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General control line discussion => Open Forum => Topic started by: Paul Taylor on January 03, 2010, 07:07:33 PM

Title: Cowl - Part 2
Post by: Paul Taylor on January 03, 2010, 07:07:33 PM

OK,
Don't pick it apart too bad.

Here it is.... just a little more sanding, and then put some thin resin on the inside.

I liked the stacked look.

Title: Re: Cowl - Part 2
Post by: Harleyman on January 03, 2010, 07:17:57 PM

It's coming along just fine.
Looks like you lined the holes . . . nice touch.   x:
Very kule.   y1

Title: Re: Cowl - Part 2
Post by: Paul Taylor on January 03, 2010, 07:21:32 PM

yup!
I stole the idea. <=

Title: Re: Cowl - Part 2
Post by: Paul Taylor on January 04, 2010, 10:09:14 AM

Quote from: Ty Marcucci on January 03, 2010, 07:55:52 PM

HI Paul. One little trick I copied from the big boys is to line the edge of the cowl and the mating part of the fuselage with 1/64th ply. Gives it sharp clean edge. Looks very professional. 

Hey Ty,
Got any pictures of the lite ply on a cowl?

Title: Re: Cowl - Part 2
Post by: john e. holliday on January 04, 2010, 10:34:41 AM

The cowl is looking good.

Title: Re: Cowl - Part 2
Post by: Randy Powell on January 04, 2010, 12:19:30 PM

A trick I tried with the latest plane for mating the cowl to plane worked wonderfully. I got the basic fit done and set up the hold downs and such. The I finish sanded the cowl and go it pretty much done. this a glassed the cowl with half ounce fiberglass and epoxy. Sanded it and polished up up to a mirror finish (well, at least a very smooth finish) The surface that faced the plane was also finished very flat and was glassed. Once that was done, I waxed the cowl and shot it with PVA release. then I put Superfil on the mating surface on the plane and bolted the cowl on. I made sure that any gaps along the mating surface were filled and smoothed. Once dry, the cowl popped right off due to the wax and PVA and I ended up with a perfectly mated cowl. Virtually no cowl line.

You do have to insure that you get all the PVA and wax off the cowl, cleaning it well and re-sanding it after your done, but it sure worked well. It's a trick I'll do again.

Title: Re: Cowl - Part 2
Post by: Leo Mehl on January 05, 2010, 04:17:10 PM

Quote from: Randy Powell on January 04, 2010, 12:19:30 PM

A trick I tried with the latest plane for mating the cowl to plane worked wonderfully. I got the basic fit done and set up the hold downs and such. The I finish sanded the cowl and go it pretty much done. this a glassed the cowl with half ounce fiberglass and epoxy. Sanded it and polished up up to a mirror finish (well, at least a very smooth finish) The surface that faced the plane was also finished very flat and was glassed. Once that was done, I waxed the cowl and shot it with PVA release. then I put Superfil on the mating surface on the plane and bolted the cowl on. I made sure that any gaps along the mating surface were filled and smoothed. Once dry, the cowl popped right off due to the wax and PVA and I ended up with a perfectly mated cowl. Virtually no cowl line.

You do have to insure that you get all the PVA and wax off the cowl, cleaning it well and re-sanding it after your done, but it sure worked well. It's a trick I'll do again.

Roy DeCamera does this with balsa and they are really good fits. HB~> HB~>

Title: Re: Cowl - Part 2
Post by: Randy Powell on January 05, 2010, 08:56:44 PM

Gee, thanks Leo.   na#

Title: Re: Cowl - Part 2
Post by: Gary Anderson on January 05, 2010, 09:28:17 PM

Hi guys,

This is one of my cowls for the Stiletto, just covered with silkspan and dope. Than I shot a coat of Dupli-color Clear.