Well I think I'm well and truly sucked in to this hobby. all my calcs below are approximate of course and don't take into account temp, humidity, wind, traction, blah blah blah
Engines ====== I was thinking of using two 18v right-angle drills as a power source, but am having trouble "estimating" battery life, and required torque. The model I am looking at has 33Nm (292Lb-in) of torque, is two geared of 450/1400rpm, variable speed, and fwd/rev of course. It is specified as 300watt of input power and 18v. I calculate this to be 16.66amps (at full power) 300watt / 18v = 16.66amps Battery Life ======== I calculate with a 3.0ah battery that is 0.18 hours of runtime, or 10.8 minutes, again this is at full power. So 20.0aH would yield 72mins (ah / amps) = hours of runtime Torque ===== on low gear (450rpm) at full speed with a 9cm diameter drive wheel that is 7.63kmh (4.74mph) high gear (1400rpm) is 14.76mph (if it can move the thing on this gear) how can I calculate (or does someone know from experience) if this thing will actually pull a 100lb behemoth up a 45 degree hill (on low speed of course) :-) Other ==== Is anyone using Li-ion batteries? Do I have any of my calcs wrong? Am I totally nuts and thinking to much? Cheers, Ben PS: tank will probably be a Tiger --~--~---------~--~----~------------~-------~--~----~ You are currently subscribed to the "R/C Tank Combat" group. To post a message, send email to rctankcombat@googlegroups.com To unsubscribe, send email to rctankcombat-unsubscr...@googlegroups.com Visit the group at http://groups.google.com/group/rctankcombat -~----------~----~----~----~------~----~------~--~---
