Post by: Perry Rose on June 02, 2018, 01:29:06 PM
I've been scratch building a Super Chief and figured that it needed doped on covering. I used Polyspan as it's heat shrinkable and I have the tools for that. I dusted the edges with spray glue to hold the polyspan in position so I could paint around the perimeter. After covering the fin/rudder, elevators and flaps and working around the corners and putting a bit too much heat on the right elevator half I tried using the monokote iron to shrink the stuff. It worked just fine with the temp set a tad over 300 degrees. Then I used the iron to heat the covering forming it around the tips and that went very well. The heat softened the primer coats of clear and held the material in place until the the over coats firmed up. I used one piece of polyspan on the parts wrapping it around the leading edge and securing it to the trailing edge. Getting the stuff to bend around the 90 degree angle on the inboard end of the flaps and elevators is a pain but like monokote I ran the iron along just touching the edge and the polyspan bent nicely into position and stayed until the paint firmed up. I still have the wing to do then all the fill coats. I still don't like covering this way. I'm using Rustoleum 2X clear spray paint poured into a coffee can instead of dope.
Post by: Bootlegger on June 02, 2018, 02:25:32 PM
PICTURE'S ?? We want pictures... #^ #^ #^ #^ #^ n~ n~ n~
Post by: James Holford on June 02, 2018, 06:34:59 PM
I don't like to use any covering that has to be doped down. It just takes too long.Hell you have brought it to the field and covered it without tool with the heat we had
I've been scratch building a Super Chief and figured that it needed doped on covering. I used Polyspan as it's heat shrinkable and I have the tools for that. I dusted the edges with spray glue to hold the polyspan in position so I could paint around the perimeter. After covering the fin/rudder, elevators and flaps and working around the corners and putting a bit too much heat on the right elevator half I tried using the monokote iron to shrink the stuff. It worked just fine with the temp set a tad over 300 degrees. Then I used the iron to heat the covering forming it around the tips and that went very well. The heat softened the primer coats of clear and held the material in place until the the over coats firmed up. I used one piece of polyspan on the parts wrapping it around the leading edge and securing it to the trailing edge. Getting the stuff to bend around the 90 degree angle on the inboard end of the flaps and elevators is a pain but like monokote I ran the iron along just touching the edge and the polyspan bent nicely into position and stayed until the paint firmed up. I still have the wing to do then all the fill coats. I still don't like covering this way. I'm using Rustoleum 2X clear spray paint poured into a coffee can instead of dope.
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Post by: Dennis Toth on June 03, 2018, 06:50:11 AM
Are you using dope as the undercoat/adhesive or Rustoleum 2X? Most have advised using nitrate dope to adhere and fill. I am doing a Barnstormer and at the point of covering the wing trying to make the decision about what to cover with. You indicated that with the iron @ 300 you could heat form around the wing tip, was this part of the main wing covering or separate? Polyspan is suppose to take less dope to fill than silk or silkspan and therefore less weight. What are you planning on using to fill with?
Best, DennisT
Post by: Perry Rose on June 03, 2018, 10:16:30 AM
Gil, if you want pictures go to https://perrystoys.blogspot.com/
Post by: john e. holliday on June 03, 2018, 05:37:27 PM
Post by: Perry Rose on June 11, 2018, 02:32:25 PM
Post by: Steve Helmick on June 11, 2018, 03:26:01 PM