Rebel strut bolts
Posted: Sun Feb 19, 2012 12:20 pm
_________________________________________________________________From: Murtech Mailbox <murtech@murphyair.com>
To: Jesse Jenks <jessejenks@hotmail.com>
Subject: RE: Rebel strut bolts
Date: Fri, 07 Sep 2007 15:06:01 -0700
Hello Jesse,
I apologize for my delay in replying to your email, unfortunately a
emergency family matter took precedence; I'm sure you would fully
understand.
With the drilling of the strut material and attach blocks, we have no issue
with you upsizing the hole one (1) bolt size to overcome any drilling
imperfections. When drilling the block and strut material, may I suggest
temporally securing the blocks in place with bolts to hold the block and
strut material securely in place while drilling/upsizing the holes.
Thank you for your patience and have a good weekend.
Cheers,
Jeff McMurrer
Murphy Aircraft Mfg. Ltd.
Customer Technical Build Support
Email: murtech@murphyair.com
Fax: 604-792-7006
Visit www.MurphyAir.com for current aircraft manual updates & bulletins
This e-mail and any attachments it contains are confidential and
intended only for those to which it is addressed. Dissemination,
distribution, copying or action
taken as a result of its contents by anyone else is prohibited. If you have
received this e-mail in
error please delete it and notify the sender of its receipt. Thank you.
-----Original Message-----
From: Jesse Jenks [mailto:jessejenks@hotmail.com]
Sent: September-05-07 4:16 PM
To: Murtech Mailbox
Subject: Rebel strut bolts
Hello Murphy tech support, please help!
I built my wing struts according to the manual, first drilling the 5 holes
through each fitting block to 3/16" in a drill press. When I enlarged the
holes to 1/4" with a hand drill, they got off center slightly, so most of
the holes have a slight oblong to one end. The bolts still fit snugly, but
on one side or the other the bolt shaft is not fully engaging the strut
material around it's entire circumference. I thought I would be OK because
I
only drilled up a couple drill sizes at a time, and reamed the last pass.
Things got out of shape though. After I realized what was happening I
started using drill bushings clamped to the strut which made some
difference, but still not perfect. I think the best solution would be to
make a jig to hold the strut in a drill press, or milling machine, but
unfortunately it's too late for me because both struts now have some sloppy
holes.
What should I do? Do I have to start over from scratch with new strut
material, and new blocks? Can I enlarge all holes to 5/16"? Can I use the
struts the way they are now, and monitor to see if the bolts move at all
under load? Like I said, the bolts fit tightly, and the strut material is
engaged fully on one side of the holes. Is the clamping pressure of the
bolts enough to compensate for the compromised shear strength in the
bolt/strut interface?
Thank you.
Jesse Jenks
_________________________________________________________________
More photos; more messages; more whatever. Windows Live Hotmail - NOW with
5GB storage.
http://imagine-windowslive.com/hotmail/ ... ni_5G_0907
A place for moms to take a break!
http://www.reallivemoms.com?ocid=TXT_TAGHM&loc=us
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
-----------------------------------------------------------------