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  #41  
Old 07-18-2022, 08:13 PM
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blackshire blackshire is offline
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Quote:
Originally Posted by dlazarus6660
I was going to o recommend R/CGroups of which I'm a long time member.
There is a plans business from the UK that presents free plans of most model aircraft.
You download them on your thumb device and bring it to a printing place.
I'll try to find it.
Thank you. I don't think there are any such "foam fabrication firms" here in town (I'll look and ask around, just in case), but I'm sure there are ones online that make CNC-machined--or maybe 3D printed--molds for these kinds of EPO or EPP expanded foam items (including model gliders), and do the foam-molding as well. I have no idea how much it costs (or what the minimum numbers of units might be), but I'll find out! :-) In this connection:

When--in the early 1990s--I was looking to have BT-5 size (regular) injection-molded, low-pressure injection-molded, or rotationally-molded, styrene 5:1 tangent ogive nose cones made for my Nova Hobbies ASP scale kits (which had turned-balsa nose cones), the cheapest option I could find locally (in Miami, at that time) was a single-cavity, tool steel mold. It would have cost $5,000, which I couldn't afford (but it could have cast 100,000 or more styrene nose cones), but:

I told the company I simply couldn't afford the tool steel mold, and they recommended a shorter-life--but much cheaper (just a few hundred dollars) mold--made of a rather "soap-like" plastic (Delrin, I think; they said that plastic funnels and similar items are sometimes cast in these molds). They didn't make such molds themselves, but suggested other Miami plastic molders who did. Maybe, if the most common method is too expensive for me, there is an analog of the shorter-life molds, regarding expanded foam (EPO and/or EPP) molding.
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http://www.lulu.com/product/cd/what...of-2%29/6126511
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Last edited by blackshire : 07-18-2022 at 08:36 PM.
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  #42  
Old 07-19-2022, 08:03 AM
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Bill Bill is offline
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Laser cutting parts out of foam board and hot gluing them together has been a thing in the R/C aircraft scene.


Bill
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  #43  
Old 07-20-2022, 09:39 AM
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blackshire blackshire is offline
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Quote:
Originally Posted by Bill
Laser cutting parts out of foam board and hot gluing them together has been a thing in the R/C aircraft scene.


Bill
I know; so has been (and is) "glassing" foam wing, tail, and fuselage 'cores' (including with thin-gauge carbon or Kevlar cloth and 'foam-friendly' epoxy, instead of with glass cloth; this is done with some full-size homebuilt aircraft too, such as Burt Rutan's VariEze, Quickie, Q2, and Solitaire homebuilt canard airplanes and sailplanes). I was thinking in terms of a model hand-launched (and model rocket B/G) glider that--like the original model shown in G. Harry Stine's "Handbook of Model Rocketry"--would be molded, out of EPO or EPP expanded foam, like (to give but one example, see: https://dream-flight.com/ ) Dream-Flight's R/C gliders.
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
NAR #54895 SR
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  #44  
Old 08-28-2022, 07:24 PM
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dlazarus6660 dlazarus6660 is offline
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Outerzone or OZ has plans you can download for free.
Put them on a thumb drive and take to a printer like Staples.
There are thousands of plans and the search engine is not the best.
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  #45  
Old 08-31-2022, 08:01 PM
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blackshire blackshire is offline
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Quote:
Originally Posted by dlazarus6660
Outerzone or OZ has plans you can download for free.
Put them on a thumb drive and take to a printer like Staples.
There are thousands of plans and the search engine is not the best.
Thank you for letting us know! I'll try that.
__________________
Black Shire--Draft horse in human form, model rocketeer, occasional mystic, and writer, see:
http://www.lulu.com/content/paperba...an-form/8075185
http://www.lulu.com/product/cd/what...of-2%29/6122050
http://www.lulu.com/product/cd/what...of-2%29/6126511
All of my book proceeds go to the Northcote Heavy Horse Centre www.northcotehorses.com.
NAR #54895 SR
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