Rob_Lefebvre
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Rob_Lefebvre's Discussions

For Sale: Like new Canon SX260

Started Apr 19, 2016 0 Replies

Bought an SX260 a while ago for mapping, but never ended up using it beyond a couple quick test flights.  Like new condition. Complete with box, etc.  These are sought after because of CHDK and NDVI…Continue

AC3.4 Discussion

Started this discussion. Last reply by David Boulanger Apr 28, 2016. 6 Replies

Hello,I just wanted to start a post discussing AC3.4.  People should be aware that I'm not reviewing the code in Master or doing test flights at this time.  Recently, a large set of changes went into…Continue

Notification: My Community Support Ending

Started this discussion. Last reply by Mark Lewus Feb 14, 2016. 89 Replies

Hello everyone, I feel the time has come to make an announcement, which I've been avoiding for a few weeks now, but which I can't put off anymore.As some people are aware (and some maybe not) for a…Continue

AC3.3 Vibration Logging Discussion Thread

Started this discussion. Last reply by Forrest Frantz May 20, 2016. 58 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

 

Rob_Lefebvre's Page

Latest Activity

Rob_Lefebvre commented on Gary Mortimer's blog post No more $5 FAA fee, John Taylor wins his case.
"I don't know. I don't think they know how good they had it.Canadians wish we could pay just $5 to have the government leave us alone.We don't have registration, but we are now required to have our name, address and phone number…"
Saturday
Rob_Lefebvre commented on Olivier's blog post Congratulations to accepted Ardupilot students, Google Summer of Code 2017
"After it has deployed a UGV, yes."
May 4
Rob_Lefebvre replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Gary, I actually think that for basic hovering operations, or flight at low speeds, or in light wind conditions, multirotors actually make more sense.  You basic consumer aerial video, or even professional stationary aerial video, a multirotor…"
Apr 30
Rob_Lefebvre commented on sander's blog post DeltaQuad VTOL completes 100KM autonomous mission carrying a 1KG payload
"Ok, yes, I assumed that you used low wind conditions as most do for these tests.  How sensitive is the airframe to windspeed:  ie: how steep is the power/speed curve as it's flying upwind? "
Apr 30
Rob_Lefebvre commented on sander's blog post DeltaQuad VTOL completes 100KM autonomous mission carrying a 1KG payload
"Nice achievement.  What were the wind conditions at the time?"
Apr 30
Rob_Lefebvre replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Yes.  Again, my intent here is not to say that electric multirotors have no place, or that helicopters are just better. It's just to have an honest discussion about the issues. We can't advance the technology if we don't tackle…"
Apr 30
Rob_Lefebvre replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Peter, This idea that "helicopters are hard to fly" is just completely untrue.  It's a very common misconception that permeates the drone industry.  But commonality doesn't make it true. Helicopters are not hard to…"
Apr 30
Rob_Lefebvre replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Gary, Thing is, I don't really considering anything shown in that video to be dynamic flight.  It's just really easy hover manoevering.  Compare that the performance shown here, skip ahead to 1:50 and hang on to your…"
Apr 29
Rob_Lefebvre replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Yes, in a multirotor, the rolling moment in lateral flight cancels out across the sum of the disks.  However, there is still the pitching up moment that remains.  This ends up being resisted by the autopilot system.  You can see it…"
Apr 29
Rob_Lefebvre replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"You can buy a single seat helicopter, that will do 80mph for over an hour, today, for about $50,000.  The only advantage to the KittyHawk, is that it has an autopilot so anybody can fly it. So put an autopilot on the kit helicopter.…"
Apr 29
Rob_Lefebvre replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Totally seat of the pants engineering.  That's just my gut feel and what I've observed to be true. Don't get me wrong.  There are large multirotors with 30" propellers that fly well.  It's just that they…"
Apr 29
Rob_Lefebvre replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"That would take care of the roll torque from the main motors, but not the flap-back (pitching up moment) torque in forward flight."
Apr 29
Rob_Lefebvre commented on Chris Anderson's blog post More powerful Pixhawk 3 coming soon
"Ok, then buy the carrier board made by Hex.  I fail to see the issue here.  Your argument would be similar to somebody saying something like "The Solo was intended initially for 3DR as a manufacturer of drones for carrying a GoPro…"
Apr 29
Rob_Lefebvre replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Unfortunately, no, I don't think so. You should get a copy of Gordon Leishman's Principles of Helicopter Aerodynamics, even if only to read the first chapter, which is a primer on the development of helicopter technology.  Many…"
Apr 28
Rob_Lefebvre replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"Brad!The best thread in the history of DIYDrones lives.That Olaeris AEVA machine.... count me as being skeptical.  Looks like nothing but a bunch of renderings to me.  Coupled with half an order of magnitude improvement over anything…"
Apr 28
Rob_Lefebvre commented on Chris Anderson's blog post More powerful Pixhawk 3 coming soon
"@Caid:  Do you guys have any solid evidence yet that any of those theoretical benefits actually improve performance?OneShot already seems to be causing a lot of maintenance issues from what I can see."
Apr 25

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

Procyon 800E Enters Limited Production

Posted on December 16, 2016 at 12:00pm 18 Comments

NOVAerial Robotics is pleased to announce that the Procyon 800E drone helicopter has finished it’s prototype and testing phases and is beginning limited production and delivery to commercial companies worldwide.

The first customer to place…

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NASA Chooses Helicopter For MARS Drone

Posted on September 2, 2016 at 10:53am 9 Comments

(Originally posted on NOVAerial Robotics Blog)



NASA is now planning on using a UAV in addition to the Rover in order to explore Mars.  The reasons are very simple, and parallel the desire to use UAV’s on earth.  Having a…

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Procyon 800E Phase 2 Beta Testing Begins

Posted on July 21, 2016 at 5:59pm 42 Comments

( Blog Reposted From Here )

NOVAerial Robotics is pleased to announce that Phase-2 beta testing of the revolutionary…

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Comment Wall (17 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,
Moderator
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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