RC-Monster Forums - View Single Post - E-Lawnmower Think Tank

BrianG · 05.11.2010, 07:20 PM

@feisty: I can't see the article, but the fact they provided Ardino code tells me that it probably is an automatic setup. I want to make an R/C one.

@hoober: Blades that size are going to take some serious power. The electric one I saw was rated at 18A @ 120v AC (which is ~2HP) using an 18" deck. Assuming that level of power actually is adequate and power scales linearly with blade size (probably not), 46" blades will require over 5HP each. Three blades = 15HP. Even with something crazy like 100vDC (27s lipo), the current draw will be 112A constant. To get any kind of decent runtime, that's gonna require serious capacity. Yikes.

My yard is really small so I'm thinking about making something based on an 8th scale truggy with a converted gas trimmer head mounted to a custom deck.

	(#9)
BrianG RC-Monster Admin Offline Posts: 14,609 Join Date: Nov 2005 Location: Des Moines, IA	05.11.2010, 07:20 PM @feisty: I can't see the article, but the fact they provided Ardino code tells me that it probably is an automatic setup. I want to make an R/C one. @hoober: Blades that size are going to take some serious power. The electric one I saw was rated at 18A @ 120v AC (which is ~2HP) using an 18" deck. Assuming that level of power actually is adequate and power scales linearly with blade size (probably not), 46" blades will require over 5HP each. Three blades = 15HP. Even with something crazy like 100vDC (27s lipo), the current draw will be 112A constant. To get any kind of decent runtime, that's gonna require serious capacity. Yikes. My yard is really small so I'm thinking about making something based on an 8th scale truggy with a converted gas trimmer head mounted to a custom deck.