Yes I find all the different blade designs interesting ,thanks for the blade info. Jack and Gadge.
" I think we need to look at sickle bar blades as closer to neutral lift in design."
I'm not sure on that Jack ,a lot of blade design specs that I have read say DO NOT grind bottom of cutting edge. This will cause poor quality of cut and high horsepower requirement.
My understanding was if you grind the bottom edge of the blade instead of the top edge, the blades can't lift the grass causing the base to clog with grass and stalling the engine unless you have a larger more powerful engine.
Glad to be corrected on this if it's wrong it's just my understanding from the text I've read.
It would be an interesting test to sharpen the wrong side of the blade on a SupaSwift Big Bob mower.
The early forties Goodall slasher was the American slasher I was thinking of that used the same type of blade as the Whirlwind.
I saw a couple of YouTube clips showing the lift of the grass with standard blades and mulcher blades.
Another Interesting article I was reading was on self sharpening blades ,as the blades wear they sharpen by using different types of steel in the blades ,the weaker metal wears away thus keeping a sharp edge.
