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Number of Satellites

Hi-

I have APM with MTK GTPA010 with v1.6 firmware. Light on GPS is solid blue. APM GPS test shows goot lat and long values. HK GCS show aircraft drifting a few degrees every few seconds......

In HK GCS i show no lock and zero satellites. I see in the

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Rotors flew off

First off I want to thank everyone involved in this project, it's just amazing what a stellar job you've done!

 

I just got everything assembled and checked/verified and I was hand-testing to make sure everything is solid. I throttled up close to full

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Altitude hold control loop

1 -  How to mix data from ultrasound range sensor, altimeter (barometric pressure sensor) and GPS to better estimate the altitude of a UAV platform? 

2 - How to use the altitude estimate (from question 1) to create PID control loop for altitude hold  

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cant get xbee's to talk

Hi all-

Im having trouble getting my wireless xbee's to talk.

i have 2 each XBEE09P's mounted to diydrones boards.

I have ArduPilot Mega board v1.4 with Ardupilot Mega 1.0 level software

I setup both xbee units with X-CTU to talk at 57600 baud

When powere

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Motor Speed Problem

So I have the board up and running and the configurator returning good values. The transmitter also appears to be sending a good signal. The problem is that whenever I turn the throttle up on all 4 motors, 2 will always lose power very slowly. This i

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Lost radio control ... impact on ardu

If for some reason radio transmission is disrupted and never re-established, what is the impact on the arducopter (arducopter not in GPS nor Altitude hold running either on arducopterNG or the ardupiratesNG code) ... I mean will the copter drops from

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All About Motors

One of the things that we fight in electric flight is the efficiency of the electric motor. Even the good off the shelf stuff is frequently not at its best as a trade off in manufacturing cost and longevity of a product. This fellow at fly electric w

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