LHR Dave Posted May 13, 2018 Share Posted May 13, 2018 My Dji F450 with Naza lite controller and Spektrum RX struggles to lift off after several months of non flying. It has been stored in a warm house for the lay off period. When I try to lift off it scuttles around on the floor and will lift off with some coaxing. Once in the air it seems to perform ok, but it seems to be under powered. I have tried several different Lipo sizes. So far I have wiped the settings from the DX7s TX and set everything up again. Have plugged the drone into my computer and performed a calibration and checked all switches etc perform how they should. yet after all this it still performs as described. I am now lost as to what to do , has anyone got any suggestions. Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted May 13, 2018 Share Posted May 13, 2018 It does sound like the throttle needs recalibrating to produce the full throw, for full power With the model off Check your servo monitor on the Tx that the arrow goes bottom to top Edited By Denis Watkins on 13/05/2018 19:51:52 Quote Link to comment Share on other sites More sharing options...
Biggles' Elder Brother - Moderator Posted May 13, 2018 Share Posted May 13, 2018 Dave have you tried going back to the NAZA software and just doing a complete "rebuild" of each step, as if you were setting it up from scratch? BEB Quote Link to comment Share on other sites More sharing options...
LHR Dave Posted May 13, 2018 Author Share Posted May 13, 2018 Yes BEB I went back into NAZA software after i wiped the TX and re loaded the settings. I am pretty sure i have checked the TX servo throw settings but will re visit this. I am now thinking of stripping the drone down and rebuilding to see if that has ant effect. Quote Link to comment Share on other sites More sharing options...
LHR Dave Posted May 13, 2018 Author Share Posted May 13, 2018 Settings on my DX7 which i only use for this drone (fly Futaba for my aircraft). Throttle travel starts at -96 and ends at 97 at full throttle. Which approx the same figures for all controls on there full travel. Not too hot on using this Tx but all seems ok I think. Quote Link to comment Share on other sites More sharing options...
Biggles' Elder Brother - Moderator Posted May 13, 2018 Share Posted May 13, 2018 Yes, the throttle throw sounds good and the controller should be happy. OK that's the obvious stuff,...how about some less likely, but possible? Loose props? I know the DJI's are "self tightening, but nothings perfect! All rotating in the correct dirrections? Right props on the right rotations? Connections from ESC's OK? Worth breaking and remaking - in case of any oxidisation etc.? Batteries fully "fit"? Just some ideas of things to try.... BEB Quote Link to comment Share on other sites More sharing options...
Former Member Posted May 13, 2018 Share Posted May 13, 2018 [This posting has been removed] Quote Link to comment Share on other sites More sharing options...
LHR Dave Posted May 13, 2018 Author Share Posted May 13, 2018 Will try all these things tomorrow morning. Would the compass recalibration be in the Naza Software? Quote Link to comment Share on other sites More sharing options...
LHR Dave Posted May 16, 2018 Author Share Posted May 16, 2018 Latest update..... I have checked all connections to esc's and flight controller (Naza M Lite) and all are fine and show no signs of corrosion. I have calibrated the Tx to the Naza software. I have checked all switches and controls on the Naza software. I have performed a calibration of the drones compass. Have checked that props are correct. Yet when i go to lift off the drone still fails to lift off immediately and scuttles across the floor. I am well and truly lost as what else it could be !!!!!!!!!!! Quote Link to comment Share on other sites More sharing options...
Biggles' Elder Brother - Moderator Posted May 16, 2018 Share Posted May 16, 2018 Well, it's certianly a poser this one! OK here's a long shot - you say it "scuttles along the floor? Like it has just hover power but not ascending, lift, power? Well, if I remember correctly, and its been a while since I used a NAZA-lite, it is one of those controlers that seeks to set hover power to exactly half throttle, so you always know the stick setting for a hover, it's just the middle position. Is there a clue there do we think? Could the Tx only be issuing throttle mid-point, ie zero, or something similar? Vague I know, but I'm running out of ideas! BEB Quote Link to comment Share on other sites More sharing options...
John Payne Posted May 17, 2018 Share Posted May 17, 2018 Hi. Just a thought, but a quick Google finds some people who had the same problem and the props were on the wrong motors and therefore not generating enough lift. Check again that the props are on the correct motors and turning the correct way. I know there are two of each direction but perhaps they are on the wrong motors. Sorry if you have already checked this when you say you have checked the props. John. Quote Link to comment Share on other sites More sharing options...
Denis Watkins Posted May 17, 2018 Share Posted May 17, 2018 Long shot Dave, but if the floor were not there, would the model go down? Try it outside from a raised surface, is the thrust down? Quote Link to comment Share on other sites More sharing options...
LHR Dave Posted May 17, 2018 Author Share Posted May 17, 2018 Props definitely on ok , When drone is powered up it struggles to get airborne, but once it is coaxed airborne it appears to fly normally. It's just getting it there that's the problem. Even with the throttle pushed straight to full this still occurs. Quote Link to comment Share on other sites More sharing options...
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