Andy Demartini
  • Male
  • Trinity, FL
  • United States
Share Twitter

Andy Demartini's Friends

  • David Marra
  • Ryan Oliver
  • james sowell
  • Michael Oborne
  • DougB
  • Brian Wolfe

Andy Demartini's Groups

Andy Demartini's Discussions

MP Not Calc'ing Az and El to the Airplane

Started this discussion. Last reply by Andy Demartini Feb 16, 2013. 8 Replies

Auto Takeoff Sequencing Problem

Started this discussion. Last reply by Carl Lipo May 20, 2013. 19 Replies

APM Planner Unable to Connect

Started this discussion. Last reply by Chris Anderson Jul 22, 2012. 14 Replies

 

Andy Demartini's Page

Latest Activity

Andy Demartini replied to bradley.doug32's discussion X-8 In the post... in the group X8
"You could also look at -- http://www.troybuiltmodels.com/items/TBMFPVX8-84.html Their kit price is US$199 compared to FPVModel's US$299.  Big savings right there. "
Mar 12
Andy Demartini replied to li bo's discussion About v2.76 automatic navigation error in the group ArduPlane User Group
"I also saw this message when a new flight plan was loaded into APM 2.75, followed by switching from manual to automatic mode.  This would suggest a problem with replacing a flight plan or altering steps.  The only way I found to clear this…"
Nov 15, 2013
Andy Demartini replied to Antonio Alfaro's discussion X8 take-off using catapult in the group ArduPlane User Group
"OK, here's the file. "
Nov 8, 2013
Andy Demartini replied to Antonio Alfaro's discussion X8 take-off using catapult in the group ArduPlane User Group
"Yes, that is what we use, THR_SUPP_MAN = 0.  This requires a little history to explain.  At first, APM autotakeoff did not suppress the throttle and the prop would spin as soon as you went to AUTO mode.  This is considered by many to…"
Nov 7, 2013
Andy Demartini replied to Antonio Alfaro's discussion X8 take-off using catapult in the group ArduPlane User Group
"Paul, I guess I was not clear enough.  AutoTakeoff worked as expected only when the RC transmitter throttle was advanced.  The APM detected acceleration, unsuppressed the channel and set the channel output to the configured maximum, which…"
Nov 7, 2013
Andy Demartini replied to Antonio Alfaro's discussion X8 take-off using catapult in the group ArduPlane User Group
"Antonio, We made several tests this morning with our EZ Star "testbed" plane.  This uses the same (APM 2.75) firmware but does not have the size risk of the X-8. Prior to starting, I ensured that we were using the same parameters you…"
Nov 7, 2013
Andy Demartini replied to Antonio Alfaro's discussion X8 take-off using catapult in the group ArduPlane User Group
"Antonio, I am going to try this parameter set tomorrow morning and will report how it performs.  But, I do have one question .... Setting THR_SUPP_MAN to 1 is for setting ground idle with glow motors.  If you did set this to 1 and then…"
Nov 6, 2013
Andy Demartini replied to Antonio Alfaro's discussion X8 take-off using catapult in the group ArduPlane User Group
"I have been trying this with a X8 and something appears to have changed in the recent firmware.  AutoTakeoff was working earlier this year, arounf the March timeframe.  It stopped working reliably when the firmware was updated to ArduPlane…"
Nov 1, 2013
Andy Demartini replied to Antonio Alfaro's discussion Crash while stabilized mode in the group ArduPlane User Group
"This doc page in the "new" wiki still describes the old firmware.  The current APM version "requires" a manual level before any flight.  There is no option for auto leveling as in earlier firmwares.  The level…"
Aug 26, 2013
Icarus replied to Andy Demartini's discussion X-8 Leveling Reference Point in the group X8
"I've found the best airframe performance (trim and efficiency) to be slightly nose high, about 3 or 4 degrees AoA. I just put the x8 on a level surface and put the lid under the nose to lift it about 1 inch, that gives a few degrees nose up and…"
Aug 19, 2013

Moderator
Graham Dyer replied to Andy Demartini's discussion X-8 Leveling Reference Point in the group X8
"As I understand it, the new levelling procedure uses 6 reference points to find level (of the APM) hence the 'level dance' we're all doing now. You can do it with the APM outside the plane or copter as it's APM specific rather…"
Aug 19, 2013
Andy Demartini added a discussion to the group X8
Thumbnail

X-8 Leveling Reference Point

As of the more recent versions of ArduPlane, the firmware no longer does an automatic level on startup.  Instead, that has become one of the initial startup steps when installing it in a new plane.In the past, I have glued a bubble sight onto the rear spar enclosure and used that as "level".  Recently, someone else said they use the inside floor near the CG line.  Both seem ok, but both are different. I just looked at the wing and the underside is angled slightly node-down with my bubble level…See More
Aug 19, 2013
Andy Demartini replied to Tom Gilmour's discussion ArduPlane Level Calibrate Accel Greyed out. Can't see Manual Level option
"Removing the Mission Planner's manual leveling ability was not an oversight, it appears to have been directed by "Tridge" from the developers group.  Here's his email to Michael Osborne telling him to disable that ability in…"
Jul 29, 2013
Andy Demartini replied to Tom Gilmour's discussion ArduPlane Level Calibrate Accel Greyed out. Can't see Manual Level option
"This is a pretty big change to how APM has worked historically.  I believe the change was made to prevent problems with an airborne restart, but this is now a "required" step in all setups.  I saw the problem two days ago with a…"
Jul 25, 2013
Andy Demartini replied to Tom Gilmour's discussion ArduPlane Level Calibrate Accel Greyed out. Can't see Manual Level option
"Hi, I am also having this problem.  I have a new, unflown APM2.5 and just loaded 2.74b firmware.  The box is sitting level on my bench but starts up reporting node up of 0.2 units and left roll of 2.2 units.  I've tried a reset…"
Jul 24, 2013
Carl Lipo replied to Andy Demartini's discussion Auto Takeoff Sequencing Problem
"Has the code been updated (as of 5/20/2013)?"
May 20, 2013

Profile Information

About Me:
I am a private pilot (PP,MEL,MEI) and have done a lot of professional work with RF modems and high speed data links.
Please tell us a bit about your UAV interest
So far, I've worked with the EasyStar platform, Dragon DOSD+ and now the ArduPilot Mega. Very impressed with Mission Planner and can see a lot of potential in the combination.

Andy Demartini's Videos

  • Add Videos
  • View All

Comment Wall

  • No comments yet!

You need to be a member of DIY Drones to add comments!

Join DIY Drones

 
 
 

© 2014   Created by Chris Anderson.

Badges  |  Report an Issue  |  Terms of Service