Great images of the blades, you can defiantly clearly see the cutters in the pics ,the cutters remind me of pipe cutter blades ,I wonder in these cutters are of high quality steel like pipe cutter blades.
Thanks for the Rotoscythe pics and info, yes the adulterated Rotoscythe bladeholder images are not great examples but I could see the steep angle on those bladeholders showing a fair amount of lift.
Yes the Rotoscythe patent explains a lot,like why the rear discharge mowers require a slightly larger ground clearance at the back of the mower when cutting long grass ,it's to avoid clogging of the cutters by the grass.
The patent mentions when cutting a fine lawn you are better off having the cutter plate parallel with the ground.
The Victa 18 blades I showed previously ,I should mention those blades are factory made and are factory press shaped blades so I did not want anyone trying to make those blades , as you can fracture or crack the Victa blades by bending them,if you weaken the integrity of the steel you could possibly kill someone by the blades breaking off .
The interesting thing about the Victa 18 discharge blades I previously posted they show an example of reversible blades, it's impossible to fit these blase the wrong way up just like the completely flat Victa 18 blades.
I would say it's definitely an advantage to have some lift by the blades when cutting long grass with a rotary slasher or mower so that the grass can be discharged away from the blades which stops the blades clogging with grass and also prevents the engine stalling.
As a preteenager I learnt about leading and a trailing edges when making home made boomerangs out of plywood packing crates. If you get those leading and trailing edges wrong it makes a huge difference.
I saw one patent which had an addition to the cutter assembly, to stop long grass ,vines ,etc from wrapping around the cutters and cutter bar shaft .
Patent with a line trimmer from the fifties.
Definitely interesting all the different blade designs and conversation .
