Search found 40 matches

by frettsy
Sat Jul 12, 2014 8:07 am
Forum: General Discussion
Topic: Frettsy's "Volatility Wheel"
Replies: 3
Views: 1047

re: Frettsy's "Volatility Wheel"

Indeed! I had not seen the Minto wheel, although I had considered the similarity between my idea and the drinking bird. My idea is like an inverse of the Minto wheel, almost :)
by frettsy
Sat Jul 12, 2014 7:23 am
Forum: General Discussion
Topic: Frettsy's "Volatility Wheel"
Replies: 3
Views: 1047

Frettsy's "Volatility Wheel"

Hi folks, Long time no see (like, 5.5 yrs)! Nonetheless, I'm back. I've had this idea for a Volatility Wheel for a while. It's pretty simple/rudimentary, but seems certain to work. Take a wheel with, say, 4 spokes (but the more the better). On the end of each spoke, attach a compartment filled with ...
by frettsy
Mon Aug 18, 2008 3:43 pm
Forum: General Discussion
Topic: grav lift
Replies: 5
Views: 2915

hi all - sorry I haven't replied in weeks - I've been away. I remember when I was little and one of the doors in my house would mysteriously open itself. I could have sworn it was a ghost. later I realized that it was air pressure - when another door at the end of the hall was opened, it would suck ...
by frettsy
Thu Jul 24, 2008 2:17 pm
Forum: General Discussion
Topic: grav lift
Replies: 5
Views: 2915

thanks guys, glad you at least see potential here. KAS: since the air first travels perpendicular to the fall of the flap, then in the same direction (but on the other side of the wheel) wouldn't their energies sum together instead of canceling? it seems to me that this is a different case since the...
by frettsy
Wed Jul 23, 2008 5:19 pm
Forum: General Discussion
Topic: grav lift
Replies: 5
Views: 2915

grav lift

description of attachment (NOTE: not to scale!): think of the green compartment as a "shaft". the red flaps are on hinges so that they can move 90 degrees. at the shown state, the flap on the right is about to fall. when it does, it forces air (gray arrow) into the shaft. this air moves th...
by frettsy
Tue Jul 22, 2008 12:42 am
Forum: General Discussion
Topic: how to make a lighter weight lift a heavier weight
Replies: 4
Views: 1918

interesting! same general concept, yes. do you think yours would work / have you tried to build it? what about mine?

I'm intrigued that you came up with a newer design also.
by frettsy
Mon Jul 21, 2008 9:35 pm
Forum: General Discussion
Topic: how to make a lighter weight lift a heavier weight
Replies: 4
Views: 1918

how to make a lighter weight lift a heavier weight

I refer to my thread "path of least resistance (waterwheels revisited)" - specifically the part about the oil being "forced upward through the hose". now, my attachment. imagine the red plunger as weighing 50 pounds. below it sits 100 pounds of a fluid. the plunger is pushing dow...
by frettsy
Thu Jul 17, 2008 5:04 pm
Forum: General Discussion
Topic: variations on MT 1
Replies: 6
Views: 2329

is it ever possible to use a ball on the rim at 3:00 to raise a ball on the rim around 4:30 to the axle, and have the 3:00 ball end up in the 4:30 position? using a ramp or the "peacock tail" idea or anything?
by frettsy
Thu Jul 17, 2008 2:12 pm
Forum: General Discussion
Topic: Fluid Droplets Moving Uphill
Replies: 2
Views: 1490

Fluid Droplets Moving Uphill

http://www.youtube.com/watch?v=QyYmi5m83f0

couldn't find anything else about this here, but I think this could definitely be relevant somehow. thoughts?
by frettsy
Thu Jul 17, 2008 2:07 am
Forum: General Discussion
Topic: here comes the rain again
Replies: 19
Views: 5856

here is another (very simplified) variation of the solar water wheel, Jim: make something like the standard MT1 wheel, with 8 compartments. make them watertight, fill each one with the same amount of water. put your left half in the sun and the right half in the shade. watch it go! or. space apart t...
by frettsy
Sun Jul 13, 2008 9:04 pm
Forum: General Discussion
Topic: variations on MT 1
Replies: 6
Views: 2329

interesting. so the 3:15-ball near the rim and the 8:45-ball near the axle are exhibiting the same downforce since they are below 3 and 9? I'm not sure I understand! I agree that the 3 above and the 1 at bottom cannot do any work. I think the next two from the bottom are offsetting. but the other tw...
by frettsy
Sun Jul 13, 2008 7:25 pm
Forum: General Discussion
Topic: variations on MT 1
Replies: 6
Views: 2329

variations on MT 1

here I have drawn a new design over MT 1, please disregard the original spokes and balls as I used them only as a guide for the new design. the blue and red "boards" and the purple "weights" comprise the wheel. the idea is to make the ball roll to the right higher on the downside...
by frettsy
Sun Jul 13, 2008 3:48 am
Forum: General Discussion
Topic: the weights hit the wheel
Replies: 12
Views: 3507

Re: re: the weights hit the wheel

broli : btw, thanks for bringing the MT drawings here. I had not seen them before but now I'm checking them out on the wiki. both of these seem very workable and efficient. MT 48: "an insufficient number of spheres is carried to the wheel A by means of the paternoster"... but why? it seem...
by frettsy
Sat Jul 12, 2008 9:39 pm
Forum: General Discussion
Topic: the weights hit the wheel
Replies: 12
Views: 3507

it does look a bit similar. think of mine like the tumbler of a washing machine, but we are "tumbling" the weights to the top after they have done their work, and then dumping them over the ratchet axle again towards the top. while the two pairs of weights will cancel each other out or sta...
by frettsy
Sat Jul 12, 2008 8:45 pm
Forum: Off-Topic
Topic: WM2D or Pintar VirtuaLAB Mechanics
Replies: 0
Views: 1703

WM2D or Pintar VirtuaLAB Mechanics

does anyone know where I can download a free version of either of these programs?

the free version of Pintar VirtuaLAB Mechanics is not available on their website anymore but I can't afford the full version.

I can't afford WM2D either and the demo is very restrictive!