The YS 91ST is the latest in helicopter engine technology from YS. It is a bored and stroked version of the popular YS 61ST-2 which has been optimized to provide the ultimate in reliable horsepower for your helicopter.
Specifications:
Bore: |
27.7mm |
Stroke: |
24.8mm |
Displacement: |
14.95cc |
Weight: |
540g |
Practical rpm: |
2,000 ~17,000 |