Hirth F-36
Solo 210

The Hirth F-36 is a single cylinder, two stroke, carburetted aircraft engine designed for use on ultralight aircraft, especially powered paragliders and very light ultralight trikes. The F-36 was formerly known as the Solo 210, before the design was purchased by Hirth. It is noted for its extremely light equipped weight of 28 lb (13 kg) including exhaust system, reduction drive and carburetor. Unit cost in 2009 was US$1819.

The engine uses free air cooling, single capacitor discharge ignition, with a single integral pump-type carburetor. The cylinder walls are electrochemically coated with Nikasil. Standard starting is recoil start with electric start optional. A quadruple V belt reduction drive system is an option with ratios of 1.8:1, 2.0:1 or 2.5:1.
 
The engine runs on a 50:1 pre-mix of unleaded 93 octane auto fuel and oil and produces 15 hp (11 kW) at 6000 rpm.

Applications:
Adventure F series
Air Est JCD 03 Pelican
Delta Sailplane Nomad
Fly Products Power
Fresh Breeze Solo
Hang Buggy ultralight trike
Paramotor Inc FX1
Rotec Rally 2
Spartan BP Parawing
Southern Skies Spymotor
UFM Easy Riser

Specifications:

F-36
Type: Single cylinder, two-stroke, aircraft engine
Bore: 70 mm (2.8 in)
Stroke: 54 mm (2.1 in)
Displacement: 208 cc (12.7 cu in)
Length: 275 mm (10.8 in)
Width: 359 mm (14.1 in)
Height: 341 mm (13.4 in)
Dry weight: 28 lb (12.7 kg) with reduction drive, exhaust system and recoil start
Fuel system: 1 X integral pumper carburetor
Fuel type: Minimum of unleaded 93 octane auto fuel
Oil system: 50:1 fuel/oil premix
Cooling system: free air
Reduction gear: four element cog belt with ratios of 1.8:1, 2.0:1 or 2.5:1 available
Power output: 15 hp (11 kW) at 6000 rpm
Compression ratio: 10.6:1