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Old Jan 07, 2013, 08:57 PM
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Originally Posted by TTRotary View Post
Thx Trevor. Thanks to you, I'm trolling that section every day to get an idea of prices. I know this is for example only, but I might stay away from this particular one though, as I've read that the P-70 is a bit of a dog among modern turbines with especially slow spooling. I saw some nice-looking boomerangs complete for $3K the other day.
Yes... P-70's are some very slow spooling turbines... but they were a good solid engine. I hear people joking about starting them, pushing up the throttle... going to get a drink... and then coming back... and the turbine is just coming up. (lol) But realistically... I think I've heard 6 to 10 seconds from idle to full. (very slow) But... when you are flying... if you keep it above 1/4 throttle... the response to full is only around 3 seconds. (not too bad)

One thing to remember... with a turbine, the thrust isn't linear, as with a prop engine. Turbine thrust is exponential. So... 1/4 throttle, is only about 1/10th the thrust. (not too bad)

The newer Jet cat engines are around 3 seconds. (idle to full)
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