DATAMATH CALCULATOR MUSEUM
Jeppesen Sanderson prostar by Texas Instruments
|Date of introduction:||
|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:||CD4575, CD4576|
|Program steps:||Courtesy of:||Bill Wood|
|Download manual:||(US: 20.8 MByte)|
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,
• 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
• WT/BAL: Weight and Balance mode calculates center of gravity
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.
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© Joerg Woerner, December 5, 2001. No reprints without written permission.