Battery

The Speed 900s are lighter

Yeah I think the fan motors are 1.2kg? Speed 900s are around 650g although since two of them are the popular option, then there's little weight difference.
And yeah Matt, to my knowledge they're dual direction.

Depending on total power, but currently, brushless motors and controllers are getting idioticaly cheap compared to brushed motors and relais.

Do you have a link to brushless motors that are good

http://www.hobbyking.com/hobbyking/stor ... 55%5F.html :proud:

That is a VERY nice spinner motor...... For a heavy....

Team RCC has one of these wandering, waitning for a robot to be build around it.

That is a monster thanks

Its the motor Buzzbar (Little Spinner 2) is using for his spinner at the moment, quite heavy though so would take a lot of clever design to be able to use it.

It's not so much the motor that bumps up the cost with brushless spinner setups, but the ESCs (and depending on brand, lipo packs too).
I got a nice Scorpion motor for £85 but a quick look into reliable controllers left me looking at a £200 pricetag. Suffice to say that'll have to wait a month or two.

Brushed electric spinner setups using Speed 900s or car fan motors are usually reliable and rugged. While brushless setups are becoming much cheaper in general and are possibly comparible in price to a motor/relay setup, to get a brushless setup in a featherweight spinner that is as reliable and rugged as the brushed option, you will have to pay much more. Go for the cheaper option and you might find that you have to replace bits on a more regular basis. Thankfully for the general UK roboteering community, Dave Moulds (360) has gone through a lot of models of motor and ESC, as well as a lot of money, to help determine what brands are better and what are not when it comes to featherweight brushless spinners.

ME?

lol... that motor posted above is utter rubbish for the size of it...you'd be much better of going with a smaller more efficient motor such as a scorpion HK4025, it will give more then enough power on 6s lipo than that bigun and weigh a lot less....

for example 360 uses a scorpion hk4025-890kv and generates 5000w (more then the advertised spec of the motor) on spin up.... i think LS4 uses the 12s version and that can produce even more power and its only like 5mm longer in size.

i originally used dual scorpion hk3026-1400kv motors in 360... and even one of those tiny motors could just about spin up the 5kg blade...

Glen in Aus is using a 3026 with a 3kg blade and its won pretty much every competition over there...

When using brushless always over rate the motor you need
Never over volt it
Over rate the esc you need and dont go for rubbish brands
If in doubt ask on here if your serious about building something.

price.... a decent motor will be around £120, a good esc will be about £150, and a suitable lipo will be around £80 depending on the setup.



from what ive seen... its a good idea to not go below a ratio relevent to the weight of your disc on a decent sized motor as a rule of thumb;

2kg disc... 2:1 ratio or more
3kg disc... 3:1 ratio or more
etc

examples of brushless discs;
http://www.youtube.com/watch?v=9C-FZlWJ4Oc