Author Topic: Mavic build - triafgg  (Read 12182 times)

Offline triafgg

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Re: Mavic build - triafgg
« Reply #15 on: March 04, 2017, 07:33:48 PM »
Didn't have time today to time the flights, only did that 3 min one. On a charged battery it went down to 95% so that calculates to 30+ mins but it won't be anywhere near that. Maybe 15-17 mins which I will be happy with.

I'm using Black Widow 2212 1000KV with the Multistar 3000mh 3S 10C battery


Offline okercho

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Re: Mavic build - triafgg
« Reply #16 on: March 06, 2017, 06:17:06 PM »
Hi triafgg,

What about the weight and power of those motors? how much throttle you need to take off?

Steve is using 1800kv motors, and you're using 1000kv... not sure if those will be powerful enough if you put any kind of gimbal on this frame?

To be honest, I'm not sure about the KVs, as per my understanding, less KV means more torque, which allows you to use bigger propellers, but also more consumption (not sure about this)...

Cheers

Offline triafgg

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Re: Mavic build - triafgg
« Reply #17 on: March 06, 2017, 10:44:26 PM »
I chose the 1000Kv because recommended prop size was 8-10" so thought using 9" props would be ideal. The 1800Kv has a recommendation for 5-6" props. I have yet to fly it in anger so will post results later this week.

It takes off at just over half throttle and hovers at about half.

Offline triafgg

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Re: Mavic build - triafgg
« Reply #18 on: March 06, 2017, 10:48:34 PM »
I chose the 1000Kv because recommended prop size was 8-10" so thought using 9" props would be ideal. The 1800Kv has a recommendation for 5-6" props. I have yet to fly it in anger so will post results later this week.

It takes off at just over half throttle and hovers at about half.

Offline triafgg

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Re: Mavic build - triafgg
« Reply #19 on: March 07, 2017, 05:59:52 PM »
Did some tests today.

Hovering 12 mins
Flying around 14 mins.

This is with the Multistar 3000Mah 10C

Not too happy with that so might have to look at other motor/prop combinations.

Maybe the 1800Kv with smaller props would be better.

Offline okercho

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Re: Mavic build - triafgg
« Reply #20 on: March 07, 2017, 06:05:19 PM »
Uhm, I was expecting a bit more honestly... I'm not sure if Steve did his tests already or not with the 1800KV motors, and AFAIK he is using the 8" props too...

Offline triafgg

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Re: Mavic build - triafgg
« Reply #21 on: March 07, 2017, 06:10:35 PM »
Just checked my battery, it still has 50% and just realised I haven't calibrated the battery so the warning LED came on too soon.

So going down to 20% would give me another 8 mins. That would give about 22 mins, I would be happy with that.

I will calibrate and do some more tests later in the week.

Offline Microfi

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Re: Mavic build - triafgg
« Reply #22 on: March 07, 2017, 06:43:42 PM »
That's already a completely different result!
I'd be happy if I could get a flight time of around 20min, honestly.

Offline okercho

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Re: Mavic build - triafgg
« Reply #23 on: March 07, 2017, 06:46:17 PM »
That's much better indeed!

Question, how did you attached the props to the motors? did you need to drill them? I think you're using the original/cloned foldable mavic props, right?

Can you post a picture?

Cheers!

Offline triafgg

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Re: Mavic build - triafgg
« Reply #24 on: March 07, 2017, 08:18:09 PM »
Yes I was using the cheap Ebay clones originally but they are more flexible than the originals and when I did a punch out they flexed too much and broke a rear leg, so now I am using APC MultiRotor MR 9x4.5. They are much quieter. I did have to drill out the folding ones but wouldn't use them again.

Offline okercho

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Re: Mavic build - triafgg
« Reply #25 on: March 08, 2017, 12:45:05 PM »
Uhm, interesting about the props... I bough 4 from Ebay at a really good price, let see what it comes.

Regarding the motors, did you buy it from HobbyKing? I'm looking the Black Widow 1000KV they have, and the CCW is discounted but the CW is not (?), so I was wondering if it's possible to just connect the ESC to the computer and re-program it in order to change the rotation... I did it with regular BLHeli ESCs, but not sure about this ones.

Cheers

Offline triafgg

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Re: Mavic build - triafgg
« Reply #26 on: March 08, 2017, 01:16:19 PM »
You can change the motor direction with blheli suite but that won't help because cw/ccw refers to the threads and if you reverse it the props will come loose.

I used it to flash to the latest firmware

One thing to note, if you use bw motors you will need to use the black earth to the FC or blheli suite won't recognise the ESCs

Offline okercho

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Re: Mavic build - triafgg
« Reply #27 on: March 08, 2017, 01:29:24 PM »
The thread should not be a problem as I will be using locked nuts (the discount for the CW is around 10Eur/motor, so... I will use the nuts xD).

I'm not sure about what is "Black Earth"... what you mean?

Cheers

Offline triafgg

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Re: Mavic build - triafgg
« Reply #28 on: March 08, 2017, 01:35:21 PM »
The shafts aren't that long so you need to check you have enough length for the nuts

There is a black and white lead coming from the ESC but you only need to connect the white one to the FC but you need both to flash with blheli suite

Offline okercho

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Re: Mavic build - triafgg
« Reply #29 on: March 08, 2017, 01:39:10 PM »
Ah ok, now I get it. I was thinking a bout a SW or something, not that "black earth" = "ground cable" XD

Thanks!