Janus Series
Slide rule
Navigators dual face slide rule (N.52) Janus Series.
White plastic rule with perspex cursor.
On the face of the rule are four logarithmic scales A B C & D. These are divided primarily into whole numbers and subdivided into 1/10s and 1/100s as space permits. Also on the face are trigometrical scales of sines, tangents and cosines. On the reverse of the rule are scales for finding true altitude, density altitude, true air speed and for converting Farenheit to Centigrade and nautical miles to statute miles and kilometres.
Navigators dual face slide rule (N.52) Janus Series.
White plastic rule with perspex cursor.
On the face of the rule are four logarithmic scales A B C & D. These are divided primarily into whole numbers and subdivided into 1/10s and 1/100s as space permits. Also on the face are trigometrical scales of sines, tangents and cosines. On the reverse of the rule are scales for finding true altitude, density altitude, true air speed and for converting Farenheit to Centigrade and nautical miles to statute miles and kilometres.
For more information about using images from our Collection, please contact RMG Images.
Object Details
ID: | NAV0187 |
---|---|
Type: | Slide rule |
Display location: | Not on display |
Creator: | Blundell Rules Ltd |
Date made: | circa 1961 |
Credit: | National Maritime Museum, Greenwich, London |
Measurements: | Overall: 7 mm x 328 mm x 66 mm |
Parts: | Janus Series |
Your Request
If an item is shown as “offsite”, please allow eight days for your order to be processed. For further information, please contact Archive staff:
Email: library@rmg.co.uk
Tel: +44 (0)20 8312 6516 (during Library opening hours)
Click “Continue” below to continue processing your order with the Library team.