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Georg
The following will be no news to you I'm sure since you have experimented
with a range of Reuleaux polygon rollers.
If you roll a seven sided 50p coin, a Reuleaux heptagon, (the large pre-1997 are best) along a
smooth horizontal plane the coin will initially jump up and down with a
rattling noise. This is because though the diameter of the coin is constant
its centre of mass is not generally at the half diameter point. When the
coin is rolling fast enough the vertical oscillation of the mass centre is
sufficient to lift the coil free of the horizontal surface. The impact
when if falls back causes the rattling.
As the speed decreases there come a point where the rattling suddenly
ceases and the coin rolls smoothly.
This is the point where the vertical oscillation of the mass centre is
insufficient to lift the coin. It only varies the force applied by the
coin to the horizontal plane.
Now we know from the Italian Mooie Energie site that Abeling is
using three weights, effectively a Reuleaux triangle. This gives the
maximum oscillation one can get from a Reuleaux polygon.
When the MI mass oscillation amplitude exceed the resonant frequency
of the MG mass we have positive feedback and the Abeling Wheel will
do the equivalent of the the rattling coin, i.e. it will tear itself to pieces.
Bessler avoided this worst case by using more that three weights.
I think he knew about it though and that is the significance of his
enigmatic three blade diagram resembling a Mercedes car badge.
It is the same instability situation that arises with the transmission
shafts of large electricity generators if the rpm is not increased quickly
enough through the resonant frequency.
The housing of bearing #11 failed to secure the bearing stand and the upper vibration-absorbing pad. The vibration occurred during the bearing adjustment loosened the upper vibration-absorbing pad (the upper half of the journal bearing seat), and the loosened pad fell off (Figure 5a). This decreased the critical whirling speed (resonant frequency) of the shafting, which influenced the bearing vibrations and resulted in structural resonance. The structural resonance caused abnormal vibrations, which led to loose or deformed bearings, housing and bolts (Figure 5b). Violent vibrations at bearings damaged the refueling system. Bearing metal partially melted down because of the interrupted refueling. Violent vibrations also scraped off or deformed the bearing metal. Damaged bearings failed to secure the shaft, which led to the destruction of the rotating shaft due to abnormal axial displacement between the shaft and the housing (Figure 5c).
The damaged generator bearing and seal allowed hydrogen gas to leak out of the generator. The leaked hydrogen gas was ignited, causing a fire (Figure 5d). Most power generating plants use hydrogen gas to cool the electrical windings within the power generator. This improves operating efficiencies by lowering the losses due to the resistance of the windings (windage loss).