KFM 107 explained

The KFM 107 is a two-cylinder, two-stroke, single ignition, horizontally opposed aircraft engine designed for ultralight aircraft and motor gliders.^[1] ^[2]

The engine was designed and produced by the KFM (Komet Flight Motor) Aircraft Motors Division of Italian American Motor Engineering of Italy and has been out of production since 1986.

Development

The KFM 107 is a conventional twin-cylinder engine that is very compact and light weight at only 15.20NaN0 in its 107s version. The engine features single capacitor discharge ignition, a single Tillotson butterfly-type carburetor, integral fuel pump, tuned exhaust system and reed valve induction. It was offered with 2:1 belt drive reduction system. Starting is electric starter or recoil starter.

Most versions of the 107 produce 250NaN0 at 6300 rpm for five minutes for take-off and 22.50NaN0 at 6080 rpm continuous.

Variants

107s

"Standard" version, direct drive, recoil start, 250NaN0, weight 15.20NaN0

107e

"Electric" version, direct drive, electric start and alternator 250NaN0, weight 19.10NaN0

107rs

"Standard with Reduction" version, reduction drive, 250NaN0, weight 17.50NaN0

107er

"Electric & Reduction" version, direct drive, 250NaN0, weight 21.40NaN0

107e Maxi

Upgraded version with an OVC carburetor with fixed jets, 642NaN2 stroke, 334 cc (20.38 cu in), 11:1 compression ratio, 2.1:1 or optional 2.55:1 reduction drive. Produces 300NaN0 at 6300 rpm for five minutes for take-off and 270NaN0 at 6080 rpm continuous.^[3]

Notes and References

Cliche, Andre: Ultralight Aircraft Shopper's Guide 8th Edition, page G-5 Cybair Limited Publishing, 2001.
Web site: KFM 107. 2010-02-14. Black. Don & Margaret. August 2009. dead. https://web.archive.org/web/20091016071338/http://www.italmotion.com/1071.html. 2009-10-16.
Web site: KFM 107e Maxi. 2010-02-14. Black. Don & Margaret. August 2009. https://web.archive.org/web/20091016071406/http://www.italmotion.com/maxi.html. 2009-10-16. dead.