GP40與GP61飛機用引擎為中型練習機用引擎，引擎動力飛機入門最佳選擇，搭配簡易調整化油器設定與高效率、低噪音消音器。

All Thunder Tiger engines have been designed to combine high performance with easy handling and maintenance using CAD computer technology. Major components of the engines are machined from the highest quality materials using state-of-the-art CNC manufacturing techniques, resulting in consistent-high quality and reliability. The GP series engines are equipped with maintenance-free bronze bushings, Schnuerle porting, a special ABN type piston and cylinder sleeve, an easily adjusted air bleed carburetor, and a safe angular needle valve. The engines have been designed for both beginners and experienced modelers.

The new GP series engine are designed & developed under the "Green Power" concept. They feature a one-piece crankcase with an integrated carburetor body design in order to have fewer parts. Less part provides fewer problems. No mounting screws are required for the machining process. Equipped with 3-chamber muffler, noise levels are reduced while providing excellent performance with low fuel consumption. Inherited are the swept-back needle valve design and precision air bleed carburetor to make operating safe, reliable and simple.All major components of Thunder Tiger engines are machined from the highest quality materials in our state-of-the-art manufacturing plant. Engines are then subjected to rigorous quality control checks to ensure that your engine will provide years of trouble free use.

Designed for sport airplane use.One-piece carb-crankcase structure.Bronze bushing support for easier maintenance.Aluminum piston with Nichel-plated brass cylinder liner.Air bleed carburetor design for easier adjusting.Swept back needle valve for more safety adjustment.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.

All the latest Thunder Tiger series engines have been designed to combine high performance with easy handing and maintenance using modern CAD computer technology. Major components of the engines are machined from the highest quality materials using state-of-the-art CNC manufacturing techniques, resulting in consistently high quality and reliability.The GP-07 engine is equipped with maintenance free bronze bushings, Schunuerle porting, special ABN piston and cylinder sleeve, easily adjusted air bleed carburetor, and safe angular needle valve. The GP-07 has been designed for both beginners and experienced modelers.