A depository for failed and teaching wheel designs.
Moderator: scott
re: A depository for failed and teaching wheel designs.
I just love to see other people's builds! I'll be a compulsive tinkerer til' I die. My Mum always called me "a futer" (footer).... "stop futerin' with the hoover"!!!
re: A depository for failed and teaching wheel designs.
@Ralph and Preston,
You both have very nice models of the Buzzsaw Wheel.
Have either of you (or anyone else) tried the following setup?
8 weights all on right side of inner wheel.
4 weights on left side of outer wheel.
Both wheels turn CW.
Outer wheel geared to be double speed of inner wheel.
At exactly the same time,
At TopDeadCenter,
a Weight drops from outer to inner wheel.
At BottomDeadCenter,
a weight drops from inner wheel to outer wheel.
While it is counter-intuitive to use the inner wheel (with the shorter lever arm) as the driver, note that the un-named inventor keeps the gullets very short, approximately 7 percent of the inner lever-arm length.
If he was counting on longer lever arm for more torque, very long gullets would give more torque, with the weights moving out from the short inner wheel diameter minus half the gullet, to the longer I.D. of the outer wheel, plus half the gullet.
But he kept the gullets as short as possible to hold the axle of the weights only.
Then the outer wheel would be the weight relocater, receiving weights from the bottom, where they fall in at BDC, and delivering them to the TDC where they fall into the inner wheel.
So at the instant of transfer (top and bottom simultaneously), there are 3 weights on the left going up, and 7 on the right going down.
But other than that instant of transfer (with the top and bottom weights not adding any torque because of Zero lever arm), there are ALWAYS 4 weights on the left, being raised by the 8 descending weights on the right.
The "spring lever" ring on the inner wheel would be designed to either keep the weights in position until the right moment for exchange, or push them out with axles against the outer wheel, to overcome the centrifugal force pushing the weights outward from the center.
Has anyone tried this setup with a model?
Dan
You both have very nice models of the Buzzsaw Wheel.
Have either of you (or anyone else) tried the following setup?
8 weights all on right side of inner wheel.
4 weights on left side of outer wheel.
Both wheels turn CW.
Outer wheel geared to be double speed of inner wheel.
At exactly the same time,
At TopDeadCenter,
a Weight drops from outer to inner wheel.
At BottomDeadCenter,
a weight drops from inner wheel to outer wheel.
While it is counter-intuitive to use the inner wheel (with the shorter lever arm) as the driver, note that the un-named inventor keeps the gullets very short, approximately 7 percent of the inner lever-arm length.
If he was counting on longer lever arm for more torque, very long gullets would give more torque, with the weights moving out from the short inner wheel diameter minus half the gullet, to the longer I.D. of the outer wheel, plus half the gullet.
But he kept the gullets as short as possible to hold the axle of the weights only.
Then the outer wheel would be the weight relocater, receiving weights from the bottom, where they fall in at BDC, and delivering them to the TDC where they fall into the inner wheel.
So at the instant of transfer (top and bottom simultaneously), there are 3 weights on the left going up, and 7 on the right going down.
But other than that instant of transfer (with the top and bottom weights not adding any torque because of Zero lever arm), there are ALWAYS 4 weights on the left, being raised by the 8 descending weights on the right.
The "spring lever" ring on the inner wheel would be designed to either keep the weights in position until the right moment for exchange, or push them out with axles against the outer wheel, to overcome the centrifugal force pushing the weights outward from the center.
Has anyone tried this setup with a model?
Dan
re: A depository for failed and teaching wheel designs.
Triplock,i just read your confession of stupidity loved it,it really made me chuckle thank you,Andyb.
Only by making mistakes can you truly learn