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Charlie Fox replied to Hugues's discussion Quadcopter X8 configuration in ArduCopter User Group
"I've had great results in various coax set ups using the same diameter but different pitch props, eg, 3.8 & 4.5 or 4.7.

It probably won't be as noticeable on an octocopter but a coax hex with different diameter would probably not fly very well due…"
Jun 13, 2013
Charlie Fox posted a discussion in ArduCopter User Group
Well this has probably been discussed before, but, my searching unveiled nothing.The Basics:Flying at sunset, temperature 12degC, no windAPM2.5+ with 2.9.1bY6 running Turnigy 950kv Motors & ESC, 4S Batteries.This frame had done around 50 minutes of…
May 8, 2013
Charlie Fox replied to Cristian Rougier's discussion Motor spin slow than others in ArduCopter User Group
"When I bench test my octocopter I have a similar issue.

But with props on testing while under the restraint of my hand It's fine.

I think its just the apm trying to work out what is happening and slowing a motor down to try get some sensor input"
Apr 29, 2013
Charlie Fox replied to Charlie Fox's discussion Please Help me decipher the log to work out why I had a fly away in Loiter. in ArduCopter User Group
"I think I found the problem.

New Zealand has a rather magnetic high declination at 24.5deg.

I had left the apm to auto configure the declination using gps... this failed though and set my declination to 0.405!

I think perhaps the copter failing…"
Apr 25, 2013
Charlie Fox replied to Dean's discussion Commercial grade aerial photography
"My advise would be build a cheap quad with the most basic kk flight controller. Get Very good at flying first before you sink any time or money into a large AP platform.

Many people assume flying is easy, based on ardrone or similar experiences.…"
Apr 25, 2013
Charlie Fox posted a discussion in ArduCopter User Group
So I have 2.9.1 on an APM2.5+ and have been doing some bench testing without props.A striking anomaly occurs at low rpm/throttle, it may also happen at high rpm but isn't as clear.If I put the stick up just enough to start all the motors spinning.…
Mar 15, 2013
Charlie Fox posted a discussion in ArduCopter User Group
3 Hours of flawless flight testing using Stab, Stab Simp & Alt Hold, Try Loiter and Bam, Flyaway.Well it could have been a lot worse.I was doing some birds eye view shots of my parents house, Turnigy HAL Frame, converted to coaxial octocopter, 3DR…
Mar 4, 2013
Charlie Fox posted a discussion in ArduCopter User Group
Well this one is really doing my head in.Have been trying to setup the gimbal, but which ever axis is connected to RC11 just twitches randomly and aggressively all over the place.Also as an aside, are RC1-8 the same as outputs 1-8? trying to work…
Jan 28, 2013
Charlie Fox replied to George's discussion What X8 options are out there?
"I'm currently working on a modified HK HAL quad converted to X8 duty.

For better or worse who knows, so far it seems to be okay.  
Posting semi regular updates and photos on my Twitter acct. https://twitter.com/Multicopter_NZ  
It would be flying…"
Jan 23, 2013
Charlie Fox posted a discussion in ArduCopter User Group
Hi All,I'm running the APM2.5+ with Arducopter 2.8.? (The version before 2.9)My Radio is a Spektrum DX8.All of the radio calibration went fine, but I noticed at the time of calibration that the throttle 'green bar' would randomly blip up to half…
Jan 23, 2013