Howard Johnson Replication Tube Claim

[mikestocks2006]

Interesting quote as the Botom plate with the stubby sticking upwards that enters the Bearing is only so long anyway, so do not see whay this would matter ?

It could be a double row bearing
e.g.
http://www.supbearing.com/double_row_angular_contact_ball_bearings.htm
it would also explain the vertical alignment/stability if only one bearing is used.
The outer race total thickness is much wider too, as opposed to single row similar bearings.

[hansvonlieven]

G'day all,

Here is something from my files that you might be interested in. It is a lab report of tests with one of Howard Johnson's magnetic gates. It has detailed drawings of the gate's construction, something not found elsewhere.

Have fun

Hans von Lieven

I had to upload it onto my website since the file is too big to be uploaded here

The url is Http://keelytech.com/overunity/johnsongate.doc

[CLaNZeR]

CLaNZeR,

Do you have something similar to mylow's device with low friction bearings? If so, then could you please do a simple experiment that mylow continues to ignore despite all the times I've asked him to do. Get the machine spinning at the same rpm shown in mylow's video, and see how long it will spin. If your stator PM is stronger than mylow's then please replace it with a similar PM or remove it for the test.

Thanks so much!
PL

Hi Paul

With the weight and size of that Rotor and no load I could mount that on some low friction bearings and guarantee you a Wind Down time from a low REV count of about 100 RPM and it will take a very very long time. Can tell you this from experience.

I have not seen any weight measurements from Mylo so difficult to try emulate it by weighting a different wheel and do winddowns though.

I am going to use the same bearings I used on the Modrasek Replication, but will probably only need one.

http://www.overunity.org.uk/mgw.htm

These are not low friction bearings but smaller than Mylo's and using two like I did on this replication still gave over 10 minutes wind down from 50 RPM (Yep 10 Minutes, Yep 50 RPM).

It will give a base line for the unloaded Rotor winddown, but the whole point with Mylo's is that we do not spin it up in the first place anyway and it is meant to speed up to it's optimun speed.

The usual Laser Tacho will be pointing at it, if she goes "IF"

Cheers

Sean.

[PaulLowrance]

Thanks for info Sean!  That's what I was thinking, very long spin times. Also, by moving the weight (PM's) on the outer edge, you're not increasing the weight on the bearings, but you're increasing the momentum, which means it should spin even longer, if it's balanced well enough.

A self-starting (not pushing it) would be great, but I'm thinking most of the demagnetizing would occur from just keeping it spinning for a long time. So the reason for asking how long it would spin is to get a rough idea how much energy is required to keep it spinning for say 27 hours and then compare that to the energy contained in the PM's.

PL

[CLaNZeR]

Thanks for info Sean!  That's what I was thinking, very long spin times. Also, by moving the weight (PM's) on the outer edge, you're not increasing the weight on the bearings, but you're increasing the momentum, which means it should spin even longer, if it's balanced well enough.

Yep people have to realise that when seeing a 3 minute, 6 minute or even 10 minute video on Youtube when there is no tach measurment being shown, that these could be simple flywheels they are seeing. Loose enough and balanced well to do very long winddowns.
The video is a  illusion that the Rotor is spinning at a steady speed, when in fact it is dropping the RPM very slowly.

A self-starting (not pushing it) would be great, but I'm thinking most of the demagnetizing would occur from just keeping it spinning for a long time. So the reason for asking how long it would spin is to get a rough idea how much energy is required to keep it spinning for say 27 hours and then compare that to the energy contained in the PM's.

PL

Be great if Mylo had a Hall sensor and measured over that 27 hour period from the Stator/Armature magnet. We then would have a good idea of how long that Iron lasts and how much energy it takes to re-charge it when back at the shop. But I dought if we will ever see those figures.

I am going to try Ferrite and Alnico stator magnets and the interesting thing is when you compare the working temperature of the two, the Alnico's can go well high. Could this be a factor? who knows at this point.