Rob_Lefebvre
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Rob_Lefebvre's Discussions

For Sale: Like new Canon SX260

Started Apr 19 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. 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. 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. 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

Peter Webster replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"Excellent info! Just setting up my first 3.3.3 in a TRex500 so I'll be trying your params. I notice there are apparently 3 versions of 3.3.3 here: http://firmware.ardupilot.org/Copter/stable/PX4-heli/ v1, v2, v4What difference between these? As…"
14 hours ago
Rob_Lefebvre commented on Phillip Kocmoud's blog post Introducing the AUAV X2.1 Flight Controller
"Jon, I think that the X2.1 is pin compatible with Pixhawk, as the X2 was, so it should work right out of the box.I'm not sure, but, I think that's what they're doing."
19 hours ago
Anthony Sive replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"Happy Days! I've solved the problem. Mission Planner has a minimum Throttle_Accel_P at 0.5 and in the extended parameter screen it won't let you input a value below this number. I set Chan 6 from 0 to 0.5 and found the best setting to be…"
yesterday
Rob_Lefebvre commented on Chris Anderson's blog post Inexpensive laser time-of-flight sensor with 2m range
":("
yesterday
Anthony Sive replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"It's the althold parameter. I'm running fixed rpm and use collective to maintain altitude so I'm not sure if its a "power" parameter I need to change or something to do with pitch. Here is another log file."
yesterday
Rob_Lefebvre commented on Phillip Kocmoud's blog post Introducing the AUAV X2.1 Flight Controller
"Nice, looking forward to trying one. :) Yeah, the Pin header is a plus/minus thing.  They're big and bulky. But I do grow tired of trying to sort out cabling with other connector systems."
yesterday
Rob_Lefebvre commented on Chris Anderson's blog post Delft VTOL project uses helicopter-style main rotor for effeciency
"Oh, I forgot a question.  The rotor blades, are they totally custom made?  Or are you doing something like taking tmotor blades and putting them in a helicopter rotor head?"
yesterday
Rob_Lefebvre commented on Chris Anderson's blog post Delft VTOL project uses helicopter-style main rotor for effeciency
"Ok, so I crunched a few numbers.  Based on 1m rotor span, 4kg AUW, 24V (I typically use 4V/cell unless better data is available), 20A hover. And 2x 4500mAH. Disk Area: 0.785m2 Disk Loading: 5.09kg/m2 Hover Power: 480W Specific Hover Power:…"
yesterday
Anthony Sive replied to Rob_Lefebvre's discussion AC3.3 TradHeli Release Discussion
"I'm struggling to get my Logo 400 to fly in Alt Hold without it bouncing up and down. What am I doing wrong? Log file attached. Thanks in anticipation."
Saturday
Rob_Lefebvre commented on Chris Anderson's blog post Delft VTOL project uses helicopter-style main rotor for effeciency
"Very interesting system here Kevin.  I'd like to have a look at some of the numbers. What is the rotor diameter?So you're saying 40A to hover, at 24V or 48V?  It's not clear from the way it's worded."
Saturday
Rob_Lefebvre commented on Chris Anderson's blog post Microbial, blood transport by Pixhawk-powered drones found safe
"I'm not sure about transporting biological samples like that.  They know that sometimes these things crash, right?  At least put them in a secure metal container, please."
Sep 15
Rob_Lefebvre commented on Chris Anderson's blog post OSRF (ROS) gets Toyota funding, creates for-profit arm
"Does it say anywhere how much the OSRC investment is?  I don't see that. It's amazing how some change from between the cushions of an industrial giant can completely change the fortunes of an organization like ROS.   At Ford, I…"
Sep 15
Vadzim Chareuka commented on Rob_Lefebvre's blog post Procyon 800E Powertrain and Control Systems Revealed
"We sold today 36 helicopters to Russia. We've already had more than 10 cases of refusal servo. We use only expensive servos Futaba. Unfortunately servo failure by 99 percent leads to an accident. The aid can only come rescue system, such as a…"
Sep 15
Rob_Lefebvre commented on moglos's blog post Anatomy of a 425km Flight
"Giovanni, I don't suspect the servos will actually benefit that much.  If it was pure manual control it might.  But since this is a gyro controlled machine, the hysteresis of the Analog servos will result in them actuating back and…"
Sep 14
Rob_Lefebvre commented on moglos's blog post Anatomy of a 425km Flight
"Curious if you did actual power system performance testing? Did you compare, for example, a HobbyWing Platinum Pro ESC to the ZTW?  If now, you should.  In independent testing, the typically are head and shoulders above others in…"
Sep 14
Rob_Lefebvre commented on moglos's blog post Anatomy of a 425km Flight
"Amazing! I don't think the monoblade prop is such a great idea.  I understand the theory on why it's more efficient, but in practice you will have balance problems.  You need not only a static balance, but a dynamic balance…"
Sep 14

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

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 43 Comments

( Blog Reposted From Here )

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

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Procyon Helicopter Demonstrates 1 Hour Flight with 1KG Payload

Posted on April 19, 2016 at 8:00pm 17 Comments

Autonomous Systems Cooperative is pleased to present a new helicopter design which has been engineered from the ground up for UAV usage. Today, on just its 3rd test flight, the Procyon 800 Electric helicopter design demonstrated capability of…

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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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