Any Boost Glider Plans or Kits Using 1/4 Inch Thick Wings ?
I have two sheets of pre-airfoiled balsa from SIG. They are each 1/4 inch thick. One is 4 inches wide and the other is 3 inches wide. I'd like to build a glider from plans using the balsa or make a copy of the wing from a kit using the pre-airfoiled balsa
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Sounds wayyyyyyyy too heavy/thick for boost gliders.
Model aircraft use only. Probably hard/dense balsa too, making it even worse. That stuff is not for making wings; it is aileron stock for fun-fly type R/C aircraft. Bet it has a fully symmetrical airfoil. |
I built one of these using 1/4" thick balsa for C rocket glider. It worked very well, and eventually it thermalled away.
https://www.nar.org/wp-content/uplo...R-G-Vincent.pdf For best performance Jeff's recommended balsa density should be used, but I wouldn't let that stop you if your balsa is a little denser. |
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Those 3 and 4 inch wide pre-airfoiled sheets from Sig are not aileron stock but have a simple flat-bottomed airfoil. They come in 3/16 and 1/4 inch thick x 3 x 36 inch pieces and 1/4 x 4 x 36 as well. Probably medium density (it's been years since I've actually seen one in person). I figured they were long gone, but it turns out they are still available: https://sigmfg.com/collections/sig-...=12305562959950 Too heavy for boost gliders - maybe. |
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My guess too... but you never know. |
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Here is one . . . The "EASY RIDER IV" , from March, 1975. 1/4" Balsa . . . For D12 motors ! Dave F. |
Regarding that above design, back during that era it was common for hobby shops to carry 4 and even 5 grades of Balsa- Soft, Medium, Hard, C-grain, and Contest (lightest).
Good luck with that nowadays...most all is too dense/hard in 1/4" thickness at hobby shops. One would have to order specialty balsa thru a supplier or it most likely would glide like a manhole cover. |
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:rolleyes: Negative Nelly hard at work... When I want to stock up on balsa, I take my digital scale and sweep through all the local crafts stores and I usually come away with some choice pieces of balsa. You can find some pretty good wood this way. Or you can order from SIG. |
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Okay I will do something radical and post an on-topic response.
http://v-serv.com/crp/CRm/1-82/CRm.1-82.19.w.jpg http://v-serv.com/crp/CRm/7-81/CRm.7-81.17.w.jpg |
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