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Old Dec 15, 2012, 01:48 AM
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Syma X1 returns

Syma X1 autopilot (1 min 13 sec)



Finally got sound from the Canon T4I. It's not always in focus, but it's a real narrow depth of field & real expensive lens.

Many years ago, the feedback algorithm went to a fixed integral step for all error. Today, it went back to a variable integral step & got a lot more stable. The Syma X1 is the most unstable vehicle in the indoor fleet. It usually can't take off successfully.

Also, the award winning follower amplifier
http://www.rcgroups.com/forums/showthread.php?t=1778814
failed. It appeared to have a resonant oscillation when plugged into the Syma remote control. It oscillated at 40khz. The Syma may have drawn current at just the right frequency to resonate with the slow op-amp. So it's back to no follower amplifier & it works perfectly. There's a risk of any active component creating an oscillation.

The T4I took some comparison photos with the 5D. The 5D's only use now is the larger frame.
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