Hello everyone I have 5010 motor i have 18inch prop too and I wanted to make nearlly 15min flight time how to calculate copter weight with battery and battery mah
Mine has 6s 340kv motor
payload is 5kg is it possible to make ?
……….
By using eCalc.
Plz share your experience , i know there are so many ecals but I need practical knowledge
Thank you
There is no mentioning my motor brand name so I need guessing or need someone experience
Then use a T-motor 5008 340kv. It will be close enough.
I think you have all the info you need in the specs, but let me give you a walkthrough:
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You said you have 18inch props.l & and you need more than 18 min flight time.
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Usually we aim for at least 2x All up weight thrust
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From the table we get that
@ 50% throttle with 1855 you get 1728gr thrust
Meaning 4 x 1728 = 6912gr total
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So you aim for a 6912(or less) all up weight copter
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Subtract the essentials
-170 x4 for motors = 680gr
-25-50gr x4 for ESC. = 100-200gr
- 200gr for avionics
-cables, connectors, pdb
= -1400gr
- Calculate the desired battery
From the same table we read that you need 6.5Amps per motor @6s = 26Amps
a. So if you had a 26Ah 6S battery you can provide power for an hour
b. With a 13Ah battery for 30min,
c. But you need to consider only 75-85 of nominal capacity thus you could aim for a popular 16Ah 6S battery
d. Most 16Ah 6S batteries weight about 2000gr
- Final calcs
6912-1400-2000: You have 3400gr left for your airframe, payload etc and more than 20min flight time with a very very safe thrust ratio.
Happy flying,
That was life before ecalc, but these days we don’t really trust marketing tables, so give some headroom in your calcs, or try a thrust stand to make your one measurements.
Best,
Dimitris
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