Thread: Team 2526 - Propeller Propulsion Prototype.
View Single Post
  #15   Spotlight this post!  
Unread 11-01-2009, 06:33
Matt H. Matt H. is offline
Long Distance Mentor
FRC #1726 (N.E.R.D.S.)
Team Role: Alumni
  
Join Date: May 2006
Rookie Year: 2007
Location: Sierra Vista, AZ
Posts: 238
Matt H. has a reputation beyond reputeMatt H. has a reputation beyond reputeMatt H. has a reputation beyond reputeMatt H. has a reputation beyond reputeMatt H. has a reputation beyond reputeMatt H. has a reputation beyond reputeMatt H. has a reputation beyond reputeMatt H. has a reputation beyond reputeMatt H. has a reputation beyond reputeMatt H. has a reputation beyond reputeMatt H. has a reputation beyond repute
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.
Last edited by Matt H. : 11-01-2009 at 06:34. Reason: grammar