Measurement method for in-flight yaw of C77 round


  1. Bernier, A.
  2. Rémillard, V.
Corporate Authors
Defence R&D Canada - Valcartier, Valcartier QUE (CAN);General Dynamics Canada Ltd, Le Gardeur QC (CAN)
Two different methods using a Nikon and a Sensicam camera were investigated to measure the yaw of the 5.56 mm C77 cartridge at approximately 5 m from the gun muzzle when fired from an accuracy barrel and a C7A2 rifle program. The Sensicam camera was selected as the best possible method because no investment was necessary and the quality of the image of the projectile and the line of fire of the witness grid sheet was better defined with this camera. A table that supports both cameras was fabricated in order to measure the in-flight yaw of the projectile in the horizontal and the vertical plane at 90° apart. The yaw was measured from an accuracy barrel and a C7A2 rifle mounted on a fixed stand. The results have shown that the in-flight yaw of the projectile when fired from the weapon was almost doubled compared to the one originating from the accuracy barrel.

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Report Number
DRDC-VALCARTIER-CR-2009-321 — Contractor Report (Final Report)
Date of publication
01 Oct 2009
Number of Pages
Electronic Document(PDF)

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