Useful calculators/spreadsheets?

[Knufire]

Paul Copioli's spreadsheet: http://www.fightingpi.org/Resources/...culations.xlsm

Does chain C-C distances, air capacity calculations for those using offboard compressors, and some more detailed drivetrain modeling compared to JVN's spreadsheet.

Accompanying presentation (and a few other useful ones as well) are on Team 1718's website: http://www.fightingpi.org/Resources/...Seminars.shtml

[Monochron]

Isn't a calculator, but it counts as a spreadsheet:
http://www.chiefdelphi.com/forums/sh...d.php?t=128531

Gives most all specs of different motors and most all gearboxes relevant to FIRST. Includes a couple equations but you have to do the math yourself.