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Model Forum / Radio Controlled / Land Models / November 2003Please help me with my motor
Thanks :O) ok I have a trinity x-star which I understand is quite an old stock motor. I don't know much about it tho because it is from a car I got off ebay (schumacher fireblade usa). Anyway I was wondering how it compares to other motors. I mean it does seem faster than my friends tamiya (with the standard 540) but I thought this was meant to be a 27t too so I don't see why it is so much faster. so compared to for example a 17 quad how much slower would mine be compared to it? any extra info about this motor would be greatly appreciated too. Thanks in advance, Alex the RC Newb Kinda why my wifes 4cylinder Lancer can wipe the floor with my 6cyl chevy. The ol' mabuchi "silver can" stock motor is a classic study in inefficency. A properly designed 27turn motor with balanced & lightened armature, Quality brushes, and really good magnets will run noticeably better than a mabuchi ( and probably my chevy...) And your old (or any, for that matter) stock motor will be much slower than a 17 turn. Fewer turns, faster motor, shorter battery life. BTW, (Winds vs Turns) more windss really only adds a flywheel effect. A 17 turn single is fast and accelerates very fast. A 17 turn quad is fast, but accelerates slower because it has to spool up the extra weight of the additional winds. As long as your brushes are good and your commutator is clean, your 'stocker' should be fine. Its not a bad idea though to get a cheapo 17-23 turn mod motor for bashing around and experimenting. > Thanks :O) > [quoted text clipped - 14 lines] > > Alex the RC Newb > BTW, (Winds vs Turns) more windss really only adds a flywheel effect. A 17 turn single is > fast and accelerates very fast. A 17 turn quad is fast, but accelerates slower because it > has to spool up the extra weight of the additional winds. I've always wondered why the higher wind motors had better "top end". Is it because the windings are more dense and are packed against the poles better? If i had to guess (and i do...) id say it was more of an efficiency thing. guessing here: more turns creates a stronger field - both in a motor and in a generator. When a motor spools up, the coils passing through the mags act as a generator - trying to force current the opposite way. Thats why motors are strongest at 0rpm. Theres no reverse current fighting it yet. It also limits the speed. when the reverse current approaches the input current, the motor approaches a steady state. lower turn motors have to be going faster before the reverse current approaches the input, hence, they go faster. Sooo, i theorize that because they have fewer turns, they are generally not as torquey. Anybody care to discuss? Theres usually lotsa folks here that really understand this crap, but its been quiet lately. Maybe somebody will pop back in... > > BTW, (Winds vs Turns) more windss really only adds a flywheel effect. A 17 > turn single is [quoted text clipped - 4 lines] > I've always wondered why the higher wind motors had better "top end". Is it > because the windings are more dense and are packed against the poles better? > I've always wondered why the higher wind motors had better "top end". Is it > because the windings are more dense and are packed against the poles better? Here's the thread from when we discussed this back in '99, when Tom Younger and Elvo were around: http://groups.google.co.uk/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&threadm=Pine. SUN.3.96.990420174736.24508K-100000%40thetis&rnum=2&prev=/groups%3Fhl%3Den% 26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26q%3Dwinds%2Btom%2Bgroup%253Arec.models. rc.land%2Bgroup%253Arec.models.rc.land%2Bgroup%253Arec.models.rc.land%2Bgro up%253Arec.models.rc.land%26btnG%3DGoogle%2BSearch%26meta%3Dgroup%253Drec.m odels.rc.land Re-reading it though, I can't see any clear conclusions... maybe someone would like to spend more time than I'm prepared to, and post a summary... HTH! Jonny > http://groups.google.co.uk/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&threadm=Pine. > SUN.3.96.990420174736.24508K-100000%40thetis&rnum=2&prev=/groups%3Fhl%3Den% > 26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26q%3Dwinds%2Btom%2Bgroup%253Arec.models. > rc.land%2Bgroup%253Arec.models.rc.land%2Bgroup%253Arec.models.rc.land%2Bgro > up%253Arec.models.rc.land%26btnG%3DGoogle%2BSearch%26meta%3Dgroup%253Drec.m > odels.rc.land wow...what a mess. here it is again: http://tinyurl.com/ul7n FWIW....jonathan...check this out: www.tinyurl.com > http://tinyurl.com/ul7n > > FWIW....jonathan...check this out: > > www.tinyurl.com D'oh, forgot about tinyurl (or www.makeashorterlink.com). That's what comes of trying to cook dinner and post to Usenet at the same time... Thanks! Jonny >http://groups.google.co.uk/groups?hl=en&lr=&ie=UTF-8&oe=UTF-8&threadm=Pine. >SUN.3.96.990420174736.24508K-100000%40thetis&rnum=2&prev=/groups%3Fhl%3Den% >26lr%3D%26ie%3DUTF-8%26oe%3DUTF-8%26q%3Dwinds%2Btom%2Bgroup%253Arec.models. >rc.land%2Bgroup%253Arec.models.rc.land%2Bgroup%253Arec.models.rc.land%2Bgro >up%253Arec.models.rc.land%26btnG%3DGoogle%2BSearch%26meta%3Dgroup%253Drec.m >odels.rc.land is that meant to launch a webpage or an ICBM? ;) Thats brilliant thanks a lot for that. Alex > Kinda why my wifes 4cylinder Lancer can wipe the floor with my 6cyl chevy. > The ol' mabuchi "silver can" stock motor is a classic study in inefficency. A properly [quoted text clipped - 31 lines] > > > > Alex the RC Newb Brilliant? maybe if i understood *why* i would accept that. Im only repeating what ive read 100 times already. 8) > Thats brilliant thanks a lot for that. > [quoted text clipped - 47 lines] > > > > > > Alex the RC Newb |
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