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Model Forum / Radio Controlled / Air Models / July 2004Scaling plans
I'm trying to scale some plans for a long ez from a .40 to a 1.20 so I can use a gas engine. Anyone know a good way to do this? Most any copying/printing shop can blow up or reduce plans. It's not cheap, but is the easiest/quickest way to get it done. > I'm trying to scale some plans for a long ez from a .40 to a 1.20 so I > can use a gas engine. Anyone know a good way to do this? Aloha, Go to your local community college or university and post a notice on the engineering bulletin board asking for assistance ... you should be able to find a student with CAD abilities to put your plans into the CAD program and exactly scale them for print out ... Or you can mail them to one of several places on the internet that will do that for you too ... and even cut the parts for you! I'm trying to scale some plans for a long ez from a .40 to a 1.20 so I can use a gas engine. Anyone know a good way to do this? I have the ability to do the scaling in Autocad but I'm not sure how big to make it. The plans are for a .40 size and I want to scale it to take a 1.20 size but I'm not sure of the scaling. >Aloha, > [quoted text clipped - 4 lines] > I'm trying to scale some plans for a long ez from a .40 to a 1.20 so I > can use a gas engine. Anyone know a good way to do this? Well, I am scaling a .46 two stroke size Ballistick (54" wing) up to a 1.20 four stroke size (72" wing). Look around for other 1.20 size planes for a hint as to size. -- Paul McIntosh http://www.rc-bearings.com > I have the ability to do the scaling in Autocad but I'm not sure how > big to make it. The plans are for a .40 size and I want to scale it to [quoted text clipped - 3 lines] > > > >Go to your local community college or university and post a notice on the engineering bulletin board asking for assistance ... you should be able to find a student with CAD abilities to put your plans into the CAD program and exactly scale them for print out ... > >Or you can mail them to one of several places on the internet that will do that for you too ... and even cut the parts for you! > > > > I'm trying to scale some plans for a long ez from a .40 to a 1.20 so I > > can use a gas engine. Anyone know a good way to do this? Its a volume scale, not a linear scaling. A doubling of horsepower only gives you a small increase in wing span, not 2X > I have the ability to do the scaling in Autocad but I'm not sure how > big to make it. The plans are for a .40 size and I want to scale it to [quoted text clipped - 8 lines] >> I'm trying to scale some plans for a long ez from a .40 to a 1.20 so I >> can use a gas engine. Anyone know a good way to do this? I've read that you can reduce plans and build a plane that flies ok. But when you start enlarging 2x and 3x the flying characteristics can dramatically decrease. >I'm trying to scale some plans for a long ez from a .40 to a 1.20 so I >can use a gas engine. Anyone know a good way to do this? If you scale everything up the same amount you will end up with a very heavy plane. Although size increases, you need to scale the wood parts proportionately less. If a plane has 1/8" fuselage sides and you double the size of the plane, you really DON'T need 1/4" thick sides! -- Paul McIntosh http://www.rc-bearings.com > I've read that you can reduce plans and build a plane that flies ok. > [quoted text clipped - 3 lines] > >I'm trying to scale some plans for a long ez from a .40 to a 1.20 so I > >can use a gas engine. Anyone know a good way to do this? I kind of guessed that one but thanks anyway. I was planing on scaling overall dimension then doing guess work on the rest. My plan is to do a foam core wing verses the original balsa ribbed then a thin skin of balsa followed by a some light but not to light fiberglass. I'm going to build a styrofoam mold for the fuselage then glass it and pull the foam after hardening. If it doesn't work it doesn't work but the way I plan on putting the wing an fuse together I won't have alot tied up in it. I have most of the stuff now so its just a matter of putting it all together. >If you scale everything up the same amount you will end up with a very heavy >plane. Although size increases, you need to scale the wood parts >proportionately less. If a plane has 1/8" fuselage sides and you double the >size of the plane, you really DON'T need 1/4" thick sides! |
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