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Rob_Lefebvre
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  • Ontario
  • Canada
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Rob_Lefebvre's Groups

Rob_Lefebvre's Discussions

AC3.3 Vibration Logging Discussion Thread

Started this discussion. Last reply by Thorsten Jul 24. 21 Replies

Start this thread to have a place for focused discussion of the new vibration logging function of AC3.3.  I'll start by copy-pasting my initial discussion from the AC3.3 beta testing thread.Continue

AC3.3 TriCopter Improvements, need Input and Testers!

Started this discussion. Last reply by Rob_Lefebvre Jul 7. 11 Replies

As part of my work to fix the RC Map problem for AC3.3, it makes sense to fix the Tricopter tail servo problems at the same time.  The timing on this work is really tight as we're down to the wire to…Continue

AC3.3 TradHeli Release Discussion

Started this discussion. Last reply by Ultrafuge 22 hours ago. 122 Replies

WARNING to TradHeli users:Do not attempt to fly AC3.3 until you hear otherwise from me.  I have not even bench tested it yet, let alone test flown it.  There are quite a lot of changes that have gone…Continue

760uS Rudder Servo Support

Started May 1 0 Replies

Hey guys, I've seen the question asked several times over the years, about whether or not Arducopter could support high speed 760uS rudder servos.  I remember trying to help somebody with it a couple…Continue

 

Rob_Lefebvre's Page

Latest Activity

Ultrafuge replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"Hi, I just installed 3.3 rc-8 using MP 1.3.30 and the default values are for RATE_PIT_P=0.020 and RATE_RLL_P=0.020. I for sure never changed these settings (only calibration - no flying yet), but after a while both were on 0.434 instead of 0.020.…"
22 hours ago

Developer
Rob_Lefebvre commented on Jeevan Kalanithi's blog post More gimbal news
"Eric, you can't replace the isolator with stiffer mounts, because then there's not enough isolation, and vibration shows up on the video."
yesterday

Developer
Rob_Lefebvre commented on Gary Mortimer's blog post T3 Back to the Future
"No, that was my last run,   Too much wind to be competitive now.  "
Friday

Developer
Rob_Lefebvre commented on Gary Mortimer's blog post T3 Back to the Future
"What was the airspeed?  The bank angles are wild!  Copter code just doesn't allow for that unfortunately.  Nice job.  Can't believe how well that flies."
Friday

Developer
Rob_Lefebvre commented on Chris Anderson's blog post Pixhawk-powered solar plane sets new endurance record: 81 hours!
"Hmmm... I'm not sure how TAM gets off claiming the world record, when somebody else flew a model airplane across the Atlantic in the 90's."
Thursday

Developer
Rob_Lefebvre commented on Gary Mortimer's blog post T3 Back to the Future
"I can definitely fly today, I just don't think I can put in a competitive time on account of wind.  I won't be able to do 35 m/s ground-speed, heading upwind. "
Thursday
Jason Franciosa replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"I finally found out. Yes, it is acceleration FF and only applies to the yaw for right now. the pitch and roll AFF currently do nothing. It's a parameter rob is playing around with. My biggest complaint with Traditional Heli so far is the lack…"
Thursday

Developer
Rob_Lefebvre commented on Gary Mortimer's blog post T3 Back to the Future
"Ok, I think this will be my final entry, as the weather won't be good over the next couple days. Light winds, but I need no wind to do this as we don't have an airspeed sensor and I'm really pushing the limits.  Did a couple more…"
Thursday
Fred Goeddert replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"Rob on 25.5.2015 is mentioning that he has added a Yaw Acceleration FF. I guess that RATE_PITCH_AFF means RATE_PITCH Acceleration Feed Forward. Because I have the same questions but have not found more INFO yet."
Wednesday

Developer
Rob_Lefebvre commented on Chris Anderson's blog post Pixhawk-powered solar plane sets new endurance record: 81 hours!
"Fantastic work. I would think that after the battery has achieved full charge during the day, it should start to climb as an alternate method of storing excess energy?  I realize that might not be practical for the flight test, but during…"
Wednesday
Jason Franciosa replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"For some reason in RC8 the FF Values under extended tuning are grayed out and can not be adjusted. Also, what is the difference between RATE_PITCH_VFF and RATE_PITCH_AFF?"
Tuesday

Developer
Rob_Lefebvre replied to Pmarche's discussion The Truth about Pixhawk and some ESCs with Low KV motors in the group PIXHAWK
"I've built several multirotors, and have yet to run into a sync problem.  I'm not entirely sure why that is, but I like to think it's due to proper construction techniques (using the signal ground wire long before it was accepted…"
Jul 27

Developer
Rob_Lefebvre replied to Randy's discussion Copter-3.3 beta testing
"But it's not clear to me how you can have low vibes in the Vibe log, but high vibes in the IMU.Accel logging."
Jul 26

Developer
Rob_Lefebvre replied to Randy's discussion Copter-3.3 beta testing
"Yeah, I've talked about this before, we need to have a better understanding of what we're seeing in the data. My gas helicopter has really high vibration visible on the IMU.Accel logs, but the Vibe analysis shows the vibe levels very low.…"
Jul 26

Developer
Rob_Lefebvre replied to Randy's discussion Copter-3.3 beta testing
"The the waves in the Accel readings are totally normal and expected if flying aggressively.  When leaned over, the X and Y show non-zero.  For example, if leaned over 45° in roll, you'd expect the AccY to be +/- 7.  And the…"
Jul 26

Developer
Rob_Lefebvre replied to Randy's discussion Copter-3.3 beta testing
"Adolfo, your accel graph looks really good.  The "grass" is short as you say.  The waves are almost certainly actual flight loads.  When the Z-axis moves to -15, that's because you're accelerating at 1.5G. "
Jul 26

Profile Information

About Me:
Mechanical Engineer
Arducopter TradHeli Lead Developer
Please tell us a bit about your UAV interest
Aerial Photography
Light Industrial Applications
Traditional Helicopters
Hometown:
Brighton Ontario Canada

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Rob_Lefebvre's Blog

New Drone Service Tests Commercial Usage Laws in Canada

Posted on March 20, 2015 at 8:58am 19 Comments

http://bigwhite.cmail2.com/t/ViewEmail/r/3059DF9ADD1D1A942540EF23F30FEDED/D84B544420A969371726EA5DA1051479

This just popped up on a Canadian Commercial Operator Facebook group and we're discussing the implications and legal…

Continue

CBC Documentary: The Age of the Drone

Posted on February 18, 2015 at 8:13pm 3 Comments

On February 19th at 9PM, the Canadian Broadcast Corporation will air a new documentary on drones, following up the one they did last year called Remote Controlled War.  Last year's was more focused on the military aspects, this new one is more commercial/recreational.

I'm not sure what the availability will be for those outside Canada.  Hopefully our…

Continue

Iris/Pixhawk Cold Weather Testing

Posted on February 18, 2015 at 5:00pm 27 Comments

Last weekend I drove up north a bit for some real cold weather testing of my Iris+ equiped with Pixhawk.  I had to get up early in the morning to catch -30C temperatures which is about as cold as I'm interested in testing.  At -30C, my gloved fingers froze after a few minutes.  Not quite frostbite, but deep into pain territory.

Spurred…

Continue

Canada to Regulate Recreational Flights Like Commercial

Posted on February 11, 2015 at 1:30pm 7 Comments

I'm not sure if anybody who is not a member of Unmanned Systems Canada can see this report or not:

https://www.unmannedsystems.ca/media.php?mid=4633

So I will summarize:  At a meeting of the International Civil Aviation Organization in Montreal last week,…

Continue

Comment Wall (13 comments)

At 5:59pm on November 30, 2011,
Developer
Jason Short
said…

Chris is the Admin. He can help you.

Jason

At 8:22pm on May 16, 2012, Carl La France said…

Robert thanks for your input the 1/8 aluminum on  on the fuselage will be a milled out channel running  half way down the side of the plane    to attach the wing the horizontal stabilizer and the vertical fin to a Exoskeleton about 1 1/2 pounds the rest of the plane is foam and fiber glass there was no distortion welding we had it clamped down  pretty good Thanks again Carl

At 4:26am on July 26, 2012, OG said…

Thanks for you assistance with my ecommerce sight yesterday . I appreciate it so much I give you my cost your first porches.

At 6:17pm on November 27, 2012, Dwgsparky said…

Hi Robert, sorry I missed your request. still getting used. to this system.

Sorry, not waterslides,,,, Kiddie trains from Granby.

At 7:53pm on January 24, 2013, Joshua Johnson said…

My bad I was just trying to give new members someone they can ask questions to because the site is super confusing at first for a while when your new. Ill stop doing it!

At 11:47pm on April 23, 2013, Manuel Zangenfeind said…

Dear Mr. Lefebvre,

I saw some videos from your heli in Loiter Mode and thought wow this heli is standing rigid in the air.

I'm using a TREX 700E and want to fly this heli with apm 2.5 version 2.91 autonomously.

Currently I want to adjust the PID parameter. The stabilize and the Altitude Hold Mode is working perfect, but I have some problems with the Loiter values.

So would it be possible to send me your PID values of the loiter mode? I think they have to be very similar.

Thanks.

Nice Greets from Austria

Manuel

At 2:56pm on July 8, 2013, Jonathan Weisburst said…

Hi Mr. Lefebvre, 

Thanks for getting back to me.  Do you have any suggestions in terms of renting or hiring aerial videography crews or drones?  

All the Best, 
Jon

At 11:06pm on June 3, 2014, Matt said…

Hi Rob,

Interested in making a Tandem out of 2x 800 sized helicopter. Just interested to discuss your thoughts.

At 7:34pm on July 12, 2014, Eric said…

Hi Rob, I saw your DroneCon talk on youtube (which was great, thanks!), and it looks like you got cut off towards the end there. By any chance is the full slide deck available somewhere? Or was there much more left? Thanks!

At 3:02am on August 1, 2014, Artem said…
Hi Rob, i know you had a lot to do with AC yaw control, could you confirm if motor values are used in the formula for the yaw servo control? In other words if running a motor in a wrong direction would affect the yaw control. If so is this something that appeared in the code since 3.1.3 or was it there before? Thank you!

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