One way would be to use a work equation to find the forces, once you've sorted out the geometrical relationship between the x and y locations as a function of theta.
You've got 2 equations and 2 unknowns, assuming thickness is constant and the other dimensions are in multiples of t. Presumably you know how to calculate Iyy and Izz? parallel axis theorem and all that.
I haven't run them in forklifts but have in solar cars and an off grid house, but frankly this seems rotten advice. You can weld with a lead acid battery and it is quite happy. You may get a slight drop in capacity if you run variable currents compared with a constant current, but you won't...
I sort of doubt that UTS is the most important property of the pin material. I'd take a guess that most excavators use something designed to be hit with sledgehammers and covered in wet gravel. Somewhere between mild steel and axle steel.
Yes, you've got twice as much because your power at t=0 is 0, and increases linearly with speed. Hence peak power (which you worked out) = 2 * average power (which was my method).
In reality it depends on the torque vs speed characteristic of your motor and transmission.
Um, Muthu's been here for quite a while.
IRstuff's approach is the right one. w=3300*2*pi/60 rad/s=345 rad/s
I=1/2*m*r^2
r=.3
m=1600
so I=72 kg m^2
KE=1/2*I*w^2
KE=4284900 J
average power to accelerate the flywheel =KE/300=14.3 kW
You'd better check that it seems high. Also, getting constant...
You seem to be talking about a hundred hp, on dynos we either used a water brake or an eddy current brake, or these days a motor/generator. The water brake is comparatively cheap and simple and adjustable, and has no wearing parts. However it won't do 0 rpm and I suspect you'd need to gear it...
Such a shallow shape is prone to Pretzelling or Pringleing, that is why I am dubious about your tolerances. The good news is that when you fasten it to whatever else the thing will happily deform to comply. If you actually need it not to pretzel/pringle then you need some ridges, look at a steel...
"If make it from segments and then weld, then maybe it will make it easier to manufacture?"
No, that would be a path to disaster. Spin it and then maybe finish grind if your tolerances are real.
Easy peasy lemon squeezy. Either stamping for large numbers, or metal spinning for small numbers (tolerances may be hard to achieve). Or of course you could go the 'machine it from billet' route so beloved of hacks (not hackers).
War story 1. A railway company sent out a spec for some beer glasses, intended to be 1/2 a pint. They specified the lower diameter, the upper diameter, and the distance between them. A cluey engineer realised that a frustum was not the minimum surface area, sent in a quote significantly less...