Luc Maximilien
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Luc Maximilien's Discussions

After 19 minutes in Loiter ,150° Yaw rotation and went gently down vvithout responding to radio sticks

Started this discussion. Last reply by Luc Maximilien Aug 30, 2016. 9 Replies

Pixhawk last revision with 3.3.3 firmware.It is not the first time it happens, but previously I suspect bad compass , Gps gliches, solar storms .Today I check everything twice and all was going…Continue

Heavy drone crash during Ski World Cup

Started this discussion. Last reply by Andre K. Dec 23, 2015. 1 Reply

Italy already…Continue

Tags: campiglio, madonna, slalom

Circle mode not working as it should

Started this discussion. Last reply by BaNe Machine Sep 23, 2014. 2 Replies

I'm using version 3.13  with an Hexa ,Even if I change the value of circle_radius  from 20 to 30 the copter circle perfectly but only with a radius around 10 meters .Also the circle_rate  with values…Continue

Tags: rate, radius, circle

Only two output pins with PWM for the gimball ?

Started this discussion. Last reply by Luc Maximilien May 7, 2014. 1 Reply

I have recently bought a APM 2.6 , I use a custom build brushless gimball for Sony cx730 and only pins A10 and A11 have a PWM output while I need another one for the zoom function of the Sony.I have…Continue

 

Luc Maximilien's Page

Latest Activity

Luc Maximilien replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"About T-Motors and other hardware companies I would like to underline that they  often lie about the performances of their products , I had  a long discussion with T-Motor because of 20% less performance than their data sheets even with…"
1 hour ago
Luc Maximilien commented on Chris Anderson's group Agricultural UAVs
"You should say that the NCR20700A cell at 20A has his capacity down to 2800mAh and the rated 3300mAh capacity is only for 0.5A load. These cells are not for heavy UAV but for ultra efficient UAV, it is a different thing."
4 hours ago
Luc Maximilien replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"I do not have the same experience with the quite efficient  hexas (11,5 gr/watt ) with 16" props I usually build for my customers. I notice that in no wind conditions the energy used to move at 5 m/s was only 5-7% more that the energy used…"
yesterday
Luc Maximilien replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"I totally agree with Gary. The funny thing about Aeva is that if I have well understand it is Open Source Look at page 13 of this presentation (with no technical datas but a lot of slides and talk ):…"
Thursday
Luc Maximilien replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"@ John C Hansen I did not found anywhere the specs of the Aeva . All I found was 60 minutes of fly time and 4,2 Kg AUW , somewhere else I read about 5kg of payload but I doubt that without 28" propellers it can be possible. Just tell me how…"
Thursday
Luc Maximilien replied to Brad Hughey's discussion The Case for Large-Scale Electric Multicopters
"I build multirotors since several years now for professional purposes , I do not believe at all that the Olaeris Aeva is a usefull design.What is safer in a propeller with something around ?Are the  airplanes  propellers  shrouded…"
Wednesday
Luc Maximilien commented on Chris Anderson's group Agricultural UAVs
"Cristian , I have work with Li-on batteries and I do not completely agree to what you wrote about. - These are not "real" 6S packs since the maximum tension of Li-on battery is not the same of Lipo batteries, look at the graph belòw…"
Apr 15
Sriram replied to Luc Maximilien's discussion Do-Set-Cam-Trigg-Dist wrong distance between photos in the group Terrain/Surface Mapping
"can you upload the log file..."
Feb 10
Luc Maximilien commented on Chris Anderson's blog post New 3DR autopilot: Pixhawk Mini
"@ Ravi , I do nt completely agree with you about impossibility to fight against chinese products. Mikrokopter is an example. They continue to build and sell their products. They are expensive but good quality. The same for other manufacturer of…"
Oct 29, 2016
Luc Maximilien commented on Chris Anderson's blog post New 3DR autopilot: Pixhawk Mini
"Telemetry data on Frsky radio display , IMO, is fundamental .So for me an autopilot without two UARTS like the original Pixhawk or native Frsky telemetry  is useless ."
Oct 28, 2016
Luc Maximilien replied to Kaan Ozgen's discussion Drone with 1 hour flight time
"I do not know if it is a joke but to have 60 minutes flightime with 11' props you need a motor/prop combination with almost 4 times the efficiency of motor/prop actually on the market."
Oct 19, 2016
Luc Maximilien replied to Kaan Ozgen's discussion Drone with 1 hour flight time
"I do not think so because multirotors have some advantage if you consider payload vs size of aircraft . Multirotors are much more easier to pilot because they do not fly they rather translate in the air and they can fly better with wind. When a quad…"
Oct 19, 2016
Luc Maximilien replied to Kaan Ozgen's discussion Drone with 1 hour flight time
"Yes, you can change the gimbal in just 1 minute , or put anything else you want very quickly ."
Oct 18, 2016
Luc Maximilien replied to Kaan Ozgen's discussion Drone with 1 hour flight time
"The hexa I build  fly for 34 minutes with 1100 grams of payload , the quad  (870 grams without battery and payload) with 250 grams of payload fly for 50 minutes ."
Oct 18, 2016
Luc Maximilien replied to Eric Smith's discussion Voltage Drop on Pixhawk Power module under load
"I not had a good experience with the Mauch Ubec and current sensor. The current reading that appears on Mission Planner is not stable , it varies a lot , much more than the standard 3DR current sensor making the current data unuseful .Mauch told me…"
Oct 14, 2016
Luc Maximilien replied to Eric Smith's discussion Voltage Drop on Pixhawk Power module under load
"Current draw should be 21 A  with a good motor so with 10200 mAh 3S you should fly 28 minutes . With 27A and 10200 mAh 3S you should fly 22 minutes. So apparently your batteries are almost dead ."
Oct 10, 2016

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bulid multirotors for aerial videos
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