What Gear Ratio is Needed for a 30-40 km/h Electric Longboard?

[Gurfin321]

I would like to know what gear ratio i would need for my electric longboard. The goal is to run the longboard at 30 - 40 km/h at max power. Me and the longboards weight is approximately 65 kg. The brushless motor i am running has an rpm of approximately 18000 rpm (as it is an airplane engine) and a torque of 1,24 Nm. I would like to be able to go up a 10 degrees incline at 10 - 20 km/h. The longboard wheel is 75 mm in diameter. My question to you is: "How big a gear ratio should i use, and achieve said goals?". I would like to know all formels and equations, and also all the variables. Thanks in advance!
//Josef

 

[cnh1995]

I would like to know what gear ratio i would need for my electric longboard. The goal is to run the longboard at 30 - 40 km/h at max power. Me and the longboards weight is approximately 65 kg. The brushless motor i am running has an rpm of approximately 18000 rpm (as it is an airplane engine) and a torque of 1,24 Nm. I would like to be able to go up a 10 degrees incline at 10 - 20 km/h. The longboard wheel is 75 mm in diameter. My question to you is: "How big a gear ratio should i use, and achieve said goals?". I would like to know all formels and equations, and also all the variables.Thanks in advance!
//Josef

Welcome to PF Josef!.
This section is for introduction only. Post this question in the Mechanical Engineering forum.

 

[Gurfin321]

Welcome to PF Josef!.
This section is for introduction only. Post this question in the Mechanical Engineering forum.

OK! Thanks and sorry! I'm somewhat of a noob here...