Hi Ty and VM members,

Great research! I've never seen a side-shot before of the Mohall.
Yes, in my books, the Mohall is the first AUS petrol powered vertical shaft rotary.
It would have had a Hall marine motor.

I do want to make one point relevant to Ty's project.
There is one other thing I believe Hall gave Richardson ... the idea for a cheap base.

The story goes that Hall used an old, heavy plough disc.
Richardson, I believe took this idea and made it lighter.
He had his bases formed from a lighter gauge steel.

This 'toe-cutter' utility base defined the look of many 1950's rotaries,
but it stifled the development of the catcher.

The downside is, in terms of the development of the catcher, these bases were
entirely unsuitable. Yet Victa stuck with them for the whole of their first decade.

The Americans and the British had already grasped the idea that you needed a skirted
base of more depth to effect a chute for directing grass flow.

It would be other AUS makes that would see this.
Here, the Clyde and the Collect-O-Matic were, I think, the key players in
early AUS catcher designs. We're talking 1956.

All very interesting.
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JACK

Last edited by CyberJack; 06/12/13 11:47 PM.