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Author Topic: Repairing an Apprentice fuse- broken nose and tail  (Read 168 times)

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Offline Frank v B

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Repairing an Apprentice fuse- broken nose and tail
« on: April 02, 2021, 03:44:55 PM »
Wind gusts and gravity got the better of the Club Apprentice last Wednesday.

The nose was broken off completely (2nd time) and the tail sheared off (3rd time).

The repair approach is as follows:
Step 1- glue the pieces back together.
Step 2- strengthen the joints if needed.

Note: the prop is still in one piece.  Saves money. 8)

I will be using 5 minute epoxy.

Frank
« Last Edit: April 03, 2021, 08:21:08 AM by Frank v B »


"Never trade luck for skill"

Offline Frank v B

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Re: Repairing an Apprentice fuse- broken nose and tail
« Reply #1 on: April 02, 2021, 09:06:02 PM »
Found the cause of the problem.  The elevator horn broke.  That's why it did a near loop and could not be corrected. 
Usually a post crash analysis shows it to be Pilot error.

F.
"Never trade luck for skill"

Online GuyOReilly

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Re: Repairing an Apprentice fuse- broken nose and tail
« Reply #2 on: April 02, 2021, 09:48:48 PM »
I lost a trainer that way on its maiden flight.
That is when I decided to only use metal clevisses.

Offline Frank v B

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  • TEMAC - Assistant to the Assistant Greeter.
  • Real Name: Frank van Beurden
  • TEMAC #: 141
  • Started Flying RC: 1989
Re: Repairing an Apprentice fuse- broken nose and tail
« Reply #3 on: April 02, 2021, 10:26:15 PM »
Guy, thanks for trying to make me feel better.

Photos show
- fuselage nose finished
- fuse tail glued
- oops, found a tear in the wing.  Glued it and cut two layers of fibreglass cloth and folded it over the trailing edge.

Other repairs
- glued two tears in the bottom of the cowl. Added fibreglass cloth over the breaks.
- replaced two clevises- one on the nose wheel and one on the elevator (still OK but it was drilled out and a metal cross piece added by previous owner)
- replaced the elevator servo. The HS-81 servo had stripped gears.

All done.  If ugly planes last longer, this one will last forever!  8)


Frank
"Never trade luck for skill"

Offline Andy Hoffer

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Re: Repairing an Apprentice fuse- broken nose and tail
« Reply #4 on: April 03, 2021, 10:49:55 AM »
Found the cause of the problem.  The elevator horn broke.  That's why it did a near loop and could not be corrected. 
Usually a post crash analysis shows it to be Pilot error.

F.

So, @Frank v B is asking us to believe that he was not responsible for the broken elevator horn.   ;D

Andy