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Posted for daniel newland <compositeguy@sbcglobal.net>:
Hey, many of you guys have a lot more experience than I do on turbines so
feel free to object here (as if I could stop you!) I first looked at the
Innodyn at the 2004 OSH show and it looked pretty neat! They did not have the
twin pack, just the single version with one rated to 255 HP for a weight of
180 lbs. The claimed fuel burn was 14 GPH at that HP.
Only problem is, when I calculate the Brake Specific Fuel Consumption using those numbers I get a BSFC of about 0.38 lb/hp-hr. I'm afraid there is no way a turbine engine of that size could have that kind of efficiency. I would guess it would burn at least 50% more fuel than that, even at altitude. I really like turbine engines, but it's hard to make the numbers work out in their favor at power levels below maybe 500 hp. I'd like to see an Allison/Rolls Royce engine in an ES as that might be the optimum package giving about 450 hp at sea level and something like 300 hp at 12,000 ft.
Gary Casey
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