Building an electric start

[Gordy]

I use an old Texas instrument. Lol

I used to have a TI-84-C Silver Edition Plus graphing calculator. I gave it to a friend for his college work. Great calculator. I also programmed Tetris on it lol

 

[Dogsoldier]

Mine is so old the numbers are worn off! Lol

 

[Stingerbro765]

I didn't use any calculator

I missed clicked the other thread nvm

 

[Stingerbro765]

I was advising that if you want to run a single speed motorized bike without pedals, you need a strong motor, with a relatively high reduction ratio. Apologies on the incorrect datum. Assuming a phantom 85, a 26 inch wheel, and a 44 tooth sprocket, thats about 32 mph at 7.5k rpm, and 40mph at 9.5k.

What calculator did you use

 

[cloakedvillain]

((RPM/reduction ratio)*measured wheel diameter*pi)/1024

Or this https://www.omnicalculator.com/everyday-life/rpm