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Spark compass error - flew off full speed
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<blockquote data-quote="BudWalker" data-source="post: 83130" data-attributes="member: 787"><p><strong><strong>3) </strong>Yes it's a good question...when the Spark's internal sensors are showing as unreliable...why wouldn't the Spark revert automatically to ATTI mode, instead of activating a full throttle fly away? </strong></p><p></p><p>Usually the "internal sensors" aren't showing as unreliable. All the FC knows is that Yaw (computed mostly from accelerometer and gyro data) doesn't agree with magYaw (computed just from magnetometer data). The FC can't know which is correct. It used to be that this was enough reason to switch to ATTI. When the Mavic was introduced the strategy became to remain in GPS+ATTI and attempt to reconcile the Yaw/magYaw separation by rotating the AC while holding Yaw constant until magYaw agreed with the constant Yaw value. Sometimes this works, sometimes not. I suspect the Spark does this now and that's why you see fly aways.</p></blockquote><p></p>
[QUOTE="BudWalker, post: 83130, member: 787"] [B][B]3) [/B]Yes it's a good question...when the Spark's internal sensors are showing as unreliable...why wouldn't the Spark revert automatically to ATTI mode, instead of activating a full throttle fly away? [/B] Usually the "internal sensors" aren't showing as unreliable. All the FC knows is that Yaw (computed mostly from accelerometer and gyro data) doesn't agree with magYaw (computed just from magnetometer data). The FC can't know which is correct. It used to be that this was enough reason to switch to ATTI. When the Mavic was introduced the strategy became to remain in GPS+ATTI and attempt to reconcile the Yaw/magYaw separation by rotating the AC while holding Yaw constant until magYaw agreed with the constant Yaw value. Sometimes this works, sometimes not. I suspect the Spark does this now and that's why you see fly aways. [/QUOTE]
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Spark compass error - flew off full speed