Oehler Model 35P
Definition
A dual-screen optical chronograph (plus proof channel) widely used in US forensic and manufacturer testing. Accurate to within 0.2% of reading. The standard instrument for SAAMI test-fire velocity data collection in many US laboratories.
Related terms
- Greenhill Formula
- Alfred Greenhill's 1879 empirical formula for the minimum barrel-twist rate to gyroscopically stabilise a bullet of given length and calibre. Uses a...
- Heydenreich Model
- A parameterised internal-ballistic model incorporating propellant specific force, burn-rate coefficients, and chamber volume. More physically grounded than Le Duc; the conceptual ancestor...
- IBHVG2
- Interior Ballistics of High Velocity Guns version 2; a US Army Research Laboratory code implementing the Lagrange pressure-gradient model for large-calibre and...
- LabRadar
- A Doppler radar chronograph measuring bullet velocity continuously from muzzle to several hundred metres, producing a velocity-distance profile. No physical contact with...
- Le Duc Model
- An empirical algebraic formula (1873) relating muzzle velocity to peak chamber pressure via two calibration constants. Produces velocity estimates within 3-5% of...
- Miller Stability Formula
- A dimensionless stability factor (Sg) formulation published by Donald Miller in 2005, calibrated for modern spitzer bullets. Sg greater than or equal...
- PRODAS
- Projectile / Rocket Design and Analysis System; a US Army Research Laboratory / Arrow Tech Associates lumped-parameter code integrating internal, external, and...
Explained in
- Internal Ballistics: Muzzle Velocity Prediction ModelsA dual-screen optical chronograph (plus proof channel) widely used in US forensic and manufacturer testing. Accurate to within 0.2% of reading. The standard in...