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Old Dec 03, 2003, 04:35 PM
Backyard Bomber
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Joined May 2002
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Sturdyboard for micro models?

Hi everyone, I'm askinf for a JMP rx and accesories for Christmas and was wondering if stripped Stturdyboard would be suitable for these light weight models. it is about 3/16" when ready. It is quite lightweight, but would it be too thick for the tail feathers?
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Old Dec 03, 2003, 04:39 PM
in persuit of low wing loading
Gordon Johnson's Avatar
Boston, Mass
Joined May 2001
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Just to give you a comparison, generally 1/32 contest balsa is used for the tail when balsa is used. I often use 2mm Depron for tail surfaces, and sometimes sand that down to 1mm. Weight is everything.

Gordon
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Old Dec 03, 2003, 04:43 PM
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That is close to 5mm - much too thick (read heavy) for micro models IMHO. I would consider 3mm Depron too heavy for anything but the wings. Don't despair though, you can sand the foam thinner. I use a cheap oscillating sander for thinning down sheets.

Michael
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Old Dec 03, 2003, 04:46 PM
Backyard Bomber
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I may still make a "universal" fuselage out of it so I may try different wing/tail configurations out of balsa wood. I really need a hotwire bow

what other materials are there that I could use (aside from balsa) to make micro tails/wings out of?

I do have acess to balsa and cf rod, but i'm just wondering what is commonly available (in the US )
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Old Dec 03, 2003, 05:27 PM
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Dan Leonard's Avatar
Lenexa KS USA
Joined Jun 2001
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bsmooth
For your micro tail feathers go to grocery store and buy a package of styrofoam plates. Not trays. Round plates, the flat part should be large enough and only about 1-1.5mm thick. I think it's the Hefty brand that has the larger 10 inch. The always save brand is smaller but a little lighter foam. For less than three dollars you should be able to make fifty tail feathers. For the wings go to Depron USA and get a couple sheets of 2mm Depron and you should be set for the winter. If that doesn't work then wrap the 2mm depron around your favorite drink and serve lunch to your flying mates with the plates.
Dan
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Last edited by Dan Leonard; Dec 03, 2003 at 05:32 PM.
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Old Dec 03, 2003, 05:40 PM
Backyard Bomber
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hey that is a good idea, well thought! I could probable even use it for wings if I made a four-panel polyhedral
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Old Dec 03, 2003, 06:15 PM
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You can try it for wings but it doesn't like to be rolled. It was heat crushed into the flat shape.
Dan
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Old Dec 03, 2003, 07:20 PM
Backyard Bomber
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I planned of using the heat gun to flex shape it
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Old Dec 03, 2003, 08:49 PM
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The sturdy board or art board seems close to depron.
Maybe you can hotwire cut some to 1mm or 2mm.
It might come out better shape than the foam plates as only the outer surface will have seen much heat. If you cut it quick enough maybe it will be good with a little sanding. I'm not sure though as I am a foam newbie.

Billy
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Old Dec 03, 2003, 09:14 PM
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You can also score (under side) the styro plates to make an airfoil shape. Just smear a bit of foam-safe CA glue over the score marks and hand-form or use tape to hold the shape until set. I have made several models this way including this one.


-John
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Old Dec 03, 2003, 09:59 PM
Backyard Bomber
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Interesting model there Inari, is the fuselage made out of plate foam as well?
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Old Dec 04, 2003, 12:00 AM
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Yep, all Hefty foam plate: http://www.rcgroups.com/forums/showt...ghlight=barbar
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