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Building Tips and technical articles. => Paint and finishing => Topic started by: RC Storick on September 05, 2014, 04:53:41 PM

Title: Polyspan Demo video
Post by: RC Storick on September 05, 2014, 04:53:41 PM: How to apply polyspan demo video

http://youtu.be/xyXJ57Fx38A
Title: Re: Polyspan Demo video
Post by: Gordon Tarbell on September 05, 2014, 06:58:01 PM: Nitrate or Butyrate ? How many coats of dope to the wing structure before sticking down the Poly-span?
Title: Re: Polyspan Demo video
Post by: RC Storick on September 05, 2014, 07:15:33 PM: Quote from: gordon tarbell on September 05, 2014, 06:58:01 PM
Nitrate or Butyrate ? How many coats of dope to the wing structure before sticking down the Poly-span?

I only use Butyrate and 3 coats before covering.
Title: Re: Polyspan Demo video
Post by: Duke.Johnson on September 05, 2014, 10:47:49 PM: Thanks for the video! I just picked up three rolls of polyspan for $10 today.
Title: Re: Polyspan Demo video
Post by: RC Storick on September 06, 2014, 12:04:05 AM: It's great stuff
Title: Re: Polyspan Demo video
Post by: john e. holliday on September 06, 2014, 11:16:53 AM: Another great video. Poly-Span is easy to work with and I too use butyrate dope only.
Title: Re: Polyspan Demo video
Post by: Tim Redelman on September 07, 2014, 09:18:21 AM: Great video ! Answered a lot of questions for me!

Tim
Title: Re: Polyspan Demo video
Post by: WLGeorge on September 11, 2014, 08:56:07 AM: Thank you very much for the video. I watch each and every one. I learn something new each time I watch you.
Title: Re: Polyspan Demo video
Post by: Paul Smith on September 11, 2014, 05:36:39 PM: I put that stuff on two Lightning Streaks for Brodak racing about nine years ago. It's still hanging tough.

As Sparky says, it doesn't like small compound curves. I covered the tips in 2" strips which don't show up 5' away. Wrinkles and bubbles do show up 5' away.
Title: Re: Polyspan Demo video
Post by: bruce finley on September 12, 2014, 06:02:59 AM: Robert, where did you get that big block of foam? Great idea by the way! No dings in wings :D
Title: Re: Polyspan Demo video
Post by: RC Storick on September 13, 2014, 03:38:42 AM: Quote from: bruce finley on September 12, 2014, 06:02:59 AM
Robert, where did you get that big block of foam? Great idea by the way! No dings in wings :D

That is a CVO Harley gas tank shipping package
Title: Re: Polyspan Demo video
Post by: GonzoBonzo on September 22, 2014, 09:22:42 PM: Great video Sparky, and it couldn't have came at a better time. I'm getting ready to cover my first model with Polyspan. I like the idea of overlapping the polyspan where the wing is joined for strength. My only concern would be the wing to fuse joint, especially with profiles. Is the dope, polyspan strong enough to hold the wing when epoxying the wing in a profile? I usually leave a half inch of bare wood for a wood to wood bond.
Title: Re: Polyspan Demo video
Post by: Paul Smith on September 23, 2014, 07:08:37 AM: You point is well taken. When I did smaller profiles (Lightning Streaks) I glued the wing in first and covered the wing quarters separately.

The stuff doesn't bend well. Forget about wrapping the TE and if you wrap the LE allow and inch of more of overlap to have some Polyspan to stick down.
Title: Re: Polyspan Demo video
Post by: proparc on September 23, 2014, 07:37:25 AM: Much needed video and very well done. I personally don't fore see a time when we will not need these important construction videos.
Title: Re: Polyspan Demo video
Post by: Jim Roselle on September 24, 2014, 06:13:41 AM: Great video and very timely as my next project will have a polyspan covered wing. I've always used acetone to thin butyrate when applying silk span or tissue to fuselages. Will acetone work in this application?

Thanks,
Jim
Title: Re: Polyspan Demo video
Post by: RC Storick on September 24, 2014, 09:50:18 AM: Quote from: Jim Roselle on September 24, 2014, 06:13:41 AM
Great video and very timely as my next project will have a polyspan covered wing. I've always used acetone to thin butyrate when applying silk span or tissue to fuselages. Will acetone work in this application?

Thanks,
Jim

I'm sure it would but I dont use anything but thinner.
Title: Re: Polyspan Demo video
Post by: john e. holliday on September 25, 2014, 02:50:38 PM: In my experience, acetone is great for clean up and loosing up brush bristles that didn't cleaned all the way. Using it as a thinner results in the dope drying too fast. Use dope thinner in dope. I have used the automotive thinner in dope with good results.