Specifications:
Displacement: 6.45 cc. / 0.394 cu. in.
Bore: 21.6 mm. / 0.850 in.
Stroke: 17.6 mm. / 0.693 in.
Crankshaft: UNC 1/4 - 28
Practical RPM: 2,000 ~ 22,000
Output: 1.35 BHP / 18,000 RPM
Weight: 290 g. wo/muffler / 10.22 oz.

All Thunder Tiger engines have been designed to combine high performance with easy handling and maintenance using CAD computer technology, resulting in consistent high quality and reliability. Subjected to rigorous quality control check ensures that it will provide years of trouble free use.

The PRO-Heli series are manufactured by automated computer-controlled machinery, resulting in a product that looks and performs better. the displacement at .394 cubic inches is the largest displacement engine available in the popular 30-size helicopter class, and directly fit in all popular machines. Precision air bleed carburetor makes adjustments simple, and efficient mufflers keep things quiet at the field.

Features:
Top grade CNC equipment, state-of-the-art technology are used
Improved carburetor; swept back for safety, which makes adjustments simpler
Forged aluminum connecting rod with dual bushings connects it all together
Improved quality; ISO9001 Certified which guarantees the maximum power and performance
Smooth running and long lasting power plant with front and rear ball bearings
.394 cubic inches is the largest displacement engine available in the popular 30-size helicopter class
Ringed-type piston
Designed for both beginners and experienced modelers