The Hirth F-30 is a
horizontally opposed four-cylinder,
two-stroke
A two-stroke (or two-stroke cycle) engine is a type of internal combustion engine that completes a power cycle with two strokes (up and down movements) of the piston during one power cycle, this power cycle being completed in one revolution of ...
,
carburetted aircraft engine, with optional
fuel injection, designed for use on
ultralight aircraft and
homebuilts. It is manufactured by
Hirth of Germany.
[Cliche, Andre: ''Ultralight Aircraft Shopper's Guide'' 8th Edition, pages G-4 Cybair Limited Publishing, 2001. ][Purdy, Don: ''AeroCrafter - Homebuilt Aircraft Sourcebook'', page 72. BAI Communications. ]
Development
The F-30 is equipped with a dual
capacitor discharge ignition
Capacitor discharge ignition (CDI) or thyristor ignition is a type of automotive electronic ignition system which is widely used in outboard motors, motorcycles, lawn mowers, chainsaws, small engines, turbine-powered aircraft, and some cars. It ...
system and is free-air-cooled, with optional fan cooling. The cylinder walls are electrochemically coated with
Nikasil
Nikasil is a trademarked electrodeposited lipophilic nickel matrix silicon carbide coating for engine components, mainly piston engine cylinder liners.
Development
Nikasil was introduced by Mahle in 1967, and initially developed to allow Wanke ...
. Standard starting is electric start and
recoil start
Rope start (also called pull start or ''rewind start'') is a method of starting an internal combustion engine, usually on small machines, such as lawn mowers, chainsaws, ultralight aircraft, small outboard motors and portable engine-generators. A ...
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 at 5,500 rpm if free-air-cooled or at 5,500 rpm if fan cooled. It has a factory rated
time between overhaul
Time between overhauls (abbreviated as TBO or TBOH) is the manufacturer's recommended number of running hours or calendar time before an aircraft engine or other component requires overhaul.
On rotorcraft, many components have recommended or ma ...
(TBO) of 1,200 hours. Currently in production.
;F-30E
:Four-cylinder horizontally opposed, two-stroke, aircraft engine with fuel injection. Produces at 5,500 rpm if free-air-cooled or at 5,500 rpm if fan cooled. It has a factory rated TBO of 1,200 hours. Currently in production.
;F-30S
:Four-cylinder horizontally opposed, two-stroke, aircraft engine with dual integral pumper carburetors. Produces at 6200 rpm if free-air-cooled or at 6,200 rpm if fan-cooled. It has a factory rated TBO of 1,000 hours. Currently in production.
;F-30ES
:Four-cylinder horizontally opposed, two-stroke, aircraft engine with fuel injection. Produces at 6,200 rpm if free-air-cooled or at 6,200 rpm if fan-cooled. It has a factory rated TBO of 1,000 hours. Currently in production.
Applications
Specifications (F-30ES)
See also
References
{{Hirth aeroengines
Hirth aircraft engines
Air-cooled aircraft piston engines
Two-stroke aircraft piston engines