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How to build model airplanes >> Wrecks and Repairs >> repairs galore
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Message started by JIM on Jan 25th, 2013 at 9:17am

Title: repairs galore
Post by JIM on Jan 25th, 2013 at 9:17am
[smiley=thumbsup.gif]  Well Cloudsters its time to be cuttin' like a surgeon.  I've got six or more planes that require some TLC ranging from war-weariness to physical damage.  I'll have a pic of each one later on today and then tell the story of what was wrong and how i dealt with it.  All planes did fly at one time at their career and some are several years old too.

JIM ;D

Title: Re: repairs galore
Post by Tom Akery on Jan 25th, 2013 at 1:23pm
Looking forward to the "IRAN"(Inspect & Repair As Needed) report soon! ;D 8-)

Tom

Title: Re: repairs galore
Post by JIM on Jan 25th, 2013 at 2:48pm
ok I've got five Planes:

1) a p40 with damage to tissue and underbelly.  It also has a nasty habit of diving which can be fixed by raising the elevators.

2) a piper cub that needs a proper nose block and new elevators. Will also need rebalasting

3) a Cub that needs a wing.

4) A mustang that needs its tail feathers reattached and possible ballasting

5) a war weary FROG Speedy that will need new tissue.

JIM

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Title: Re: repairs galore
Post by Tom Akery on Jan 25th, 2013 at 3:24pm
Nice fleet.  Always takes some maintenance to keep em flying!! [smiley=thumbsup.gif]

Tom

Title: Re: repairs galore
Post by JIM on Jan 25th, 2013 at 7:09pm
I started with the mustang (J Bell designer  See my P51Built at HIPPOCKETAERONAUTICS)  There was tissue damage and the tail separated.  The Repair was done in steps
!) separate tail from fuselage and cut out torn tissue
2) repair tail piece into solid block
3) replace tissue
4) lay out 1/16 sheet insert to fuselage to receive tail
5) checking alignment, glue tail to fuselage.


now I have to test fly.

JIM ;D

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Title: Re: repairs galore
Post by Tom Akery on Jan 25th, 2013 at 9:19pm
well done...wishing you luck on re-trimming... ;) 8-) [smiley=thumbsup.gif]

Tom

Title: Re: repairs galore
Post by thymekiller on Jan 26th, 2013 at 4:53pm
I like that tail arrangement.  [smiley=thumbsup.gif]


Title: Re: repairs galore
Post by JIM on Jan 27th, 2013 at 9:33am
my next repair is the FROG Speedy.  An excellent flyer at 18 inch w/s.  The FROG plan is only 12 inches but if you blow it up anf covert to Stick and tissue or mixed(stick and sheet you will have a great flyer. It looks like a pseudo SPITFIRE but is easier to trim.

The first pic shows Some tissue damage as well as war weariness.  I decided to sand it and apply new tissue.

The First job was to completely strip the fuselage and lower right wing (pics 2/3)  The A/c is sanded to bare balsa (getting rid of old tissue and glue.  any thin or broken stringers are replaced at this stage.  The A/c is then sheeted for strength and weight adjustment and finally re-covered.

I did test it and there was a sharop turing to the left.  I will have to adjust the thrust lines when I fly iy out.  At his stage of the game it owes me nothing,.  This frame is a couple of years old.

JIM ;D
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Title: Re: repairs galore
Post by thymekiller on Jan 27th, 2013 at 3:00pm
Looks like your having fun over there!!

Gotta ask, what does A/c mean? Thats a term I dont think I know about.

Title: Re: repairs galore
Post by Tom Akery on Jan 27th, 2013 at 4:02pm

thymekiller wrote on Jan 27th, 2013 at 3:00pm:
Looks like your having fun over there!!

Gotta ask, what does A/c mean? Thats a term I dont think I know about.


I'm betting it means Aircraft????

Tom

Title: Re: repairs galore
Post by JIM on Jan 29th, 2013 at 9:34am
[smiley=thumbsup.gif] right as rain tom

Now here's something for u all.  @ weeks ago I bought a certain technology stock, a former star that supernovaed few years back.  I ha dreamed of buying it way back when but it was always too much to pay.  well it was in the toilet, circling the drain when it announced it finally had its potential act together and like he phonix was rising again from its own ashes.  So i bought it.  Two weeks later I sold it and bought a new Nikon Camera from the proceeds  [smiley=thumbsup.gif] [smiley=thumbsup.gif] [smiley=thumbsup.gif]

here are the results of photos taken with my new camera and fotoes from my old one for comparison.  they show my next project the repair of my P 40. ;D

i THINK I MADE A GOOD CHOICE TO REPLACE MY CAMERA DON'T U?
p40_test_pic_1_nikon_001.JPG (39 KB | )
p40_test_pic_1_nikon_002.JPG (41 KB | )
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Title: Re: repairs galore
Post by Tom Akery on Jan 29th, 2013 at 3:34pm
Very nice indeed...and congrats on the good fortune.

Keep up the good work.

Tom

Title: Re: repairs galore
Post by JIM on Jan 31st, 2013 at 6:54am
some more repair to the p40

I stripped out the damaged areas, the replaced the broken formers, restrung them and replaced the tissue.  This is seen in the accompanying photos.  My big problem for this plane is trimming it.  It will need some up elevator otherwise she dives into the ground.  We shall see.

Jim ;D
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Title: Re: repairs galore
Post by Tom Akery on Jan 31st, 2013 at 4:21pm
You might check for any warps on your wings and stab.  Also have you checked the incidence of the main wing to the horizontal stab?

Where does the plane balance?  A good starting place is approximately 25% to 30% back from wing leading edge.  If it remains extremely heavy towards the nose you may have to add some weight to the tail.

You might want to check out these threads on flight trimming.... http://www.stickandtissue.com/cgi-bin/yabb2/YaBB.pl?board=trimming

Good luck Jim...

Tom

Title: Re: repairs galore
Post by JIM on Feb 2nd, 2013 at 8:10am
got a couple of good flights out of SPEEDEE and a couple of duds.  More trimming I suppose.

Title: Re: repairs galore
Post by thymekiller on Feb 4th, 2013 at 7:10pm
It takes awhile to get trimmed out. The smallest thing can be the biggest difference.
Keep us posted.   

Title: Re: repairs galore
Post by JIM on Feb 11th, 2013 at 1:23pm
my next effort at repair was a John Bell designed Piper Cub for Dave Reese.  I built this cub 2 or 3 years ago and it flew nice.  It had been recovered several times and I stripped the tissue aft of the wing.  in doing so I noticed the poor stringers were in poor shape and needless to say the stringers came apart one by one before I even got to the tail where I was going to replace he elevator that broke.  the damage is obvious.  REPAIR CANCELLED.

Well that was easy

JIM [smiley=evil.gif] ;D
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Title: Re: repairs galore
Post by Tom Akery on Feb 12th, 2013 at 2:24am
Looks like you have a good wing still....how tough would it be to build a new fuselage and horizontal and vertical stab if that is broken also.

Too bad the stringers gave up the ghost!

Good luck with the next one...

Tom

Title: Re: repairs galore
Post by thymekiller on Feb 16th, 2013 at 5:43pm
It's always sad when it cant be saved. Got a couple I need to throw away, but cant bring myself to do it.

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