This must be the best sell pitch ever or just their fantasy.
But still, if somebody can come up with a formula ( battery size , prop size,
motor ) to get at less 50% of that it would be great .
This are the specs for the MD4-1000 from the MicroDrones
Empty weight 2650g
Max payload weight 1200g
Take-off weight ~5500g
Size 102cm rotoraxis-rotoraxis
Flight duration up to 60 min
Operating distance up to 2000m
Battery cell LiPo 9000, 18000 or 27000 mAh
Wind tolerance 12 m/s
Replies
That don't impress me much.
If you don't carry a 500g gimbal and 1kg camera, that's 1.5 kg of extra battery that can be carried that will extend flight times.
@jani, the iBM4006Q looks very promising. I have been working with larger diameter motors for the last year on my builds. They are simply more efficient and produce less noise/vibration. They are much more versatile than motors that have smaller diameter, but longer stators. I have had no issue with over heating ESCs' or motors. I am turning 14"APC slow fly props on my MT3506 motors on 3 cells. Wind is an issue though with this setup, but it can be easily alleviated by switching to 12" APC slow fly props and 4 cell pack (only small adjustment in PIDs'). If you start stocking the iFlight motors I will surely buy some to give them a try. The thrust to weight ratio for these motors are hard to beat given their current draw.
Jani, I'm curious if those motors might be useful in a helicopter application? How many Volts and watts are they capable of? It might allow direct drive on a 450 size heli, or less gear reduction on a larger heli.
It would be interesting to maybe build a 450 heli with this on the main shaft with no gear reduction, and then use a small motor on the tail, direct.
Probably doesn't make any sense, but it's just a neat idea.
We have been working almost 6 months in jDrones with these big disk motors. There has been done a lot of testings with different materials and kv values and we are happy to inform that our optimized motors will be available in 2-3 weeks.
Result have been great and we have tested them with 10, 12, 15" propellers for far. 13-15" will be best for these type motors.
Just some results:
15" CF propeller, 560gr thrust and only 3.7Amp. So with 22Amp you can hover 3.4 Kgs roughly on Hexa. On Quad it would be 2.2Kg and 15Amps.
Hello Brian,
My motors are 24 poles, nothing to do with RCTimer (12 poles) or other low quality motors
W4822
nobody knows that MD used lithium-sulfur batteries that gives 3 times flight time of Lipos....but very low number of cycles !!!
Cheers
Maximus
RC tiger motor MT series, Hobbyking NX series motors for multirotors. Been using the NX-4005 650kV and the MT3506 650kV for my builds with really good results. High stator and pole count. These motors are really quite. You may also want to check out the 5010-14 360kV outrunner from rctimer.com. Motors such as this will provide more torque to turn a larger high static thrust prop. I am drawing literally half the amount of current with these motors than I was with motors that had fewer stators and magnets. Good luck:)
That video is a bit deceiving, guys are flying inside hall where they do not have any wind to messing up hexas, no payload, no landing gears etc. Ok only payload is battery. If they would do this somewhere outside, i'd say take out 10 minutes at least from flight times with same setup.. Ok even if its 30 mins, it is still rather good. Anyways MK is rather good, so we have nice goal to catch in ArduCopter group
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