Today's Message Index:
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1. 11:36 AM - Glasair Factory on wing root fairings (mppalmer@aol.com)
2. 04:36 PM - Re: Re: More on Wing Root fairings (westmeath)
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| Subject: | Glasair Factory on wing root fairings |
I forgot to mention that I got the idea for Spitfire type fairings from the (old)
Glasair factory.
Remember when Bob Gavinsky was flying around in the twin turbo Glasair III? (That
was right after Lancair had brought out the Lancair iV.)
Well, Bob hit a wall at some speed, where more power didn't make any difference.
I spoke over the phone with one of the factory guys (not Cliff), who said it
was due to the poor wing root/fuselage junction and that they thought a long,
rounded fairing was needed to kill the drag.
So I'm back to being confused as to why Jeff LaVelle isn't having the same issue
with a drag wall on his Reno winning racer.
Maybe he's done something really subtle back there?
Mike Palmer <><
Message 2
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| Subject: | Re: More on Wing Root fairings |
I vaguely recall reading a while ago about a Glasair III builder changing the angle
of incidence of the wing for better performance. A lower angle of incidence
might result in less trim drag at higher speeds.
-----Original Message-----
From: owner-glasair-list-server@matronics.com [mailto:owner-glasair-list-server@matronics.com] On Behalf Of mppalmer@aol.com
Sent: Friday, October 20, 2017 12:14 PM
Subject: Glasair-List: Re: More on Wing Root fairings
Interesting. I've tried to "look" at Lavelle's Reno Winning GIII from photos. (Never
seen if for real.) But I agree with you that if he's done anything about
the flap/fuse junction, it's not obvious.
I'm surprised NASA couldn't find anything obvious on Ken's plane. How then did
the GI guy in Barnstormers get 25 mph with his fence type fairings?
I do have my flaps reflexed, and I split the top of the fairing so that it could
mate with the top of the flap. We see 165 = 170 Knots True (190-195 mph) at
DA of 10,000' running LOP (7 GPH), so we've broken that barrier.
I put a few VG's near the front wing bracket. They moved the bug line on the horiz
stab in about an inch or two. (They really need to be by the front of the
rear window. But then they would have to be 2 inches tall and we would stick ourselves
getting in and out of the plane.)
Since someone tried Spitfire fairings already, maybe I'll try the TBM type vertical
fairing with horizontal fences.
(BTW, Robin asked earlier if I have tufted the fuselage. Answer: No. Can't see
the tufts from inside the plane. I have oiled the fuselage. The oil traces a hump
over the wing and then fades out about a foot after the trailing edge of the
flaps.)
I am basing all my theorizing on the fact that we don't get bugs on the inside
half of our horizontal stabilizer. What are other Glasair flyers seeing on their
tails?
-----Original Message-----
From: Glasair-List Digest Server <glasair-list@matronics.com>
Sent: Fri, Oct 20, 2017 12:13 am
Subject: Glasair-List Digest: 1 Msgs - 10/19/17
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1. 01:21 PM - Re: Glasair-List Digest: 0 Msgs - 10/18/17 (Charles Raymond)
________________________________ Message 1 _____________________________________
Time: 01:21:59 PM PST US
From: Charles Raymond <craymondw@aol.com>
Subject: Glasair-List: Re: Glasair-List Digest: 0 Msgs - 10/18/17
Before you saw off your wing fairings, I would look at the GL3 that did ove r 400
mph at Reno. Back in the early 1990's a builder installed a "Spitfire " type
wing fairing on his Gl3 and nothing much changed. Ken Johnson had NA SA wind
tunnel tests done on his GL3 and found nothing much. A Florida Gl2 driver sawed
off the rear of his wing fairings during the building process and attached
them to his flap so he could have the proper reflex and has t he fastest Gl2FT
I have ever seen, I think he cruises at 236 mph. Florida Compo beach members
performed measurements on Glasairs to see what makes unusually fast ones
and found fractions in difference. It wasn't until I s anded off a heavy Centuri
paint job and used the light weight PPG paint sys tem, removed a heavy radio
stack and installed a very light weight Garmin a nd removed heavy upholstery
for a total reduction of over 100 pounds in we ight loss. Then had a Nascar
mechanic rebuild my engine, exhaust and baffl ing along with a blended foil
c/p prop that I was able to break 190 mph cr uise speeds and now see 220/230
mph. I was also able to reduce elevator up trim that slows a plane down! My
mechanic saw that the factory FT exhaust a ctually choked the system!!! Now I
have to use full right rudder and right braking to prevent the plane from swerving
onto the grass on take offs. A nyone interested in a used Narco cheap?
----Chuck Raymond Gl2SFT driver Charles Raymond craymondw@aol.com
-----Original Message-----
From: Glasair-List Digest Server <glasair-list@matronics.com>
Sent: Thu, Oct 19, 2017 3:11 am
Subject: Glasair-List Digest: 0 Msgs - 10/18/17
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=======================
Online Versions of Today's List Digest Archive =======================
Today's complete Glasair-List Digest can also be found in either of the two Web
Links listed below. The .html file includes the Digest formatted
in HTML for viewing with a web browser and features Hyperlinked Indexes and Message
Navigation. The .txt file includes the plain ASCII version of the Glasair-List
Digest and can be viewed with a generic text editor such as Notepad or
with a web browser.
HTML Version:
http://www.matronics.com/digest/digestview.php?Style=82701&View=htm
l&Chapter 17-10-18&Archive=Glasair
Text Version:
http://www.matronics.com/digest/digestview.php?Style=82701&View=txt
&Chapter 17-10-18&Archive=Glasair
=======================
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Total Messages Posted Wed 10/18/17: 0
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