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1. 04:44 AM - Re: gap seal experiment (JOSEPH MATHIAS LINDA MATHIAS)
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| Subject: | Re: gap seal experiment |
Brian,
Good luck with the testing and the completion of your thesis. Thanks
for all your efforts and also your very informative reports and insights on
happenings at the Arion hangar.
I'll watch for the results of your experiments.
Best wishes, Linda Mathias
----- Original Message -----
From: "Brian Whittingham" <dashvii@hotmail.com>
Sent: Saturday, April 14, 2007 8:56 PM
Subject: Lightning-List: gap seal experiment
> <dashvii@hotmail.com>
>
> To all,
> The proposed gap seal experiment that I am going to be doing flight
> testing for is finally at hand. As soon as the guys get back from
> Sun-N-Fun I'll begin with the baseline tests, and then do a retest after
> the modifications are done. I can't tell you how much of an increase in
> anything that we'll get from doing this without the testing. My thesis
> states that we'll see an increase in top speed, an increase in
> endurance/range, an increase in roll rate and climb performance. Some
> negative things that I expect to have are an increase in stall speed and
> an increase in landing distances though. I don't expect that the stall
> speed increase will be more than a couple of knots. With such a short
> landing distance I don't expect that even 10% would matter.
>
> The things that I really want to focus on are stall speed and max speed.
> Secondarily will concentrate on climb and glide performances. All data
> will be converted back to ISA conditions for a reasonable comparison. The
> looks of the aircraft will change very slightly as most of the gaps to
> seal are on the underside of the aircraft, with only an aileron gap seal
> for the top. We will explore the entire envelope to make sure that it is
> safe and will investigate the performance gains. My basic results will be
> posted on this site in probably 2 months time.
>
> This will most likely be some of the last flying that I do with Arion
> since I am relocating to Houston. It has been a privelage and I am going
> to miss flying the Lightning's in particular. After flying Rick's plane
> and the test plane I will leave with about 60 some odd hours in Lightning
> aircraft. Now I plan to finish up my CFI and get some students to start
> teaching. Hopefully I can make it back to SYI again at some point to
> check on how things are going with the Arion team. Brian Whittingham
>
> _________________________________________________________________
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>
>
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