I am looking for someone to make the molds for RC Glider wings. This will be for multiple offs. I can get the CAD drawings for the wings. There will be a right and left wing in the 3' - 4' length each.
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I am looking for someone to make the molds for RC Glider wings. This will be for multiple offs. I can get the CAD drawings for the wings. There will be a right and left wing in the 3' - 4' length each.
Cabreeling,
Please send me your CAD drawings and mold specification for quote.
we are professional mold making company.
Best Regards,
Michael
[email protected]
What type of mold are you looking for? We may be interested.
Something that will be able to allow multiple wings to be pulled. I need something economical as this will be hobby/club project. May want to have fuselage mold made as well.
Does your cad data have the airfoil curves?
Do you need to develop 3-D contour model?
Is it a NACA formula curve?
Check this site:
http://www.aerospaceweb.org/question...ls/q0100.shtml
I am offering wing lofting experience and mold making experience.
(former aerospace, complex wings or simple)
Aluminum mold? multi-cavity? what material molded?
Note: this can get very complex and costly.
I am looking for the most economical mold type available. Airfoil is UIUC SD7032 with root of 8.5". Any idea what cost might be (rough idea)?
Wild guess would be 4.5-7.0 Thou.
80-120 hours, start to delivery.
Anyone else ready to guess?
This is an expensive hobby.
I will have to re-think the plan.
cheaper to vacuum form the parts. unless you want to make a ton of these.
How many parts do you need and what material do you want to make them out of?
I'll kindly suggest this. Yer doin' it wrong.
Instead of looking at a machined mold for a limited use, look into making your own mold out of glass with appropriate wood reinforcements.
You need to make at least one "Master" to use to make the mold, then build your mold from there.
A friend of mine was building small electric pylon racers in his basement with this method, and I have built, among other things, aircraft wheel pants and a couple sets of special purpose sinks (for alodine treating aircraft parts) using this method.
It will bring the costs down to something that is not prohibitive. Mostly it's just about the same labor as building a model.
Cheers
Trev
Hi I'm a long time out of serious model aircraft stuff, but still in touch with what's happening.
Mike F( zone member,) built his own machine for ( mostly ) glider wing work, and the current build style seems to be pre-preg carbon over fully machined Rohacell cores. He's done cores for C/l Speed & T/R, F3B, Helicopter blades etc,
and the core machining is quick enough that he can sell them without scaring the users.I know He's also machined female moulds for pressing the carbon skins.
I'd go find the competitive F3B flyers, ask how they're getting stuff done. I can't imagine they're just marking time with old build methods.
I always found fellow modellers ready to help and collaborate with tech.problems when I was competing.
Hope you find the same,
Regards,
John
I've got no direct experience in model aircraft, but it seems to me using a mold for each half of the wing, then bonding the halves together is unnecessarily complex and not the ideal solution, in terms of strength and weight savings.
Although it's a more complex procedure, I would machine some sort of foam core - Rohacell probably makes an ideal core material for this project, although I would first try polystyrene as it would be the cheapest core material out there. I would use composite sleeving - no seams, no weak points, very torsionally rigid, and infuse or vacuum bag the part.
If you used a premium core material, carbon fiber sleeves, good epoxy, and infusion for the layup, you would get the lightest and stiffest possible wings possible. And, in all likelihood, you will STILL come in cheaper than having moulds made.
Only autoclave and prepreg could beat that, and only maybe. And it would cost ten or twenty times more per part than infusing.
Then, on the flip side, you could use polystyrene foam, fiberglass sleeving with strips of unidirectional carbon for selective reinforcement, good epoxy, and infuse, and you'll get a wing only slightly heavier and slightly less stiff than the carbon/rohacell infused "dream wing" I described above - at possibly half the cost of the "dream wing"
...That's my opinion, at least.
Check out the links below for excellent examples of DIY composite R/C model planes:
http://www.modellbyggeriet.se/sukhoi/
http://www.su27.de/
Quote:
Originally Posted by debetto
SR-71 Model