I am from India. I have taken this as my engineering project. I am very much pleased by your answer. I may need your guidance throughout my project. Hope you help me.

 

I'm not sure about the availability of RC rock crawlers in India. Is this just an engineering project? Or is it a school project? If it's for school, I don't know if you can just use a rock crawler kit.

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Tanaka Sensei (avatar) says: Please spell it "ridiculous" correctly! Not "rediculous". ^^

 

This is an engineering project ! I cant use a readymade kit.

 

interesting... very interesting

 

When's it due?

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Bill
Smart Kits build Smart People
http://www.blueroomelectronics.com/

 

These are good if you can find them It will go all most any where and you can change the gears for more toque

This one can cross water and land.

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Burt
http://mybe80be.com
http://stores.shop.ebay.com/mybe80be__W0QQ_armrsZ1

 

You guys need to get together with a fabrication forum, theyre always like "I made these kick ass tracks and suspension, but how do I make the electronics to drive them around?"

by the way, if you want to do what be80be mentioned, they have a lot of toys with parts like that at goodwills, salvation armies and other thrift stores. Its not related but I hate the misconception some people have that when you buy from them you are partaking of the charity rather than giving to it. They sell stuff and use the money to employ people, they want as many people as possible to buy that stuff.

 

Can i use some differential gear mechanism for the shaft movement?

 

for the shaft on a treaded vehicle I don't think you would want to, usually the wheels on one side move at about the same speed and for a small one the differential would be more complicated than its worth, while for opposite sides they are completely independant because driving the two treads separately is how you steer a tank drive vechicle, infact I think thats what people usually mean when they say "tank drive". For wheels you can certainly use a differential, its done all the time, you can buy them in all sizes. If your talking about to split drive torque between land and water propulsion, I'm not sure how that would work, it seems like you would mostly use one or the other.

 

http://auto.howstuffworks.com/differential.htm
You absolutely do not want a differential gearbox if you are climbing things. Having a differential means smoother steering, but also means that losing traction on one wheel means losing all torque (and getting stuck).

But if you mean differential steering (different wheel direction on both sides) that is actually preferable since it means you can turn on the spot. But this can difficult and requires a lot of parts if you use a suspension system though for your wheels since you need something like the Jeep Hurricane and not a regular trucks (which only have one driveshaft so all wheels must spin in the same direction). This is one part where tracks are better (climb better, steer better on rough ground with fewer parts).

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Tanaka Sensei (avatar) says: Please spell it "ridiculous" correctly! Not "rediculous". ^^

 

Sorry guys but the military figured out a all Terran water/land/air mobile system platform that can even carry a payload and shoot a weapon accurately along time ago!

Its cheap, mass produced, comes in countless sizes and colors, and can even take voice commands directly or by remote and often in multiple languages too!

With the right accessories its bullet resistant and can run for days without recharging!

All analog based and even tested and found to be animal friendly!

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"Issue a general safety warning. Then look the other way and allow stupidity the chance to eliminate itself." -- tcmtech
"Those who can, Will. Those who can't, will achieve positions of power over those who can and then promptly stop them." -- tcmtech
"Your impossibility may just be my day to day routine." -- tcmtech

 

Some might take offense to that. THe rest is true though...except for the air part and some of the water part. I've yet to see a person fly without a plane, or swim with all that gear.

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Tanaka Sensei (avatar) says: Please spell it "ridiculous" correctly! Not "rediculous". ^^

 

It is offensive, but its true, and if it didnt make sense from a purely economic standpoit we would have 140,000 robots and 2000 humans in iraq instead of the other way around.

 

Then why is losing a soldier so bad? It's not that they're cheaper as much as it is that they can take care of themselves well enough that it pays off. The reason we don't have more robots over there is because they would all get their ass kicked by humans.

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Tanaka Sensei (avatar) says: Please spell it "ridiculous" correctly! Not "rediculous". ^^

 

I wasn't saying it was moral, and humans are cheaper if you're talking about a robot with comperable performance. just developing the batteries to make a robot do as much between charges as a person can between rest would cost atleast tens of billions of dollars. And those wouldent even be the hard part.