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Nick
Experienced Roboteer
Joined: 16 Jun 2004
Posts: 11802
Location: Sydney, NSW
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You also have to think about the shock damage to the motor, particularly if you are gearing it with belt drive. The plane starter motors are not noted for their long-term strength and if you are loading it heavily, it will eat up your batteries and generate much heat.
No matter what type of motor you use it will always be more efficient to use a single large one rather than multiple small ones: There is more mounting cases, bearings, brushes, wiring etc and you might not save much money.
IMHO, a 4.5Kg disk is too much in a feather, Plan D and Jolt are using around 2Kg weapons and we both could do with spare weight for other things like armour and batteries. With 33% of your weight limit taken up with a weapon, you will be sacrificing some or all of the other essentials like armour, power or locomotion.
A large mass also takes much longer to spin up - even with a mag motor geared 2:1 and only 1.8Kg of weapon, Jolt still takes 3 to 5 seconds and Orbit with a 1:1 geared EV Warrior takes quite a bit longer.
Another good reason to use a larger motor is the larger shaft size; The HTI, Mini EV and Dewalt motors only have 5mm shafts, while the RS5xx motors have 3mm or 1/8". I know Jeff Ferrara had trouble getting larger pulleys for a 5mm Dewalt shaft and a 3mm shaft will bend before the belt is properly tensioned. If you go up to an 8mm or larger shaft, then there are many more options open to you. _________________ Australian 2015 Featherweight champion
UK 2016 Gladiator champion
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Wed Sep 21, 2005 3:45 pm |
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