Posted by Brett Smith (203.38.223.82) on July 10, 2003 at 17:36:21:
In Reply to: Re: Drawing from Grim posted by grim on July 10, 2003 at 16:22:29:
Gentlemen, (and I hope Ladies),
Please be aware that the drawing posted by Grim through Scott, was sent to me in Australia by Grim, he asked me to constuct and assemble the various parts as designed by him. The device, if assembled as per the drawing "will" self start, but it is very important and nescessary to experiment with the weights, weight pivot position, weight stop positions, spring tensions, lengths, angles and above all the "timing" of weight transfer, many hours were spent playing with all of these "variables", the result is a device which is quite "viscous" and "destructive" in its operation, so keep your fingers out of the way!! The disk I used was only made of 3mm perspex and subsequently cracked at the weight pivot and stop mounting points. Please also be aware that Grim has never claimed this to be "IT", although in my opinion its a damn good attempt. I also believe that if a four mechanism unit were constructed, the action would be considerably "smoother" and less destructive, however this may also upset the centre of gravity position so experiments will have to be carried out, I have no formal physics or mathmatics training so I can't give figures to the learned amoungst you. I don't believe this design to be as Bessler himself desined although I have no basis for this assumption appart from its "simplicity". The current device Grim is working on is not the one he has posted here although some of the fundamental "principles" are similar, we will have to wait for the outcome of the "physical" testing, I'm sure Grim will keep us posted. For those of you experimenting with computer aided designs, I feel you may be better off constructing a physical model, there are just to many variables. Some of you may remember me as the one who constucted a miniature version of Aldo Costa's wheel, on paper and computer screen it looked very promising indeed, but when a hand built model was constructed I found many points of friction that could not be modelled by computer, or at least by my meagre computer skills. Please keep at it, we have to collectively do our best to solve this 300 year old conundrum.
All the best.
Smithy.
: : Here is the drawing Grim sent me. Thanks Grim!
: : Now I want to be perfectly clear about this, Grim. Are you saying that this design turned by itself until the parts wore out? Please be honest with us.
: : Thanks,
: : Scott
: :
: :
: : : The drawings you asked to see have been sent to Scott.
: : : Smithy in Australia was able to reproduce this thing from these, by e-mail, so you shouldn't have much trouble.
: : : Beware of flying parts. This is NOT the current design.
: : : Regards
: : : grim
:
: Hi Scott
: It ran until the parts FLEW OFF, not WORE OUT. It BROKE ITSELF. Five to six turns to self-destruction.
: VERY jerky movement, very violent. Why would I not be honest? I could've mentioned this
: a long time ago, but I felt it to not be the "smooth startup" of JB's wheel, as I explained. It's an old
: model dealing with what I tried to say the flaw in unbalanced wheels was, i.e., weights not lifted off the
: bottom perimeter to make a wheel unstable.
: The second-class lever formed by the lever arm and six-ounce weight was assisted by the "helper" spring to raise the weight off the bottom outside stop about 3/4".
: Near the same time, the upper weight became unblocked from the inner stop and tried to "Tarzan" to the perimeter, with the leverage from the six-ounce weight and lever arm
: driving it. The spring at that point slowed the weight's free swing and stored the energy it needed to become the "helper" spring at the bottom, assisting the weight/lever to pull
: the large weight up off the bottom stop at the proper time.
:
: Regards
:
: grim
: P.S. The drawing you posted was "Modifications", stop pins adjusted and springs lengthened for clearance.
: Smithy in Australia reproduced it and got the same result- Self-Starting Destruction