Also with the 4 mowers you showed before, the Rover 18" Major is similar to, but not as much as the others.
Hi Kye
Yes, I do not place the Rover in this specific category.
It is simply a lawnmower influenced by the 'off-set wheel American design'.
---------------------------I do want to say something in response to your great observation about the
connections between the designs like the Whirlwind Sabre.
To my knowledge, it was Mason & Porter's (Masport) Rotocut that introduced
this Lawnboy chassis to Australasia. This was Masport's first rotary, and
it was introduced for the 1955-56 season.
On the Australian mainland, the first take-up of the design was L.J. Phillips'
Whirlwind Sabre of 1956. I do believe the direct influence for the Sabre was
from Masport (not Lawnboy). I point out that, in the early-mid 1970s, Whirlwind
became ...
Masport-Whirlwind, and within a few years, simply Masport (Australia).
My best guess is that a Masport-Phillips arrangement introduced the
Lawnboy design to these shores.
Both
Pye-Tecnico and
Qualcast were later users of the design.
The Pye-Tecnico machine is interesting in that it has Kirby's first rotary
lawnmower engine - the Kirby 2-stroke GE-A1, a licensed Canadian
Johnson/Ironhorse used by ... Masport. It is the Kirby recoil starter that
appears to be used on the Sabre (fitted with the Villiers). This would mean
that Kirby introduced the lawnmower recoil starter to Australia!
The
Qualcast route to this off-set design is probably different in that
these were fully imported machines (in the late-1950s). This suggests
to me a more direct route between UK's Qualcast and the USA's Lawnboy.
I might also add, that Qualcast used the off-set design in their
rotaries way beyond their dated use in this country. Why?
The Off-set Wheel DesignLet's say about half-a-dozen AUS manufacturers experimented with the
offset-wheel design in the 1950s. An obvious question is why this
design preference did not survive to see the next decade?
I have seen someone ask the question: "what was the advantage?"
The better question is, "what was the disadvantage?"
Australia
rejected the offset-wheel design because it was too difficult
to accommodate what Australia
accepted - the single-point height adjuster.
I think it is a fair statement in saying that Australia led the world in
domestic rotary mower design in the 1960s and 1970s.
The single-point height lever was entirely suited to our conditions,
and much more convenient to use! To have this system on offset-wheel
chassis made no sense at all. Here, we adopted the conventional four-square
base, that easily matched the lever and segment design. Victa had this
from 1960, and all the key players followed suit.
It is that story that makes the Sabre so desirable - a talking point -
because of its most unusual look.
-----------------------
Jack