Team 2526 - Propeller Propulsion Prototype.
 

Vid:

http://uk.youtube.com/watch?v=Dbi4zbcp3wE

Tell me if you want some specs. or whatnot.

Re: Team 2526 - Propeller Propulsion Prototype.
 

try a condensor fan from an airconditioner, works great;)

Re: Team 2526 - Propeller Propulsion Prototype.
 

Have you tested to see if it (or 4 of them) can generate enough force to move your robot?

Re: Team 2526 - Propeller Propulsion Prototype.
 

Have you measured the thrust this produces?

Re: Team 2526 - Propeller Propulsion Prototype.
 

If you noticed, those fans remain stationary. Their high pitch allows them to push a lot of air, yet have minimal thrust because of all the stalling. I'm pretty sure it wouldn't be a good idea. We're currently running 12.25 - 3.75 plane props which at meant for maximum thurst.

Re: Team 2526 - Propeller Propulsion Prototype.
 

Can some other team argue that this interferes with their robot's movement? Just curious.

If it has enough thrust to have any effect on your robot, then why not on the robot in front of you?

Anyone?

Re: Team 2526 - Propeller Propulsion Prototype.
 

Not yet, we haven't had time to make a rig to measure it, or obtain a newton meter for that matter =/

Re: Team 2526 - Propeller Propulsion Prototype.
 

If you say that, then perhaps bumping into other robots should be illegal?

Anyone?

=P

Re: Team 2526 - Propeller Propulsion Prototype.
 

Umm that wasn't a hit at your design


It was a serious question.

Re: Team 2526 - Propeller Propulsion Prototype.
 

You probably could argue that it interferes with your robots movement, but IIRC there's no rule that says interfering with another robots movement is illegal. So, arguing that it interferes with you would be irrelevant.

Re: Team 2526 - Propeller Propulsion Prototype.
 

Yeah i know, but i don't see why it would be any different from physical contact such as bumping and throwing balls at each other.

I mean, it is part of our plan to abuse the fact that we might be able to blow balls away from our trailer, but really, nothings stopping any other team from making a fan, right? =)

Re: Team 2526 - Propeller Propulsion Prototype.
 

Wrong tone? Do i sound bitter or sarcastic or something? Sorry XD

Re: Team 2526 - Propeller Propulsion Prototype.
 

I think he's mainly referring to the word "abuse." So in other words yeah... I think it's you're tone. In other news your "sorry" seemed pretty much sarcastic with your XD at the end of it lol.

Re: Team 2526 - Propeller Propulsion Prototype.
 

Just drop it. Its cool.

woot, 1403 post, Cougar Robotics

Re: Team 2526 - Propeller Propulsion Prototype.
 

To return to the original point of the message. Thank you for the demonstration--while you don't have a newton meter avaliabe it is very simple to build something which will have a similar effect. Take a box and suspend it making a pendulum (longer suspension will mean greater accuracy), mount your fan set up on it and let her rip. By measuring the angle off normal created when your fan is turned on and using a simple bathroom scale to measure the mass of the box and your fan set up you will have more than enough accuracy. Here's the math:
Fractional force of gravity pointing in the horizontal direction: Fgx
Force due to gravity: Fg
Angle created by string from normal: theta
Fgx=Fgsin(theta) By inspection
Fprop=Fgsin(theta)

Note that this lets you give a force in Lbs which are much nicer than newtons.