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Old Feb 02, 2011, 08:45 PM
FLYBOYRC40 is offline
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Go Electrics
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Looking real good Jeff.
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Old Feb 02, 2011, 10:01 PM
AIR SALLY is online now
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deltas are cool
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so are you going to glass the plug frist?
Old Feb 02, 2011, 10:04 PM
Lmeano_from_MO is offline
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Fast Jets for Fast times
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Not planning on it, Iím hoping the release will make it pop out ok from the plaster.
Old Feb 03, 2011, 12:15 AM
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deltas are cool
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it's going to be ruff ,you need to seal it with something pva wont work well on foam/spackel ,i would hate to see all the work on the plug messed up ...but if your not going to glass it why not just do it like John morgan does? or are you hopeing to get a few parts out of it . plaster type casts are good at picking up detail...what ever the plug looks like the mold will look like.
Old Feb 03, 2011, 04:04 AM
Arngeir Blakseth is online now
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Senior Member
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I'd definately add a layer of 6 oz. fiberglass to the plug, then it's on with the body filler and sanding, sanding and more sanding to get a nice smooth finish. This way you will have a much tougher and smoother surface. Should make it easier to get the plug to release from the cast as well I think as you can wax it in addition to using PVA.
Old Feb 03, 2011, 05:48 PM
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deltas are cool
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your right if the surface is'nt glass smooth it wil be hard to release it .it just takes a lot of timr to do a cast ,or epoxy tooling .
Old Feb 05, 2011, 10:27 PM
Lmeano_from_MO is offline
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Fast Jets for Fast times
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Rodger / Arngeir,

I have a gallon of 2part epoxy used to encapsulate motor windings I was thinking of coating the foam with it. It is thin and would wick in to the foam pours and would make a hard shell to apply the body filler to. Iím going to try a test first to see if it will work.
Old Feb 06, 2011, 05:44 PM
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deltas are cool
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might work ...i bet it is really hard to sand ...so just seal it with it ...the test piece is a good idea .
Old Feb 09, 2011, 04:23 PM
Ken Lapointe is online now
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Build'em and Crash'em
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Wow, what a great project. Looks great

I think the epoxy will coat the foam ok, but it wont provide much protection from dents. I think you would want to throw at least a layer of glass on there to protect the foam from the hazards of the workshop

Are going to add the ROHR in-flight thrust reverser
Old Feb 10, 2011, 10:11 AM
eatond is online now
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EDF Jet Jam 2017, June 15-18th
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Hi Jeff,
the plug looks great but I don't see the center boards we talked about. How are you planning on splitting the plug?

Dan Eaton
Last edited by eatond; Feb 10, 2011 at 10:27 AM.
Old Feb 10, 2011, 03:02 PM
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Dan,

I lightly glued the foam together at the halves. I will use mylar at the seam before I epoxy coat the foam so it doesnít wick down the split. I will run a long blade and it should split easy. I would like to try some test before I tackle the fuse and wanted to know where you got the Hydrocal?
Old Feb 10, 2011, 03:22 PM
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EDF Jet Jam 2017, June 15-18th
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Hi Jeff,
You can get a 50 pound bag at Krueger's for around $25. They're located right off of I-44.

If you just want to experiment a little you can get a 1 or 2 ound box at Mark Twain for about half that.

Hey, I need to pick up another bag if you want to make a trip together. They're open late on Thursdays or during the day on Saturday but it'll be a zoo on Saturday.

Dan Eaton
Old Feb 10, 2011, 03:33 PM
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Quote:
Originally Posted by eatond View Post
They're located right off of I-44.

Dan Eaton
Dan,

Making a trip south sounds good. I need to get Bobís A7 gear back to you also; it helped to get ideas for mine. Iím also interested in your thoughts about the fuse and the plan.
Old Feb 10, 2011, 07:58 PM
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Advancing the Schmilblick!
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...
Last edited by kcaldwel; Jan 24, 2012 at 05:51 PM.
Old Feb 10, 2011, 10:31 PM
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deltas are cool
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plus one for the face coat ...only way to go for plaster


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