Specification:
- Displacement(c.c. / cu.in.): 2.93 c.c. / .179 cu.in. 
- Bore(mm / in.): 16.2 mm / 0.638 in. 
- Stroke(mm / in.): 14.2 mm / 0.559 in.  
- Practical R.P.M.(R.P.M.): 2,500 ~ 18,000 rpm 
- Output(BHP/RPM): 0.45 BHP / 17,000 RPM
- Weight(g/oz): 162.2 g / 5.72 oz 

The Thunder Tiger GP-18 airplane engine is designed and developed under the ''Green Power" concept and feature a one-piece crankcase with an integrated carburetor body design to lower overall parts count.
No mounting screws are required for the cylinder head and backplate and a cast slot engine mount design simplifies the machining process.
Equipped with 3-chamber muffler, noise levels are greatly reduced while delivering excellent performance and lower fuel consumption.
Finally, the swept-back needle valve design and precision air bleed carburetor make operating the GP-18 airplane engine a safe, reliable and simple procedure providing you with years of trouble-free use.

Designed for sport airplane use
One-piece carb-crankcase structure
Bronze bushing support for easier maintenance
Aluminum piston with Nickel-plated brass cylinder liner
Air bleed carburetor design for easier adjustment
Swept back needle valve for added safety
CNC-machined aluminum heat sink head and backplate
Dual engine mount design
Forward side exhaust port
3-chamber muffler included
Redline R2 glow plug included