Introduction

The PRO series helicopter ring-type engines are equipped with dual ball-bearings, Schnuerle porting, one ring-type piston / cylinder assembly and two-needles automatic mixture control carburetor. One full-throttle "blast off" will convince you of the awesome power-to-weight-ratio created from the PRO-70H (R), engine is good for all kinds of .60 size helicopter. Precision air bleed carburetor makes adjustments simple, and efficient mufflers keep things quiet at the field.