THE ACCURACY OF DRAG MEASUREMENTS AS A FUNCTION OF NUMBER AND DISTRIBUTION OF TIMING STATIONS
Abstract
General formulae are given for the error to be expected in the drag coefficient of a projectile whose flight is observed over a given range containing timing stations distributed in an arbitrary manner. It is assumed that the time-distance relation can be represented by a cubic polynomial of the form t = a0 + a1z + a2z-squared + a3z-cubed. It is further assumed that the mean errors in time and distance are independent and constant at each observing station. Illustrative examples are included. A proof of optimum distribution of timing stations for drag determination is given.
Document Details
- Document Type
- Technical Report
- Publication Date
- Feb 01, 1948
- Accession Number
- AD0621563
Entities
People
- B. G. Karpov
Organizations
- Ballistic Research Laboratory