to use a recirculating oil system and a lightweight ECU, about the size of a matchbox. However, for development purposes, Cubewano have been using a full size ECU and pre mix lubrication. The decision to release the pre-production version is to enable airframe manufacturers to get a head start testing and packaging the Cubewano engine.

- above and below from http://www.cubewano.com/cubewano/userfiles/file/A4_Sonic30_001.pdf

About Cubewano Limited:

Cubewano, formed in 2007, design and manufacture small, high quality, high power-to-weight ratio internal combustion engines, currently in the 3 to 7 hp range, with multi-fuel capability including Kerosene (also known as JP8, JET-A1 and Heavy Fuel ). The company is based in the heart of British engineering in Birmingham, West Midlands.

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- from http://www.uavenginesltd.co.uk/

Design Features:

• Exceptionally high power-to- weight ratio.
• Economical fuel consumption.
• Low cross sectional area.
• Low levels of vibration.
• Long life

Background:

• The UAV Engines AR741 has an outstanding power-to-weight ratio, combined with much longer life and better SFC, than any alternative engine.
• It has been developed from the mature UAV Engines AR731 target drone engine, to meet the needs of small surveillance-type UAVs.
• The UAV Engines AR741 engine has successfully completed a 150 hour FAR-33 type endurance test.

Technical Specifications:

- from http://www.uavenginesltd.co.uk/

• Power-to-weight ratio = 2.64 kW / kg
• Fuel efficiency = 1.046 J / cc_fuel_air_mixture

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