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Old Sep 16, 2010, 10:29 PM
Registered User
Malaysia, Federal Territory of Kuala Lumpur, Kuala Lumpur
Joined Jun 2007
358 Posts
Help!
How fix a broken tail boom ?

Hi

I've got a Binary 900 which need a tail fix. It broke in between the fuse and the elevator, some where right at the center :P

How and what is the best method to fix it properly? Thanks.
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Old Sep 16, 2010, 10:55 PM
Hugh Blackburn
floquet's Avatar
Melbourne, Australia
Joined Jun 2005
437 Posts
See this post:

http://www.rcgroups.com/forums/showthread.php?t=749124

Hugh
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Old Sep 17, 2010, 02:41 AM
Registered User
Malaysia, Federal Territory of Kuala Lumpur, Kuala Lumpur
Joined Jun 2007
358 Posts
Thanks buddy. At least i can read up and prepare myself before getting my hands dirty
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Old Sep 17, 2010, 06:31 AM
flying is not a dream
lebenj's Avatar
Spain, CT, Cardedeu
Joined Jan 2008
978 Posts
hi...

i broke 2 times the boom of one of my DEX.
the first time i tryed reparing it only with carbon tow and kevlar tow.
i wet the tows with epoxy then aply them.
the i instead of video tape (looks a good idea) i use directly normal tape, used in the ofice!
the result was good and the tape easy to take of!

the second time, i used a piece of carbon fiber cloth and also carbo tow.
maybe a little bit heavier, but looks really better now.
still using tape around the fix when curing the epoxy.
the result is good

the fix weight was really low. and my boom was broken near the pod, so quite nothing to add in the noise!
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Old Sep 17, 2010, 02:09 PM
Registered User
Congress, AZ
Joined Sep 2001
4,504 Posts
I've fixed many booms but have decided to just replace the boom. It's difficult to get the boom absolutely straight most of the time, and that means you have to deal with trim problems.

Just seems easier and quicker to put a new boom into the plane.

Opinions will vary.

Gary
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Old Sep 17, 2010, 05:03 PM
a.k.a. Bob Parks
Glendale, AZ
Joined Jun 2008
2,087 Posts
To fix my boom. I used similar techniqes as above, cloth, tow, wrap with tape.

I used a simple jig I cut from a piece of 2x4 on a table saw. The 2x4 needs to be as long as possible to hold the boom. First I cut both edges flat, then I set the blade at 45^ and cut a groove centered down one long edge. Then I cut a clearance notch out from the notched edge to not quite half way thru the 2x4, a bit longer than the repair area needed to be.

The notch also has to be aligned with the damaged area. Hold the boom along the edge and mark the area to be notched.

The VEE groove holds the boom in alignment, when it is attached firmly to the 2x4. The notch lets you work material around the boom.

\----v---\ ........ |____[""""""""]____|
thin edge ......... side of 2x4 bottom edge is grooved
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