materials

waffletree
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Re: materials

Post by waffletree » February 8th, 2019, 7:59 am

EmilyCastillo wrote:Yes we have the same question. Is cardboard allowed since it is technically paper?
I submitted a question on the official website, but I don't think they'll answer it, since it's about materials.
ojjacob wrote:Can you use cardboard? Would it fall under "paper"?
im pretty sure that cardboard is fine, because its basically paper sandwiched by paper....
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Re: materials

Post by builderguy135 » February 8th, 2019, 6:13 pm

EmilyCastillo wrote:Yes we have the same question. Is cardboard allowed since it is technically paper?
I submitted a question on the official website, but I don't think they'll answer it, since it's about materials.
Cardboard is fine, but balsa is 10000000 times better.
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Re: materials

Post by ojjacob » February 11th, 2019, 4:56 am

Thank you!!

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Re: materials

Post by MoMoney$$$;)0) » February 17th, 2019, 2:00 pm

Is PLA fair game?
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Re: materials

Post by builderguy135 » February 17th, 2019, 2:59 pm

MoMoney$$$;)0) wrote:Is PLA fair game?
Yes, but it's extremely heavy lol
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Re: materials

Post by Sciencer101 » February 24th, 2019, 11:42 am

builderguy135 wrote:
MoMoney$$$;)0) wrote:Is PLA fair game?
Yes, but it's extremely heavy lol
Maybe for the full glider, but not necessarily for a small piece. If you are 3d printing, you can set a printer to 20-30% infill and the finished product turns out quite light. Does anyone know an ideal dihedral wing angle for the guru glider kit? I am new to this event and am still having issues troubleshooting.

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Re: materials

Post by builderguy135 » February 24th, 2019, 1:42 pm

Sciencer101 wrote:
builderguy135 wrote:
MoMoney$$$;)0) wrote:Is PLA fair game?
Yes, but it's extremely heavy lol
Maybe for the full glider, but not necessarily for a small piece. If you are 3d printing, you can set a printer to 20-30% infill and the finished product turns out quite light. Does anyone know an ideal dihedral wing angle for the guru glider kit? I am new to this event and am still having issues troubleshooting.
Try setting both angles so they are equal, and so they are about 29.5 cm in length.
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Re: materials

Post by Sciencer101 » February 24th, 2019, 5:08 pm

builderguy135 wrote:
Sciencer101 wrote:
builderguy135 wrote:
Yes, but it's extremely heavy lol
Maybe for the full glider, but not necessarily for a small piece. If you are 3d printing, you can set a printer to 20-30% infill and the finished product turns out quite light. Does anyone know an ideal dihedral wing angle for the guru glider kit? I am new to this event and am still having issues troubleshooting.
Try setting both angles so they are equal, and so they are about 29.5 cm in length.
I assume you mean so the wings are 29.5 cm in length? What are the pros and cons of increasing/decreasing the angles? Over increasing and over decreasing tended to make our plane more wobbly. We have a dihedral angle of about 10 degrees. If you wanted the wings as flat as possible, the wings should just be 29.9 cm in length. The guru glider wingspan is 29.08 cm long.

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Re: materials

Post by Thisaintchief » March 17th, 2019, 7:37 pm

Just asking. So I want to use foam for my wings, but like anyone knows the best type of foam that is thin and be slightly sanded? :D :D :D :D

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Re: materials

Post by bjt4888 » March 18th, 2019, 4:09 pm

I use Great Planes Pro Formance 1 mm foam. I sand with 150 grit on a block setup to sand balsa to .025” thick and after about 15 minutes of sanding both sides (removes the shine from both sides and then a little more material) weighs about .0226g/sq in (about equal to 1/32” thick 2.75 lb cu ft balsa). Sanding is a little tricky as the foam tries to buckle as you approach the final stages of sanding. But, using small circular sanding motions and patience will give good results.

I’ve used this foam successfully for a number of gliders (Category II high ceiling and Category I low ceiling) It’s light, tough, bends into a flap curve well and flexible enough after sanding to give a good bunt/flap effect on transition.

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