AV8R v1.0
Flight Planning Software for your PalmPilot/WorkPad
Copyright 1997
by Kirk Lindberg

LEGAL STUFF
The software is provided "as is" and no warranties or guarantees are expressed or implied. The software provider shall not be liable for any incidental or consequential costs, expenses, or damages incurred by use of AV8R software.  

CONTENTS
Introduction
Installation
Using AV8R
   General usage
   The Conversion menu
      1. Temperature
      2. Distance
   The Calculate menu
      1. Time/Distance
      2. Time/Fuel
      3. Weight & Balance
      4. Density Altitude & True Airspeed
      5. Wind Correction & Ground Speed

INTRODUCTION
There are two versions of AV8R - a fully functional shareware demo package with a 30 day timeout, and the registered version.  There is a $10 fee for the registered version, with proceeds going to the EAA Young Eagles program.  To register, contact PalmPilotGear H.Q. on-line at www.pilotgear.com or call them at 817-461-3480. They will process your credit card and e-mail the registered code to you. If this won't work for you, see the AV8R web site at www.wavefront.com/~dd/av8r for more info.

INSTALLATION
1. Unzip the AV8R.zip file.
2. Using the PalmPilot Install Tool, install Av8r.prc (or Av8r-demo.prc for the demo version), MathLib.prc and,
    a. CASLrt_5k.prc if you have a PalmPilot 1000/5000 or,
    b. CASLrt_pro.prc if you have a PalmPilot Professional
3. HotSync your PalmPilot.

If you are installing the demo version, you will be able to use the software for 30 days after the installation.  If you are installing the registered version after you have already installed the demo version, delete the demo version from your PalmPilot using the Memory application before installing the registered version.  If you have saved data in the Weight & Balance database, it will still be accessible after replacing the demo version with the registered version.

USING AV8R
General Usage
All functions are accessed via the pulldown menus.  AV8R is designed so that results from one calculation are carried over to the next calculation or function.  For example, you can convert a temperature from Fahrenheit to Celcius, then when calculating TAS (True Airspeed), the temperature is automatically filled in.  After calculating TAS, when calculating Wind Correction, the TAS is automatically filled in for that calculation.  It should be noted that the formulas used to calculate DA (Density Altitude) and TAS are optimized for use at the speeds and altitudes typical single engine and light twin aircraft fly.  Higher altitudes (>15,000') and airspeeds (>250 kts) may see slight errors.

Temperature Conversion (F <-> C)
To convert a temperature between Fahrenheit and Celcius, simply enter the temperature in the data entry field, then select the desired function - "Convert to Degrees F", or "Convert to Degrees C".

Distance Conversion (sm <-> nm)
To convert distance between Statute and Nautical miles, simply enter the distance in the data entry field, then select the desired function - "Convert to Statute miles", or "Convert to Nautical miles".

Time/Distance Calculation (Time/Dist)
Initially, the data entry fields will be hidden.  First select what you want to calculate by using the appropriate button.  Then the data entry fields will appear as well as the Calculate button.  Enter the data in the two appropriate fields, then select the "Calculate" button to calculate the third item.

Time/Fuel Calculation (Time/Fuel)
This works exactly the same as the Time/Distance calculation.  "Fuel" can be either pounds or gallons, and "Burn Rate" will then be in the same units (pounds or gallons per hour).

Weight & Balance Calculation (Wt/Bal)
This is the most complicated of the calculations, from a data entry perspective.  Entry fields are available for the empty aircraft, front, middle and rear seats, fuel and two baggage compartments.  To calculate Wt/Bal, enter all the appropriate arms and weights, then select "Calculate".  The Total Arm (Center of Gravity), Total Weight and Total Moments will all be calculated.  Selecting "Clear" will clear all the Moment and Weight fields except the A/C Empty Weight.  You may store data for up to 20 different aircraft or aircraft weight configurations. The Arms and A/C Empty Weight are stored along with a description of the aircraft (N-number is typically used).  To store aircraft data, enter the Aircraft description, A/C Arm and Empty Weight, and Arms for the datum locations appropriate to the aircraft, then select "Save". A confirmation message will display at the bottom of the screen if the save is successful.  If more than 20 entries are attempted to be saved, a error message will display at the bottom of the screen.  To recall saved aircraft data, select the "Aircraft" button, then select the desired one from the scrollable list.  To delete a aircraft record from the database, select the desired aircraft, then select the "Delete" button.

Density Altitude & True Airspeed Calculation (DA/TAS)
This works similiar to the Time/Distance calculation.  Select which item you want to calculate, then the appropriate data entry fields will appear.  Enter the data and select "Calculate".  Selecting to calculate TAS will also calculate DA, since the DA is required to calculate the TAS.  Pressure Altitude is determined by setting your Altimeter to 29.92" and Calibrated Airspeed (CAS) is read from your airspeed indicator. Technically, to get CAS you need to correct the Indicated Airspeed (IAS) for calibration errors, but these errors are normally negligible.  Note that the Outside Air Temperature (OAT) must be entered in degrees Celcius.  The "Clear" button will clear all fields.  

Wind Correction (Wind)
Again, you need to select what you want to calculate.  You can either enter heading and groundspeed data to calculate the wind speed and direction (you might do this in flight to determine the actual winds aloft), or you can enter wind speed and direction and then calculate heading and groundspeed (this is what would normally be done when flight planning based on the winds aloft forecast).  In either case, you also need to enter the desired course to fly (in degrees) and the TAS.  Note that it is possible, if you have a slow airplane and high crosswind, to not be able to fly the desired magnetic course.  If this happens, a message to that effect will display.  It is also possible to have a higher headwind component than your TAS resulting in negative ground speed.
