Assembly
#21
Im not trying to start a flame war here, so please dont take it that way.
Isnt the purpose behind the counterweights to offset the weight of the rotors on the lobes of the eccentric shaft? I see a potentialy damaging setup. Especially in an old school 13b their the rotors originally weigh at least one lb more than the FC rotors each.
Isnt the purpose behind the counterweights to offset the weight of the rotors on the lobes of the eccentric shaft? I see a potentialy damaging setup. Especially in an old school 13b their the rotors originally weigh at least one lb more than the FC rotors each.
#24
Originally Posted by BDC' date='Jan 5 2004, 08:00 PM
Could you please explain to me why from a physics standpoint how changing the outer rotational balancers, as a pair, will make the entire shaft assembly wobble?
I've been running this same combination for almost 20,000 miles now, with many revs, without any hitch.
I don't understand where you're coming from here from a technical standpoint ..
B
I've been running this same combination for almost 20,000 miles now, with many revs, without any hitch.
I don't understand where you're coming from here from a technical standpoint ..
B
From a physics standpoint, the counterweights are there SPECIFICALLY to counteract the imbalance of the rotors relative to the shaft. Remember how the rotor lobes on the ecc are not centered(hence eccentric shaft)? The rotors were about 8 oz diffreent between S4 and S5, while the counterweights are different by about 2 ounces.
Yes its important to have matched rotors and counterweights, but it will not grenade an engine(unless you mismatch the rotors). It will, though, lead to greatly accelerated main bearing wear, and undoubtedly extra stresses on the motor.
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