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Cox Engine of The Month
B-25 repaired
Page 1 of 1
B-25 repaired
I finally repaired the B-25 for my flying buddy.The controls were quite a mess. The builder twisted the solid music wire leadouts and soldered them. The twists were done tight and nicely done. There was no need to solder them. The solder wasn't cleaned properly and bad oxidation took place which was binding the controls on the bellcrank. The same was done on the outside terminations and the rust on the leadouts were binding in the brass exit tubes badly. This took a lot of sanding and working the controls in and out for a hour. This plane had many tears in the silkspan. One thing I noted with these tears was that some of the were victim of being handled. I removed the silkspan and sheeted the top wing between fuse and engine nacelle so that no forefingers and thumbs were going to tear it again.
I don't know what the original was painted with. I noted that dope didn't attack the finish so I opted for dope. I mixed the olive drab and blue and was WAAAAY off on both colors. There was nothing I did that enabled me to match the color no matter what colors I mixed. Dope isn't water colors and the colors don't react as one would think. I settled on what I did and I'm certain my friend will have no problems with my repair. You won't see at 60 mph.
![B-25 repaired Dscn3214](https://i.servimg.com/u/f16/19/68/84/08/dscn3214.jpg)
engines were taken apart and gone through. I test ran both and bolted them back on. I was somewhat surprised to see that one was a car engine with the big shaft and prop adapter Paint not a perfect match but it is what it is. It looks good to me
I don't know what the original was painted with. I noted that dope didn't attack the finish so I opted for dope. I mixed the olive drab and blue and was WAAAAY off on both colors. There was nothing I did that enabled me to match the color no matter what colors I mixed. Dope isn't water colors and the colors don't react as one would think. I settled on what I did and I'm certain my friend will have no problems with my repair. You won't see at 60 mph.
![B-25 repaired Dscn3214](https://i.servimg.com/u/f16/19/68/84/08/dscn3214.jpg)
![B-25 repaired Dscn3216](https://i.servimg.com/u/f16/19/68/84/08/dscn3216.jpg)
Ken Cook- Top Poster
- Posts : 5527
Join date : 2012-03-27
Location : pennsylvania
Re: B-25 repaired
Looks good Ken
akjgardner- Diamond Member
Posts : 1507
Join date : 2014-12-28
Age : 64
Location : Greensberg Indiana
Re: B-25 repaired
Looks good to me too , do all B25s have offset in the inter engine ? Alot of work with the controls glad you got it straightened out !
![Very Happy](https://2img.net/i/fa/i/smiles/icon_biggrin.png)
getback- Top Poster
Posts : 10238
Join date : 2013-01-18
Age : 66
Location : julian , NC
Re: B-25 repaired
Nice work Ken, Mechanically sound is first priority….. Cosmetics look just fine for this worker bee that still flies….. I’m sure your flying buddy is appreciative….
rdw777- Diamond Member
Posts : 1421
Join date : 2021-03-11
Location : West Texas
Re: B-25 repaired
Thanks for the positive reinforcement. As far as offset is concerned, I don't build any models with offset. It's not a good practice. This B-25 has both rudder and engine offset, a perfect recipe for a flying turd. It will be flying sideways going around the circle. However, there's a warp in the wing that I can't remove which is going to have the outboard tip flying high. I was going to tape a quarter to the wing when we fly it.
Ken Cook- Top Poster
- Posts : 5527
Join date : 2012-03-27
Location : pennsylvania
Re: B-25 repaired
Nice job Ken, are you going to have him fly it with counter rotating props? If I could get it going I would fly my p-38 that way. Not a big deal C/L it would fly either way but at least I was imitating the big boys.
rsv1cox- Top Poster
Posts : 10759
Join date : 2014-08-18
Location : West Virginia
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