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-   -   Wheel pants restoration (https://www.rcuniverse.com/forum/tips-techniques-180/11340639-wheel-pants-restoration.html)

grosbeak 12-22-2012 10:50 AM

Wheel pants restoration
 
When I got my new-to-me SBach 342 in the fall of the 2012 there were a few things I wanted to do to ready it for the 2013 season. On the list of cosmetics were the wheel pants which had seen better days.

http://farm9.staticflickr.com/8206/8...e61c960f_z.jpg

On of the first things I noticed was a problem with the alignment.

http://farm9.staticflickr.com/8345/8...17347fa1_z.jpg

I took them off to give them an acetone soak. An unused toilet brush was great for removing unused paint.

http://farm9.staticflickr.com/8212/8...b3518e8c_z.jpg

Lo and behold, a nice white gelcoat appeared.

http://farm9.staticflickr.com/8345/8...992ea249_z.jpg

grosbeak 12-22-2012 11:02 AM

RE: Wheel pants restoration
 
The next step was to correct the alignment. After careful consideration I determined the starboard pant was out of whack, so I marked the new hole...

http://farm9.staticflickr.com/8197/8...ca7c61f7_z.jpg

filled in the old one...

http://farm9.staticflickr.com/8073/8...5c72e724_z.jpg

and drilled out the new one.

http://farm9.staticflickr.com/8484/8...9acb2027_z.jpg

That did the trick.

http://farm9.staticflickr.com/8220/8...f27fa7b9_z.jpg

grosbeak 12-22-2012 11:10 AM

RE: Wheel pants restoration
 
To complete the starboard wheel pant alignment I pressed a new blind nut into the hole and epoxied it in.

http://farm9.staticflickr.com/8357/8...c50f3f0f_z.jpg

The original designed had the axle holes sticking out of the outer sides of the wheel pants. I didn't want that, so I fabbed some sockets for the tips of the axles.

http://farm9.staticflickr.com/8351/8...7d40df4e_z.jpg

They were lined up and epoxied into the inside of the pants.

http://farm9.staticflickr.com/8352/8...6f0f05f7_z.jpg

grosbeak 12-22-2012 11:20 AM

RE: Wheel pants restoration
 
The replacements for the beat-up main gear were 1/4" larger, which required that the wheel pant openings be enlarged a bit. I traced the shape of the openings with a soft pencil and imported them into a drawing application to make templates for the new cutouts.

http://farm9.staticflickr.com/8074/8...6d9f3df6_z.jpg

I cut out four templates - two for each leading and trailing edge. I used each one in turn to trace the new outline onto the part...

http://farm9.staticflickr.com/8076/8...2fd65a45_z.jpg

Grabbed the dremel with the sanding drum...

http://farm9.staticflickr.com/8504/8...ca8ebd27_z.jpg

And enlarged the opening.

http://farm9.staticflickr.com/8504/8...d77beb95_z.jpg

grosbeak 12-22-2012 11:28 AM

RE: Wheel pants restoration
 
With the enlargements the wheels fit just right.

http://farm9.staticflickr.com/8337/8...2e25d022_z.jpg

Back to filling the axle holes on the outside of the pants. I cut a couple of small lengths off a dowel and epoxied them in place.

http://farm9.staticflickr.com/8481/8...b713b036_z.jpg

Once the epoxy cured, out came the trusty flush cut saw.

http://farm9.staticflickr.com/8478/8...6cf57bc7_z.jpg

I filled some other chips in the outer coat with epoxy and got everything sanded down.

grosbeak 12-22-2012 11:45 AM

RE: Wheel pants restoration
 
When both of the pants had their low spots filled and had been progressively sanded to 220 grit and thoroughly washed and dried, I set up a makeshift painting booth with an old box fan as an exhaust.

http://farm9.staticflickr.com/8500/8...e928a8cd_z.jpg

Another fan at the open shop window was a big help.

http://farm9.staticflickr.com/8495/8...86700c0c_z.jpg

Lessons learned about painting in the house:

- It can be very smelly
- My wife does not like the faint smell of paint
- If the furnace is on, the cold air intake in the basement will suck up the fumes and spread them all over the house
- My wife REALLY does not like the strong smell of paint

Best practices:

- Paint late - not long before bed
- Shut off the furnace
- Open the shop window
- Turn on both fans
- Paint
- Wash up
- Wait until the smell is mostly gone from the shop
- Turn off both fans
- Shut the shop window
- Turn on the furnace. By this time it's in night mode and is set about 4ºC lower than the rest of the house so it won't come on til morning.

After the first coat a lot of sanding scratches were visible through the paint. I finish sanded both pants all over with wet 600 grit and that made a big difference. I worked my way up to five coats of gloss black and I'm very pleased with the result.

http://farm9.staticflickr.com/8224/8...3d56b858_z.jpg

http://farm9.staticflickr.com/8211/8...607cd422_z.jpg

grosbeak 12-22-2012 11:50 AM

RE: Wheel pants restoration
 
And on the plane:

http://farm9.staticflickr.com/8501/8...8105acaa_z.jpg

http://farm9.staticflickr.com/8222/8...4169f2d1_z.jpg

http://farm9.staticflickr.com/8361/8...f86c65e4_z.jpg

LesUyeda 12-23-2012 07:56 AM

RE: Wheel pants restoration
 
"Best practices:

- Paint late - not long before bed
- Shut off the furnace
- Open the shop window
- Turn on both fans
- Paint
- Wash up
- Wait until the smell is mostly gone from the shop
- Turn off both fans
- Shut the shop window
- Turn on the furnace. By this time it's in night mode and is set about 4ºC lower than the rest of the house so it won't come on til morning. "

Move to Southern California, and don't worry about any of that stuff:-))))))))))))))

Les

Twin_Flyer 12-27-2012 12:39 PM

RE: Wheel pants restoration
 
Just wondering is it safe to clean paint off any fiber glassed part using aceatone?

thanks
Bill S.

sensei 12-27-2012 12:56 PM

RE: Wheel pants restoration
 


ORIGINAL: Twin_Flyer

Just wondering is it safe to clean paint off any fiber glassed part using aceatone?

thanks
Bill S.
Acetone will not damage polyester or epoxy parts, so wash away...

Bob

sensei 12-27-2012 12:57 PM

RE: Wheel pants restoration
 
Double post, my bad.

Bob

TomCrump 12-28-2012 03:02 AM

RE: Wheel pants restoration
 


ORIGINAL: Twin_Flyer

Just wondering is it safe to clean paint off any fiber glassed part using aceatone?

thanks
Bill S.
I'd be wondering about how safe it would be to paint near a fan that isn't rated as explosion proof.

LesUyeda 12-28-2012 07:38 AM

RE: Wheel pants restoration
 
"Acetone will not damage polyester or epoxy parts, so wash away... "

I will question that. Seems to me that when we were building my son's surfboards, and his Long-EZ (full size), acetone was what we used for cleanup, to get the resin off of everything.

Better test first.

Les


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