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arno7452(at)bellsouth.net
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 Posted: Wed Mar 21, 2007 4:21 am Post subject: Vne for CH701 |
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Listers,
I am trying to understand the "flutter" threshold for the 701. There are a
few times when flying near 10K msl will provide better cruise performance
and burn rate. However, the latest Kitplane magazine has an article that
sounds a little scary. It seems the IAS Vne at 10K feet msl is reduced
considerably. I have seen the formula suggesting you multiply the altitude
units by 1.5 to get percent reduction. At 10K msl, 10 x 1.5= 15% reduction.
If Vne at sea level is 110 mph then at 10K it would be 110 x 0.85 = 93.5 mph
IAS.
I would appreciate any comments clarifying this.
Ken Arnold
CH701 QB Kit about 75% complete
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frankroskind(at)HOTMAIL.C
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| Posted: Wed Mar 21, 2007 4:44 am Post subject: Vne for CH701 |
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Flutter is related to true airspeed not indicated or calibrated, so it
occurs at lower IAS when you get to higher altitudes.
From: "Ken Arnold" <arno7452(at)bellsouth.net>
Reply-To: zenith-list(at)matronics.com
To: <zenith-list(at)matronics.com>
Subject: Vne for CH701
Date: Wed, 21 Mar 2007 09:20:27 -0400
Listers,
I am trying to understand the "flutter" threshold for the 701. There are a
few times when flying near 10K msl will provide better cruise performance
and burn rate. However, the latest Kitplane magazine has an article that
sounds a little scary. It seems the IAS Vne at 10K feet msl is reduced
considerably. I have seen the formula suggesting you multiply the altitude
units by 1.5 to get percent reduction. At 10K msl, 10 x 1.5= 15% reduction.
If Vne at sea level is 110 mph then at 10K it would be 110 x 0.85 = 93.5 mph
IAS.
I would appreciate any comments clarifying this.
Ken Arnold
CH701 QB Kit about 75% complete
_________________________________________________________________
Interest Rates near 39yr lows! $430,000 Mortgage for $1,399/mo - Calculate
new payment
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