Hi all -
Took my newly-completed quad outside today for it's first outdoor hover testing.. It's been working perfectly indoors (tethered) for tuning and setup.
Everything started out fine, GPS lock, telemetry ok, armed successfully in stabilize mode. Immediately after arming, it climbed about a foot off the ground, slid about 8 feet an crashed (broke 3 props, no major damage). Radio was unresponsive. I never moved the throttle stick.
The "cause" of this event is evident in the logs - snapshot graph of input RC channels attached at th bottom of this post.
I brought the quad back into the shop immediately and observed similar behavior on the radio calibration tool in MP. (erratic readings only somewhat related to stick positions).
Tested my Tx on another model (Blade mQX), no problems.
Haven't been able to reproduce this since then, and it never happened before in all of the tuning I've been doing over the course of the last 3-4 weeks.
Could this be anything except a bad Rx? Here's my setup:
Frame: DJI FW 450
motors, ESCs; telemetry: 3DR
APM 2.5, 3DR power module
Props: APC 10x4.7
Rx: HK OrangeRx (DSM2)
Connections are all tight. The short cable between Rx and APM are anchored with a spot of hot glue.
Possible mitigating factor: It was cold outsie, about 18F.
The easy culprit is the cheap Rx, but it's never given me problems before. Looking for other theories before I replace the Rx.