#41
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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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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 Last edited by blackshire : 07-18-2022 at 08:36 PM. |
#42
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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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It is well past time to Drill, Baby, Drill! If your June, July, August and September was like this, you might just hate summer too... Please unload your question before you ask it unless you have a concealed harry permit. : countdown begin cr dup . 1- ?dup 0= until cr ." Launch!" cr ; Give a man a rocket and he will fly for a day; teach him to build and he will spend the rest of his days sanding... |
#43
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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 |
#44
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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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If it flies, I can crash it! |
#45
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__________________
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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