Does anyone still use the hp41 airborne?

[twdeckard]

Thanks for the community for the continued enthusiasm for the hp41 system.

Inspired by some of the amazing tools still available I assembled a collection of routines for hp41cx into a .MOD file. The core is an alarm function which performs a deduced reckoning calculation to estimate lat/long.

It is submitted for amusement only. The principal heading calculation is flawed and magnetic variation is not handled correctly.

As I have time I may refactor the DR calculations to pull out course, heading, wind correction and variation as separate variables. There are a set of routines not included to print out a navigation log of sorts using the original HP printer.

I also need to determine a new variation model.

There is a PDF manual intended mostly as a tribute to all the original cartridges:

http://www.filedropper.com/hp41slantr-g