A Holybro 650 frame kit is nice, if you can get away with using 14inch or 15inch props. I’m putting one together now with parts we already had but it’s not ready for flight yet.
mad components
motor set 5005 IPE brushless motor 350kv
15/5.5 poly props
xrotor pro 40 am esc’s
cheaper that tmotor.
will let you know how they work…
I threw some rough values into ecalc and a copter of that weight will struggle a bit - we’re looking for a thrust:weight ratio of 2 or there’ll be some difficulty.
I think you need to step up to the MAD 5010-370kv with 16x5.5 APC MR props.
This will give you reasonable headroom for wind, manoeuvring and an easier life on the electrics.
You wont need a 100C battery, that’s unrealistic. You’ll get away with something around 20C 10Ahr
10 amp hours is 10000 milliamp hours. As for as the temp rating, thats what I found with that battery. If I missed something on my learning curve, I dont mind you chiming in.
This was listed with the motor data. It shows the motors are good for about 6 kg with 4 of them on the hover and 11.6kgf. as far as the normal rule of 2x the thrust on the weight, I beleive they accouted for it noting is was for ann expection drone and surveying since the competition racings drones I beleive are arounf 5x the force? Anyways here is the sheet. I was wanting to shop before, and was looking for a good way to find weights carried per motor with a suggested prop on the generics out there.
I see what I may have done wrong. I guess I have to put drive included and add a kit each time. Thought the best way was to let the program add it by not including them. I had bought some time on it before the suggestion and tried it. Will go back. The temp of the battery. Clarify for me, about it being unrealistic.
The temperature rating of the battery shouldnt be an issue, those big batteries spread the heat out more than smaller batteries, and you’ll still only have 20 minutes or less flight time for heat to build up. For there to be a heat problem (electrical load) you will notice it first in the ESCs and motors.
The “C” rating is a multiplier for the battery Amp hours to give the expected maximum current.
So a 10Ahr 20C battery could be expected to do 200 Amps peak.
Smaller batteries, like a 2200mAhr tend to have higher C rating because they can still do a crazy current, like 200 Amps, which would be 90C in this case.
Often you see two C ratings like this: 10C/20C
which means 10C continuous, 20C peak.
For a 10Ahr 100C battery (1000amps !! ) you would need a flying car to carry that around in, not a small multirotor For a 6S 10Ahr battery to be 100C it would need 4 extra cells in parallel with each of your first six series cells, making it a 6S5P battery, and it would be 5 times the weight
S and P mean Serial and Parallel.
ecalc is not exactly perfect, but it’s usually quite close given the correct data. If it thinks your 5005 350kv motors would struggle with the weight you are suggesting, then I would tend to believe it. You might get such a copter to work, and it may even be able to fly around for a while, but when the first gust of wind comes along we’ll be doing a crash investigation.
I’ve found ecalc to be a little on the conservative side, so struggling with the 5005 motors might be OK for some people, and you may see better performance than ecalc predicts - but for the price difference between the 5005’s and the 5010’s do you want to risk your payload, props and frame, when the 5010’s wouldnt be struggling.
Don’t go cheap on the props either. get genuine APC if you stay with plastic, or go to good quality CF if the payload is staying attached full time.
Are you using a cube flight controller with the Holybro x650 build? I’m considering something similar and curious if you’ve bumped into any integration challenges; I haven’t found much info online about anyone with a similar build considering Holybro makes their own controller.
You can use any good quality flight controller with such a frame, you wouldnt want to use a cheap FC and risk it having an issue in flight when the frame (and payload) could be quite expensive, not to mention the scope for other damage.
I’ve got a different frame with a Cube Orange, it’s a Quad X8 format - this is our “beater” for testing new firmware versions and whatever features we might need.
The HolyBro X650 frame has a CUAV X7 - the power connectors are different but everything else is the basically same, and the flight controllers are treated the same in nearly all respects. The X7 is used because that’s what we had available and I needed to test one out for someone else’s build. This will be more of a camera drone.
The build has been slightly delayed so it hasnt flown yet but I dont anticipate any issues since the frame seems good quality and is nice and stiff.
For a 6S 10Ahr battery to be 100C it would need 4 extra cells in parallel with each of your first six series cells, making it a 6S5P battery, and it would be 5 times the weight 