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Glen
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http://www.autoblog.com/2011/06/08/mit-students-develop-liquid-fuel-for-electric-cars/

Pretty cool idea that! Sounds as though they're basically pumping electrolyte into the car and out again like normal fuel. I guess they'd recharge the electrolyte at the station and reuse it or something like that?
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Post Thu Jun 23, 2011 9:49 am 
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Jaemus
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Wow, thats pretty awesome, it sorta feels like it might be the breakthrough that this industry needed
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<Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls

Post Thu Jun 23, 2011 11:32 am 
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Valen
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the idea has been around for quite some time
vanadium redox batteries eg
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Post Thu Jun 23, 2011 11:43 am 
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Spockie-Tech
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My Noisy Toy Ive been tinkering with Recently. Open Source Electronics + Fuel Power = Fun !


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Post Wed Sep 21, 2011 11:14 am 
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timmeh
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Trying to work out how 1 tonner axles are supposed to be stronger.

Both axles have the same bearing with the same 35mm id and are both the same length.

Axle one starts at 35mm and tapers down to 30mm at the splines.

Axle 2 starts at 35mm and remains 35mm for most of the length until it then dips to 30mm for the last 200mm at the splines.

Axle 2 is supposed to be stronger and handle more weight?

I cant see how this is as both axles have the same thickness where the load rests on the hub and the same thickness where they insert into the diff and the twisting would start.

To me both would snap at the same 30mm point at the splines from high power or both would snap at the 35mm end with too much weight.

Its like saying we made the middle of the chain bigger but left the end links the same thickness.

Could someone enlighten me on this?
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Post Thu Nov 03, 2011 6:25 pm 
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Valen
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3 thoughts
1) the neck at the end could cause a stress concentration possibly leading to fracture over time.
2) heat treating, the weak one could be as turned the strong one might be annealed and tempered after machining.
3) different steels, one could be a "higher" grade of steel and they use the same gubbins in the rest of it (bearings etc) just to make things easier.
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Post Thu Nov 03, 2011 6:36 pm 
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timmeh
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Good point after looking at the difference in shape soo much the thought skipped my mind on them using better steel.
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Post Thu Nov 03, 2011 6:51 pm 
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DumHed
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#2 will be more rigid over its length, so will be able to handle more weight on the hub end without causing bending / whipping.

From a torque point of view they shouldn't be much different, but #1 will twist more of its length, which might actually be worse overall for strength.
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Post Fri Nov 04, 2011 5:14 pm 
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marto
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Absolutely no idea about cars but +1 on dumheds comments.

And yes the sharp step in #2 may concentrate shearing force at that point and make failure more likely.

Steve
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Post Fri Nov 04, 2011 5:27 pm 
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Jaemus
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Hey glen


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<Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls

Post Wed Aug 01, 2012 7:54 pm 
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Valen
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Don't taunt the animals Jaemus they may start flinging poo ;-P
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Post Wed Aug 01, 2012 8:25 pm 
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Glen
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Niiiice! they even gave you a free shovel hanging off the back Razz Hows it compare to the cbr? Need to go for a ride sometime Smile

Contribution - Toying with the audio on the gopro. >__> its really bad still. Need to find a workable microphone one of these days



And some camera angles


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Last edited by Glen on Wed Aug 01, 2012 8:59 pm; edited 2 times in total

Post Wed Aug 01, 2012 8:54 pm 
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Valen
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Fancy, tried between the forks on the wheel?
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Post Wed Aug 01, 2012 8:57 pm 
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Glen
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Nah, it would smash into the radiator haha. Probably less than ideal. I want to set it up down near the bottom of the fairing so it gets really close to the road when you hook it round some turns, but there's no where for the safety lanyard to go. Have to get a longer one!
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Post Wed Aug 01, 2012 9:01 pm 
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Jaemus
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heh yeh glen if i ever get bogged and need to dig my way out i can just unbolt the rear fender and use that
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<Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls

Post Wed Aug 01, 2012 10:02 pm 
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