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Old Aug 08, 2011, 04:06 PM
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Balsa to the Wall
Deep in the East Texas Piney Woods
Joined Dec 2001
4,627 Posts
Mini-HowTo
3DHS Buck Huck Motor Box replacement

Well, the second time I bashed the motorbox, I decided to try the motorbox replacement kit, and I was impressed by how easy and straightforward it was.


First off, save the balsa bits that broke off so you can put them back in place when you put the box in.
The tools I used were:
X Acto knife
diagonal cutters
mini needlenose pliers
micro bar clamps
wife's emery boards
Epoxy- 30 min and 6 min
thin and thick CA
Debonder
pipette
kicker

You should have some scrap balsa in case you have to replace some balsa pieces.

Here's a pic of the plane with the front of the box removed.
Then with the rear of the box removed,
then, finally with the box completely out.


Use plenty of debonder to soften the CA and then gently pry the parts apart with your X Acto.
Use the diagonals to cut thru the thin parts of the ply so that you can take it out in small pieces.
DON'T FORCE ANYTHING, let the debonder do its job.
When you have it apart, cut the residual CA off of the parts in the plane so that the new box will fit.
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Last edited by Chuck; Aug 08, 2011 at 04:45 PM.
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Old Aug 08, 2011, 04:20 PM
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Balsa to the Wall
Deep in the East Texas Piney Woods
Joined Dec 2001
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Now, we take the new box and assemble it completely outside the plane so that we know what goes where. IMPORTANT, make sure that you get the right and left sides positioned correctly and marked.

Here is a picture of the box parts laid out,
and then partially assembled.

You probably won't use all the parts in the kit.
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Old Aug 08, 2011, 04:28 PM
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Balsa to the Wall
Deep in the East Texas Piney Woods
Joined Dec 2001
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Now, we start replacing the box. I didn't have to replace any formers or bulkheads, luckily.

The next pix show the progression of the replacement.
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Old Aug 08, 2011, 04:33 PM
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Balsa to the Wall
Deep in the East Texas Piney Woods
Joined Dec 2001
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Almost finished, front of box clamped so Epoxy can cure.
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Old Aug 08, 2011, 04:39 PM
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Balsa to the Wall
Deep in the East Texas Piney Woods
Joined Dec 2001
4,627 Posts
Here is the motor mounted, then a pic of Jack with his new cowl and motorbox ready to huck.
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Old Oct 26, 2011, 11:31 PM
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inverted-i-fly
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United States, CA, Petaluma
Joined Mar 2011
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nice job, looks new again
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