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11-20-2009, 08:50 AM
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#1 |
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Super Contributer
 
Join Date: Jun 2008
Location: Bozeman, MT
Posts: 139
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Altitude & Prop Selection
OK. I tried to find a past thread on this but didn't find anything. I can't imagine this hasn't been discussed to death, so please forgive me if I'm beating a dead horse.
I fly at over 5000 feet and I find that even the most over powered (if there is such a thing!) airplanes struggle at this altitude. My 3w 106 on a PAU 36% Edge does OK, but can't sustain a hover. I tach'ed it a 6300 RPM and am running a 28x10 CF prop. Should I go up in diameter? Pitch? Both? Neither? Or should I just convince my wife to move? Any help would be GREATLY appreciated. Chris |
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11-20-2009, 09:08 AM
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#2 |
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I got a BIG BLOCK now ......
 
Join Date: May 2006
Location: Flying with the Best of Friends
Posts: 9,823
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Re: Altitude & Prop Selection
have you tried a Vess 28A yet ????
moving isn't a bad thought either ..................................... 
__________________
Donnie Chief Aircraft ........Godfrey Designs Florida Freestyle Aerobatics Association Torch Engines .........Dec. 31 .....RCACF FX3D feb 22-26........Mid FL 1/1/2012 |
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11-20-2009, 09:16 AM
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#3 |
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Bad-ass Super Contributer!
Join Date: Jan 2006
Location: co
Age: 51
Posts: 799
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Re: Altitude & Prop Selection
Wow how much does that thing weigh. There is one in our club the guy says its under 25 lbs. Anything under 27lbs should hover with ease. I have 2 Da 100s on 27.5 lbs planes on Vess 27A props turning 6300 and one of the Fields I fly at is at just under 7000 ft. I can hold a hover no problem at a little over half stick I'm guessing 75% . I cant help you with prop selection on a 3W 106.
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11-20-2009, 11:25 AM
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#4 |
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I'm done!!! Your loss!
Join Date: Jan 2006
Location: TFC
Posts: 3,338
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Re: Altitude & Prop Selection
Try 27x10............
__________________
*Insert witty comment here* |
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11-20-2009, 09:04 PM
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#5 |
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Super Contributer
Join Date: Jun 2008
Location: Bozeman, MT
Posts: 139
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Re: Altitude & Prop Selection
I know, right? You'd think the thing would have no trouble, but it sure does. Maybe I just can't hover. Hmmm. Someone told me going UP in diameter at high altitude was better than going up in pitch, but I'm trying to get a consensus before I go out & blow more money on a prop.
Moving sounds even better since we have two feet of snow on the ground already. Thanks for the replies guys. C |
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