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post your setup and flight times

#1
I was just outside running the timer on my remote to get the flight times of the batteries that I have.. I had the idea if we post setups and flight time that may make it easier for others to better pick components to suit their needs.

My setup
Frame:Wooden bat bone tri copter
Motors: turnigy D2822/14 1450kv
ESC: HK blue series 20amp programmable
Props: slow fly 8.45
Flight controller: HK multi rotor control board V3.0
Accessories: 45 L.E.D'S. ( 15on each boom for orientation and night flying)

Batteries tested:
Turnigy nano tech 2200mah 3s 25-50c discharge rate... flight time 9:30 before esc cut off.. 8 minutes is a safe flight time to return and land..

Eflite 1500mah 3s 30amp max discharge rate flight time 6:20... safe flight 5 minutes, gives you time to return and land.

I hope to have a 3000mah nano tech soon.. so I'll up date when I get that battery.. I (ESTIMATE) 10-11 minutes of safe flight time

 

Cyberdactyl

Misfit Multirotor Monkey
#3
This is all very subjective.

I think the standard should be to start with a fresh ~4.2v per cell battery and gently (over about a 3-4 second period) raise the MR out of ground effect. . .and for 99.9% of multi-rotors that can be 3 meters. . . .and hover till a voltage per cell. . .say 3.4V, is reached on the last cell.
 

xuzme720

Dedicated foam bender
Mentor
#4
This is all very subjective.

I think the standard should be to start with a fresh ~4.2v per cell battery and gently (over about a 3-4 second period) raise the MR out of ground effect. . .and for 99.9% of multi-rotors that can be 3 meters. . . .and hover till a voltage per cell. . .say 3.4V, is reached on the last cell.
This is a great way to be sure everyone is comparing apples to apples...good call, Cyber!
 

vk2dxn

Senior Member
#5
Not every one runs telemetry so it will be hard to judge exact voltage cut off. However I do see a valid point to having a voltage range for comparing set ups. I can not retest my setup because I pulled the pin on the yaw mech in favor of making a Vtail. When I finish it I will post the findings if anyone is interested (4.2-3.4v) flight time
 

Cyberdactyl

Misfit Multirotor Monkey
#7
Not every one runs telemetry so it will be hard to judge exact voltage cut off. However I do see a valid point to having a voltage range for comparing set ups. I can not retest my setup because I pulled the pin on the yaw mech in favor of making a Vtail. When I finish it I will post the findings if anyone is interested (4.2-3.4v) flight time
If you're relying on a ground based airtime timer and don't have an alarm for low voltage, whether it be a $3 device or a beeper off the FC, you're asking major problems. Unless of course, your timer's time is set exceedingly low.

This one works wonderfully. You can set the lowV in increments of a tenth of a volt. It goes off for about 5 seconds when the first cell hits the lowV setting then shuts off, then goes off continuously when all the cells hit the lowV setting. It also shows a rolling display of each cell and a total. All for $2!
Can't beat the price, and free shipping. All MR's should have one if , if even set very low for a back up notification if you already have another method.
 
#8
all make valid points. I have the beep style voltage alarm. When it beeps bring it down or it's coming down as I hadn't set nimah on the esc..

I agree it's subjective.. my times were at hover and flying and turning about 30 feet either direction.. no hard throttle.. the problem I see is not many people just go into a hover in real world scenario.. but light throttle control flight times that I posted seem a decent median...

Of course none of these times are hard set.. just a reference, that's from a fully charged, balanced, 4.2v per cell until the low voltage alarm comes on.. when I put the batteries back on the charger the cell are 3.68-3.70v on average.
 
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#11
my tri - turnigy 2836 1100Kv - 9 inch props . wooden booms F-20A esc. 2200 3s - 840 g plus battery . Flight time around 8 mins
Tried putting info into www.ecalc.ch to see differences - with different props/esc/Lipo 's and motors.
I did have 40A escs - changing to 20A didn't really make much difference- as predicted! Reducing weight would probably be most effective but not really possible . Next for me is to try slightly larger properllers. I have frsky telemetry which is great - plenty warning - although a cheap and cheerful battery alarm works almost as well.
 
#14
Turnigy H.A.L. 585mm Frame in X-Quad Layout
NTM Prop Drive 28-30S 800KV 300W Motors
Turnigy Plush 18A ESCs
RCTimer Carbon Reinforced 10x4.5" Propellers
Zippy Compact 4000mAh 4S 25C LiPo

~1,800 grams of All Up Weight, hovers just above 50% throttle, runs for ~16 minutes before alarm sounds at 3.3v with mild maneuvering and hovering.



I/H 1/2" Dowel Frame with Carbon Fiber Brackets - All Up Weight is 850 grams.
NTM Prop Drive 28-30S 800KV 300W Motors
Turnigy Plush 18A ESCs
RCTimer Carbon Reinforced 10x4.5" Propellers
Turnigy Nano 1800 3S Battery

Runs for 10 to 11 minutes per charge.