The Model one has a diagram and a V code...But effectively its a prototype used in production, and was only intended to quickly fill a gap until the first Victa engine was released. So as you say "it was done on the run". All the failures they found were also amended by early Roto 2. Barrel head carby axles and QUALITY.
Head was to thick affecting cooling, barrel and crank cases were very poor, ports were partially blocked, brass nut expanded with heat and loosened. Front axles bent easily and rear axle had no lateral support causing excessive wear. The model 1 in my opinion was effectively just the "Break in Model"
The Time to pump out 8000 model ones would have been over in the blink of an eye and with the knowledge of the new Victa engine there would have been no time nor need to produce a seperate breakdown or parts list as, A the majority of parts are interchangble and B, They had no name on the Engine. All amendments are in the First Victa Manuals.
So time and cost played a major part.
Many people for years said it was a Hurricane engine....Rubbish. It was a prototype made for/by Victa and put into service to assess its reliablity. Another reason not to have a name....In case it failed!
