New Products Flash Sale
Thread Tools
Old Aug 21, 2012, 10:35 AM
grosbeak is offline
Find More Posts by grosbeak
Illegitimi non carborundum
grosbeak's Avatar
The patch turned out well after sanding.



And I continued gluing the wing sheeting.



I came across some information on how wetting one side of the sheeting will bend it away - I'm working on that now.
Sign up now
to remove ads between posts
Old Sep 07, 2012, 07:18 PM
grosbeak is offline
Find More Posts by grosbeak
Illegitimi non carborundum
grosbeak's Avatar
I finished the sheeting repair of the starboard wing. I soaked the second sheet for a couple of days, which was a big improvement over moistening one side of the first one. Far from perfect, but not bad for a first go.



Turns out there was another part of the starboard wing that needed a patch.



After that, I started soaking the sheeting for the port wing. I didn't have a big enough container for three feet of balsa, so I improvised with what I did have - some insulation board and an old robe in the rag drawer. I soaked the robe and laid it out on the board, then put the sheeting on the robe...



... and folded the robe over. I poured water over it every day - it sat for several because I didn't have time to get to the sheeting repair.

Old Sep 07, 2012, 07:31 PM
grosbeak is offline
Find More Posts by grosbeak
Illegitimi non carborundum
grosbeak's Avatar
While the sheeting was soaking I cut and glued the two pieces of balsa that would form the new port wingtip.



I traced the outline from the starboard wing as best I could (keeping in mind that I was after a mirror image, not an exact copy) and cut out the VERY rough shape on the band saw.



I plan to work it closer to size then, once the sheeting is done, attach it to the wing before doing the final shaping.
Old Sep 07, 2012, 07:38 PM
grosbeak is offline
Find More Posts by grosbeak
Illegitimi non carborundum
grosbeak's Avatar
Back to the wing sheeting. After it sat for a few days I took it out of the robe and trimmed it to length. It was certainly saturated.



After the starboard wing repair I had decided to try a different method that wouldn't require a joint at the leading edge. So I marked a centre line on the wing and the sheeting...



... pinned it in place...



... and placed magazines to shape it.



I'll leave that for a couple of days.
Old Sep 20, 2012, 09:42 AM
grosbeak is offline
Find More Posts by grosbeak
Illegitimi non carborundum
grosbeak's Avatar
In the meantime, that other patch on the starboard wing has been sanded flush.



The shape of the wingtip has also been refined, both to the contour of the wing...



... and the wingtip itself.

Old Sep 22, 2012, 03:29 PM
grosbeak is offline
Find More Posts by grosbeak
Illegitimi non carborundum
grosbeak's Avatar
It's been a while and a lot has been done. The port wing leading edge got finished.



The upper sheeting was installed.



And I patched some sheeting damage.



Old Sep 22, 2012, 03:33 PM
grosbeak is offline
Find More Posts by grosbeak
Illegitimi non carborundum
grosbeak's Avatar
Another impact hole was patched.



Some sheeting errors I made got patched too.





Old Sep 22, 2012, 03:37 PM
grosbeak is offline
Find More Posts by grosbeak
Illegitimi non carborundum
grosbeak's Avatar
I also fibreglassed a few spots.








Next up - working the port wingtip into shape.
Old Sep 29, 2012, 07:37 AM
grosbeak is offline
Find More Posts by grosbeak
Illegitimi non carborundum
grosbeak's Avatar
I was apprehensive about shaping the port wingtip because of the amount of wood that had to be removed. In the end I did almost all of the shaping with a block plane.



It's not completely finished - but so far I'm happy with the results.



I wasn't happy with the sheeting on the upper surface of the port wing, however, so I decided to reinforce it.



Old Oct 01, 2012, 10:17 AM
grosbeak is offline
Find More Posts by grosbeak
Illegitimi non carborundum
grosbeak's Avatar
This was a good time to start filling some gaps. I got some palette knives from Lee Valley Tools...



... and some filler from my LHS.



After that it was a matter of experimenting with the mix...



... and trying it out.

Old Oct 01, 2012, 12:27 PM
BJM-Maxx is offline
Find More Posts by BJM-Maxx
Registered User
BJM-Maxx's Avatar
Interesting thread. When you patch with fiberglass, how will you finish that surface for when the covering goes on so you don't see the glassed area?

Also, what weight of glass cloth did you use, it looks very light. Do you use a special resin?
Old Oct 02, 2012, 10:27 AM
grosbeak is offline
Find More Posts by grosbeak
Illegitimi non carborundum
grosbeak's Avatar
Quote:
Originally Posted by BJM-Maxx View Post
Interesting thread. When you patch with fiberglass, how will you finish that surface for when the covering goes on so you don't see the glassed area?
It's a trainer - I'm not too worried about perfection under the covering.

Quote:
Also, what weight of glass cloth did you use, it looks very light. Do you use a special resin?
It's 1/2 oz cloth coated with a solution of 5 mL of 30 minute epoxy diluted with 1 ml of 99% isopropyl alcohol. The fiberglass is mostly for surface strength - all of the patched sections were repaired with cabinetmaker's glue before glassing.
Old Oct 04, 2012, 10:11 AM
grosbeak is offline
Find More Posts by grosbeak
Illegitimi non carborundum
grosbeak's Avatar
I must have shaped the ribs on the starboard wing incorrectly, because the sheeting on the top of the wing was recessed from the original sheeting. At first I figured I could fill it with the Model Lite but an experiment showed it would be way too much filler. So, I went with a different approach.



Once the glue cured, I taped up the surrounding sheeting to protect it. Thanks for the tip, Dave!



After a lot of sanding, the new section of the wing is flush with the old.

Old Oct 04, 2012, 09:52 PM
seattlebuoy is offline
Find More Posts by seattlebuoy
Registered User
seattlebuoy's Avatar
Thanks for the details pics. Will be good for reference. Taping the surround areas is a neat trick. Should have thought of that on my Reactor repair. Block planes are awesome for removing large amounts of balsa without a big mess. Amazing how repairable these are and if smooth, not readily discernible under the covering.
Old Oct 11, 2012, 07:28 PM
grosbeak is offline
Find More Posts by grosbeak
Illegitimi non carborundum
grosbeak's Avatar
Quote:
Originally Posted by seattlebuoy View Post
Taping the surround areas is a neat trick
Props for that go to Dave, the manager at my LHS. Thanks again Dave!


Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
For Sale Hobbistar 60 select rtf ROBERT.S Aircraft - Fuel - Airplanes (FS/W) 1 Dec 18, 2012 12:22 PM
For Sale I HAVE A NIB hobbistar 60 trainer,. TODDRAPONI518 Aircraft - Fuel - Airplanes (FS/W) 2 Aug 06, 2009 12:59 PM
Sold Hobbistar 60 trainer - $50 local pickup Houston Dukester Aircraft - Fuel - Airplanes (FS/W) 3 Jul 15, 2009 05:51 PM
For Sale .60 size hobbistar 60 mk2 trainer heli_seeker Aircraft - Fuel - Airplanes (FS/W) 1 Aug 26, 2005 03:29 PM
Sale: Hobbistar 60 Trainer and Goldberg Tiger 60 (unfinish) DerrickT Aircraft - Fuel - Airplanes (FS/W) 0 Mar 31, 2004 04:55 PM