I neglected friction and air drag to keep things simple. Of course you can calculate all of this.
Air drag plays a big role when going fast. Actually a rule of thumb is that you need around 250 Watts to pedal a bicycle at around 20km/h. I don’t know about a skateboarder, could be more or less depending on stance.
Friction of 4 well maintained bearings should not be much and we don’t have belts here.
Rolling resistance of skateboard wheels on smooth concrete? Feels low to me, make a suggestion how to calculate.
Should be more interesting to calculate and read than another post about duty cycle, haha.
Drag of a standing human sideways is D=.5 *rho * v^2 * cd * A
Cd = ~1.2
A = frontal area
If I remember correctly…
The rolling resistance coefficient would have to be measured. It is the ratio between the weight of moving object and the force required to tow it. I dont recall if it was speed related. I do know that there is also a limit of how much torque you could apply before just spinning the wheels.
One little thing you might didn’t realize yet. 2000 watts at stand still results in much more acceleration then 2000 watts at 30 km/h.
I suggest that you should build a board and buy a vesc to do your tests. And when you realize how powerful the boards can be then you want more controlability instead of acceleration from a stand still.
But still the test could be interesting. But please keep it here in this thread and don’t spread it everywhere.
All deeply interesting.
Although, a bit jaded by conflict.
2 such brilliant combatants
of 2 such different passions
would be better working together.
Just remember. Skateboarding, by definition,
is about putting yourself into a situation
that you do not have full control of.
Yet strangely, invitingly,
it is a situation that invites more grace
more insight
than you may be
willing
or able
to control.
Thus, you must love
that it also invites you to
Learn it. Know it. Fully. And fly in its wings.
So don’t fight about it.
Unravel the fight
about what we seek together.