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Germantown, MD


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hobby only


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germantown, md, USA


Activity Feed

AlexP posted a discussion
Hi All,I'm trying to get the MB1240 sonar to work via the ADC 3.3V port on the Pixhawk. I cannot get it to work. The wiki is also very confusing:"Copter:These instructions are for Copter 3.2 and later versions of Plane, Rover.  Setup instructions fo…
Dec 26, 2015
AlexP posted a discussion
Hi,I'm new to Arduplane (lots of experience with ArduCopter) and built a Penguin with 60A ESC and 2815 motor as delivered by readymaderc. With an APM 2.5. The APM is powered by the ESC's BEC.Installed the latest firmware and using the latest MP GCS…
Nov 21, 2013
AlexP replied to AlexP's discussion Waiting for Mavlink occassionaly during flight
"BTW: works fine in the Quad. "
Sep 19, 2013
AlexP posted a discussion
HI All,I have a 3DR and MinimOSD on both a Quad and Octo. On the Octo (both wired the same), I'm get the 'waiting for Mavlink heartbeat' about every 10 seconds or so. It seems more prevalent in Loiter. Where do I start looking? shielding due to high…
Sep 19, 2013
AlexP replied to Randy's discussion ArduCopter-3.0.1 released!
"Randy,
Quick question: my Quad descends almost exactly at the set speeds. However, my Octo simply does not want to go down. It will go down, but as a snail on a threadmill going backwards. I've tried a variety of settings: Throttle Accel, Throttle R…"
Sep 7, 2013
AlexP replied to Terry Brooks's discussion Toilet Bowl Effect
"I never had toilet bowling before doing compassmot. After compassmot, it does... does that make sense? Compassmot yields close to 60%, so I'm going to order the external compass."
Sep 5, 2013
AlexP replied to Randy's discussion ArduCopter-3.0.1 released!
"Does anyone know the default parameters for this release (Quad). Seen them before, but somehow I cannot find them...."
Sep 5, 2013
AlexP replied to Randy's discussion ArduCopter-3.0.1 released!
"Randy, Marco,

Hopefully your expertise will help me. I have had numerous successful enjoyable flights with 3.0.1. However, as indicated before I also had some propellers break in flight. The last time it happened, the Quad ended up flying diagonall…"
Aug 30, 2013
AlexP replied to Randy's discussion ArduCopter-3.0.1 released!
"Hi All,

First of all: after a few months of not flying, I installed 3.0.1 and what a difference that makes!
However, I have a strange problem: My Quad uses black plastic props (not the grey ones), I don't recall if I got them from 3DR, ReadymadeRC…"
Aug 14, 2013
AlexP replied to Craig Elder's discussion APM Copter 2.9.1.b has been released
"I have flown 2.9.1b quite a bit over the past few days. Numerous 'spot on' RTLs (interesting to see the Quad drop out of the sky on descend and arrest the descent the last few meters and do a gentle touch down). Also did a few auto missions (pm me i…"
Apr 14, 2013
AlexP replied to Craig Elder's discussion APM Copter 2.9.1.b has been released
"HI all, One simple question: which parameter in the Advanced Parameter list of MP controls the descend rate during RTL, immediately after RTL_LOIT_TIME has been completed? I know the final descend rate is: LAND_SPEED, but the initial descend rate is…"
Apr 11, 2013
AlexP replied to Randy's discussion ArduCopter 2.9 / 2.9.1 released
"Hi Leonard, Marco, Randy and other experts,

Based on previous posts, this question may be for Randy.
I have hooked up a gimbal, controlled by CH10 (roll) and CH11(tilt) on APM 2.5. When I set gimbal tilt 'Input Ch' to RC6, it does exactly what I wa…"
Mar 16, 2013
AlexP replied to Randy's discussion ArduCopter 2.9 / 2.9.1 released
"Leonard, Randy, Marco and other experts:
First of all, great job on 2.9.1!!! I built a simple Quad with great results using almost stock PID's (0.13 instead of 0.15 on Rate P). Sonar is indeed not necessary and it appears to only screw up things (it…"
Mar 16, 2013
AlexP replied to R. D. Starwalt's discussion APM2.5 5V/Vcc Schematic
"Guys, about protection of the APM. This is what happened to me today:
Hi (again),
 
I’m not having much luck.
Today I experienced a serious problem which destroyed a just purchased APM 2.5, the received MinimOSD as well as the uBlox GPS.
 
The situa…"
Feb 23, 2013
AlexP replied to Randy's discussion ArduCopter 2.9 / 2.9.1 released
"Hello all, but specifically the developers!

Maybe you could have a look at attached log files. In response to my earlier post, I did a short flight with INAV, MOTORS and RAW enabled. My Accel-Z seems to be OK (see below). What I experienced is:
- t…"
Feb 22, 2013
AlexP replied to Randy's discussion ArduCopter 2.9 / 2.9.1 released
"Hello all,

I've just uploaded 2.9.1. in to my overpowered Octo. It was the first time flying after the upgrade from APM 1 to APM 2.5. After adjusting THR_MID to 300, she hovers nicely in Alt-hold.

However, I noticed that as soon as the Octo is arm…"
Feb 22, 2013
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