pic: S.P.A.M "Littles-C" 12 speed transmission

[nuggetsyl]

maybe i am stuck in the past but why would you need to have more then a 2 speed transmission. the field is not that long

[Gary Dillard]

Originally Posted by nuggetsyl

why would you need to have more then a 2 speed transmission

because..... it's really cool to have one.

[Dan Richardson]

lol I call shenanigan as well, I bet they're still going w/ holonomic heh.. this is either and amasingly awesome gearbox, or its taken out of something that has around 12 speeds..

like a blender, or a giant egg beater.. or maybe some other sort of kitchen appliance.


:-P

[Tom Bottiglieri]

4 speed is good, but 12 is overkill.

It is trying to achieve CVT like performance, but at the speeds these robots move, it would spend too much time shifting to come anywhere near the efficiency of a CVT.

[tiffany34990]

well I can't say much either but I will say just as Dillard has: I've seen it, touched and and looked at it. S.P.A.M. is just wonderful what can I say. 12 speeds yeah we have nothing better to do with our time along with many other projects we do in the fall.
So yeah 12 speeds seems a bit much but hey it's us Speed Power and Maneuverability that's what S.P.A.M. is all about.

[jimfortytwo]

I'm a bit confused by the number twelve. With the most common shifting designs, you'd expect a 2^n number of gear ratios. But... 2 x 2 x 2 = twelve? They'd have to be doing something pretty ingenious.

[Max Lobovsky]

Maybe those are the most common shifting designs in the FIRST world, but when you look at the much larger world of engineering, there are numerous 5 and 6 speed car transmissions and I believe 18-wheelers have 12 speeds.

[henryBsick]

I am still sticking with this... The 12 speed is not meant to be used in competition. And somehow IF it were it is NOT a shift on the fly...or shift at all for that matter. It would be a pre-match selectable gear. The three speed shift on the fly IS their gearbox for the drive tain. PERIOD

-Henry

[EricS-Team180]

Originally Posted by Henry_222

I am still sticking with this... The 12 speed is not meant to be used in competition. And somehow IF it were it is NOT a shift on the fly...or shift at all for that matter. It would be a pre-match selectable gear. The three speed shift on the fly IS their gearbox for the drive tain. PERIOD

-Henry

Henry, it truly is a 12 speed shift-on-the-fly gearbox...we aren't kidding about that. The designer (Cory Littles) had the inner works of a grandfather's clock in mind when he designed it. It has been tested on a chassis.

Gary DID say this thread might be ripe for the rumor mill (But seriously now, would S.P.A.M spread rumors? )

...Arefin, have you been spying?!?!

[tkwetzel]

Originally Posted by EricS-Team180

It has been tested on a chassis.

Did it work well? What motors were you using and how fast could you go in the lowest and highest gears? Can't you share a little more information?

[EricS-Team180]

Originally Posted by tkwetzel

Did it work well? What motors were you using and how fast could you go in the lowest and highest gears? Can't you share a little more information?

Ok, I think this teaser has run its course.

The gearbox was built by Cory and his uncle for a "Barbie car" design they have been experimenting with. It can carry a pre-k child ~50lb. The front wheels steer and they've tried several combinations of all-wheel drive, by using 1 and 2 of these gear boxes. Cory tells me he powered it with a "big" RC car motor. The car is currently torn down and is one of his "once-in-a-while" projects. Why 12 speeds?...ah heck...why not?

Eric

[sanddrag]

Originally Posted by EricS-Team180

Ok, I think this teaser has run its course.

The gearbox was built by Cory and his uncle for a "Barbie car" design they have been experimenting with. It can carry a pre-k child ~50lb. The front wheels steer and they've tried several combinations of all-wheel drive, by using 1 and 2 of these gear boxes. Cory tells me he powered it with a "big" RC car motor. The car is currently torn down and is one of his "once-in-a-while" projects. Why 12 speeds?...ah heck...why not?

Eric

You're joking right? A Barbie car? That's even more rediculous than having it for a FIRST robot. Anyway, does it work well?

[Kyle Love]

Originally Posted by nuggetsyl

maybe i am stuck in the past but why would you need to have more then a 2 speed transmission. the field is not that long

I agree...I would guess this is just for fun and would not be put on a robot because it would be nearly useless to shift through 12 gears. At tops I believe a team may need a 3 speed. But 12 is too much for my blood. If this was just for the heck of it or not I think its awesome!

[tiffany34990]

but hey it's a cool thing. 12 speeds yeah it looks like a grandfather clock--but ya know we all like to get a bit crazy and have some fun--and we just had to tease y'all. just having fun during this crazy build season. what we are really up to at home in our bit well umm.... that's a different story.

[Projectchon]

THIS IS CARZY