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lcfitt(at)sbcglobal.net
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 Posted: Wed Aug 20, 2008 10:32 am Post subject: Aveoflash strobe lights (Leading Edge) |
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Mark,
I got his idea from Mark Ferkin in Idaho. He had built a Rans S7 after
having built a Model I, II and IV. On the Rans, there are no upper false
ribs, but rather a 12" aluminum strip that is glued to the spar and then
riveted to each of the ribs at the aft edge. I did this on my Model IV to
try to improve the leading edge conformance with Mr. Riblets airfoil design.
It is not a particularly difficult project, but needs some attention as the
aluminum doesn't want to conform to the shape of the rib. I have one done,
and want to attatch the wing tip and cover before removing it from the
rotissarie to start on the other one. If anyone else wants to try this,
drop a note and I will describe the pitfalls and the solutions I found.
Keeping in mind that the airplane won't fly until late next year at the
earliest so this is all in the prototype stage.
As I was working on it someone came by, saw what I was doing and mentioned
that he had talked to Harry Riblet once and was told that the most important
part of any airfoil was the first ten percent of the chord. The issue is
keeping the airflow laminar over the top of the wing. On our 42 inch chord
that would be the first four or five inches, right where the spar support
ends and the false ribs begin - the dip between ribs and false ribs. On
thinking about this, I suspect having the airfoil as designed in the first
10% the most significant performance enhancement would be stall speed. Only
time will tell.
Lowell
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thesupe(at)hotmail.com
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| Posted: Wed Aug 20, 2008 6:46 pm Post subject: Aveoflash strobe lights (Leading Edge) |
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My Avid MK IV Heavy Hauler also has the aluminum leading edge. Not sure if it was on earlier models or not. I know it wasn't done on my Model B stol wing. Jim Chuk kitfox 4 building Mn
[quote] From: lcfitt(at)sbcglobal.net
To: kitfox-list(at)matronics.com
Subject: Re: Re: Aveoflash strobe lights (Leading Edge)
Date: Wed C 20 Aug 2008 11:27:19 -0700
--> Kitfox-List message posted by: "Lowell Fitt" <lcfitt(at)sbcglobal.net>
Mark C
I got his idea from Mark Ferkin in Idaho. He had built a Rans S7 after
having built a Model I C II and IV. On the Rans C there are no upper false
ribs C but rather a 12" aluminum strip that is glued to the spar and then
riveted to each of the ribs at the aft edge. I did this on my Model IV to
try to improve the leading edge conformance with Mr. Riblets airfoil design.
It is not a particularly difficult project C but needs some attention as the
aluminum doesn't want to conform to the shape of the rib. I have one done C
and want to attatch the wing tip and cover before removing it from the
rotissarie to start on the other one. If anyone else wants to try this C
drop a note and I will describe the pitfalls and the solutions I found.
Keeping in mind that the airplane won't fly until late next year at the
earliest so this is all in the prototype stage.
As I was working on it someone came by C saw what I was doing and mentioned
that he had talked to Harry Riblet once and was told that the most important
part of any airfoil was the first ten percent of the chord. The issue is
keeping the airflow laminar over the top of the wing. On our 42 inch chord
that would be the first four or five inches C right where the spar support
ends and the false ribs begin - the dip between ribs and false ribs. On
thinking about this C I suspect having the airfoil as designed in the first
10% the most significant performance enhancement would be stall speed. Only
time will tell.
Lowell
---
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http://www.matronics.com/Navigator?Kitfox-List |
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