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Re: [Phys-L] Video Analysis of Album Cover Flight and Glider Stall

I looked at the trajectory, and didn't see the expected recovery from the dive as air speed rises which could lead to a repeated stall.  It seems that this could be the flight profile of an air vehicle with a C of G well behind its center of lift so that it cannot regain airspeed or an aircraft that stalls into an un-recovered spin. This DID remind me of the path of a boomerang, which slowly climbs while circling out of the wind, followed by a steep slow descent near the start point, so that people who throw them can often catch them between clasped hands.

Brian W

On 2/6/2020 10:22 AM, Steinert, Jeff wrote:
This is likely a question for JD, but all responses are appreciated:

My students are using video analysis in Logger Pro to explain the flight of
a projectile of their own choosing. One has flown an album cover and
produced a rather complicated trajectory that can be viewed here:

I searched the net for a graphical depiction of the trajectory for a
stalling glider with no luck and I'd like to give my student a place to
start in her search for an explanation using the forces acting on her album
cover. Does the above plot resemble what you'd expect to see for a stalling
glider? Something else?


Jeffrey J. Steinert
Physics Instructor
11th Grade Team Leader
Science Department Co-Chair
NHS Adviser

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