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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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 |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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. |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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/anxious |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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I know team 180 (SPAM) pretty well. They have always built a simple machine which dominates at the competition. they are not that crazy to do a 12 speed transmission. They are doing a 3 speed transmission which shifts on fly. Thanks for giving it out Gary. - Arefin. |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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. :) |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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.
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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.
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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 |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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Gary DID say this thread might be ripe for the rumor mill :D (But seriously now, would S.P.A.M spread rumors? :ahh: ) ...Arefin, have you been spying?!?! :p |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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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 |
Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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Re: pic: S.P.A.M "Littles-C" 12 speed transmission
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