New Robots

[peterwaller]

In the UK you can get the 40 MHz miniature crystals from Micron Radio Control ?5 each.
http://www.micronradiocontrol.co.uk/crystals.html

[BeligerAnt]

...according to http://en.wikipedia.org/wiki/Flywheel_energy_storage the formula for kinetic energy is mass times angular velocity squared, so you should get much more kinetic energy by increasing the angular momentum, rather than the weight.

True, but that's only part of the story. There is also the momentum (mass x velocity) to consider. It's conservation of momentum (a consequence of Newton's first law) that causes a moving object hitting a stationary object to cause the stationary object to start moving. Think of a "Newton's Cradle".

There is clearly a tradeoff to be made between velocity and mass, but the optimum combination will also be affected by the finite supply of power from the motor.

Assuming a constant power supply (motor) resulting in a constant kinetic energy, we get the following:

momentum = mass x velocity
kinetic enrgy = 0.5 x mass x velocity^2

10g @ 10m/s = 100gm/s (momentum) = 500gm^2/s^2 (kinetic energy)
100g @ 3.16m/s = 316 gm/s (momentum) = 500 gm^2/s^2 (kinetic energy)

This is slightly over-simplified because it assumes linear motion instead of rotation. The basic theory still holds though. For best results use a big motor and a heavy disc! (But I think we all knew that anyway!)

Here endeth the physics lesson...

[Remote-Controlled Dave]

[Cavecrusher]

From the Evil Design Studios located in weed smoking Holland, a new evil has arrived.





http://home.hccnet.nl/h.bouwens/kartoucha.3gp

[Andrew_Hibberd]

Nice, shame it wasn't competing today. Is that a 300df?

[Cavecrusher]

nope, the typhoon 3/3d

[Andrew_Hibberd]

Just seems very fast, how many lipos?

[Cavecrusher]

3 lipos

[josh]

looks very evil tim dont wanna fight that for fun

[Adam Hargreaves]

i would...lol, i like suicide fights-actually means i have to rebuild, rather than just doing it for the sake of it.