Soooo, if you do a bad job of design, a failure can cause bodily harm to the driver and/or others on the track.
Not thinking you will get many takers here.
Either get a degree in mechanical engineering or pay one to design it for you.
Send a napkin sketch of the gear you need to rushgears.com. Tell them how fast you have to have it and they will ship you the gear. Just be sitting down when you get the quote and have a cardiac specialist standing by. But if you need gears tomorrow you can have them.
I believe that symbol is Symmetry. A is the datum reference, Assuming that is the 11 inch bore.
The .025 is the WIDTH of the tolerance zone. The center of the tolerance zone is the theoretically perfect center of the bore.
Units are whatever the drawing is in. I assume mm. Yep that is a tight...
On the chance that you actually understand the way the world works. Ha Ha. Good one.
In the (in my opinion) more likely case that you don't.
The windmill on the roof of the car creates drag. The amount of drag created by the windmill will ALWAYS be greater than the amount of electricity...
If you want to see an example of how far down the rabbit hole someone can go. I offer this link as a cautionary tale.
Note I called it out as a free energy boondoggle on reply number 4. It went for 8 YEARS and...
Spend your time and money studying thermodynamics. Especially the part about the Second law of thermodynamics.
If you want the reader's digest version.
1st Law: energy is neither created nor destroyed. Break even is the best you can do.
2nd Law: No free lunch you can't even break even. You...
I'm going out on a limb here and say if South bend designed it to do 4 tpi. It can do 4 tpi and not break the first time you try it.
Of course the lathe is now 75 years old with an unknown maintenance history.