Is the report's warning on Compass misleading?
I click on Auto Analysis in Mission Planner (MP).
In the report, look at the last line shown.
Compass = FAIL
Having no real documentation to help me understand this FAIL, I tried for years to get my ships to
Read more…Katie "Ket" DeSpain and Forrest Frantz teamed up to take back the flight duration world record. A Romanian group beat the previous record held by Forrest with an excellent timed flight of 2hr 7min. But, they didn't disclose how they did it. That pro
Read more…Why a maximum value of 550? I understand intuitively why there would be a minimum value.
We typically see less than 6% mag field interference, but always get nailed by the max mag field length. Values are typically 680 to 790.
The integrated compass/ma
Read more…I was so pleased to find your group.
I use a Taranis radio, which can use Japan communication frequencies for telemetry and ship control. But what do smart RC fliers in Japan use for:
- Radio Control (Taranis? Which one? Link?)
- UAV RC Receiver for t
Read more…Well ... at least until the next discovery.
(sorry about the delay on this post ... the site was down for quite a while)
Definitions.
- FCU is the Flight Control Unit (e.g., Pixhawk or APM).
- VDEP is the Vibration Dampened Electronics
Read more…The original Wire Sizing worksheet was for ships with a short life span (world record setters, FPV racers, prototypes, etc). Now the worksheets has been updated to also account for Ampacity.
Ampacity takes into account the long-term life of the wire a
Read more…This is how you modify Ardurino code for custom irregular shaped ships. There is no need to modify code for a ship with a frame that is laid out like a:
- coaxial triangle
- square or rectangle
- regular hexagon
- regular octagon
Sometimes even if the sha
Read more…Thought I'd better share this as i've never seen anything come close in performance.
This is an FPV 250 in hover! On the left chart -- Less than 0.2g is good, 0.8 to 1.2 is excellent, but an average score of 0.01 is just nuts! I've seen numbers as lo
Read more…For the FPV and multicopter industry to accelerate it's annual leaps in technology, it is my belief that it needs standardized test procedures so that:
- a manufacturer/inventor knows
... before product launch how their product compares (saving money
Read more…That's a bold statement ... Worlds Best. But it's even larger than that. Not just Worlds Best, but best for most all applications less than 30 Amps (limit of the tests). That means:
- duration ships that only pull 2 to 8 amps per rotor
- most all 6S an
Read more…Carbon Skin/Nomex Core sandwich panels are one of the world’s best strength to weigh materials. And it’s affordable. However,
- the edges of sandwich panels can be easily damaged.
- the panel itself is not good at handling point loads.
- the skin can pe
Read more…An update of the latest tests.The winners are 2 of the 3-blade props tested. If you want more speed, then choose the one with the highest top end. Response? Then chose the 6x4-3 Gemfan.
Thrust is in terms of excess thrust after lifting itself at 14.8
Read more…Results of testing 15 props for 250 size quad racers.
Background--A 250mm diagonal quad racer is becoming the emerging standard for FPV racing.
Requirements--The requirements for a quad racer are:
- speed
- acceleration
- (not efficiency as time mar
Read more…Is there a mathematical solution for preventing fly-aways?
My understanding is that the following is what causes them:
- Accel z goes negative due to ship vibration versus an actual drop in altitude
- The ship corrects by adding power
- The added power c
If interested, here are the details of how to build a high-performance and light weight gimbal for the GoPro.
http://diydrones.com/forum/topics/building-a-3-axis-gimbal-for-gopro
Even though the build is a 3-axis gimbal, for the GoPro I actually recomm
Read more…The following steps were taken to build a light-weight responsive 3-axis gimbal for the GoPro. I'll cover:
I Requirements
II Design
III Build
IV Test
V Performance
Background: The next duration ship needed to be a video and camera platform. The
Read more…To test gimbal motors at various loads (camera+gimbal+motors), a test speed and angle is needed. My assumption is that ships in controlled flight do not correct more than 3 degrees in 0.2 seconds (or a +3 followed by a -3 degree rotation in 0.4 seco
Read more…This is a graphic representation of MP accel data.
Shouldn't IMU and IMU2 data be correlated? When IMU and IMU2 data are analyzed, the results are a negative and week correlations between IMU and IMU2. If two chips sense data at different rates, the
Read more…The purpose of this posting will be to document the building of a video capable low vibration quad with FPV/OSD that flies for 1.5 hours.
- flight path range > 15 km (2km radius)
- max speed > 30 kph (capable of handling moderate winds)
- GoPro camera/v
Read more…Many claim to have camera isolators that really work. But I've never seen data or evidence that is measurable. Help!
My brother Jim and I put this together, which I just tested on Rufous, the 1 1/2 hour + duration copter. We are trying to build a go
Read more…