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Hirth F-30

 

The Hirth F-30 is a horizontally opposed four-cylinder, two-stroke, carburetted aircraft engine, with optional fuel injection, designed for use on ultralight aircraft and homebuilts.

The F-30 is equipped with dual capacitor discharge ignition and is free air-cooled, with optional fan cooling. The cylinder walls are electrochemically coated with Nikasil. Standard starting is electric start and recoil start is not an option. The reduction drive system available is the G-40 gearbox with optional reduction ratios of 2.03:1, 2.25:1, 2.64:1, 2.96:1 and 3.33:1. A centrifugal clutch is also available as optional equipment.

The engine runs on a 50:1 pre-mix of unleaded 93 octane auto fuel and oil.

 

Variants:

F-30
Four-cylinder horizontally opposed, two-stroke, aircraft engine with a dual 38 mm diaphragm carburetors. Produces 85 hp (63 kW) at 5500 rpm if free-air-cooled or 80 hp (60 kW) at 5500 rpm if fan cooled. It has a factory rated TBO of 1200 hours.
 
F-30E
Four-cylinder horizontally opposed, two-stroke, aircraft engine with fuel injection. Produces 90 hp (67 kW) at 5500 rpm if free-air-cooled or 85 hp (63 kW) at 5500 rpm if fan cooled. It has a factory rated TBO of 1200 hours.

F-30S
Four-cylinder horizontally opposed, two-stroke, aircraft engine with dual integral pumper carburetors. Produces 100 hp (75 kW) at 6200 rpm if free-air-cooled or 95 hp (71 kW) at 6200 rpm if fan cooled. It has a factory rated TBO of 1000 hours.

F-30ES
Four-cylinder horizontally opposed, two-stroke, aircraft engine with fuel injection. Produces 110 hp (82 kW) at 6200 rpm if free-air-cooled or 105 hp (78 kW) at 6200 rpm if fan cooled. It has a factory rated TBO of 1000 hours.

 

Applications:
Acrolite
Aeros UL-2000 Flamingo
Airdrome Fokker D-VII
Airdrome Nieuport 24
Aviastroitel AC-7M
Denney Kitfox
DF Helicopters DF334
Falconar F11 Sporty
Howland H-2 Honey Bee
Kolb Mark III
Paladin Hercules
Peak Aerospace Me 109
Rans S-12
Titan Tornado

 

Specifications:  

 

F30
Cycle: 2 stroke
No cylinders: 4 opposed
Bore: 72 mm
Stroke: 64 mm
Compression: 9.5
Displacement: 1024 cc
Cooling: Air
Ignition: 4CDI
Reduction: mechanical gear 2.03/1 to 2.96/1
Weight: 48 kg
Max pwr: 95 hp at 5270 rpm

 

F-30ES
Type: Four-cylinder, two-stroke, horizontally opposed, aircraft engine
Bore: 72 mm (2.8 in)
Stroke: 64 mm (2.5 in)
Displacement: 1042 cc (63.6 cu in)
Length: 380 mm (15.0 in)
Width: 660 mm (26.0 in)
Height: 355 mm (14.0 in)
Dry weight: 105 lb (47.6 kg), including starter and exhaust system, 129 lb (58.5 kg) with gearbox, exhaust system and electric start. Fan cooling adds 8.5 lb (3.9 kg)
Fuel system: Fuel injection
Fuel type: unleaded 93 octane auto fuel
Oil system: 50:1 fuel/oil premix or oil injection
Cooling system: free air or fan
Reduction gear: G-40 gearbox with reduction ratios of 2.03:1, 2.25:1, 2.64:1, 2.96:1 and 3.33:1 available. Optional centrifugal clutch.
Power output: 110 hp (82 kW) at 6200 rpm with free-air cooling, 105 hp (78 kW) at 6200 rpm with fan cooling
Compression ratio: 9.5:1

 

 


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