30amp esc or 40amp esc?

[nickyb]

Hi,

I';m looking to purchase a tarot t650 quad. Most of the kits etc are listed with 30amp ESCs, are these sufficient for this quad?

Someone once told me its a good idea to go for 40amp as it gives you a bit more headroom?

Finally, looking at ESC, some come with the Simon K firmware, some don';t. Would having the Simon K firmware making it more
stable in flight?

thanks

Nick

[mrmurder1975]

ive always gone with the idea that its good practise to go with a bit of a larger esc than you need, just for peace of mind if nothing else. in all my builds (planes, helis, multi rotors) if the spec says get a 30a, i get a 40a, or a 20a i get a 30a etc.

after all its much better to have an esc that is over rated than under.

simon k speedies are a much better choice for multi rotor applications. if cost is an issue (but there';s really not much between them, price wise) then turnigy plush esc';s are good. but if you can get simon k ones, do it. they respond much quicker to your throttle changes and will give you a more stable multi. and they will allow you to tune your gains higher which will also make your craft more stable.

what fc are you planning on using? simon k ones work very well with the kk2. i cant vouch for how they work with any other fc, but i would imagine the results are just as good or better with more expensive fc';s. i exclusively use the kk2 (price is a real issue for me) and am more than happy with that combination.

[mrmurder1975]

deleted.  (quoted myself. doh!)

[nickyb]

ive always gone with the idea that its good practise to go with a bit of a larger esc than you need, just for peace of mind if nothing else. in all my builds (planes, helis, multi rotors) if the spec says get a 30a, i get a 40a, or a 20a i get a 30a etc.

after all its much better to have an esc that is over rated than under.

simon k speedies are a much better choice for multi rotor applications. if cost is an issue (but there';s really not much between them, price wise) then turnigy plush esc';s are good. but if you can get simon k ones, do it. they respond much quicker to your throttle changes and will give you a more stable multi. and they will allow you to tune your gains higher which will also make your craft more stable.

what fc are you planning on using? simon k ones work very well with the kk2. i cant vouch for how they work with any other fc, but i would imagine the results are just as good or better with more expensive fc';s. i exclusively use the kk2 (price is a real issue for me) and am more than happy with that combination.

thanks for the sound advice here.

[mrmurder1975]

no worries mate. good luck with your build.

[SimonS]

A 2kg quad using 4s Lipo';s will hover at about 30A total (7.5A per motor) and is unlikely to exceed 60A at full power so 30A ESC';s will give you a good margin.  If you use 3s the figures will be approx 45A and 90A.

SimonK flashed ESC';s are the prefered option for multirotors for improved responsiveness and performance.  You can buy them pre flashed or flash your own if you have the right equipment.  A few suggestions:

http://www.rctimer.com/product_779.html
http://www.ekmpowershop14.com/ekmps/shops/proflightuk/proflight-uk-30a-esc-simonk-multi-rotor-optimised-164-p.asp
http://www.hobbyking.com/hobbyking/store/__39708__Afro_ESC_30Amp_Multi_rotor_Motor_Speed_Controller_SimonK_Firmware_.html

The RCTimer and proflight UK ESC';s are the same. It just depends if you want to buy from the UK or China.  HK Afro is quite a bit larger so might be a problem if space is an issue.

[teslahed]

I would recommend the HK afros unless space is a premium just because they come preflashed with simonK firmware and have the latest hardware design. They aren';t going to be that much better than good rctimer or hobbyking ESCs flashed with simonK but you may as well get them if they are in stock.

Alternatively look into flashing your own;

http://www.multi-rotor.co.uk/index.php?topic=1079.0

These two are very good standards of basic ESC for flashing yourself;

http://www.hobbyking.com/hobbyking/store/__15205__hobby_king_30a_esc_3a_ubec.html?gclid=CJWQhfPk47kCFfMQtAodskoAww

http://www.hobbyking.com/hobbyking/store/__13429__HobbyKing_30A_BlueSeries_Brushless_Speed_Controller.html

But you can buy the afroESCs preflashed anyway so there doesn';t seem much point;

http://www.hobbyking.com/hobbyking/store/__39708__Afro_ESC_30Amp_Multi_rotor_Motor_Speed_Controller_SimonK_Firmware_.html