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Lapua Bullets Drag Coefficient Data

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Lapua Bullets Drag Coefficient Data QTU Lapua Edition ® Lapua Bullets Drag Coefficient Data Now downloadable from Lapua website! QuickTARGET Unlimited® Lapua Edition QTU Lapua Edition is a sophisticated exterior ballistic Basically, as starting values you will need only bullet software that can utilize extremely accurate Doppler type and muzzle velocity. Software will calculate e.g. radar measurements of bullet trajectories. These bullet drop, velocity and energy as a function of distance continuous air drag coefficients make it possible to and the flying time. You can calculate also wind drift calculate the trajectory of your bullet much more and the program has many features useful for adjusting accurately than using the simplified one-number B.C. your scope. All fine features of the software can be Now Lapua is first to offer this radar-data and these found in the manual downloadable from Lapua website advanced ballistic calculations for civilian long-range (downloads section). shooters. Software is available free from www.lapua. com website under “Lapua ballistic site”. QTU Lapua Edition 2010 new.indd 1 10.12.2009 14:00:15 Quick Target Unlimited® Lapua Edition Typically used simple ballistic coefficients (common B.C. G1 or rarely used B.C. G7) describe only ballistic performance of the bullet compared to a standard bullet G1 or G7. Ballistic Coefficient is essentially a measure of drag force compared to G1 or G7 standard projectile. The higher the B.C. value, the less drag and better ballistic performance. The B.C. changes during a projectile‘s flight and stated B.C.’s are always averages for particular velocity ranges. Knowing how a B.C. was established is almost as important as knowing the stated B.C. value itself. For the precise establishment of bullet trajectory, Doppler radar-measurements are required. The normal shooter however, has no access to such expensive professional measurement devices. Doppler radars are used by governments, professional ballisticians, defense forces and a few ammunition manufacturers to obtain exact real world data on the flight behavior of projectiles of interest. The useful result for shooter is bullet Drag Coefficient (CD). CD factor describes the aerodynamic drag at particular point of trajectory. CD table shows this factor as a function of velocity (Mach number). Special software is required (e.g. Quick Target Unlimited) to utilize this data to ballistic table. CD factor does not include the material mass on contrary to B.C. but this is included by software. Calculating from CD table the Dionsequi tet, suscipsusto od tat. Del ex er sequat wind drift can be estimated more accurately. During the Doppler radar measurements the complete location information versus time is recorded. Therefore this method consideres bullet drop during flight and enables the feedback coupling of calculated data and reality. Lapua is offering today this most scientific and accurate data for serious long range Target Shooting. .338 Lapua GB528 Scenar 19.44g (300gr) Drag Coefficient Trajectory versus Line of Sight (Cd) (cm) 0,360 2000,000 1000,000 Trajectory vs. Line of Sight 0,320 0,000 0 400 800 1200 1600 2000 -1000,000 0,280 -2000,000 -3000,000 0,240 -4000,000 Side DeflectionRange (Wind+Coriolis) (m) (cm) -500,000 0,200 -400,000 Drag Coefficient Side Deflection (Wind+Coriolis) 0,160 -300,000 -200,000 0,120 -100,000 0 400 800 1200 1600 2000 0,000 0,080 100,000 DownrangeRange Velocity (m) (m/s) 0,040 1000,000 900,000 800,000 0,000 700,000 012345600,000 Mach Number (n) 500,000 Downrange Velocity 400,000 300,000 CD vs MACH data is the basis for accurate trajectory calculation 200,000 100,000 0,000 0 400 800 1200 1600 2000 NOTE! Basic Quick Target software can not utilize this multiple ballistic data Range (m) QTU Lapua Edition is a special version of normal QTU that is tailored for Lapua bullets. The full version of QuickLoad (QL) and QuickTarget (QT) programs (QL+QT+QTU) can be purchased from dealers listed here?. QuickLOAD© and QuickTarget© are Copyright 1988-2009 of H.G.Broemel, Neubruecker Weg 15, D-64382 Babenhausen, Germany Lapua/QTUUS/1209/500 Nammo Lapua Oy Your retailer PO. Box 5 FI-62101 Lapua, Finland Tel. +358 6 431 0111 Fax +358 6 431 0244 [email protected] www.lapua.com Part of Group QTU Lapua Edition 2010 new.indd 2 10.12.2009 14:00:16.
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