This is the Pro-39H Helicopter Engine from Thunder Tiger. With its largest displacement available in the popular 30-size class, the Pro-39H engine is one of the most powerful RC helicopter engines in this class on the market. Customers who have tried the Pro-39H all agree it is one of the most user-friendly and best perfoming engines for any 30-zise helicopter. the affordable price of the Pro-39H engine makes it the ideal engine for beginners who are just starting out. The Pro-39H works best in helicopters with gear ratios ranging from 9.1:1 to 9.8:1, and thi sengine develops peak horsepower at 16,000 to 18,000 rpm.
This engine uses short standard plug plus, similar to the O.S. range of standard glow plugs. The standard glow plug for this engine is the Thunder Tiger R2 glow plug (TTR9281). These engines will also work well with the O.S. A5 and #8 glow plugs.
- Displacement: 0.394 cu in (6.45cc)
- Bore: 0.850" (21.6mm)
- Stroke: 0.693" (17.6mm)
- Output: 1.35 hp @ 16,000 rpm
- RPM Range: 2,000 - 17,000
- Weight w/o Muffler: 10.23oz (290g)