Hello I have some Concerns
Only 14mins with 5300 mah 3s, is it ok? standard for violet motors, long 28 arms, nothing else...
Unsteady flight and rool/pitch oscilations specially with some wind (yaw is perfect)
Its almost ok, but cCompared to my gaui330x, my quad does not flight when stabilized, keeping a "parallel horizontal plane", it does unwanted slight rolls and pitchs...
Is this caused by wrong PIDS in my sotck long frame? standard apm pids are for 23cm or 28cm arms ?or both.. what pid parameter should i change to achieve rock solid steady flight
TYPE: "QUAD X"
FIRMWARE: last .39 (AC2 directly from mission planner)
STOCK: all stock violet motors LONG SHAFT :(,esc,frame,prop 10x45 and weight/gravity center
LIPO: 2650 3s x 2 (total 5300mah)
MAGNETOMETER: YES and enabled
PID: all default
SENSORS: closed soldered pads in the board(3)
FLIGHT MODES: 6 SWITCH 1=STABILIZE, 2=SIMPLE, 3=RTL , 4 STAB again, 5 AUTO, 6 RTL
RADIO: FUTABA 7CAP FM 72mhz
BOUGHT FROM: jdrones kit - assembled by myself
I am not sure of its weight, but on a the same airframe as you, same motors and props, complete with OSD Pro, gopro and fpv gear i get a calculated 8.5 minutes flight time on a 3s1p 2200 lipo, 7 minutes is what i normally fly to be safe. A single 2650 should would net me about 10 minutes calculated.
The extra weight of your second battery to me would not be worth the extra 4 or so minutes you get. I would probably consider a 4s1p pack before strapping on an additional battery.
On your PID's, try lowering your roll and pitch stabilize P term a bit. This will stop oscillations. If you get them in forward flight lower them a bit more till the oscillation is gone.
I get about 13 minutes with the same motors and camera, on a 3000mah. But im not doing any hottdogging.
How can I improve steady flights? change to shorter 23cm arms?
Wow, 15min is not very much.
I use the Roxxy 2827-34 with 10x4.7 APC and 2800mAh and get (the lipo is over a year old) 21:26 min (yesterday) in hoovering.
During fpv and fast flight I get around 16min and I land with 3.3V / cell.
Before the Roxxy I used to have the FC2822 (http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=...) from hobbyking.
With these I got with the same lipo (brand new) 2800mAh only about 6-8min. Then the lipo was hot and empty. Okay, maybe 1200kv were a bit to high.
A friend from our "quadcopter gang" used the same motors, but put a different copper wire on them. He said they now have 940kv. He flies 12min with 3000mAh. So there is some improvement.
All the other guys use AXI ... something like that: http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=...
My Roxxy look a lot like them, but green and have 750kv.