CS Twin .30 back on the stand after internal overhaul and R/C carb intake by Jon Fletcher.

The engine runs very well wide open throttle. It turns the RAM 10 x 6 propeller fitted at over 10,000 RPM. Minimal vibration. The noise is most impressive. I should have worn ear protection.

The twin needle R/C carb works well. However there is a problem. Unequal mixture distribution through the rotary intake valve causes the front cylinder to run leaner than the rear cylinder, and the front cylinder quits below 1/2 throttle.

Modification to even out mixture distribution between the cylinders will be undertaken.