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#1
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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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#2
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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.
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When in doubt, WHACK the GAS and DITCH the brake !!! Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't ! Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY. ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC ! |
#3
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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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-Wolfram v. Kiparski NAR 28643 - TRA 15520 MTMA Section #606 President |
#4
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Quote:
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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Bernard Cawley NAR 89040 L1 - Life Member SAM 0061 AMA 42160 KG7AIE |
#5
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My guess too... but you never know.
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-Wolfram v. Kiparski NAR 28643 - TRA 15520 MTMA Section #606 President |
#6
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Here is one . . . The "EASY RIDER IV" , from March, 1975. 1/4" Balsa . . . For D12 motors ! Dave F. |
#7
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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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When in doubt, WHACK the GAS and DITCH the brake !!! Yes, there is such a thing as NORMAL, if you have to ask what is "NORMAL" , you probably aren't ! Failure may not be an OPTION, but it is ALWAYS a POSSIBILITY. ALL systems are GO for MAYHEM, CHAOS, TURMOIL, FIASCOS, and HAVOC ! |
#8
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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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-Wolfram v. Kiparski NAR 28643 - TRA 15520 MTMA Section #606 President |
#9
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http://www.modelaviation.com/balsa
http://www.modelaviation.com/images...lsa-density.pdf https://sigmfg.com/collections/specialty-balsa https://sigmfg.com/products/sigb454...36-contest-wood http://www.specializedbalsa.com/pro...alsa_sheets.php https://www.nationalbalsa.com/Aero_..._p/116348ct.htm Last edited by Ez2cDave : 02-25-2019 at 10:24 PM. |
#10
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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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