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Rob_Lefebvre
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Rob_Lefebvre's Discussions

Helicopter Vibration Levels

Started this discussion. Last reply by Todd Urban on Saturday. 13 Replies

I just wanted to make a post to specifically address the issue of vibrations on helicopters, as I am seeing quite a few logs which exhibit excessive vibrations. This not only affects Loiter, but can…Continue

Warning about Helicopter Power Supply!

Started this discussion. Last reply by Vlastimil Vrskovy Jul 2. 27 Replies

I've posted about this before, but I feel I must reinforce this:You MUST use a completely independent power supply for your APM or Pixhawk than you use for the Servos.  DO NOT use one BEC to supply…Continue

Arducopter 3.2 Warning

Started this discussion. Last reply by Rob_Lefebvre Jun 5. 4 Replies

Just wanted to put out a warning to everybody, that you should not be testing any of the 3.2 Release Candidates for Tradheli until I say so.At this time, I have not flight tested 3.2rc1 or rc2. I…Continue

Who wants to alpha test Flybarred Acro code?

Started this discussion. Last reply by Rob_Lefebvre May 27. 79 Replies

I am attempting to fix the flybar acro code, wanted to get it out with the upcoming 3.1.3 release, but I'm in a bit of a pickle.  It compiles in Arduino, but won't compile in Make for PX4.  I assume…Continue

 

Rob_Lefebvre's Page

Latest Activity


Developer
Rob_Lefebvre commented on Rob_Lefebvre's blog post Helicopter Presents Attractive Alternative to Multi-rotors and Fixed-wing UAVs
"Yeah, I never tried it, and don't recommend it.  I'm 99% sure you won't get a good result, and it may crash your heli. Autotune does not look at the Rate FF, which is really needed for good control.  And the lowest Rate P…"
7 minutes ago
David Boulanger commented on Rob_Lefebvre's blog post Helicopter Presents Attractive Alternative to Multi-rotors and Fixed-wing UAVs
" Joseph,  Don't do it.  From what I have read from Rob it won't go well. Regards, David R. Boulanger"
10 minutes ago
Joseph commented on Rob_Lefebvre's blog post Helicopter Presents Attractive Alternative to Multi-rotors and Fixed-wing UAVs
"Has anyone tried auto-tune on a traditional helicopter? "
20 minutes ago

Developer
Rob_Lefebvre commented on Chris Anderson's blog post Droneshare now has No-fly Zones
"This is great.  This is not a created problem, this is a very real problem, and a good start to a solution. One thing I noticed is that in my area, MP indicates a lot of "seaplane" airports.  We have 10 bazzillion lakes up here,…"
3 hours ago

Developer
Rob_Lefebvre commented on Alex Zarenin's blog post Yet another Flight Control Board
"1kHz is basically a straight multiple, and won't do as much to eliminate aliasing as two frequencies with different roots.  1kHz and 333Hx will both cause aliasing with frequencies of 1kHz, 2kHz, etc. 800Hz and 1kHz will only both alias…"
yesterday

Developer
Rob_Lefebvre commented on Bob's blog post Amateur drone pilot finds man missing for three days
"This is an invalid argument.  The FAA has absolutely no problem with homemade unregulated airframes flown by "pilots".  They DO have a problem with the same, or even professionally made airframes, flown by responsible,…"
yesterday

Developer
Rob_Lefebvre commented on Bob's blog post Amateur drone pilot finds man missing for three days
yesterday

Developer
Rob_Lefebvre commented on Bob's blog post Amateur drone pilot finds man missing for three days
"The sad part is, this guy's company just popped up on the FAA's radar, and now he'll probably get a C&D order. ;) "
yesterday

Developer
Rob_Lefebvre commented on Chris Anderson's blog post Time: "Here's why so many drone pilots are getting in trouble" (they're not RC folks)
"Yep, I've been saying this for years already."
Monday
Todd Urban replied to Rob_Lefebvre's discussion Helicopter Vibration Levels
"Thanks didnt remember the name of it"
Saturday
David Boulanger replied to Rob_Lefebvre's discussion Helicopter Vibration Levels
"Todd,  I believe the parameter is AHRS_Orientation.  It should be in the Arducopter instructions.  You enter a number in the parameter that corresponds to how you FC is mounted. Regards, David R. Boulanger"
Saturday
Todd Urban replied to Rob_Lefebvre's discussion Helicopter Vibration Levels
"Just an update I swapped out my zeal with the 5mm foam tape vibration is now below 2 now its still a lot sharper than yours im going to try and put it on the side like you did it seems like a much better surface to mount to what do you set to tell…"
Saturday
Jiro Hattori commented on Rob_Lefebvre's blog post Helicopter Presents Attractive Alternative to Multi-rotors and Fixed-wing UAVs
""Japan ArduCopter Group" member Nobuyuki made very compact trad heli. This great compact heli with HKPilot Mega mini. http://diydrones.com/group/japan-arducopter-group/forum/topics/apm-3 Here is building blog. All Japanes written but many…"
Friday

Developer
Rob_Lefebvre commented on Bart Theys's blog post Design of a multi-rotor VTOL UAV and docking station for automated aerial transport
"Bart, probably realistic.  I have a few ideas I'm working on to improve the efficiency.  But I don't put a lot of importance on FM myself.  It's just one small aspect of UAV design.  "
Jul 18

Developer
Rob_Lefebvre commented on Bart Theys's blog post Design of a multi-rotor VTOL UAV and docking station for automated aerial transport
"He didn't state they were more efficient than multi-rotor propellers of the same diameter.  They're not.  What he said was, the system efficiency can be higher because it so easy to get such a large diameter. That's the…"
Jul 18

Developer
Rob_Lefebvre commented on Bart Theys's blog post Design of a multi-rotor VTOL UAV and docking station for automated aerial transport
"Redemptioner, I'm not really sure why you decided to pick this fight here.  But you're losing again.  You should just delete you comments like you did last time. I guess you missed the part where the OP requested to compare the…"
Jul 17

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

Helicopter Presents Attractive Alternative to Multi-rotors and Fixed-wing UAVs

Posted on February 3, 2014 at 1:10pm 326 Comments

I've been working on a new helicopter platform the last few months. Based on an MSH Protos heli which I chose because it's an extremely light weight platform, weighing in at only ~1200g without battery. It has a full belt drive which I much…

Continue

Merry Christmas and a Happy New ACRO!

Posted on December 24, 2013 at 7:01pm 16 Comments

3.1 was released just in time for the holidays, but I felt the new Acro Mode we have developed has not been adequately demonstrated.  So I shot this video to show that Arducopter now has a competent Acro mode to go along with all the other functions.  This is kind of a big deal to me, as I am interested in learning acrobatic flying, but I really appreciate having…

Continue

Group Attempts Prison Contraband Deliver with Hexacopter

Posted on November 27, 2013 at 4:15am 7 Comments

I think this is actually the second attempt at this.  Wasn't there one last year?  Good to see that they actually caught the people involved and arrested them.  Hopefully it won't result in a knee-jerk reaction, but I doubt it.  The article is horribly written, but at least they didn't call it a "drone".…

Continue

Extreme Arducoptering

Posted on November 3, 2013 at 6:30am 6 Comments

 

On Friday we experienced very high winds, 60-90km/h, or Beaufort 7-8, this caused damage in the area, actually knocking over some trees, etc.  I decided to go out and test the wind performance of my F450 quadcopter, see if it's even possible to fly a quad in such conditions, and test the inertial Loiter performance.

 

Overall, it went fairly well.  Flight…

Continue

Comment Wall (9 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!

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