PART THREE - Specification - First Model
The Sunbeam had a unique design that cleverly overcame some design issues
with large size cut electric rotary mowers. This was a full 18 inch design,
but with that cutting width spread over twin rotors. The rotors were not
blade holder discs, but bars, and each held two swing-back blades.

With twin discharge ports, this was an almost symmetrical mower. By 1960
electric mowers were incorporating advanced safety features and the Sunbeam
was at the forefront of electric mower design.

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At least one feature was a very short wheel base (because of two half-size rotors).
This was advertised as an anti-scalping feature - with some credibility; given
Australia's liking for low-cut mowing.

This unique design, combined with a feature of all rotaries (that they would
cut in reverse direction) meant that an unusual mowing arrangement could be
achieved. Essentially, there was no 'front or back' ... and no need to turn the
mower around for the next mowing strip. Instead, the handle was simply flipped
over!

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The most interesting feature was the clever drive system. With a safety
clutch on the motor, and twin shock-absorbing toothed drive belts, this
was a mower designed for longevity. Note how the belts are 'timed' at 90
degrees ... so the rotor blades do not make contact.

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TO BE CONTINUED ...