This design's goal is to achieve 1 hour fly time, and after all I've reached 70min+ flytime with this build.
It is build from scratch with 3mm carbon tubes, that make the frame under 18g and rigid enough to freestyle. The second important part is the battery. I made a 5000mah 2s battery with 2 cellphone battery cell to get highest power density, because cellphone batteries have much higher discharging voltage and about 20% lighter than 21700 cells.
At last I flied this quad manually for 70 min because I don't want to add more weight install GPS.
Photos
Part List
Flight Controller |
BetaFPV Toothpick F405 1S 12A AIO Brushless Flight Controller V3 ELRS 2.4G SPI - Choose MCU Type
(8 builds)
Pyrodrone.com
|
$49.99 |
Motors |
4 x Original Arm Motor for DJI Mini 3
Djioemparts.com
|
$67.96 |
Propellers |
DJI Mini 3 Propellers
Store.dji.com
|
See Site |
FPV Camera |
HappyModel RunCam Nano 3 800TVL CMOS FPV Camera w/ Holes & Plug
(11 builds)
Racedayquads.com
|
$19.99 |
With a barometer, angle mode and altitude hold, the dynamic load on the battery would be less. But maybe your flight was exactly like that?
WoW, awesome rig. I like the tubular designs a lot and I'm working on some variations of the EyeFly collection at the moment. I was wondering if you had the 3D print files somewhere? I'd love to tinker with this concept.
I miss tubular frame designs. I used to think they had some potential especially when 3D printing was getting more common. Looks great my guy!
So awesome to see more tubular designs! Great information about the pre-stressed tubes, i was not aware of that. I also do design tube-based frames for different purposes (eyeflydesigns.com). Are you on Discord by any chance? Would love to chat and share experiences.
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in 1 hour challenge hovering current is under 4 amp which is less than 1C, for high current situation, I use RC lipos
yes what cells were you using for hovering ?
just some random cellphone batteries which can be charged to 4.45V with higher discharging voltage to get more efficiency.