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If you have a digital caliper you just measure the width and diameter of those bearings. Since it's a 4mm shaft the I.D. is already known. I'd be interested to know those measuerments if you ever measured them. |
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okay here are the numbers for the cs10 blade fan
So i bought a pair of hobbypartz. edf specials. They had motor/fan/ esc with 4 servos for 70mm edf jet for $47 bucks. The motor is 3000kv Detrum brand.
On 4s with the cs10blade fan its about 60amps forgot the watts. ON 5s using gen ace 3800mah 25c pack it put 99amps down and over 1700watts. My speed control is rated at 60amps with im sure 70amp burst, So did not hold the throttle too much just few seconds. It sounds really nice and crazy amount of power. I think on 4s its a safe set up with the motor and esc I have, I really liked the way it sounded and pulled on 5s though but im sure its going to blow up eventually. Anyone have a opinion on rated esc?? THis one says 60amp but I ran it and pulled 99amps, Im sure its not a good idea. |
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Sorry, I didn't think to fully measure the bearings before I put all 4 motors back together. I painted the shafts with clear dope so the bearings seat real nice. But it's a one shot deal on assembly. On first assembly, the inner race shaves off the dope just perfect. If I put them on a few times, they just shave it all off. So now I have all 4 assembled and don't really want to take apart again.
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IM pulling 60amps on 4s with this 3000kv motor
NOt sure how much thrust its making, sounds good though, ON 5s its really lighting things up but as I mention its almost 100amps. I just did a quick burst check to see the watts and amps, I dont think it would hold if i had it punched for a while.
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Last edited by 3rd-dem; Feb 29, 2012 at 08:22 PM.
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Thanks. |
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Neat add on to the chart guys! Me likes colors. Like the old threat colors.
Ok What does Optime stand for though? |
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The 2W20 is too high a Kv and too small a can to be efficient in this fan on 4 cells. Look for a much longer can motor with more mass and torque.
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Latest blog entry: Extreme RC AUSTRALIA
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anlucas, your 3300 is dead, correct? But you did run it on 4S and the numbers were great. What do you think about trying 3S ???? Do you think it would be better all around than the L2855-2300 on 4S ?? Considering both sound at all throttle levels and thrust. So if we scale your 4S results: Turnigy SK3 Fandrive - 3516-3300kv 4S 3000 40C 13.59Vm 87.5Ap 1215.0Wp 1.75Kg Thrust by .75 to do a "rough" conversion to 3S, it would be around (rough prediction, I know, but just for discussion). 3S 3000 40C 65.6Ap 911Wp 1.31Kg Thrust This is still way better than the L2855-2300 on 4S, at least for Amps and Watts, so the thrust should be more. The L2855's have poor balance issues. If the SK3 sounds very smooth like you say, I'm up for a try. But I need to buy 2, so committing $50 plus shipping, I kinda need some reassurance. Please keep in mind, I am not after MAX performance, just "airliner" performance. |
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The SK3 3300kv is not for a low-maintenance 4S setup. On 3S, there is no question that it will operate the CS10blade without burning up. Assuming that your 3S batteries can keep 11.1volts under load then you can get 36k rpm. The L2855-2300kv on 4S at 14.8volts gives 34k rpm. (1.2-1.3Kg of thrust) The above is in theory though and subject to the kv ratings being correct. |
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