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The Reference on Airships

Engines and Propellers

In addition to this list, I have compiled a table with Light Engine Weights and other technical data for the engines below.

Really Light Engines (below 20 kg/44 lbs)

• Solo 210 - very lightweight single cylinder 2-stroke from Germany (14-20 HP, 12 kg). Also see Extrem Paramotors France which have set up a nice combination of a Solo 210 and 3-blade Arplast prop.
• Lark - lightweight single cylinder 2-stroke from the UK, available with electric start and generator (14-20 HP, 12 kg).
• Raket 120 - originally for go-karts, now for aircraft (14.9 HP, 6.8 kg).
• JPX - developed for drones the 2-cylinder D-320 is now offered with belt drive reduction for paramotors (24 HP, 34.2 lbs).
• König - small, radial, 3 and 4 cylinder, 2-stroke engines with high power to weight ratio.
• Kawasaki 440 - light opposed twin 2-stroke. Used with a 3 bladed 52" warp prop in some models of the Quicksilver MX ultralight.

Light Engines (above 20 kg/44 lbs)

• HKS-700E - relatively light 4-stroke twin made by HPower (60 HP/116 lbs)
• Rotax - most widely spread 2-stroke engines, from two to four cylinders. (Rotax Owners Association.)
• Zenoah - small one and two cylinder 2-stroke engines. Also see their US Dealer.
• Two Stroke International (2si) - heir to the Amw and Cuyuna 1 to 4 cylinder 2-stroke engines.
• Hirth - small one and two cylinder 2-strokes (F-33 single is 22 HP/ 35lbs; F-23 and 2702 two cylinders are 40 HP and heavier).
• Mid-West Engines - their rotary engines have a very good power to weight ratio and thus offer a real (if costly) alternative to 2-strokes with the reliability and lower consumption of 4-stroke engines.
• Wankel Rotary GmbH - the other manufacturer of rotary engines. Besides a 37 HP single rotor and a 75 HP twin rotor engine, Wankel offers the Twinpack (TM) engine that combines two twin rotors onto one single crank shaft. (Rotary Engine Website.)
• Briggs & Stratton - this manufacturer of Go-kart engines offers an interesting 4-stroke 20 HP engine, the Vanguard, which has been sucessfully used in the DA-11 high efficiency airplane.

Heavier Engines

• Homebuilt Aircraft Engine Directory - for a wider range of more powerful engines; with links.

Propellers

• Sport Prop Propellers - extremely light carbon props, ideal for ultralight airships.
• Arplast - great props made in France for paramotors and more.
• IVO Prop - popular composite propellers.
• Warp Drive - an other popular manufacturer of light composite props.