cpayne(at)joimail.com
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 Posted: Thu Jan 24, 2008 2:49 pm Post subject: (no subject) |
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> A modified CJ6s down under.
| Quote: | 160 Kts IAS cruise
1600 fpm climb
The next one will have a M601-B turboprop
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Bruce,
I not sure what power settings you are using but an M-14P powered CJ with a Yak paddle blade will climb at 2100 fpm with 2 people and full fuel. This number has been verified by a number of conversions. 3-blade props climb harder but don't seem to go any faster, not that I've seen anyway. You didn't mention an altitude for the 160KTS IAS but my 80% Sea Level cruise is 165 IAS and 168 KTS GPS (at) 80 F; full throttle and 2900 rpm is way faster but burns "petrol" at an alarming rate. At 180 KTAS, the ailerons are stiff and my head bounces of the canopy in turbulence. I suspect that the turboprop will not make a better airplane, only faster.
My old 285 HP engine could true out at 155 KTAS at 8500 MSL, but climb rate was only 1200 FPM. Some are faster, some are slower. Empty weight and rigging of the airframe and gear door fit accounts for most of the differences.
P.S. my CJ is modified a mite.
Craig Payne
cpayne(at)joimail.com (cpayne(at)joimail.com)
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