Register Now

Apraxin · 12-23-2012, 06:26 AM

Hi Guys! I have a helicopter with autopilot DJI ACEONE. Unfortunately, on the
day it crashed. I will try to describe to you the essence of the
problem step by step,
... and had such wonderful weather. it is sunny day without wind and
temperature about -3 ... -7*C... (monitor on a building showed -3C,
receiver log showed minimum -7C.)
1. Switch-on power, waiting when DJI founds sattelits and Engine start
in Manual mode
2. Switch to GPS Attitude. Compass led indicates no one fails/errors.
3. Take off. Immediately after takeoff, the helicopter start to take
away the right (right bank).
4. I tried to align it manually. The helicopter began to slowly level
off, but after 2-3 seconds continued to divert to the right even more.
5. Control the helicopter was difficult. All my attempts to get him
back to the horizontal position was not possible. Controlled
helicopter began jerking delayed.
6. Control of the helicopter became impossible and it crashed near humans!

Immediately after the crash:
1. I checked the power supply system 6.0v steadily without
interruption. (it has diagnostics)
2. I checked the servo, they were working well (were disassembled and
checked)
3. I checked the log file receiver, no signal loss in flight. (Log has
all info about each packet sent and delivered)
4. I downloaded the log from ACEONE and send it to DJI Support
... from dji no responce more two weeks.

Have someone any estimates about this accident ?

Tahoe Ed · 12-23-2012, 08:04 PM

Did you allow the Ace One to acclimate to the weather? If not the IMU could be confused. In low temps, I always allow the copter to acclimate, i.e., set outside for 10-15 mins, then install warm lipos. I fly at 6500' in temps below 0.

AKPhill · 12-24-2012, 09:55 AM

Yep sounds like acclimation problem I set my helis outside for 10 minutes or so before flying including the battery never a problem
Same temps here 0 to 10f above

Apraxin · 12-24-2012, 04:58 PM

Tahoe Ed Yes. I am waiting for operator makes settings adjustment on camera about 10-15 min.

AKPhil What autopilot you had using? AceOne or AceOne Waypoint ? The AceOne temp. range +70...-5*С and AceOne Waypoint works at +70...-20*C !!!

PS A few days before, I have had a similar throuble. Helicopter began to behave very strange, but after 10-15 seconds it normalized. I landed it. After re-initializing all became
normal.

12-23-2012, 06:26 AM	#1 (permalink)
Apraxin Registered Users Join Date: Jan 2012	DJI ACE ONE problems (cold weather) Hi Guys! I have a helicopter with autopilot DJI ACEONE. Unfortunately, on the day it crashed. I will try to describe to you the essence of the problem step by step, ... and had such wonderful weather. it is sunny day without wind and temperature about -3 ... -7*C... (monitor on a building showed -3C, receiver log showed minimum -7C.) 1. Switch-on power, waiting when DJI founds sattelits and Engine start in Manual mode 2. Switch to GPS Attitude. Compass led indicates no one fails/errors. 3. Take off. Immediately after takeoff, the helicopter start to take away the right (right bank). 4. I tried to align it manually. The helicopter began to slowly level off, but after 2-3 seconds continued to divert to the right even more. 5. Control the helicopter was difficult. All my attempts to get him back to the horizontal position was not possible. Controlled helicopter began jerking delayed. 6. Control of the helicopter became impossible and it crashed near humans! Immediately after the crash: 1. I checked the power supply system 6.0v steadily without interruption. (it has diagnostics) 2. I checked the servo, they were working well (were disassembled and checked) 3. I checked the log file receiver, no signal loss in flight. (Log has all info about each packet sent and delivered) 4. I downloaded the log from ACEONE and send it to DJI Support ... from dji no responce more two weeks. Have someone any estimates about this accident ?

12-23-2012, 08:04 PM	#2 (permalink)
Tahoe Ed Registered Users My HF Map location Join Date: Nov 2009	Did you allow the Ace One to acclimate to the weather? If not the IMU could be confused. In low temps, I always allow the copter to acclimate, i.e., set outside for 10-15 mins, then install warm lipos. I fly at 6500' in temps below 0. __________________ AMA #844172 DJI S1000 Lightbridge Zen for 5D, S900 LB Zen for BMPCC, DJI Phantom 2 Vision +, P2Z2 with Data Link, P2Z3 with LB DJI Forum Support

12-24-2012, 09:55 AM	#3 (permalink)
AKPhill Registered Users My HF Map location Join Date: Feb 2009	Yep sounds like acclimation problem I set my helis outside for 10 minutes or so before flying including the battery never a problem Same temps here 0 to 10f above __________________ Raptor 50 se v2, raptor titan 50 Hirobo Shuttle ZX, trex esp 600 trex esp 500 fb trex esp 500 fbl

Thread Tools
Show Printable Version Email this Page
Display Modes
Linear Mode Switch to Hybrid Mode Switch to Threaded Mode

12-24-2012, 04:58 PM	#4 (permalink)
Apraxin Registered Users Thread Starter Join Date: Jan 2012	Tahoe Ed Yes. I am waiting for operator makes settings adjustment on camera about 10-15 min. AKPhil What autopilot you had using? AceOne or AceOne Waypoint ? The AceOne temp. range +70...-5С and AceOne Waypoint works at +70...-20C !!! PS A few days before, I have had a similar throuble. Helicopter began to behave very strange, but after 10-15 seconds it normalized. I landed it. After re-initializing all became normal.

Register Now

Log-in