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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 TriCopter Improvements, need Input and Testers!

Started this discussion. Last reply by Tom Mahood May 15. 9 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 2 hours ago. 57 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

AC3.3 TradHeli Release Discussion

Started this discussion. Last reply by Rob_Lefebvre May 15. 2 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

 

Rob_Lefebvre's Page

Latest Activity

Ultrafuge replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"Hi Rob, another nice feature for those who like to play with parameters. On the other hand there are FBL-systems like Graupner GR-18 that have a default PID setting which is good for at least 450 to 700 class and the tuning freaks can use the…"
2 hours ago

Developer
Rob_Lefebvre replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"Please note, the land detector on rc5 is totally broken, no point testing that.  You can fly it, but don't do auto-lands.  Or if you do, just shut it down as soon as it touches. "
yesterday
Ray Gamero replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"Flashlog Link See above for the flash log.  The yaw problem happened half way through this log.  I switched to loiter before starting the rotor.  On the ground the heli had a significant yaw nearing flight RPM."
yesterday

Developer
Rob_Lefebvre commented on Armin Strobel's blog post A 3D printed UAV prototype which makes use of the advantages of 3D printing
"Very cool. Nice work.  I've been thinking of doing the same thing, making a ducted fan copter on a 3D printer.  "
yesterday
Ray Gamero replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"No, I was flying rc4. Landing detector worked on that. I'll try to land on rc5 as soon as the rain stops. One thing I found that I didn't see in 3.2. If I switch to loiter or auto after spool up, no problem. Today, however, I tried to arm…"
yesterday

Developer
Rob_Lefebvre replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"On Friday, I played around with the yaw controller a little bit, I added a Yaw Acceleration Feedforward, which is different from the Yaw Rate Feedforward you're already familiar with.  The idea being it gives the servo a little more…"
yesterday

Developer
Rob_Lefebvre replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"Warning #2 for RC5: I accidentally broke the Landing Detector.  It will probably never trigger.  You should land in Stabilize mode, or be prepared to shut down the motor as soon as it touches the ground in Alt_Hold, Loiter, Auto, etc."
yesterday

Developer
Rob_Lefebvre replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"Were you flying rc5? I believe I accidentally broke the landing detector for tradheli on RC5."
yesterday

Developer
Rob_Lefebvre replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"Hi Ray, yes, this is true.  I'm actually flying on 20Hz with my Goblin 380 and it's OK, but it's a very smooth heli being all belt drive, no gears, and only 2 shafts. So it is possible.  IIRC, I've had other helis…"
yesterday
Ray Gamero replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
" zhangpengsir I looked at your logs and see that near the point you lift off, your Y axis accerlations are near +- 20gs. This is most likely caused by main and tail rotor vibrations reacting/amplifying with the ground through your skids.…"
yesterday
Ray Gamero replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"I just realized that when you upgrade to 3.3, they replace the INS_MPU6K_FILTER with the two parameters INS_ACCEL/GYRO_FILTER!  These default to 20Hz which makes measured vibrations quite a bit larger (since I was set to 10Hz…"
Monday
Ray Gamero replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"I had a couple of weird take offs after upgrading to 3.3 from 3.2.1.  Once I had the exact same pirouette on takeoff using a loiter liftoff.   This, I feel was due to vibe problems.   My filter was set to 10 hz on 3.2.  When I…"
Monday
Ray Gamero replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"Rob, thanks for the coding and the warning on rc5. After tracking down every vibe on my heli (there are a lot of sources), a complete redesign of my mount, and changing my filter rate from 20 to 15 hz, I had a very success flight today. Stabilize,…"
Monday
Ray Gamero replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"That sounds good Rob, thanks."
Monday

Developer
Rob_Lefebvre commented on Teejay's blog post Pixhawk packaging?
"Oh, and Nick appears to support his customers.  You can actually talk to him."
Sunday

Developer
Rob_Lefebvre commented on Teejay's blog post Pixhawk packaging?
"Agree John.  I like to seem some hardwear variations instead of pure copies.  And I don't mind if they say "Pixhawk compatible" in the description.  But it's wrong to use the name as it's copyrighted. My new…"
Sunday

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…

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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…

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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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