Gadge is spot on with regards to how the offset 4 blade system would work..The odd thing though is, what was Victas true intention for this, since the Specials nor Rotomo were fitted with side throw chute or catcher option until the Sheerline 3 years later.
Probably a bit of forward planning on Victa's part, to reduce the number of different carrier types, and hence reduce warehouse and dealer inventories.
Directional throw Would be most likely. Incidently, of the few hundred specials, Ive passed on, not one had 4 blades fitted. Why?
No practical advantage to fitting them, on a non-catcher deck. This is due to the thrower blades being set higher, so they don't do any cutting.
Four blades are better than two, if they are all at the same level, though. My SupaSwift Big Bob handles heavy growth better, and leaves a better finish, with 4.
