USD $25
A double sided slide chart used for frequency calculations. Includes original instruction sheet in German.
Stock: 1
USD $25
This star finder and identifier is more versatile than many others, as it comes with 10 different latitude overlays ensuring this star-finder is useable in many different areas.
Includes manual, 10 latitude overlays, double-sided circular map/chart, and protractor.
Stock: 1
USD $25
Made from two durable acrylic discs with one half having a star map, and the other having the field of view and time of day, this star finder is easy to use and very popular.
Stock: 1
USD $35
Clear and easy to use, this star finder has two concentric rings on one side for lining up the chart to your surroundings, and easy to understand directions on the reverse side.
Stock: 2
USD $25
This chart is configured for 30-40 degrees in the southern hemisphere. This chart not only helps identify which stars are visible at any hour and day, but also shows this information thousands of years into the past, the present, and well into the future.
Stock: 1
USD $150
Don’t be caught in the cockpit without this device! Set comes complete with case, manual, multiple charts, and double sided circular slide rule.
Provides arithmetic and vector solutions for for aircraft speeds of 90 to 2 000 knots, with consideration of errors due to aircraft acceleration. Dead reckoning capability of a plotting board.
Stock: 1
USD $15
If you’re still refusing to use the metric system, and don’t want to do your calculations using fractional lengths of football fields, then this circular slide chart will be very useful. On the inner ring it provides calcualtions in both fractional and decimal quantities.
Stock: 1
USD $35
This ruler uses temperature responsive liquid crystals to read-out room temperature in C/F. It also features metric and imperial measures on the upper and lower edges, and a slide in the center for completing metric/imperial conversions for mass, volume, and distance.
Stock: 1
USD $15
The Sterling “Add-It” machine uses an included stylus to allow a user to add and subtract. Usage directions printed on the front of the device.
Stock: 1
Sphere Research Corporation