Automated lawnmower rope circular mowing method - GIF

Automated lawnmower rope circular mowing method.

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Previously:

https://www.homemadetools.net/forum/...623#post143386
https://www.homemadetools.net/forum/...098#post138114
https://www.homemadetools.net/forum/...465#post135654
https://www.homemadetools.net/forum/...2421#post76333
https://www.homemadetools.net/forum/...197#post130503

I guess he's never heard of Archimedean spirals. Replace that rod in the center with a 55 gallon drum or similar and it would cut the whole patch instead of cutting and recutting the same path.

Drum dia: 1/3 of the cutting blade width okay with you, Marv? :)

Quote:

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Originally Posted by DIYSwede

Drum dia: 1/3 of the cutting blade width okay with you, Marv? :)

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Well, the bible says pi equals three so, yeah, 1/3.

Quote:

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Originally Posted by mklotz

Well, the bible says pi equals three so, yeah, 1/3.

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Just wanted some safe overlap, but then that's just me - as my late granddad hated to see any ridges in a freshly cut lawn...

There's a bunch of silly physicists that still use 22/7 for most calcs. It's close enough when you're usually starting with data that has a 10% or greater error band built in.

Quote:

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Originally Posted by Crusty

There's a bunch of silly physicists that still use 22/7 for most calcs.

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Well this physicist doesn't. I long ago memorized pi to the number of places the computers of my younger years could handle - 3.1415926535898

But if you want a rational fraction approximation, the best one is 355/113 = 3.14159292035, an error of 0.000008491 % !

The mnemonic I used to teach my duller students was to write down the first three odd numbers twice in a string (113355) and split it down the middle to form two three digit numbers (113 355). If you can't figure out how to divide these two numbers to get a number close to three, you have no business fooling around with advanced mathematical concepts like pi.

Heh heh. Pi are round, cornbread are squared.

I was gonna say, I used to make a really tasty pecan pi. Recipe was on the back of a Karo syrup bottle.

I tried that lawnmower on a rope trick when I was a kid but I couldn't get my younger sister to push the reel type push mower for more than 1 revolution so gave it up as a bad idea