Help me choose some new quadcopter motors.

This is the quad.

http://diydrones.com/profiles/blogs/mk-ii-h-frame-quad-now-flying

It is 2.2kg, using 4s 5Ah battery

I have been using these motors for some time now.

http://www.fast-lad.co.uk/store/products_multicopter_motor_4008-530kv_w/400mm_cable_95021003-p-21410.html

They are OK but the shafts, being 3.1mm are easily bent. I have replaced the shafts many times but after every minor ‘mishap’ it is difficult to decide if they are bent or not, especially when the label is on wonky. Also the small bearings take a hammering and are now getting rough. One motor is defiantly wobbly even with new shafts so I guess the case is bent.

I did order some himodel ones but that were totally useless and have just discovered were end of stock – discontinued.

http://diydrones.com/forum/topics/new-motors-himodel-c3410-unfortunately-useless?xg_source=activity

 

The current motors are 530kv, so big slow props, 14x4.7. It hovers at 15A and am getting about 15 min flights with reserve.

I want to keep the low Kv (due prop efficiency) but that limits the choice. Will stretch to 650kv max. Also I will only consider 4mm shafts.

This is probably a perfect choice but is overpriced bling.

http://www.rctigermotor.com/show.php?contentid=149

 

I have a Pulso motor on an aircraft.

http://pulsosystem.com/motor/

Very good well built motors but nothing that fits the bill.

 

Endless googleing has not uncovered the perfect motor.

 

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