Weight and Balance Calculator

Available for both Android and iPhone


                         


Features

  • Supports most single engine aircraft
  • Can be configured for any number of different aircraft
  • Support both U.S. and Metric units
  • Supports both AvGas & Jet-A (using specific gravity)
  • Calculates maximum fuel allowed for a given passenger and baggage loading (taking into account CG as well as weight)
  • Share W&B reports via email
  • Log changes to aircraft profiles
  • Load balancing: get both weight shift and ballast suggestions when CG is out of bounds
  • Intuitive touch-screen interface (or keyboard if preferred)
  • Stand-alone app does not require internet or phone connection -- use anywhere, any time

 

 

Main Screen   

Enter fuel on board, burn rate, duration, and the weight for each station. 
 
The graph at the bottom shows the Center of Gravity limits for this aircraft.  The upper green dot represents the takeoff CG & weight and the lower green dot, the landing CG & weight.   The dots are green because the CG limits are satisfied.

Tapping on an entry box pops up a number pad:

 
This mini-calculator makes it easy to sum the weights of the passengers or baggage located at each station, and to easily "move" weight between stations.
 
 

Reporting Problems 

When weight or CG limits are exceeded: 
  • the corresponding numbers and dots turn red
  • a warning notification appears in the status bar
  • the phone vibrates briefly to get your attention
View the notification from the status bar for a description of the problem:
 

 

This program will also generate warnings if fuel would be exhausted assuming the current burn and duration, or if the landing reserve would be less than 1 hour. 

 

Creating a profile: Basic Info

Defining a new aircraft profile is very simple and can be done in just a couple of minutes.  The profile is comprised of three parts:
  1. Basic information about the aircraft (e.g., empty weight and arm)
  2. Center of gravity limits
  3. Station locations
The screen to the right shows the basic information for the sample profile.  Scroll down to see the CG Limits and Stations tabs. 

Any number of profiles can be created and are saved until you delete them.  The profile selection screen allows you to switch between profiles, create a new profile (via the menu button), or delete an existing profile:
 
 

Creating a profile: CG Limits

 The Center of Gravity Limits graph (sometimes referred to as the CG Envelope) is located in the weight and balance section of the POH.  This graph shows the maximum weight allowed at each CG. 
 
To define the graph we only need a few points: 
  • the first point, showing the maximum weight allowed at the forwardmost CG;
  • the last point, showing the maximum weight allowed at the aftmost CG;
  • and each intermediate point where the limit line bends. 
Pressing the 'menu' button leads to a help screen that includes the above instructions and a link to the following example taken from the POH for the sample aircraft:
 
 

Creating a profile: Stations

The final step in creating the profile is to define the seating and baggage stations.  You can define as few or as many stations as required.  For each station, simply select a name from the drop down list and enter the arm.  The drop-down list includes the following names:

  • Front seats
  • Back seats
  • Seating row 1
  • Seating row 2
  • Seating row 3
  • Baggage A
  • Baggage B
  • Baggage C
  • Fwd Baggage
  • Aft Baggage