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Re: Wind Power B/C

Posted: December 19th, 2016, 10:11 am
by chalker
SPP SciO wrote:
dhdarren wrote:
SPP SciO wrote:
The rule is written like that to permit tape or glue, not prohibit it, so I'd suggest sticking with your initial instinct.

It's probably also possible to build a slotted blade that has a friction hold on the cd (akin to a paper clip) but, tape or glue should give you a light and durable hold.
A slotted blade won't work, at least for this year. If I'm understanding you correct, you're implying that the blade goes on the thin edge of the CD, correct? Since the rules prohibit any part of the blade on the rear side of the CD this year, a slotted blade would be in violation.
Good point - that's rule 3.f. Don't do the slotted blade idea. Glue or tape works fine.
Technically there are also ultra-small screws (you'd have to use nylon, not metal ones) you could use to mount to the CD, as long as no part of the screw protrudes from the back surface (either via trying to thread the hole in the CD or via counter-sinking from the back side).

Re: Wind Power B/C

Posted: December 19th, 2016, 6:09 pm
by kenniky
chalker wrote:
SPP SciO wrote:
dhdarren wrote:
A slotted blade won't work, at least for this year. If I'm understanding you correct, you're implying that the blade goes on the thin edge of the CD, correct? Since the rules prohibit any part of the blade on the rear side of the CD this year, a slotted blade would be in violation.
Good point - that's rule 3.f. Don't do the slotted blade idea. Glue or tape works fine.
Technically there are also ultra-small screws (you'd have to use nylon, not metal ones) you could use to mount to the CD, as long as no part of the screw protrudes from the back surface (either via trying to thread the hole in the CD or via counter-sinking from the back side).
Wouldn't that modify the CD?

Re: Wind Power B/C

Posted: December 19th, 2016, 9:03 pm
by Ionizer
kenniky wrote:
chalker wrote:
SPP SciO wrote:
Good point - that's rule 3.f. Don't do the slotted blade idea. Glue or tape works fine.
Technically there are also ultra-small screws (you'd have to use nylon, not metal ones) you could use to mount to the CD, as long as no part of the screw protrudes from the back surface (either via trying to thread the hole in the CD or via counter-sinking from the back side).
Wouldn't that modify the CD?
Yeah, but its allowed. The rules say no modification except to attach the blades. This modification would be to attach the blades.

Re: Wind Power B/C

Posted: December 20th, 2016, 4:02 am
by JonB
I would have to ask, for what reason would you want to use screws when tape works perfectly well? If you are considering making an adjustable blade system using a screw then I would recommend simplification of the design.

Re: Wind Power B/C

Posted: December 20th, 2016, 10:08 am
by windu34
JonB wrote:I would have to ask, for what reason would you want to use screws when tape works perfectly well? If you are considering making an adjustable blade system using a screw then I would recommend simplification of the design.
^Seconded

Re: Wind Power B/C

Posted: December 20th, 2016, 6:30 pm
by calvin102111
windu34 wrote:
JonB wrote:I would have to ask, for what reason would you want to use screws when tape works perfectly well? If you are considering making an adjustable blade system using a screw then I would recommend simplification of the design.
^Seconded
If you were planning to do an adjustable design, I would probably recommend using a slot type design, so you can take out and insert blades at will.

Re: Wind Power B/C

Posted: January 4th, 2017, 9:28 am
by ashmmohan
still, with a slot type design I would use tape. screws would unnecessarily increase weight and are not as efficient as tape.

Re: Wind Power B/C

Posted: January 5th, 2017, 12:10 pm
by calvin102111
I have to be honest here, I can't see any advantages of using tape over glue. Glue is much lighter, and will provide much less resistance than pieces of tape. Here are two types of super glue that I've used previously:
https://www.amazon.com/Insta-cure-filli ... noacrylate

or

https://www.amazon.com/Insta-cure-filli ... noacrylate

The first option is better and cures quicker, but the second option will still work fine (I used it up to the regional level).

Re: Wind Power B/C

Posted: January 5th, 2017, 1:01 pm
by 0ddrenaline
calvin102111 wrote:I have to be honest here, I can't see any advantages of using tape over glue. Glue is much lighter, and will provide much less resistance than pieces of tape.
Tape makes it adjustable. I use tape until the blade is just right, and then I use glue as a final touch.

Re: Wind Power B/C

Posted: January 5th, 2017, 6:49 pm
by calvin102111
0ddrenaline wrote:
calvin102111 wrote:I have to be honest here, I can't see any advantages of using tape over glue. Glue is much lighter, and will provide much less resistance than pieces of tape.
Tape makes it adjustable. I use tape until the blade is just right, and then I use glue as a final touch.
Ah, I guess that makes sense. In all fairness, I'm fairly confident with my design, so I've been going straight to glue :)