The engine AMA 2.5 cc and 3.6 cc. Made in Czechoslovakia in 1953.
Aerol Engineering of Liverpool, produced 2 cc Hurricane and 2 cc Gremlin, before replacing both with the well known Elfin 1.8cc, in 1949
Variations of Pete Moor's geared twins. Impractical due to power / weight ratio, but good fun.
The engine F2D CSKAM 1.25 - 1976