O.S. Max 105HZ-R DRS Helicopter Engine

Features:
Displacement of a 1.05 in the mounting space of a .90.
More displacement means more power, and these engines boost displacement by 15%!
Huge venturi boosts output even further.
The machined, blue anodized heatsink head is light in weight, and cools the engine efficiently.
Pressurized DRS (Demand Regulator System), ensures consistent fuel flow regardless of the heli's attitude.
Specifications:
Displacement: 1.048 cu in (17.17cc)
Bore: 1.442" (29mm)
Stroke: 1.024" (26mm)
Practical RPM: 2,000-16,500
Output: 3.75 hp @ 15,000 RPM
Weight: 21.46 oz (608g