REFLECTOR:Strakes
KeithHallsten
reflector@tvbf.org
Sun, 23 May 2004 16:44:47 -0700
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Joe,
When I built my strakes, I built a support frame under each wing that =
maintained the twist of the center section spar so as to keep the wings =
at the correct angle of incidence throughout the (months long) =
strake-building process. It carried a portion of the weight of each =
wing, but not all of the weight of the wing, and certainly did not =
support the fuselage. It fit tightly to the wing, so that it couldn't =
get bumped out of position. I am building a fixed-gear, so the fuselage =
was supported by the gear legs. If you are building an RG, you could =
support the fuselage on a cradle. =20
That said, the critical factor is just that your supports are symmetric. =
That way you will end up with the same geometry on both strakes. Go =
for it!
Keith Hallsten
=20
----- Original Message -----=20
From: Joe=20
To: reflector@tvbf.org=20
Sent: Sunday, May 23, 2004 2:49 PM
Subject: Re: REFLECTOR:Strakes
Scott,
Thanks for your reply. By 0 on incidence angles I did mean a zero =
bubble on the level attached to the respective incidence measuring tool. =
Leading edge is 2 7/8" above the level of the bottom of the CS spar.
Should the wing be carrying the weight of the fuselage during this =
process? or is the wing on only to provide leverage for positioning the =
spar's rotational angle?
Thanks,
Joe
----- Original Message -----=20
From: Scott Baker=20
To: reflector@tvbf.org=20
Sent: Sunday, May 23, 2004 4:46 PM
Subject: Re: REFLECTOR:Strakes
----- Original Message -----=20
From: Joe=20
To: reflector@tvbf.org=20
Sent: Sunday, May 23, 2004 1:17 PM
Subject: REFLECTOR:Strakes
I was wondering if those who have gone before me might review my =
setup and comment before I glass in my first lower strake. Started the =
strakes yesterday. Put the wings on, supported AC by the wing tips, =
leveled longitudinal and lateral axis, rechecked canard incidence and =
adjusted wing incidence, trimmed and fit the lower left strake. Ready =
to glass the lower stake in place this afternoon, but first I am =
rechecking my setup to make certain everything is set right. My setup =
is as follows:
The wings are being supported 12" inboard of the tips.
The landing gear is not carrying any load.
The forward end of the fuselage is being supported under the =
canard bulkhead.
The canard is level in the lateral axis.
The canard incidence angle is 0.
SB> By this you mean the Canard Incidense Measuring tool (the =
bubble level mounted to a short piece of plywood in the shape of the =
canard airfoil) is level.
The Center Section Spar is level in the lateral axis.
The main wing incidence is 0, set by foam blocks between the wing =
and support structure near the tips.
SB> Same question for the main wings - you are using the Main Wing =
Incidense Measuring tool - and that is what's showing level?
The main wing incidence is being measured:
Leading Edge - measurement point 1" outboard of the strake =
main wing junction.
Trailing edge - measurement point 125" inboard of the wing =
tip.
Please let me know if this setup sounds right.
SB> Everything sounds good - be sure the leading edge of the =
strake - where it attaches to the fuselage - is in the correct position =
as per the construction manual. Good luck.
Scott B.
Thanks,
Joe
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<DIV><FONT face=3DArial size=3D2>Joe,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>When I built my strakes, I built a =
support=20
frame under each wing that maintained the twist of the center =
section spar=20
so as to keep the wings at the correct angle of incidence throughout the =
(months=20
long) strake-building process. It carried a portion of the weight =
of each=20
wing, but not all of the weight of the wing, and certainly did not =
support the=20
fuselage. It fit tightly to the wing, so that it couldn't get =
bumped out=20
of position. I am building a fixed-gear, so the fuselage was =
supported by=20
the gear legs. If you are building an RG, you could support the =
fuselage=20
on a cradle. </FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>That said, the critical factor is just =
that your=20
supports are symmetric. That way you will end up with the same =
geometry on=20
both strakes. Go for it!</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Keith Hallsten</FONT></DIV>
<DIV><FONT face=3DArial size=3D2> </FONT></DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- </DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Djewen@comporium.net =
href=3D"mailto:jewen@comporium.net">Joe</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dreflector@tvbf.org=20
href=3D"mailto:reflector@tvbf.org">reflector@tvbf.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, May 23, 2004 2:49 =
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: =
REFLECTOR:Strakes</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>Scott,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Thanks for your reply. By 0 on =
incidence=20
angles I did mean a zero bubble on the level attached to the =
respective=20
incidence measuring tool. Leading edge is 2 7/8" above the level =
of the=20
bottom of the CS spar.</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Should the wing be carrying the =
weight of the=20
fuselage during this process? or is the wing on only to provide =
leverage=20
for positioning the spar's rotational angle?</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV><FONT face=3DArial size=3D2>Thanks,</FONT></DIV>
<DIV><FONT face=3DArial size=3D2>Joe</FONT></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<DIV>----- Original Message ----- </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Dsbakr@comcast.net href=3D"mailto:sbakr@comcast.net">Scott =
Baker</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dreflector@tvbf.org=20
href=3D"mailto:reflector@tvbf.org">reflector@tvbf.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, May 23, 2004 =
4:46=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> Re: =
REFLECTOR:Strakes</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2></FONT> </DIV>
<BLOCKQUOTE dir=3Dltr=20
style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5px; =
BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<DIV style=3D"FONT: 10pt arial">----- Original Message ----- =
</DIV>
<DIV=20
style=3D"BACKGROUND: #e4e4e4; FONT: 10pt arial; font-color: =
black"><B>From:</B>=20
<A title=3Djewen@comporium.net =
href=3D"mailto:jewen@comporium.net">Joe</A>=20
</DIV>
<DIV style=3D"FONT: 10pt arial"><B>To:</B> <A =
title=3Dreflector@tvbf.org=20
href=3D"mailto:reflector@tvbf.org">reflector@tvbf.org</A> </DIV>
<DIV style=3D"FONT: 10pt arial"><B>Sent:</B> Sunday, May 23, 2004 =
1:17=20
PM</DIV>
<DIV style=3D"FONT: 10pt arial"><B>Subject:</B> =
REFLECTOR:Strakes</DIV>
<DIV><BR></DIV>
<DIV><FONT face=3DArial size=3D2>
<DIV>I was wondering if those who have gone before me might review =
my=20
setup and comment before I glass in my first lower strake. =
Started=20
the strakes yesterday. Put the wings on, supported AC by the =
wing=20
tips, leveled longitudinal and lateral axis, rechecked canard =
incidence=20
and adjusted wing incidence, trimmed and fit the lower left =
strake. =20
Ready to glass the lower stake in place this afternoon, but first =
I am=20
rechecking my setup to make certain everything is set right. =
My=20
setup is as follows:</DIV>
<DIV> </DIV>
<DIV>The wings are being supported 12" inboard of the tips.</DIV>
<DIV>The landing gear is not carrying any load.</DIV>
<DIV>The forward end of the fuselage is being supported under the =
canard=20
bulkhead.</DIV>
<DIV>The canard is level in the lateral axis.</DIV>
<DIV>The canard incidence angle is 0.</DIV>
<DIV><FONT color=3D#ff00ff>SB> By this you mean the Canard =
Incidense=20
Measuring tool (the bubble level mounted to a short piece of =
plywood in=20
the shape of the canard airfoil) is level.</FONT></DIV>
<DIV>The Center Section Spar is level in the lateral axis.</DIV>
<DIV>The main wing incidence is 0, set by foam blocks between the =
wing and=20
support structure near the tips.</DIV>
<DIV><FONT color=3D#ff00ff>SB> Same question for the main wings =
- you are=20
using the Main Wing Incidense Measuring tool - and that is what's =
showing=20
level?</FONT></DIV>
<DIV>The main wing incidence is being measured:</DIV>
<DIV> Leading Edge - measurement =
point 1"=20
outboard of the strake main wing junction.</DIV>
<DIV> Trailing edge - measurement point 125" =
inboard of=20
the wing tip.</DIV>
<DIV> </DIV>
<DIV>Please let me know if this setup sounds right.</DIV>
<DIV><FONT color=3D#ff00ff>SB> Everything sounds good - be sure =
the=20
leading edge of the strake - where it attaches to the =
fuselage - is=20
in the correct position as per the construction manual. Good =
luck.</FONT></DIV>
<DIV><FONT color=3D#ff00ff>Scott B.</FONT></DIV>
<DIV> </DIV>
<DIV>Thanks,</DIV>
=
<DIV>Joe</DIV></FONT></DIV></BLOCKQUOTE></BLOCKQUOTE></BLOCKQUOTE></BODY>=
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