Holger S
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  • Wittenberg
  • Germany
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Holger S's Discussions

Climb/descent speed limit in AUTO mode

Started this discussion. Last reply by Holger S Aug 21, 2013. 1 Reply

Just tried an high-altitude mission, controlled by two waypoints in AUTO mode. Surprisingly, the copter did not climb as configured by WPNAV_SPEED_UP/DN. (set to 1000 each).Instead, the logs show a…Continue

Falling out of the sky during loiter

Started this discussion. Last reply by Para Aug 7, 2013. 11 Replies

Just did some flight testing in windy weather. After some THR_ACCEL tuning, the copter is quite stable, even under these conditions. Finally tried a loiter in 75m AGL. Wind speed seems to be arround…Continue

Stream rate limits

Started this discussion. Last reply by Holger S Dec 14, 2012. 2 Replies

Due to some regulatory issues I am trying to reduce some telemetry stream data rates using the SR3_* parameters. I would even like to disable some steams completely. Unfortunately, there must be some…Continue

APM 2.5 dead on arrival?

Started this discussion. Last reply by Feliks Borzyszkowski Feb 12, 2013. 9 Replies

Hi,in summer I was running an APM 2.5 quite successfully. Unfortunately one day I hit the ground with 100 mph, and the only surviving part was the damn motor :-|I just bought a new APM, but it seems…Continue

 

Holger S's Page

Latest Activity

Holger S commented on Enterprise Drone Solutions's blog post Enterprise Drone Solutions announces Théa: the world’s first UAS to meet the high standards for an ​FAA Airworthiness Certificate
"The 99.9999999% are really hard to believe - especially when considering the X8 layout. I have learned from several crashes that the X8 layout does not provide a lot of an reliability advantage over the usual quad, if any. One example: one of…"
Jul 28, 2016
Holger S commented on Chris Anderson's blog post AP-Manager switches between two Pixhawks for safety, redunancy
"@Tom: I do not aggree - the single point of is very easy to avoid: simply move the switching logic into the ESCs. Some problems might persist (which FC is right?), but at least you have 6..8 redundant switches and a redundant wiring. BTW, given that…"
Jun 24, 2016
Holger S commented on Chris Anderson's blog post AP-Manager switches between two Pixhawks for safety, redunancy
"As far as I understand the device, the AP Manager itself is can be considered as a single point of failure. It adds another PCB, plus lots of additional cables, all of them can fail. So where is the improvement in redundancy or reliability?"
Jun 22, 2016
Holger S commented on Chris Anderson's blog post Sony/3DR announce new Enterprise camera for Solo
"NAB show seems to be over - any news/details/facts on the UMC-R10C so far?"
Apr 26, 2016
Holger S commented on Zubax Robotics's blog post Zubax GNSS 2 - high-end positioning module for UAV and robotics
"I have flown the v2 module with ArduCopter (master) an can confirm that the new module is working nicely and performs very well. It is almost plug-and-play with APM: after setting the params BRD_CAN_ENABLE to 2 and GPS_TYPE to 9, it is auto-detected…"
Mar 24, 2016
Holger S commented on ArcticParachute's blog post Ejection parachute system
"Very interesting system. What is the exact weight of the 4kg system (all nuts, bolts, cables included)?"
Jan 11, 2016
Holger S replied to Randy's discussion Copter reliability vs functionality
"When losing one motor on the X8, shouldn't it be enough to throttle down exactly one opposite motor? That means we have lost 2/8 (25%) of power, not 50%. But probably we need the ESC feedback here to find out what motor has failed. Overpowering…"
Jun 3, 2015
Holger S replied to Randy's discussion Copter reliability vs functionality
"After some years of experience with ArduCopter, I would characterize the reliability aspect of ArduCopter as good, while the functionality aspect is outstanding (IMHO). When looking at my past crashes caused by ArduPilot (about 10 or…"
Jun 2, 2015
Holger S commented on Sam Tabor's blog post Mavlink data displayed on Taranis, without converter
"Hi Sam, amazing work! Have you ever tried to commit your work to the upstream OpenTX project? That way your changes would be maintained by the upstream project and your changes would "stay alive" in newer revisions of OpenTX without having…"
Mar 5, 2015
Holger S commented on Trent at MyGeekShow's blog post NCR18650B - The Future of RC Aircraft Batteries?
"I use cells without tabs and solder apropiate copper wire directly onto the poles. The 18650 cells are very easy to solder as log as you do not bring to much heat into the cell. To prevent that, I use the following technique: 1. use a large…"
Jul 28, 2014
Holger S commented on Trent at MyGeekShow's blog post NCR18650B - The Future of RC Aircraft Batteries?
"Hi Peter,  unfortunately these batteries are not really suitable as drop-in replacement for existing copters. In your case, I guess you will heavily overload these cells, as 25mins are more than the allowed absolute max of 2C. Keep in mind: the…"
Jul 25, 2014
Holger S commented on Justin Martin's group Li-Ion, Experience, Design, and Theory.
"Hi Justin, inspired by your post I just browsed some old logs. I found two logs of flights at approximately 1C. All measurements were taken with calibrated SM Unilog current/voltage sensors. Both flights were in Februrary at 14°C, and 16°C…"
Mar 11, 2014
Holger S commented on Trent at MyGeekShow's blog post NCR18650B - The Future of RC Aircraft Batteries?
"I use these batteries with good success in my FPV quad (5s3p, RCTimer 5010, 16x5.5 props). Flight time is about 40 min (down to 3.0V, plus some reserve), maximum current at full throttle is about 4C/35A. During normal flying the power goes rarely…"
Mar 11, 2014
Holger S replied to John Kleiber's discussion Can compassmot be accomplished without flipping and rotating the props?
"I usally just exchange two leads on each ESC. The props run backwards in this case, pushing the copter down like turning the props. But there is a major catch: it only works with the current sensor: the throttle to current response of a prop running…"
Sep 25, 2013
Holger S replied to Holger S's discussion Climb/descent speed limit in AUTO mode
"Any ideas? Is there anybody who has experienced the same limits or climb/descend rates larger than 5.45m/s?"
Aug 21, 2013
Holger S replied to Ian's discussion PX4 + Mission Planner Initial Setup - Can't connect!
"The same here - but for me the powered hub solves the problem. Maybe there is some problem with power usage declaration in the USB device descriptor?"
Aug 20, 2013

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