Welcome to PhantomPilots.com

Sign up for a weekly email of the latest drone news & information

P1 From Start - To Start!

Discussion in 'Phantom 1 Discussion' started by ScouseMouse, Mar 16, 2017.

  1. ScouseMouse

    Joined:
    Jan 13, 2017
    Messages:
    85
    Likes Received:
    12
    Location:
    Liverpool, United Kingdom
    Hi everyone,

    I thought I would share my experiences with you as although I am new to the Phantom I have had lots of experience with 250 size FPV quads and decided to dip my toe in the water with a second-hand P1 back in December.
    Within an hour I made sure the P1 armed and at least wanted to take off by setting it up indoors but not flying it - all was good! The weather here in the UK hasn't been good and with the short daylight hours and work commitments I knew I wouldn't be able to truly test it for a good few weeks (months actually!), so I invested in a used 3-axis gimbal, an upgraded potentiometer and knob for the transmitter along with self-tightening 9" props and taller landing legs.
    Physically fitting these wasn't an issue, getting the gimbal to work correctly was a real pain but it now works fine and the independently made control knob/pot is a dream, seemingly much better and harder wearing the the original (now unavailable) lever for the back of the transmitter. Currently I have an SJ4000 camera in the gimbal which seems to be pretty good for the money, the next step is to fit FPV to the P1 via the live video-out feature on the camera and a 25Mw Tx mounted nicely in the shell somewhere.
    Interestingly, when I connected the P1 to NAZAM the other night to check settings, it gave me an instant alert saying that my transmitter settings were out of range - panic! When I checked the throttle/aeleron/rudder commands, the rudder wasn't being recognized at all so I had to open-up the transmitter and check for faulty connections etc. Not sure exactly what was wrong but when I re-assembled it and checked again it worked fine, the only problem was the drone wouldn't arm..! An advanced IMU calibration sorted the issue but I will have to keep an eye on the rudder control in case it's a fault that comes back mid-flight.
    So - all this before the P1 has even truly been flown! From starting with a second-hand drone and buying the bits off EBay (total cost so far less than £230 including the P1) to being where I am now - about to start flying!
    Seems to me to be a great way to start with DJI products and I have gleaned so much info from this site I just wanted to let people know my progress so far and to say thanks to all who have posted. Happy flying!
     
  2. Pilot_FML

    Joined:
    Sep 20, 2013
    Messages:
    225
    Likes Received:
    28
    Location:
    Mentor. Ohio, USA
    Some very curious things going on here....

    If just taking things apart & then just reassembling them cures a problem, I'd be very wary about flying. At the very least, I'd try to duplicate the problem(s) a few more times to see if they re-occur.

    I also don't see why an IMU calibration has anything to do with curing an arming problem!

    Adding a Vtx also has the potential of interfering with the proper GPS operation and probably only should be done after you're sure there are no other problems.

    I wouldn't even mount the camera & gimbal until after several shake-down flights verify all's well.

    Bottom line: Take small steps and resist trying to do everything at once....just my humble opinion. ;)

    Best of luck...
     
  3. ScouseMouse

    Joined:
    Jan 13, 2017
    Messages:
    85
    Likes Received:
    12
    Location:
    Liverpool, United Kingdom
    Your comments are much appreciated and I had already decided the first flight is going to be REALLY close to me at low altitude so at least if the rudder problem recurs I will be able to land straight away.
    Good point about adding Vtx so I will follow your advice until I am confident all is well. Thanks
     
  4. ScouseMouse

    Joined:
    Jan 13, 2017
    Messages:
    85
    Likes Received:
    12
    Location:
    Liverpool, United Kingdom
    Pilot_FML - So far so good, no rudder problems experienced again but it is something I am aware of and will kepp a close eye on.
    With reference to your comment about a Vtx possibly interfering with GPS, is that a common issue? Lots of people have FPV added to P1's so I am curious and don't want to risk anything!
     
  5. Pilot_FML

    Joined:
    Sep 20, 2013
    Messages:
    225
    Likes Received:
    28
    Location:
    Mentor. Ohio, USA
    Not really a widespread or common problem but just something to be aware of.

    A poorly designed Vtx could emit signals that interfere with GPS signals. Not getting the proper number of satellites OR a good home lock before takeoff may indicate a problem in this area.

    A Vtx placed between the P1's GPS antenna and the path of GPS satellite signals could also physically block GPS signals. Confirm where your P1 GPS antenna is and mount the Vtx accordingly.

    Nothing guarantees that you'll have good GPS satellite locks your entire flight but by practicing in the ATTI mode, you can get around unexpected GPS problem and bring the P1 home without GPS assistance.
     
  6. ScouseMouse

    Joined:
    Jan 13, 2017
    Messages:
    85
    Likes Received:
    12
    Location:
    Liverpool, United Kingdom
    Thanks for the info! If I DO go ahead and fit a Vtx it'll only be a 25Mw which is our legal limit here in the UK and I think I'll mount it away from the upper part of the shell and GPS module. Your comments are extremely helpful and I will be doing a lot more close proximity flights to check existing GPS lock and also fly in ATTI to make doubly sure the rudder issue has been cured. Thanks
     
  7. Pilot_FML

    Joined:
    Sep 20, 2013
    Messages:
    225
    Likes Received:
    28
    Location:
    Mentor. Ohio, USA
    You're more than welcome.... enjoy the P1.... it's a reliable and "uncomplicated" bird to fly. Never regretted my choice to buy a couple of these.
     
Loading...