Basic (required) Input Blocks:

 

   Bullet Inputs:

             Caliber

             Weight

             BC (G1 or G7)

             Muzzle Velocity

 

   Atmosphere Inputs:

             Temperature

             Pressure

             Humidity

             Wind Speed

             Wind Direction

 

   Target and Sight Inputs:

             Sight Height

             Zero Range

             Correction Factor

             Look Angle (uphill/downhill)

             Shot Range (yards or meters)

 

The MOBALL Solution

             The Mobile Ballistics Solution is offered to long range shooters for a specific purpose: to calculate accurate sight corrections in the field, based on current environmental conditions.

            

Details of Operation

The MOBALL interface consists of a series of input blocks; some required and some optional.  When all the inputs are entered, the program runs and outputs the sight corrections required to hit the specified target.  Below are images of all the input blocks, required and optional.

 

 

 

 

 

 

 

 

 

 

Below is a full list of required and optional inputs.  You may notice that MOBALL has some features not available in some basic ballistic solutions like G7 BC compatibility, spin drift, coriolis effect, and multiple winds.

            

Product Description

             The MOBALL program runs on the Texas Instruments Voyage 200 graphing calculator, which is included in the purchase price.  The TI Voyage has a lot of capability aside from it’s use as a ballistics computer including advanced math functions, as well as data and text editors that can be used as a shooting log, or to store information about loads, sights, etc.  High school and college students can use the graphing calculator features of the TI Voyage in class, and run the state of the art ballistics program in the field.

             Unlike modern PDA’s and cell phones, the TI Voyage is not a network device; meaning you don’t have to worry about purchasing a wireless plan, or any other kind of recurring fee.

            

 

 

 

 

 

 

 

 

 

 

 

            

             The unit is about 7” X 4.5” X 1” in size, weighs less than 1 lb, and runs on 4 ordinary AAA batteries.  The buttons are relatively large and comfortably spaced.  The QWERTY keyboard allows easy text entry and the large screen displays information clearly.  You can read more about the specifications and capabilities of the TI Voyage at this link.

             The picture above shows the size of the TI Voyage in comparison to some familiar items.

Optional Input Blocks:

 

   Spin Drift Inputs:

             Bullet Length

             Spin Rate

             Spin Direction

 

   Coriolis Inputs:

             Latitude

             Azimuth of fire

 

   Multiple Winds:

             Wind speed and direction              in 3 different zones.

 

Domestic (USA)

Cost: $290.00 + Shipping

International

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Additional Information:

 

   Accuracy of the Solution

   Significance of the G7 BC

   Users Manual

What sets MOBALL apart?

There are many mobile ballistics programs out there, what makes MOBALL any different from them?  There are a few answers to this question. 

First, MOBALL has the capability to calculate trajectories based on BC’s that are referenced to the G7 standard in addition to the conventional G1.  Basically, the G7 standard is a better fitting model for long range bullets.  Using accurate G7 BCs results in more accurate trajectory calculations over a wide range of bullet flight speeds.  Several ballistics programs for PC have the capability to use G7 BC’s, but very few of the mobile PDA’s are capable of accepting G7 BC’s.  The graphic below shows the G1 standard projectile in comparison to the G7 standard projectile.  For best results, you should use a BC for the standard projectile that more closely matches the shape of the bullets you shoot.

 

 

 

 

G1 Standard Projectile                          G7 Standard Projectile

 

You can read this article to learn more about the significance of the G7 BC.

Another thing that sets MOBALL apart from similar devices is the extensive list of variables that the program accounts for.  In addition to all the standard features available in other programs, MOBALL offers the option to account for the effects of spin drift, coriolis effect, and multiple winds (up to 3 range segments).

One of the most common causes of ballistics solutions being mis-applied has to do with the fact that scope adjustments don’t always move exactly as they’re supposed to.  MOBALL has the ability to apply a correction factor to the calculated sight corrections which allows you to account for imperfect sight adjustments of your individual scope.  There is a dedicated utility function included in the MOBALL package that will help you determine the calibration factor for your scope based on a simple test.

Finally, MOBALL is a simple program to use.  The inputs are straight-forward and the user is not burdened or distracted with the requirement to input unnecessary items.  Only the essential inputs are required, and only the essential outputs are displayed.

Newly added as of Jan 2010: Metric range and drop (Meters and MILS)