Comparison Air and Liquid cooling engines for Scout Helicopter

/ rec-horizon
Air Cooling GNX IO-390-X
t=15°C Gross power = 210hp
Net power = 198hp
t=35°C Gross power = 197hp
Net power = 185hp
Liquid Cooling IOX-390LS
t=15°C Gross power = 230hp
Net power = 222hp
t=45°C Gross power = 223hp
Net power = 215hp
Gross power - power without alternator and cooling fan
Net power - output power including all losses

[@johncarr123]

Can you design a version for the General Aviation experimental market? We would be interested in marketing the engine for the USA market.

[@johncarr123]

Would you consider marketing your supercharger technology to the Experinmetnal community? Your supercharger technology would be of interest as a bolt-on for 0-320 and 0-360 engines.

[@jacobtorba6442]

How do you increase the safety of such an engine? It's more modern I agree, but one of the biggest advantages of the old lycoming engines still used in helicopters like the R22 is that they're just so simple, not much can go wrong.

[@qwertyzhenya]

We just added a cooling jacket, with the valve mechanism and the piston remaining the same. The reliability of the mechanical supercharger is higher than the turbocharger. And we try to duplicate such details as a water electric pump and an electric fan.
Remains belt drive and water pipes and automotive radiator. Only these elements require additional attention.
However, in hot weather, the air cooling engine may not pick up a loaded helicopter or can not hang, which is solved by the water cooling engine.

[@chippyjohn1]

The Robinsons need rebuilds after 100 hours here in Australia because they get too hot. Poor quality engines and design. Liquid DOHC engines are much better.

[@chippyjohn1]

Your product looks nice, but over complicated. Modifying these obsolete american engines is going backwards.