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[splasher 1]

Hi all,

I have just come across a tornado 50amp esc and have invested in a Perkasa which the manufacturers say should be powered by two 540s. Would it be too much for these motors or about right ?  advice please.

I also have a Mabuchi 540SH, question what does SH stand for?    It powered a model tank which has been binned and I've saved a gearbox which has clutches for turning left and right.
Could these be used for anything?  

Regards Splasher.

[Mad_Mike]

50 amp esc should be able to power to 540's as long as the correct props are used. SH means rare earth magnets and plastic endbell. Tank gear box is very useful to someone who needs one. Even if you dont use it some one on ebay would fork out at least a tenner for it.

[malcolmfrary]

http://www.mabuchi-motor.co.jp/cgi-bin/catalog/e_catalog.cgi?CAT_ID=rs_540sh
from a quick google indicates a 65watt motor pulling about 13A, depending on the actual model (2 shown), with a fairly an utterly horrendous stall current.
With fairly small 2 blade props to allow enough revs, and a 30A (ish) fuse between the battery and ESC, you should get the performance that the motors are capable of without cooking the ESC.  A better option is one ESC per motor, and distrusting over-optimistic ESC ratings is a sensible trait, although buying over the counter in the UK should be better than doing the same transaction at 8000 mile range.  If the ESC has both a forward and reverse current rating, believe the reverse rating - if it isn't man enough for the two motors in parallel, consider one per motor.
Doing a Perkasa on the cheap is a recipe for disappointment - they look great when showing off their potential, but a big, heavy, fast boat needs solid power, and that is never cheap and rarely easy.
An ESC can never be too much for any motor - the other way round, really.

[splasher 1]

Thank you mike for you're advice ,i do have my doubts about the 50amp forward and 20 amp reverse esc. The manufacturers recommend 2x  500 size motors and a 40 amp Mtronics viper sc + 7.2 v batteries and 30mm 3bladed props. Or using the same props ,E.S.C, but using 8.4 or 9.6 v batteries and upping to 600 size motors.
                                                                                                                                                               Regards Splasher 1         

[DickyD]

The Tornado is an excellent ESC [I have four] and is sold over the counter at a very reasonable price,

One could probably do the job but two would be better

[john44]

Hi Splasher, also bear in mind the Tamiya type connectors used on ESC are good upto about 20 amps.
I like Dicky have 4 of the Tornado ESC but on my models I use 1 per motor, so I have better control over steering.

john

[splasher 1]

Thank you DD ,Thank you John, for you're help i will be going for a pair of Tornadoes .Regards Splasher.