Run time

[NitrousDisaster]

Hey guys, so another question for yous...

I'm running a 690mm CF frame
Multistar 490 kv motors
Multistar 45a sbec ESC's
Naza M v2
Max Amps 6000mah 6s
10" CF blades

so i'm having trouble with my run times now, only getting about 8mins, would like to see about 12-15min run times any suggestions

 

[kloner]

you should have way bigger props..... 12" if they fit at the smallest

 

[RichardDoty]

Get another pack of batteries with bigger capacity. You know, some 2S lipo battery's capacity can up to 5400mah, if you use a pack of battery like this, the dead-weight will lighter than you use a 6s battery.

 

[Jpdeuce]

you should have way bigger props..... 12" if they fit at the smallest

+1

Definitely too small of props. You can fit 12" at least. Check out wolph's thread for a quick guide to help with prop size.

Don't drop the voltage with a smaller battery.

 

[NitrousDisaster]

+1

Definitely too small of props. You can fit 12" at least. Check out wolph's thread for a quick guide to help with prop size.

Don't drop the voltage with a smaller battery.

i did download wolph's prop calc, and from what i can tell it says i should be running atleast 15" props to be close to linear, so i did that and i am now trying to adjust my gains accordingly but not having alot of luck at the moment, default settings give me one hell of an unstable wobble, so i up'd the attitude gains by 10% with no change so now im gonna try putting them back to default and changing my basic gains up !0% and see where i stand

 

[RTRyder]

i did download wolph's prop calc, and from what i can tell it says i should be running atleast 15" props to be close to linear, so i did that and i am now trying to adjust my gains accordingly but not having alot of luck at the moment, default settings give me one hell of an unstable wobble, so i up'd the attitude gains by 10% with no change so now im gonna try putting them back to default and changing my basic gains up !0% and see where i stand

10% isn't even close to being enough of an increase in my experience. Best thing to do is put both basic pitch and roll gains on a slider or knob on the TX so you can adjust while in flight, do the same for ATTI gains if your radio has a second knob or slider that can be assigned to the AUX2 channel. Whenever I make major changes to frame or motor/prop configuration with DJI flight controllers I always do the first flight or two with both sets of gains TX adjustable, it gets you to where they need to be with just a couple flights at most and no need to keep landing and connecting to the Assistant to make changes.

FWIW, on my TBS Discovery with extended arms, 390kv motors, and 12 inch props, I had to increase the basic gains from roughly 110 to up around 170 just to get off the ground with any degree of stability, also had to dial down the ATTI gains quite a bit as well, still tinkering with the dials on the radio to find the optimum setup mostly because the crappy weather pattern we're stuck in here is severely limiting flight time.

Ken

 

[NitrousDisaster]

10% isn't even close to being enough of an increase in my experience. Best thing to do is put both basic pitch and roll gains on a slider or knob on the TX so you can adjust while in flight, do the same for ATTI gains if your radio has a second knob or slider that can be assigned to the AUX2 channel. Whenever I make major changes to frame or motor/prop configuration with DJI flight controllers I always do the first flight or two with both sets of gains TX adjustable, it gets you to where they need to be with just a couple flights at most and no need to keep landing and connecting to the Assistant to make changes.

FWIW, on my TBS Discovery with extended arms, 390kv motors, and 12 inch props, I had to increase the basic gains from roughly 110 to up around 170 just to get off the ground with any degree of stability, also had to dial down the ATTI gains quite a bit as well, still tinkering with the dials on the radio to find the optimum setup mostly because the crappy weather pattern we're stuck in here is severely limiting flight time.

Ken

hey ken,

so i just took it for another test flight and believe it or not my basic gains are set now at 85/85/100/100 and att at 120/120, i have no wobble anymore however it yaws in a counterclockwise direction slowly, and i cant get it to hover it either gains or loses altitude give or take ten feet or so if i don't correct it, what do you think? is my yaw gain too high or low? and maybe my vertical needs adjusting?

 

[Jpdeuce]

i did download wolph's prop calc, and from what i can tell it says i should be running atleast 15" props to be close to linear

I'm surprised it said 15" props would fit on the 690 frame. Also, I think the details for that motor suggested a max of 14x5 props. Got any of those you could try?

 

[NitrousDisaster]

I'm surprised it said 15" props would fit on the 690 frame. Also, I think the details for that motor suggested a max of 14x5 props. Got any of those you could try?

hey JP thanks for the heads up i never even thought to make sure it could handle 15" props, i do have 14's i could try but what would be the end result if i left the 15's on?