Today's Message Index:
----------------------
1. 11:52 AM - landing gear questions (D. Engelkenjohn)
2. 01:37 PM - Re: landing gear questions (Christian Bobka)
3. 03:12 PM - Landing gear (lshutks@webtv.net (Leon Stefan))
4. 04:48 PM - Re: substituting 7075 T6 aluminum for 4130 steel (Jack Phillips)
5. 04:52 PM - Landing Gear Questions (D. Engelkenjohn)
Message 1
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| Subject: | landing gear questions |
--> Pietenpol-List message posted by: "D. Engelkenjohn" <wingding@usmo.com>
Hi everyone:
I am getting ready to work on the landing gear legs for my corvair
powered Piet and intend to use the Bill Rewey designed jig that was
shown in the Jan. 2003 BPA newsletter.
The question is: Bill Rewey moved his axle 4" from the front joint
of the landing gear, which is 4 and 3/8" ahead of BP's design. Is this
right for the corvair engine with a long fuselage? I thought I read
somewhere that Bill Rewey felt it was too far forward but might be
mistaken on that. Was wondering what others were doing on theirs with
respect to the position of the axle in relation to the gear?
Any help greatly appreciated.
Dennis Engelkenjohn
Message 2
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| Subject: | landing gear questions |
--> Pietenpol-List message posted by: "Christian Bobka" <bobka@charter.net>
Dennis,
Wood gear? Metal gear? Which gear are you using? Which fuselage plans did
you use? 1932, 1933, or the "60s one for the corvair?
chris bobka
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com]On Behalf Of D.
Engelkenjohn
Subject: Pietenpol-List: landing gear questions
--> Pietenpol-List message posted by: "D. Engelkenjohn" <wingding@usmo.com>
Hi everyone:
I am getting ready to work on the landing gear legs for my corvair
powered Piet and intend to use the Bill Rewey designed jig that was
shown in the Jan. 2003 BPA newsletter.
The question is: Bill Rewey moved his axle 4" from the front joint
of the landing gear, which is 4 and 3/8" ahead of BP's design. Is this
right for the corvair engine with a long fuselage? I thought I read
somewhere that Bill Rewey felt it was too far forward but might be
mistaken on that. Was wondering what others were doing on theirs with
respect to the position of the axle in relation to the gear?
Any help greatly appreciated.
Dennis Engelkenjohn
Message 3
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--> Pietenpol-List message posted by: lshutks@webtv.net (Leon Stefan)
Hi Dennis: I built my landing gear with the wheels positioned foreward
per Bill Rewey's directions. It's not a Corvair thing, It's a brake
thing. Bill told me that the original placement is fine with no brakes,
but the tail end weight is too light if you are using brakes. It is
done to help prevent nose over. Leon S. Ks.
Message 4
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| Subject: | substituting 7075 T6 aluminum for 4130 steel |
--> Pietenpol-List message posted by: "Jack Phillips" <pietflyr@bellsouth.net>
DJ,
My two cents worth, rather than paying $400 for the fittings, invest $200 in
one of those metal cutting bandsaws the Grizzly advertises in Sport Aviation
(check out www.grizzly.com). That was one of the first tools I bought when
starting on this project and it has been a real time saver. Between that
and a good 9" disc sander, you can cut, shape and dress just about all the
steel parts you will need to make. Since the bandsaw is really a pipe
cutting saw, it is excellent for cutting all your tubing as well.
Again, just my two cents worth, but there are a lot of steel parts to make
for these planes.
Jack
-----Original Message-----
From: owner-pietenpol-list-server@matronics.com
[mailto:owner-pietenpol-list-server@matronics.com] On Behalf Of DJ Vegh
Subject: Pietenpol-List: substituting 7075 T6 aluminum for 4130 steel
--> Pietenpol-List message posted by: "DJ Vegh" <aircamper@imagedv.com>
I'm at the point now in the project where I need to build the center wing
section and bolt it up to my cabanes.
I'm building the GN-1 variant which has a slightly different method of
attaching the wing than a Piet. It uses .065" 4130 steel plates that bolt
to both sides of the center section spar and also to the wing spar. The
plates stick out past the spars and have a hole in them where you slip a
bolt through to join the center section and wing plates.
My problem is in cutting these plates. I do not have a slow speed metal
band saw and I'm not sure even if I did I'd want to cut the 4130 myself. So
I drew up the plates in a CAD format and was going to have a laser cutting
shop cut them out for me.
I just got the quote from a couple places today. Anywhere from $25 to $35 a
piece. There are 16 pieces total. That's $400 to $560 for wing spar
plates!!?*
WAY too much if you ask me. So I got to thinking. What's the problem if I
use .19" (3/16) 7075 T6 aluminum? I can use my carbide wood cutting
equipment to mill them out myself. I did a bit of research and found that
if I tripled the thickness, 7075 T6 aluminum would be equal to or stonger
than 4130 in tensile and shear strength.
If I do it in aluminum I save myself about $350. I can sure use that extra
$$ to get a carb (see
http://www.aeroconversions.com/images/Aero_Carb_032701.jpg ) for my Corvair.
I'll go 4130 steel, but I need a better(cheaper) solution to cutting them...
otherwise it's 7075 T6.
Gimme some feedback on this...
DJ Vegh
N74DV
imagedv.com/aircamper
Mesa, AZ
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Message 5
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| Subject: | Landing Gear Questions |
--> Pietenpol-List message posted by: "D. Engelkenjohn" <wingding@usmo.com>
Hi Everyone:
A little clarification: I am using the 60's plans with the long
fuselage and the metal gear with die springs instead of bungees. Talked
to Bill Rewey today and he had an update to the drawing in the
newsletter. Will be using a steerable tailwheel per Price plans, which
is a little heavy, and also brakes on 6" aircraft wheels.
Dennis Engelkenjohn
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