DATAMATH CALCULATOR MUSEUM |
Jeppesen Sanderson prostar by Texas Instruments
Date of introduction: |
1982 |
Display technology: | LCD |
New price: | Display size: | 8 | |
Size: | 5.8" x 3.1" x 0.90" 147 x 79 x 23 mm3 |
||
Weight: | 3.7 ounces, 106 grams | Serial No: | 8765830 |
Batteries: | 2*LR44 | Date of manufacture: | wk 46 year 1983 |
AC-Adapter: | Origin of manufacture: | USA (ATD) | |
Precision: | 11 | Integrated circuits: | TP0456/CD4575, CD4576 |
Memories: | 2 | ||
Program steps: | Courtesy of: | Bill Wood | |
Download manual: | (US: 20.8M Bytes) |
This
Flight computer developed between the Aviation specialist Jeppesen Sanderson and
calculator manufacturer Texas Instruments is based on the TI-55-II
model introduced in the year 1981.
The
colorful keyboard of this Flight computer makes it easy
to understand the functions.
•
Alt/AS: Calibrated, True Airspeed, Pressure,
Density Altitude • WIND: Wind Speed, Direction, Course and Heading • TSD: Time-Speed-Distance, Distance and fuel consumption • CMP: Computes in the above modes the different values • CNV: Convert between US and SI-units • T: Time calculations |
Compared to the earlier avstar based on a simple TI-35 the prostar added some features:
•
LAT/LONG: Latitude and Logitude mode solves great circle
bearing • WT/BAL: Weight and Balance mode calculates center of gravity |
Dismantling
this Jeppesen Sanderson prostar manufactured in October 1983 reveals a well
known design similiar to the TI-55-II with two TP0456 calculator chips.
In 1985 Texas Instruments canceled production of the TI-55-II
due to problems with the keyboard and introduced the new TI-55-III.
As a result even this prostar was upgraded, view the second edition here.
Later Flight computers sold by Jeppesen Sanderson like the Techstar based on a non-TI design.
The Illinois based company Specialized Electronics Corporation (SEC) intoduced one year later the sophisticated Navtronic Explorer.
If you have additions to the above article please email: joerg@datamath.org.
© Joerg Woerner, December 5, 2001. No reprints without written permission.