Hi Iris+ people,
So my first flight went well, but I called it quits as I thought the wind was too strong. It was gusting at around 15mph. Just seen a YouTube vid where some guys fly in +- 30mph winds!
I figured the wind was too strong, as the Iris could not hold a steady position in Loiter, although it did seem to try. However, there was no gimbal or camera attached. The Iris also flipped during a take off, but maybe I just need to be quicker taking off as the wind seemed to upend it and the feet would catch on the grass.
One of the props was slightly bent during the flip. Very slight bend, but I can feel it. Should this prop be scrapped? I'm guessing yes, but it never hurts to check!
Any thoughts, comments about flying in the wind? Things get pretty gusty up in South Dakota.
Lastly, the long wait for batteries to charge! I've been looking at some options for a better charger. Would anyone care to recommend something? Preferably less than $100. Would it be possible to charge more than one battery at a time, for this price?
scrap the bent prop pronto! :)
choose a less windy day for your initial flights to avoid damage to the IRIS.. its NOT very powerful especially WITH the gimbal and camera and stock props..
especially watch out for the high hover throttle when fully loaded on stock IRIS+ 9" props(especially in wind).. somewhere between 68-73% according to xcoptercalc
The IRIS/IRIS+ comes calibrated and RTF.. nothing needed to be done...
enjoy your new IRIS.. they are loads of fun!!
I don't consider myself and expert, but here are some quick thoughts:
I actually did straighten the bent prop out, and it flew just fine! Still, it is now relegated to emergency duty.
Thank-you for the charger recommendation! I would rather have to buy batteries more frequently than have to wait as long as the stock charger takes.
Now if I could just get the telemetry to go a bit further.
I wound up breaking all rubberducks I had to see what was inside.. only in the case of genuine 3DR rubber ducks did they contain attenae elements appropriate to the frequency stated.
All of the antennas for 433 and 915 from other suppliers I had were really 2.4 ghz rubber ducks instead.
(I was only getting about 1/2 k away before telemetry went down)
I wound up using coil loaded 915 whips from range video aboard and a HG908P(8db patch) on the GCS end and get solid telemetry to the distance I have been flying(about 1-2 kilometers from launch.)
I suspect the system will operate at far greater ranges given one end is airborne but dont have access to a large test area immediately and in craft rebuild since fridays crash.
hope the above helps
What caused your crash?
See issues 1951 and 1952
I would NOT follow recommendations of a backup RCTX powered on and in the stick switch settings it needs to be for arming from the tower app STAB mode with throttle = 0.
at that point ANY RCRX error will cause the RCTX switch settings to be newly noticed by APM(which in this case are STAB with throttle 0 and the craft will come sailing out of the sky at no power :(
its been suggested that FS_THR will keep this from happening but it comes out of FS and seeing the backup RCTX with the CRASHME setting(STAB THR=0) and does exactly as commanded given APM is not locking off RCTX xmissions for disastrous mode changes when the Tower app is in control(or ANY GCS actually)
For now the ONLY way to avoid this is to fly with the GCS app or the RCTX but NOT both... or to remove stab mode from the RCTX switch config(and with no throttle kill NOT advisable at this point)..
Also with GCS only again NO throttle kill at present.. so really tablet/GCS mode unsafe at this point unless RCTX switches are manually reset after arming and that again will be seen by APM and perform an inappropriate mode switch, hopefully on the ground.. sigh.. just cant win some days
the flight if you want to play it back is on http://www.exmaps.com/uploads/11257
basically we need an analogy of file locking semantics so that only the GCS in control can command a disastrous mode change and a STOP button needs to be provided in the Tower app for engine kill for Tower only flight... and then the backup RCTX can be used safely...
ps the core developers may or may not agree with the above :)
WOW. I have tested taking control away from Droidplanner with the TX to STAB mode but I always put the throttle stick to center first.
Thanx for the info.
Sorry for hijacking the thread guys. When a guy like Hotel has a bad crash there is usually something to learn.
My first thought on hearing the RCTX beep was.. I wonder if they have flight console locking semantics of any sort on RC RF errors when I heard the motors go to zero...
and of course the RCTX was NOT in hand and only the GCS tablet was ,10-20 meters didnt leave any time to grab the RCTX and bring up to hover throttle..
Would this work with such a charger?
Parallel Charging Board:
That will work but will increase the charge time for each battery added. Two batteries would double the charge time unless you increase the amps.
In this configuration the batteries will try to even out so that all of them have the same charge. So plugging in a fully charged battery will charge the other battery to somewhere in the middle without the charger plugged in.