Originally Posted by Nuts
The Westland Gazelle is powered by a Turbomeca Astazou turboshaft engine (for the uninitiated that's a jet engine with a shaft drive). Jet engine combustion chambers are continuous combustion (no pistons) and run on a very wide range of fuels compared to piston engines. OK - nothing to do with RIBs, but be careful what you deduce from this comparison - it doesn't mean the fuels are that similar.
Absolutly right!!. It is costing a huge amount of money to develop the engine to run on diesel. Its completly different to F44/JP5.
(I did all the Trials work for the optimax JP5 engines in the uk by the way)
To get the Engines to run on diesel you have to alter compersion ratios ignition mapping and lubrication systems etc etc.Im not allowed to say how its done but its cost well over a million Quid to do so far. Its actually very complicated.
The big problem with diesel is that after a few hours the piston rings get stuck because of all the carbon, the spark plugs also get totally covered.
Helicopter engines are quite alot different than outboard motors, luckily i used to be an Aircraft engineer before i started playing with boats so its good to know how both work!