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Rares Gosav:
17 Jan 2020 17:44:22
Hi guys and happy new year!!!
ched:
01 Jan 2020 00:12:50
Happy new year everyone, happy flying.  :beer2: :beer2:
Gaza07:
31 Dec 2019 17:06:13
Happy new year all hope 2020 is a cracking year for you  :beer2:
ched:
25 Dec 2019 00:00:49
Happy Christmas to everyone.
apollo7:
24 Dec 2019 13:50:56
Seasons greetings to all on this forum have a good one ;)
ched:
21 Dec 2019 17:58:42
Have a great time DB. Look forward your projects in 2020.  :beer2:
hoverfly:
21 Dec 2019 16:59:17
Have a good one D.B. ~~ :beer2: :beer2: :beer2:
DarkButterfly:
21 Dec 2019 16:14:27
 :beer2:
DarkButterfly:
21 Dec 2019 16:13:44
Tbh I've been really busy, not had much time to fly anything and with conditions being crap, hopefully in the new year I'll have some new projects on the go, mostly to do with HAM radio, will certainly fly again soon. FTR I hate FB too   :D Merry Christmas
Gaza07:
21 Dec 2019 15:21:30
Merry Christmas  :beer2:
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3d - Printworx

Printing 3d Forum

Aluminium arms.

Started by sausageroll, Thursday,September 27, 2012, 13:30:26

Previous topic - Next topic

sausageroll

So I started off with carbon. Too damn strong, and with the hex, too expensive - 90 quid in carbon each hex, so I thought id try aluminum.

I got two 2m bits of 20x20mm box section for about 6 quid each (cheap!) Each bit will do one hex, with the arms at 320mm long each.

The whole bit weighs 600g, so I did some maths and they come out to 96g each, seems very heavy, 500g+ just of arms.

I then worked out how much the wood arms weigh (a sensible person would have weighed one but Im lazy and so i calculated it based on the density figure of 560kg / cubic metre) and they came out to 85g each (the wood ones are longer, im cutting two inches off caus at the moment its too big to sit on the table in the dining room and that is very annoying)


So aluminium, not much heavier than wood, but stiffer and cheap and looks nicer tahn wood. Ally also tears nicely so im gonna cut some V shapes into it as stress points to fracture.


This means the entire quad will be 100 percent aluminium, no carbon, no wood. A bit of brass and plastic and some stainless steel in the screws. Man materials, none of that carbon fibre crap! :-P



Pete.

Gaza07

I suppose we will need to see new pictures now  ;)  ~~

sausageroll

Yeah, gonna take the bar to my machine shop friends and cut it up on their big bandsaw. Then will bead blast to give it a nice texture (gonna paint them) and then fit and drill them.

Gonna paint with bbq paint i think, and blast it with the map gas torch to cure it. That sticks pretty firm.



sausageroll

Cut my arms up, gave them a light bead blast. Gonna drill holes in a bit.



Also got some more of my superlight bolts from my nut and bolt man. This bag contains 30 M5x30 bolts, 30 nyloc nuts and 60 washers, whole bag is only 80 grams. Not bad eh ;-)


sausageroll