Here Ronald Valentine's custom Cox 020 Space Hopper glow engines. We modified many Cox engines over the years; some with front rotary, rear reed valve, rear drum rotary and disc valves. Some with dual ports and some schnuerle ported.

Technical data :

Bore                              7.8 mm
Stroke                           7.0 mm
Rpm                             30,200 rpm
Total combustion           0.33 ccm
Weight                           20 gram
Intake                           Disc Valve

Price                             $245.00