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Very good info RTRyder... The FCC ID part 15 ID is a good thing to have even outside US territory. With respect to regulations... only by means of international agreements does one country's regulations such as US based FCC get adopted or have influence beyond territorial boundaries such as the...

The course can be as short as 2 to 3 weeks (2 night per week in your local area). GPS rocket beacon is: http://www.bigredbee.com/BeeLineGPS.htm (70 cm is in the 400 Mhz HAM radio frequency band) My handheld HAM radio c/w GPS tracking via APRS: see attached photo.... Here is what one of my high...

See photo below...... HAM Handheld used to gather the rocket nosecone beacon GPS location. Also here is where I took my course.... thought it would take 2 or 3 days..... try 2 to 3 months!!! http://www.hamradiolicenseexam.com/

"Firmware 2.0 makes the background "mush" again"..... seems to suggest that the firmware is moving the image sensor to a new focal plane!!! but that seems so unlikely.

I only had that issue once.... And I don't recall ever powering the GoPro off and on again to ensure the vidoe was saved properly. But I always stop the video recording once the MR has landed then restart before flying again. I discussed the issue with GoPro tech support and they indicated that...

The original IMUs were developed by NASA with programming help from Dr. Kalman back in the mid sixties. It was first used to guide finless rockets then later to balance the LEM that landed on the moon and returned. In the case of the Saturn V, the center of gravity of the rocket is a great...

Suspend your MR from any side with your finger and see which way it tilts. Then set it down and tie a very strong cord to a position near where your finger was previously located. Adjust it back and forth until the MR hangs from one side of the hub in a completely vertical attitude. Mark that...

fyi - http://epoch-archive.com/a1/en/ca/yow/2014/04-Apr/11/A1.pdf

You don't need to balance the MR's center of gravity at the center of the MR hub on the vertical, i.e., z access, only on the horizontal x/y axis. But, if I remember correctly, the FC still needs to know the vertical C of G position relative to the FC vertical position..... then also there is...

You will get more air time if you reduce the airflow restriction under the motors.....

I never pushed my little GoPro camera away from setpoint to see how it responds but no issues in flight. I am not familiar with the other equipment you listed. But above is good info that should help others to answer better....

IMHO - Stepping outside of the intended BGC design for specific camera can quickly lead to a host of configuration and calibration challenges and a lot of bogus product returns. The better designed BGCs have in addition to PID loop control for each axis, a torque or deadband adjustment...

Radar interference?

A bit more background information would be helpful such as.... 1) Are you simply changing the attitude of the MR gimbal housing to cause this or are you pushing the camera away from the setpoint to see how it returns to the setpoint? 2) How many and which other BGCs have you worked with? 3) What...

Microvibrations appear as a small ripple in the BGC control-monitoring software trending screens. These are caused be an incorrectly configured torque parameter in most BGCs such as the Martinez and I believe also the AlexMos BGCs. This is not a PID loop tuning issue....... As an example the...

Comments? http://www.foxtechfpv.com/propeller-quick-detach-cwccw-p-1303.html

I am now convinced that it is the motor that beeps when first powering up a Multirotor..... and not the ESC.... So where is the beeping device hidden inside of the motor? Or are my ears misleading me?

Motor arms are very stiff indeed. No related vibration issues. But keep the IMU mounted below the Hub on an anti-vibe plate as the prop wash tends to mess up the baro sensor otherwise in forward flight. Also keep in mind the the motor arm height at the hub is slightly less than the F550 arms...

"It will take time to build that inventory." I faced similar dilemmas with top-of-the-line ASUS Notebook computers a few years back with respect to warranty replacement batteries. Despite some initial fear and trepidation regarding online shopping thru Singapore and Hong Kong I now buy direct...

You can always do the POI function without the Multirotor like this..... or not!!!! https://www.youtube.com/watch?v=Bg1tICmpb4w totally weird IMHO!