125 min (02:05:07) ultra-long flight (#2)
now on one battery pack :)
sorry, closed hardware setup
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125 min (02:05:07) ultra-long flight (#2)
now on one battery pack :)
sorry, closed hardware setup
You need to be a member of diydrones to add comments!
Comments
Guys, this is really rather simple. You can do the math yourself, or if we can agree on some parameters, I'll do it for you. All you need are total weight, prop diameter, and battery capacity - with those figures alone you can predict within +/- 20% what the endurance will be based on empirical physical laws. Can we get a consensus of those numbers?
Can you or someone else add the values on <eCalc> below, for a 114min flight or more? I did try to play with different values, but not able to get more that 50min.
Please post a capture screen attachment after that.
xcopterCalc - Multicopter Calculator
do it... 600kv and 14" are pretty common.. heck that is what I am flying on one of mine... but I sure don't get nearly that sort of performance.
Unfortunately because of the lack of more detailed tests of high motor, such as motor tiger is very difficult to find the optimal pair of engine-propeller. The site tests are limited to manufacturers of engines propeller 17 * 5.5, but reason tells me that using a larger propeller can significantly streamline even my rough calculations. Unfortunately there is no data on the use of these motors and propellers 20 more inches
John Maffetone
if take the motor MN4014-11kv330 with Prop DJI15x5 we take from one motor for 8A the thrust 1500 (with 5s battary)
Battary 6s11Ah weight is 1235g, if we make quadrocopter then we have ~200g from each motor (1500g-1235g-149g motor) and is 800g for frame, esc, wire, reciver, naza e.t.c.
with this thrust fo motor need 8A and time for fly is 11A/8A*60=82min.. with error ~60min, vis.asta can select more optimaly component, modify algoritms e.t.c. he spent a few years and more money. I picked up the parts for a few minutes to an hour of guaranteed flight. I think the video is true especially considering dumping batteries. If possible, I try the summer volunteered his test flights to see all by myself.
sorry thrust for motor is not 1170A, is 1170g :)
who want to check the following component for quadrocopter:
Battary: 4 * 3s11000 (620g or 2480g for 4x)
Motor+ESC: mt2814 -11 kv710 + ESC20A (150g or 600g for 4x)
Reciver: Anybody ~10g
Frame:~450g
Prop: APC15*4 (~15g)
Controller: Naza ~80g
4xBattary+4*(motor+ecs)+reciver+naza+frame+4xProp=~=3680g (weight)
Thrust for 1 motor mt2814 -11 kv710 with prop APC 15x4 for I=12.7A is 1170A
Thrust for 4 motor is ~4600g
Battary is 4x3s11000 is 44Ah
for this setup wi have copter weight 3680 g with thrust 4680g when I=12.7A
Time for hovering ~44Ah/(4*12.7)*60=~50min (is with wires and additional 1kg payload)
Сourse calculations are rounded. not taken into account in order to balance energy consumption, a little inflated these batteries and engines, the weight of wires and bolts. But even if we take the 50% error we have fly time is 25min with payload 1kg. I did not choose the most optimal motor, battery quantity, specification made in 5 minutes. Cost of this components ~2000$
@Carl: hmm? PX4FLOW gives optical/distance based 3D position over ground, plus ground speed/direction/turn tracking which makes it perfectly viable to navigate without GPS if you know your starting point and heading. You would have to program it, but the sensor is working and very precise at what it does (I have it, still just playing around with it though). Gives a totally different meaning to Position Hold VS the pathethic precision GPS offers.
@Brad: I think you are discounting the antigravitational effects of the diamond coated unobtanium nanofibres used ;)
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