Preview/overview: FY21AP FPV stability system, OSD and return-to-launch

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This video is a preview and overview of a clever little product out of China, the FY21AP "Flight Stability System", onscreen display and return to launch controller.
I'll be fitting this device to the HK EPP FPV RC plane and testing it out.
If you're serious about FPV (and it works as advertised) this product could be a really useful addition to the standard camera and video-link you already use.
The next video, showing the installation and test flights with the FY21AP installed should be online very soon -- don't miss them.
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