Diabolo Pellet Aerodynamic Data

[AeroBal]

Does anyone know where I can find any published data on Diabolo pellet aerodynamic coefficients.  Drag data is somewhat common but normal force and pitching moment data are hard to find, and pitch damping, roll damping, and Magnus moment are non-existant.

I found a BRL (USA) report of a spark range test of an Eley-Tennex .22LR projectile, which investigation was funded by the US Olympic Committee.  However, this not really applicable to the Diabolo pellet.

I can't beleive that the major producers, after decades of sales, have not run at least some simple wind tunnel tests to measure basic static stability data.  I came across a recent paper by Ladommatos (Master's Thesis) describing a test to measure drag of four basic pellet shapes, but it was limited to axial drag only.  With literrally hundreds of university low-speed, subsonic tunnels existing around the globe, I would think this could be done fairly inexpensively for a large corporation.  Perhaps they have, but hold the data close to the vest.

Any suggested links will be greatly appreciated.  Thanks.

[ezman604]

Welcome to GTA Forums Tom!!!

SAFE & Happy Shooting!!!!
Dave

[7624452]

[dk1677]

Welcome to the GTA Tom!

[mr007s]

HOWDY, WELCOME, HAVE FUN, AND  "Follow the Yellow Brick Road”

[AThomas]

Welcome to the GTA!

[splitbeing]

I'd try google searching "gatewaytoairguns.org diabolo pellet coefficient" and see what comes up.

Perhaps more importantly, look for posts by Bob (rsterne, darth vader cookie Monster) and Matthias.

[amb5500c]

Welcome to the GTA.
Richard