Calculator, air navigation

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Ingenium, 1987.2620.001
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OBJECT TYPE: dead reckoning, Dalton
DATE: Unknown
ARTIFACT NUMBER: 1987.2620.001

MANUFACTURER: Unknown
MODEL: E-6B
LOCATION: United States of America

More Information

General Information

Serial #: N/A
Part Number: 1
Total Parts: 2
AKA: Dead Reckoning Computer
Patents: N/A
General Description: predom. plastic; metal hub & screws

Dimensions

Note: These reflect the general size for storage and are not necessarily representative of the object's true dimensions.

Length: 24.3 cm
Width: 13.0 cm
Height: N/A
Thickness: 1.2 cm
Weight: N/A
Diameter: N/A
Volume: N/A

Lexicon

Group: Aviation
Category: Navigation instruments & equipment
Sub-Category: N/A

Manufacturer

AKA: Unknown
Country: United States of America
State/Province: Unknown
City: Unknown

Context

Country: United States of America
State/Province: Unknown
Period: possibly 1930's
Canada: Unknown
Function: aircraft navigation: dead reckoning is a way of navigating when there are few or no visible landmarks. A pilot uses dead reckoning when flying over large bodies of water, forests, deserts, or heavy cloud layers. Besides an aeronautical chart, a pilot needs an accurate clock and compass and a small computer for figuring complicated mathematical problems. Working with the chart, the pilot plots (plans) a route in advance. The pilot also figures how long it should take to reach the destination while flying at a constant speed. With the help of the computer, the pilot adjusts the course to allow for the effect of the wind.
Technical: Unknown
Area Notes: Unknown

Details

Markings: lettering on front of circular rule includes: "DALTON DEAD RECKONING COMPUTER/TYPE E-6B/WEEMS SYSTEM OF NAVIGATION/(C) BY PHILIP DALTON ANNAPOLIS, MD. PAT. NO. 2,097,116"
Missing: N/A
Finish: circular slide rule is white with black lettering & numbered graduations; transparent window; green & white sliding grid; black frame with silver hub & screws
Decoration: none

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Unknown Manufacturer, Calculator, air navigation, Unknown Date, Artifact no. 1987.2620, Ingenium – Canada’s Museums of Science and Innovation, http://collections.ingeniumcanada.org/en/id/1987.2620.001/

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