Astroflight Cobalt 40's

[typhoon_driver]

Grant we didnt throw it. I am afraid its not for sale. Just one of those little tinkets we will be keeping to remind us of our combat days.

[grant_ploughbot]

Are you sure :sad: u got the whole robot to remind you :sad: lol. No probs though.

Just a notice, if anybody has burned out/broken astros that you are about to throw, keep a holof them, i may be intrested in them for replacement parts.

[james...venom]

just out of interest does anybody know what speed an astro 40 with the 1.7 : 1 gearbox run on 14.4v would be? cheers

[storm]

You just being lazy James ?

http://www.astroflight.comwww.astroflight.com tells you speed/volt = 682rpm/v

So 682 x 14.4v = 9820rpm

Put that through a 1.7:1 gear box and you get

9829 / 1.7 = 5776rpm (unloaded speed).

Hardly rocket science - I thought you knew how to build robots ;o) ?

Ed
http://www.teamstorm.comhttp://www.teamstorm.com

[geoff]

Mee Oww!! :wink:

Ed does has a point there

[geoff]

Astro + 1.7:1 reduction + reasonable load = 1 bloody hot Astro!! (even @ 14.4V!)

thanks guys. didnt know how acurate that rpm per volt equation is as i wouldnt of thought it would be an equal rise between the voltages. increased heat and all that gubbins may play a role in slowing the increase to speed down as the rpm goes up? guess not lol

geoff i plan to add another 2:1 on it. hopefully it wont burnt out.

On another point do you know how good the astro 25s are at takeing load? hopeing to use one in the selfrighting arms.

[geoff]

1.7:1 X 2:1 = 3.4:1... I wouldnt want to go any less than that for something like a spinner drive.
As for the 25s, had no dealings with them.. sorry.

ye im actualy after a 3:1 or 2.5:1 reduction but RS only do the 2:1 bevel gears.

the astro 25 would be geared down 30:1 then attached to a thread which will make the arms move. it may come close to stall as the arms are on a 10:1 leverage?