first look on xcelorin 1700kv-motor

[florianz]

after I have tried & fried some motors in the past months, most of them cheap but useless (except the 36-88mm brick, but the magnet got loose again...), so I tried the xcelorin.



and build in


I chose the motor because of the availability in my lhs, the good price of Eur 99,- , it's a 4 Pole-Motor, which means better torque, quality seems ok and losi says "90 % efficiency". it also has mounting-holes for 4m-screws.

The buggy is a cheapo-thing called "ansmann Virus", biggest problem are the diffs, the diffcases are too soft. I finally found an alternative, I have now the diffs of the hyper 7, which fit perfectly. the buggy seems like a rip-off of a hyper 7. but anyways.

I used the new motor on 5s lipo a couple of times, the diff has 12/43 teeth, kyosho plastic spur gear 46 teeth or so, and crime-fighter truggy-tires. esc is a chinese-no-name.

like that the temperatures were around 40 to 50 degrees on the motor, and a bit hotter at the pinion. I use a little fan to be on the safe side. it's pretty cold here at the moment, tought. highest temp on the esc w/o fan was 50 deg., with fan 30 deg.

Yesterday I had the hottest temperatures, around 69 deg. c. on the motor, 50 at the gear, after a whole run; the fan didn't work. it was like permanent full throttle-breaks etc. high grip. same gearing (/13t), but a newly shimmed front diff which is not that smooth at the moment (that will change after some runs. Due to the torque I dont want a loose fit in the diff). this may be a reason for the higher temps, I dunno. weight of the buggy-truggy is 4,5 kilo total.

Most times I had the lowest timing possible on my esc, 1deg, also tried 8deg, which caused less cogging, and probably better temps. I need some more runs to find out. the "felt runtime" on a 4400mah 18,4v lipo was good.

Probably I try a 14t steel pinion, I am just a bit scary after I killed some chinese motors. with 13t accelaration is great, wheelies possible, topspeed guessed (low grass, winter, no snow) +45 kmH. I have read and also experienced that a higher gearing could cause even better accelaration (and higher amps too).

performance overall is good so far.

When I think of yesterday's "abuse" the high temperatures of 69 degrees w/o fan are ok, but have to be lower in the long run, definately. any suggestions are wellcome.

has anybody an idea who's the manufacturer of the Motor?
flo