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Thunder Tiger - PRO-39H (R)

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Product No. TTR9604 MSRP: $177.99   The PRO series helicopter ring-type engines are equipped with dual ball-bearings, Schnuerle porting, one ring-type piston / cylinder assembly and two-needles automatic mixture control carburetor.   Specification:  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.