I have recently noticed that this type of effect appears to go back to the 1920's, at least:<<During the 1920s, Thomas Townsend Brown was experimenting with an x-ray tube known as a "Coolidge tube," which was invented in 1913 by the American physical chemist William D. Coolidge. Brown found that the Coolidge tube exhibited a net force (a thrust) when it was turned on.
Quote from: frobnicat on 09/27/2014 09:53 pmSo far my feeling is that the "propellantless propulsion proponents" are doing a really great job at NOT convincing an (admittedly already reluctant) mainstream science community that there is any effect at all. ...I agree, that is my reaction as of late, with many exceptions. Notably, Paul March
So far my feeling is that the "propellantless propulsion proponents" are doing a really great job at NOT convincing an (admittedly already reluctant) mainstream science community that there is any effect at all. ...
....
I was given this windup toy by a Swiss friend ...
An Italian:
The frictional rolling of a driven wheel against a surface always comprises a "stick" region at the leading side of rolling motion and a sliding region behind it.
where the motion is ... due to self-excitation.
Quote from: Rodal on 09/28/2014 03:34 pmI was given this windup toy by a Swiss friend ...Yahbut: This has nothing to do, that I can tell, with the whirly bird device. ....
Itīs a bit unfair of Frobnicat to demand specific answers from us that only a few people WORKING on those experiments can effectively give, and then say we are not helping the cause.
Quote from: JohnFornaro on 09/28/2014 08:29 pmQuote from: Rodal on 09/28/2014 03:34 pmI was given this windup toy by a Swiss friend ...Yahbut: This has nothing to do, that I can tell, with the whirly bird device. ....Well, if you are going to argue that the analogies I presented are not perfect analogies, I concede that point: ...
Exsqeeze me on my ineptitude, but I am not following. We're talking about a wheel. Break it down for me, willya?
I think I see. I can get on a railroad flat car, and jerk backwards. The car will move forward. If I coast with it, gradually bringing my body forward at a rate of less than the "sticky friction", I will get to a point where I can jerk backwards again, and I can thus "propel" the railroad flat car forward.Is this correct?