Flight times > 10m?
Dear group,
I'm trying to list the components of a custom build hexacopter that would aim at:
- transporting a GoPro HERO 3 camera (for both video and FPV)
- being very stable (no jello effect)
- have flight times of 10 or more minutes.
Using ecalc [1] I've tried multiple combinations of batteries/motors but I cannot seem to get anywhere near a flight time of 10 minutes. Examples follow.
HEXACOPTER
1. Turnigy D2836-11 (750) with 2x LiPo 5000mAh 3S and props 12x4.5, give me (with a 733g weight without drive):
- 8.19 flight time
- 19.15 flight time hover
- 59% throttle
- efficiencies of around 75%
2. iPower 2217Q (880) with 2x LiPo 5000mAh 3S and props 11x4.5, give me (with a 733g weight without drive):
- 6.8 flight time
- 18.49 flight time hover
- 53% throttle
- efficiencies of around 81%
QUADCOPTER
1. Turnigy D2836-11 (750) with 1x LiPo 5000mAh 3S and props 12x4.5, give me (with a 733g weight without drive):
- 6.25 flight time
- 13.27 flight time hover
- 64% throttle
- efficiencies of around 78%
2. iPower 2217Q (880) with 2x LiPo 5000mAh 3S and props 12x4.5, give me (with a 733g weight without drive):
- 8.05 flight time
- 19.69 flight time hover
- 57% throttle
- efficiencies of around 82%
Any recommendations? Aren't throttle around 60% way too much?
Kinda lost here. Thank you,
r.
Replies to This Discussion
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Permalink Reply by marc.kulhavy on -
Roberto,
get rid of 3s setups and look at 4s setups. I use 2x 5000 mAh 4s 20c packs, the turn 12x4.5 props on TM 3506-25 motors, driven by 20amp esc's with multiwii esc firmware.
Flight time with fpv aetup plus compact camera on a gimbal: 30 minutes
Regards
Marc -
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Permalink Reply by Roberto on -
Thank you Marc,
I've just inserted the data you've given me in ecalc and this is what I'm getting:
According to this I get 7.06 flight time, 24.98 Hovering flight times.
Am I doing something wrong?
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Permalink Reply by marc.kulhavy on
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Flight time in ecalc means at full power!!!
We normally don't fly at full throttle all the time...
Most of the time, I am hovering or flying around but with only a little more throttle than at hover, which is sufficient to be quite agile. -
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Permalink Reply by Roberto on
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thank you :)
do you know what it means that there's an "over limit" bar there at 14.2A?
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Permalink Reply by marc.kulhavy on
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This means over 14.2 A, the motors would pull more power than allowed in their specification.
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Permalink Reply by marc.kulhavy on
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3DR quad frame and a cheap, but well modified 2 axis camera gimbal from flyduino.net
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