Product Description

The Kestrel 4500NV Pocket Weather Tracker with integrated HORUS® Atrag™ ballistics software calculates precise aiming solutions based on real-time atmospheric conditions, user specific ballistics and multiple target data.

When shooting long range, even the lightest of breezes will affect the bullet, no matter what speed or ballistic coefficient it has. Also, any change in geographical location (determining coriolis and spin drift) or altitude, atmospheric pressure, temperature and humidity will impact the firing solution required to hit the target. In a robust, pocket sized instrument the Kestrel provides instant and accurate measurement of wind speed and direction with all other critical environmental parameters that affect a bullet’s trajectory. The integrated HORUS software automatically updates the firing solution based on this real-time weather data. Each user inputs their own ammunition’s ballistic variables and velocity along with the rifle’s data (bore-sightline height, twist rate and direction along with zero range etc.) into the Kestrel 4500NV HORUS. These gun and bullet settings may be saved to a library for future quick reference.

Target Screen

Once the ballistic data is entered, the direction of fire (DoF) is programmed using the Target Screen. This is done by pointing the unit at the target from the firing position and pressing `Capture` to log it. This sets the compass bearing of the target so the crosswind effect can be computed.

Main Screen

The Main HORUS Screen displays the critical data for making the shot. When the Kestrel is in full automatic mode, the Horus software will immediately calculate the windage (W) and elevation (E) setting for this specific shot scenario, constantly updating the firing solution as long as the unit remains facing into the wind. If preferred, an average wind speed may be captured or a value manually entered. Up to five targets may be active at any time and it is quick to switch between their respective firing solutions.

Range Card Screen

The Range Card Screen shows detailed information about the ballistic solution at various ranges for the currently selected gun & target. Should a correction be required to the theoretical ballistic data based on observations in the field, a ‘True Drop’ adjustment may be made so that the elevation correction matches what is actually observed to significantly enhance overall accuracy.

Environment Screen

The Kestrel 4500NV HORUS also operates as standard Kestrel 4500 Weather Meter providing readings of wind speed and direction, crosswind, headwind / tailwind, temperature, wind chill, heat index, dew point, relative humidity, barometric pressure, altitude, density altitude, wet bulb temperature, digital compass and time & date.

The Kestrel 4500NV with Horus® Vision software is a unique high end precision shooting tool. It combines critical environmental data from the Kestrel 4500 with an integrated targeting software solution using Horus ATrag advanced proprietary ballistics algorithms.

HORUS MODE:

Gun selection

• Pre-loaded library guns – up to 50 may be stored. The Kestrel is supplied with an initial selection; in the future more may be downloaded to the Kestrel from a PC using new Gun Library Software.
• User-defined guns – up to 9 may be stored
• Default gun – one may be specified
• Gun parameters:

• Gun Name
• Muzzle velocity
• Ballistic coefficient (of the bullet)
• Bullet weight
• Bullet diameter
• Zero range
• Bore Height
• Rifling Twist
• Twist Direction
• Scope Clicks
• True Drop

Target selection

• Up to 5 active targets may be specified for fast switching between
• Target parameters:

• Target range
• Wind direction
• Wind speeds 1 and 2 (high & low for bracketing)
• Direction of fire
• Inclination angle (for shooting above or below the horizontal)
• Target speed
• Target direction of movement

Environmental Parameters

• Auto or manual update mode
• Latitude
• Temperature
• Station Pressure
• Relative Humidity
• Density Altitude
• Coriolis correction on or off

Ballistics solution

Corrections for

• Elevation
• Wind speeds 1 and 2
• Lead
• Vertical and horizontal components of coriolis
• Drift
• Remaining velocity
• Remaining energy
• Time of flight
• Max ordinance
• Bullet drop
• Range at which bullet slows to Transonic Velocity and a subsonic velocity

Range Card Screen:

• Adjustable range increment – 10, 20, 25, 50 or 100 metres (or yards)
• Range values up to 4000 metres (or yards)
• Display of several parameters of the ballistic solution and their values corresponding to each range increment, including corrections for:

• Elevation
• Wind Speeds 1 and 2
• Lead, plus:
• Remaining energy
• Time of flight
• Max ordinance

WEATHER MODE:

• Current wind speed
• Average wind speed
• Maximum wind speed
• Wind direction
• Crosswind
• Headwind/tailwind
• Temperature
• Wind Chill
• Heat index
• Dew Point
• Relative Humidity
• Barometric pressure
• Altitude
• Density altitude
• Wet bulb temperature
• Digital compass
• Time & Date

Choice of measurement units

• kt, m/s, km/h, mph, ft/min, Beaufort
• º, cardinal points
• ºC, ºF
• %
• mbar, inHg, hPa, psi
• m, ft

Accuracy

• Speed ±3% of reading or ±0.1m/s
• Direction ±5º
• Crosswind, headwind, tailwind ±5%
• Temperature ±1ºC
• Relative humidity ±3%
• Dew point ±2ºC
• Barometric pressure ±1.5mbar

Operational Range

• Speed 0.6 to 60 m/s
• Direction 360º
• Crosswind, headwind, tailwind 0.6 to 60 m/s
• Temperature -45 to +125ºC
• Relative humidity 0 to 100%
• Barometric pressure 10 to 1100mbar

Specification Range

• Speed 0.6 to 40 m/s
• Direction 0 to 360º
• Crosswind, headwind, tailwind 3.8 to 40 m/s
• Temperature -29 to +70ºC
• Relative humidity 5 to 95%
• Barometric pressure 750 to 1100mbar

For those with after dark requirements, the Kestrel 4500NV Horus comes with a low intensity red back-light to preserve night vision.

To enable in depth analysis of data at a later time, the Kestrel with Horus ATrag ballistics can be set up to log data automatically or manually. The stored data can also be uploaded to a PC via an additional Kestrel PC interface. With the Bluetooth® model, data may be streamed live via Bluetooth wireless technology.

The Kestrel with Horus ATrag ballistics is compact and weighs only 112g. It is IP67 waterproof and MIL-STD-810F rugged. The Kestrel’s robust design has survived years of use by the military world-wide; their quality is backed up by a 5 year warranty.

The Kestrel with Horus ATrag ballistics is powered by two easily replaceable, AAA batteries and has two power saving modes to prolong battery life.

Available options:

• NV model
• Bluetooth model

 

Kestrel Horus features: What makes a Kestrel Unique?

• Multifunction instrument
• Graphical three-line displays
• Data capture up to 2500 readings
• Minimum/maximum/average values
• User defined screens
• Language selection
• Compact, rugged design
• High accuracy
• High precision axle and low-friction Zytel® bearings
• User-replaceable impeller
• Fast response temperature sensor
• Easy to read back-lit display
• NV version in olive drab or desert tan has red backlight
• Hard cover protects impeller
• Runs from 2 AAA batteries
• Data upload (with optional PC interface or integrated Bluetooth wireless technology)
• Available in olive drab or desert tan
• 5 year warranty

Additional Information

Kestrel 4500 with Horus	Desert Tan / NV Backlight / Bluetooth, Olive Drab / NV Backlight, Olive Drab / NV Backlight / Bluetooth