L003495 DR3 FLIGHT NAVIGATION COMPUTER. (Dreieckrechner 3)
BACKGROUND: The Luftwaffe utilized assorted mechanical and electrical radio directional aids, primitive radars, precision target detection equipment and flight personnel were given basic training in manual navigation and map reading. Personnel who had elected or had been chosen to become flight Observer’s undertook further blind flight and navigational training. Along with the mechanical and electrical radio directional navigation aids the Luftwaffe also utilized two different models of manual flight navigation computers which were basically circular slide rulers to assist in navigation calculations. Of Note: The Luftwaffe used a specific Gradnetzmeldeverfahren, ({Map}, Degree Network Reference System), navigation system that was based on the Greenwich longitude/latitude degree system to pinpoint any precise location. The Luftwaffe’s Gradnetzmeldeverfahren differed slightly from the coordinate systems used by the army and the navy.
PHYSICAL DESCRIPTION: Roughly, 15cm diameter, dual sided, multi piece, molded black and white bakelite construction, flight navigation computer with aluminum rivets. One side features a static, molded black bakelite, outer circle with impressed, white, 360 degree numerical compass markings with the four, major, cardinal directional points of, "N", "S" "O" and "W", (North, South, East & West), and the four, inter cardinal, directional points, of, "NO", "SO", SW", and NW", (Northeast, Southeast, Southwest & Northwest). This outer circle encompasses a movable, molded white bakelite,, inner circle which also has impressed, black and red 360 degree numerical compass markings, and the outline of an aircraft with directional arrow. Mounted on top of both of these circles is a clear molded bakelite, movable arm with an additional blue, directional arrow. The inner circle and arm can both be turned to align with the outer circle to determine the appropriate computations. The other side of the computer features molded white bakelite, movable inner and outer circles with a static, molded black bakelite circular ring in between the two. The central, movable, circle has the addition of a molded, clear bakelite movable arm with a red directional arrow. All three circles also have impressed, black, red and white, numerical degrees, temperature and kilometer markings. Both the inner circle and outer circles and the arm can be turned to align with the static, in between circle to determine the appropriate computations. The computer also has impressed green, script which includes the model designation, "Dreieckrechner Baumuster: DR 3 Tp", (Computer Construction Model DR3 Trigonometrical), "Gerät Nr. 127 107 B 1", (Equipment number 127 107 B 1), "Anforderz. FL. 23825", (Flight Requisition number FL. 23825), "Hersteller: Dennert & Pape Hamburg Altona", (Manufacturer and Location), and "Fertigstellung: Nov 1941", (Completion date Nov 1941). Nice example.
GRADE ****1/4
PRICE $389.00
To Order this item, please use one of the two e-mail addresses below to contact us. Please make sure to quote the item number in your e-mail
MILITARIA WANTED! If you have items for sale, please contact us. We specialize in selling single pieces and entire collections. Over 3 decades in the business and we do all the work for you. Get the best return for your investment.
-E-Mail Address pawmac@nbnet.nb.ca Or guild@nb.aibn.com
To return to the main page please CLICK below