What’s the easiest, cheapest and still reasonably reliable way to measure the speed of a toy quadcopter or hexacopter? Let’s evaluate a decidedly lo-fi approach in this one-off departure from the regular RCview programming!

Sounds used:
"Doppler siren""
https://www.freesound.org/people/jobr...

"Woosh Sound"
http://soundbible.com/2068-Woosh.html

Videos shown:
"How to Get Speed and Altitude for a Drone with No Telemetry"
   • How to Get Speed and Altitude for a D...  

"SpeedClock"
   • SpeedClock  

"Speed Gun v1.4 (Smart Tools)"
   • Video  

"#38: Analyze Hot Wheel Radar gun with a Real Time Spectrum Analyzer"
   • #38: Analyze Hot Wheel Radar gun with...  

"Aerial Drone Radar Gun"
   • Aerial Drone Radar Gun