Gravity Wheel
Moderator: scott
re: Gravity Wheel
dradford, This is what I think is unique with this design. The pendulums are not transferring their weight or taking from the slider weight because they make contact from the side of the pendulums. No weight is transferred between the two. The pendulums touch nothing on the wheel except the slider weight at the glove. So the wheel is undisturbed an keeps turning as normal. I'm seeing some interesting things from this wheel. Cheers
I finally started thinking outside of the box, only to find myself in a larger box.
-
- Addict
- Posts: 2094
- Joined: Tue Dec 30, 2008 5:21 pm
re: Gravity Wheel
Connected weights in a fast spinning wheel may want to stay in their position due Centrifugal force. More effort would be required to shift them than one might expect.
. I can assure the reader that there is something special behind the stork's bills.
re: Gravity Wheel
justsomeone, It won't spin fast. 40 to 50 RPM tops. The speed of gravity is rather slow at the earths surface.
<The term g is based on the pull of gravity. An acceleration equal to the acceleration of gravity, 980.665 centimeter-second-squared, approximately 32.2 feet per second per second at sea level; used as a unit of stress measurement for bodies undergoing acceleration.>
Cheers
<The term g is based on the pull of gravity. An acceleration equal to the acceleration of gravity, 980.665 centimeter-second-squared, approximately 32.2 feet per second per second at sea level; used as a unit of stress measurement for bodies undergoing acceleration.>
Cheers
I finally started thinking outside of the box, only to find myself in a larger box.
re: Gravity Wheel
Here is a free pendulum simulator that may be useful - unfortunately it doesn't measure forces at the pivot, which is what I'm looking for.
http://phet.colorado.edu/sims/pendulum- ... ab_en.html
I haven't had any spare time (I have a full time job, like a lot of members here no doubt) to play with Algodoo, I'll try to spend time on it tonight.
http://phet.colorado.edu/sims/pendulum- ... ab_en.html
I haven't had any spare time (I have a full time job, like a lot of members here no doubt) to play with Algodoo, I'll try to spend time on it tonight.
- eccentrically1
- Addict
- Posts: 3166
- Joined: Sat Jun 11, 2011 10:25 pm
The force transmitted through a rod that might hurt your hand is a vibration that is damped in a cord. The gravitational pull on a cord is the same as it would be on a rod. So the pivot would experience the same force in either case.
Calloway's design rests on the pendulums lifting themselves (inward against centrifugal force, not gravity since they are balanced by the opposite pendulums) in the 6-9 quadrant. Dradford's animation is not an accurate picture, imo.
Calloway's design rests on the pendulums lifting themselves (inward against centrifugal force, not gravity since they are balanced by the opposite pendulums) in the 6-9 quadrant. Dradford's animation is not an accurate picture, imo.
re: Gravity Wheel
eccentrically1, Would you kindly explain to us how the pendulums act on a wheel? You say in your opinion that dradfords animation is not accurate. Please tell us why. Cheers
I finally started thinking outside of the box, only to find myself in a larger box.
- eccentrically1
- Addict
- Posts: 3166
- Joined: Sat Jun 11, 2011 10:25 pm
-
- Addict
- Posts: 2094
- Joined: Tue Dec 30, 2008 5:21 pm
re: Gravity Wheel
Excellent observation Ecc. as always!
. I can assure the reader that there is something special behind the stork's bills.
re: Gravity Wheel
eccentrically1, So the mistake is, the pendulums don't swing in at at 7:00 or 8:00. Correct? Cheers
I finally started thinking outside of the box, only to find myself in a larger box.
- eccentrically1
- Addict
- Posts: 3166
- Joined: Sat Jun 11, 2011 10:25 pm
re: Gravity Wheel
eccentrically1, Turn out? Completely wrong. Oscillate? You need to get a wheel with pendulums and actually see how they act. Don't put anything else on the wheel. Just pendulums. Dradford made a animation that is close enough for folks to get a good idea how the design works. It's certainly not perfect. But maybe it helped some. Cheers
I finally started thinking outside of the box, only to find myself in a larger box.
re: Gravity Wheel
Where's Crazy Dave (the pendulum wiz) when you need him. He's got some nice vids of his experiments on YouTube. Can't remember where to find them now.
His handle here is FunWithGravity2
Found one of them. MrJudgeFreed
https://www.youtube.com/watch?v=Oy0gKtWc6Bc&t=38s
His handle here is FunWithGravity2
Found one of them. MrJudgeFreed
https://www.youtube.com/watch?v=Oy0gKtWc6Bc&t=38s