Full-Body Drum

From The Idea Dump:

Quote :

Full-Body Drum

Will spotted these a few years back, and I decided to take a bit of a closer look into them (scroll down until you see Daffodil versions 1 & 2):

http://www.happyrobots.com/retired.html

Pretty straightforward, it could be advantageous because you get to use most of your weight toward the drum & internals, as opposed to using it towards the typical chassis & armor configuration. I would actually make one change to the above design (mainly for the now-popular large-diameter drums): Instead of two large wheels, have three smaller wheels geared into the output shaft of your gearbox in a planetary configuration - all three wheels will rotate in the same direction, maybe getting you something closer to a tank drive than just a two-wheel drive.

That looks really, really cool. It's like a shell spinner, but sideways.

Yeah. I'm working on rough sketch work for a 12/15 lb robot at the moment, but a 120 lber would be pretty epic. I'm thinking a one-foot diameter drum would be about standard for that scale, which would be pretty insane.

That would need some pretty big wheels if you want it to be okay if gets flipped though.

Of course. Three per side arranged in a triangle, actually (the whole tank-drive thing). Another thing I just realized was the drum in a 120 could easily use 70 pounds, possibly 80, on the drum alone (no need for armor).

How the hell would you spin an 80 lb drum with a 1 foot diameter?

Big-Ass perm motor! I've been wanting to do one for a while now! we should do it

YES!!

Eddie and I have been working up plans for a bot just like this for a year and a half now too! we arrived at the exact same 3 wheels on a planetary gearbox idea as well... We should both build them and compete lol.

okay!
ours will be 15 pounds probably.. then a 120

last week eddie spent a few hours trying to shrink our 120 design to a 15... i have yet to master solidworks lol so i draw on paper and 2D autocad2000...

it would be crazy to make the three wheel a single assembly that you take off, where you have like a single mounting bar with a drive motor on each side and on each side of the bot you have 3 or 4 ev warriors or something, using like a sprocket friction drive to the drum

not to sure about weights but itd be sick

What I'm wondering is what a fight between a full-body spinner and a full-body drum would look like...

i see a wheel coming off the drum :-/

I see a 120 lb full body spinner flying through the air.

I see a good fight!