Ulkoballistiikan uusi aika - Tutkadata Lapuan luodeille

MSa · tammikuu 20, 2009, 01:55

Lapua on julkaissut lähes kaikille luodeilleen ns. tutkadatan. "Tutkadata" tarkoittaa luotikohtaista ilmanvastuskerrointa (Cd) nopeuden mukaan.

Luodin Cd-tietoa on mahdollista käyttää mm. Quick Target Unlimited ballistiikkaohjelmistossa ja se mahdollistaa erittäin tarkan luodin lentoradan laskemisen. Tätä tutkadataa testattiin Quick Target Unlimitedilla laskien Niinisalossa 2008 ja sen todettiin antavan erittäin tarkkoja lentorata-arvoja esim 338LM:llä jopa 2000m saakka. Cd-tiedot on saatavilla 28 Lapuan luotiin.

Näkemykseni mukaan ulkoballistiikan laskeminen siirtyy tämän myötä aivan uudelle aikakaudelle.

Esite: http://www.lapua.com/uploads/media/LapuaBulletsDragCoefficient.pdf">http://www.lapua.com/uploads/media/Lapu ... icient.pdf">http://www.lapua.com/uploads/media/LapuaBulletsDragCoefficient.pdf

Cd-tiedot: http://www.lapua.com/uploads/media/LapuaBulletsCD-Data.zip">http://www.lapua.com/uploads/media/Lapu ... D-Data.zip">http://www.lapua.com/uploads/media/LapuaBulletsCD-Data.zip

MSa

~~Lainaa~~Lapua Bullets Drag Coefficient Data

for QuickTARGET Unlimited®

Real and accurate ballistic data for different velocities now available for most

Lapua bullets. CD-data measured by continuous doppler radar measurements. Data will

be available at Lapua website and Quick Target Unlimited ballistic software. With this

data you can calculate the trajectory of your bullet much more accurately than using the

simplified one-number B.C.

Typically used simple ballistic coefficient (B.C.) describes

only ballistic performance of the bullet compared to old standard

bullet "G1". Ballistic Coefficient is essentially a measure of drag

force compared to G1 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 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.

NOTE! Basic Quick Target software can not utilize this multiple ballistic data

TARKKA-AMPUJAKILTA

Ulkoballistiikan uusi aika - Tutkadata Lapuan luodeille

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