Greetings folks,
It appears to me that the issue of lift for catching went down
two paths - one building lift into the bladeholder; another
building lift into the blades. The combo blade clearly won out
with Turner.
Not quite two paths as in branching - more sequential developments. Combo blades came first, followed by fluted discs used with combo blades. Edit: Thanks to CyberJack, I now realise I need to qualify the statement above, to add "in the Australian market post-1950's".
Victa introduced their first fluted disc for the 1974-5 season [from your History Section brochure]:
![[Linked Image]](https://www.outdoorking-forum.com.au/forum/uploads/usergals/2016/02/full-5630-27183-victa_fluted_disc_1974.png)
This exact type of disc is fairly rare now, as it was found that object strikes caused bent crankshafts. So a recall was done, and most were replaced. The replacements had a flute that was more of a 'swirl' than the 'wave' that the pictured disc has.
I think the fatter fluted Turner blade (Fan Type) came in with the
Turner 'V' base - the first of the Big names to introduce a high-arch.
Gadge, I guess the fatter blades replaced the earlier, thinner flutes?
The 'Fan' type blades came in with the rear catcher Turners - one of those ads says that the 'Sapphire' model was fitted with them. So that pic doesn't show the actual Sapphire disc/blade set.
The side throw model blades had less aggressive flutes, and continued on with those.
Turner took out patents specific to their Sapphire and Valiant models, too. CJ, check your PM's for links to these.
