This calculation should provide an
accurate true airspeed. So, no the wind speed should not have an effect
if it is the same during all 4 test runs. (however not likely that it
would be exactly the same) if he had reported his true airspeed on each
run, he could have made a determination as to the accuracy of his airspeed
indicator.
Bill
From: Lancair Mailing List [mailto:lml@lancaironline.net] On Behalf Of Colyn Case
Sent: Tuesday, December 10, 2013
8:43 AM
To: Lancair
Mailing List
Subject: [LML] Re: Gap Seals
Doesn't it work out that your average on a windy day is lower than the
average on a calm day?
(there's always some x-wind effect on each of the 4 headings)
On Dec 9, 2013, at 5:10 PM, Douglas Brunner wrote:
I have been
interested in how much extra speed I can get out of my Legacy using gap seals
and other similar aerodynamic “tricks”.
Today I ran the
plane in the “Before” condition. Tomorrow, I intend to put on
gap seals and change out my cowl rings to a more aerodynamic pair.
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Legacy Speed Test – N241DB
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Date 12/9/13
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30
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252
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8,000
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ft
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63
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Deg. F
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300
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232
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2,600
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23.3
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inches
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210
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221
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18.5
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GPH
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1,275
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Deg. F
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120
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242
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1,175
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Deg. F
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236.75
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Any bets on the
improvement with gap seals, etc? I am guessing 4 knots.