What is ?

[Dafni]

Originally posted by Serum
you never had the gmaxx CF in hands.. It is lighter than light.. You need to keep your hands above it instead of underneath it..

LOL, the braces are hollow and filled with Helium. Take the wheels off and you can use it as a plane..... :L:

Good one, Serum.

Already the alu G-2 is surprisngly light.

RCHippie, you must be lucky, then. You have a really unique collection;)

[Serum]

Rchippie, i missed your post.. I didn't knew RB made a CF chassis.. Guess it was a limited edition or something like that?

@dafni, i heard some people fill the tires with helium as well, looks like pure crap to me, because they are designed to breeth..

[Nick]

Also helium won't make it lighter it will just produce a force pushing upwards - which I would of thought is bad.

[Dafni]

Nick, weight is nothing else than a force pushing downwards. So if you have a force pushing upward, you can subtract this from the "weight".

I could bother you with talk about gravitational constants and difference between "mass" and "weight", but I won't. Life can be so simple, but there is always a way to make it sound complicated.

(don't want to sound braggin', but sometimes nerdiness just takes over)

Serum, I could also calculate the buoyancy of 4 Helium filled tires, but I will spare you. It's most probably not even enough to lift a small 3mm screw.

Dafnerd

[Serum]

No, all the foam that is in the tires isn't filled with helium i pressume.. it might take some time to fil that up.. though helium is thinner than air, so it should give a faster respons to the tire...

Or am i completely wrong Daniel?

[Nick]

But if the helium is not balanced it will put the wheel off track more than weight would pushing down?

[Serum]

No, the mass of the vehicle prevents this...

[Dafni]

Helium thinner than air? As in less density? Or less viscousity?
Both is the case with Helium, but the difference is neglectable, especially in our application.

As for faster response, I dunno. This sounds esoteric to me.
I like my tires with big vent holes, and "tune" the response with foams.

Nick, a gas not being balanced? In a spinning container?
I don't see this.

But anyway, Helium definitely has no real application in RC Monstertrucks. Unless someone comes up with a liquid Helium Cooling Circuit for BL motors :L: Stuff is hella cold!

[RC-Monster Mike]

Air tight tires in an r/c car would make for poor handling, regardless of the gas used. This is quite a fun conversation, though! Helium would pass through the rubber in time, wouldn't it? It always manages to escape the balloon!

[Serum]

Yeah, that's because it's thinner.. (in both ways..) i heard they run special gas, (i know the dutch name, don't know the scientific name for it..) in tires for powerbikes, the tire will run empty sooner than with air, but i thought they use it, because it hasn't got the large expanding air has got when it gets hotter..

(now THAT's one weird sentence...)

Closed tires on an RC vehicle makes the handling wors..

[Serum]

Not my bag of cookies.. We're on Daniels territory now..... Be gentle Daniel...

[Batfish]

I have a non-nerdy ( :) ) note to add to this thread.
There's a show called Mythbusters on the Discovery channel here. They regularly take urban legends and myths and try to prove them wrong or right.
One urban legend is that a bundle of balloons at a fair floats a child away when they're all handed to the kid.
Mythbusters tested this by seeing how many balloons it takes to get a 40lb item off of the ground.
It took them about 3,500 balloons inflated over about 5 1/2 hours before they could get a 40lb item to lift from the ground.
They found that 10 party balloons would lift 100 grams.

What I took from the show is that helium really doesn't have as much 'lift' as we'd like to think :)

[Papa]

My boy loves that show.:cool:

[nitrostarter]

Originally posted by Serum
Yeah, that's because it's thinner.. (in both ways..) i heard they run special gas, (i know the dutch name, don't know the scientific name for it..) in tires for powerbikes, the tire will run empty sooner than with air, but i thought they use it, because it hasn't got the large expanding air has got when it gets hotter..

And that gas is called Nitrogen. Thats what they are trying to get us to use at the shop. They want us to fill all tires with nitrogen as it doesnt permeate through the rubber like air does. Only one set back tho. Who is going to pay money to fill their tires when plain ole compressed air does the job.
Sorry about the digression. Moral is Nitrogen is up and coming but it costs versus air.

[Serum]

My boy loves that show

not only your boy.. This 29 year old boy loves it too..