Today I maidened my 3DR hexa-B with sonar. In my basement. It was snowing outside. Like crazy. Took it up about 2 feet. Moved it around a bit Set it down. And gasped for joy. Nice stuff. It has APM 2.5, v2.81 SW, ublox GPS, and sonar. Roll was fine but pitch was a bit twitchy - will be tuning before anymore flying.

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Comment by Oliver Sumpton on December 30, 2012 at 11:07pm

Congrats Tim! Looks great ;)

Comment by Eagle on January 1, 2013 at 12:05am

+1 Congrat Tim!  genuine parts! good!

Comment by Tim Green on January 1, 2013 at 9:32pm

Flew again today, a couple feet off the ground, indoors.  Twitches sometimes.   But, boy oh boy - this is fun.

Maybe because I'm using a Futaba 12FG with a 6014 rx.  Apparently, the PPM needs nested IRQs to work with Futaba rx's.  Or maybe it's me, flying for the first time.  Anyway, downloaded the hex file, for updating the APM2.5 PPM.  Looked at the instructions, and couldn't find the "Flip" program the instructions used to update the PPM.  So, I'll put this off for a bit, until it gets sorted out.

Otherwise, it flies nicely in stabilize mode using the stock tuning parameters. 

I found out, that for me, flying in close quarters was easier in stabilize mode, compared to flying in simple stabilize mode.

But - I really need to get this thing outside, or into the local sports dome on RC night.

 

Comment by Oliver Sumpton on January 1, 2013 at 9:47pm

Your Hex will be a lot more stable when you get it above ground effect, which will be at least 3-4 feet.

Be careful indoors. It can get away from you so quick. Also I highly recommend not attempting Position Hold indoors at all, ever. 

Damn nice tx/rx hardware. Maybe try connecting your rx up via 5+ PWM inputs instead of via PPM sum and see if there's any difference in how it feels. Wait till you're outside. You could also check your logs after a short flight of using PPM sum and plot your RC inputs to check if there are any weird spikes.

Good hunting ;)

Comment by Tim Green on January 1, 2013 at 10:27pm

I've been using 5 PWM inputs.  I'd like to go with the PPM though, but couldn't determine which pins on the APM2.5 accept a PPM input.

Comment by Oliver Sumpton on January 1, 2013 at 10:30pm

If you jumper RC inputs 2 & 3 on your APM, you can feed PPM into input 1.

see: http://code.google.com/p/arducopter/wiki/PPMsumRC

Comment by Tim Green on January 1, 2013 at 10:38pm

Mighty kind of you.  Thanks.  I'll see if I don't have a PPM rx in my kit, if not, there's a FrSky TFR4 rx that's FASST compatible and has PPM output.

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