Long running times on brussless motors

[Guest]

Hi everyone i have been playing around with brushless motors this year.I have had some good times with them and some bad.Now I feel I am going forwards very fast.I am getting bags of power and long running times.I have fitted them in small and large boats.I have fitted them in jet drive and prop boats.I have a Cygnus GM33 fishing boat 1:16 scale (24.5" long x 10.25" beam),and on a 6volt 7ahp gel cell battery runs for 4hours.It has a Tornado Thumper 3536 Brushless motor - 400 watt 1000 kv outrunner .The motor runs cold all the time so no power used to heat the lake.I have a 1:16 jet drive lifeboat (33" long x 9" beam).This has 2x 300watt 1700kv outrunner brushless motors.It has 2x 2500 ma 11.1 volt lipo battery's,and runs for 3 hours.The motors also run cold in this boat.I have a 1:10 scale jet drive lifeboat (54" long x14" beam and coming in at 15kg).This has 2x Tornado Thumper 4250 Brushless motor - 720 watt 600kv outrunner.This boat runs for 1.5 hours on a 12 volt 12ahp gel cell battery.I have also tried the Tornado Thumper 4250 Brushless motor - 720 watt in my Speedline 1:12 Severn lifeboat.It went well ,at a bit over scale speed on 75 mm props,but they got a little warm.So i have two Tornado Thumper 5055 Brushless motors - 1280 watt 580kv outrunner on there way for it.The Tornado Thumper 4250 Brushless motor - 720 watt 600kv are going in a new 1:12 scale tyne class lifeboat.On the low rpm outrunner brushless motors it looks like you need 100watts of power per kg they work very well.I hope this is of some help to everyone.I will keep you posted on how the severn and tyne get on.

ALAN

[Guest]

Interesting post mate I thought about Brusless some time ago but the cost is still to high not the motors but the controllers, new batteries and the cost of yet another battery charger but please keep the information coming

[Guest]

Where do you reccomend to get these thumper motors and the esc from cheers

Dave

[Guest]

Thanks for some useful information about brushless motors. I'm getting back into the hobby after many years and trying to go from gels and nicads with brushed motors into the new stuff is somewhat daunting. Just ordered a DeWalt 24V hammerdrill motor for about $70 USD. It is rated by the robot boys as 2HP around 21k rpm free running. Efficiency at 80% or better peak. Planned usage is a 1/6 scale Baby Bootlegger.

BigDutch

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