Description
The Carl Zeiss Lotfernrohr 7 (Lot meant “Vertical” and Fernrohr meant “Telescope”), or Lotfe 7, was the primary series of bombsights used in most Luftwaffe level bombers, similar to the United States’ Norden bombsight, but much simpler to operate and maintain. Several models were produced and eventually completely replaced the simpler Lotfernrohr 3 and BZG 2 bombsights. The Lotfe 7C, appearing in January 1941, was the first one to have gyroscopic stabilization. The Norden consisted of two primary parts, the optical system, and a large stabilization platform. Both were complex and had to be separately maintained to keep them operational. In the Lotfe 7, a similar set of gyroscopes to that of the Norden, provided a stabilized platform for the bombardier to sight through, although the more complex interaction between the bombsight and autopilot of the Norden was not used. The Lotfe 7 was dramatically simpler, consisting of a single metal box containing the vast majority of the mechanism, with a tube (Rohr) extending out the bottom with a mirror that reflected the image of the target into a small telescope in the box. The mechanisms within combined the functions of the Norden’s stabilizer and optics, moving the mirror to stabilize the image as well as tracking the target. The controls were likewise much simpler than the Nordens’, consisting primarily of three large knurled knobs to adjust aim Operation was fairly similar to the Norden. The bombardier would first locate the target in the bombsight and continue to adjust the dials until it remained motionless in the eyepiece. This allowed the bombsight to calculate the wind speed from the cancelled out drift rate, which in turn allowed to make an accurate calculation of groundspeed. Unlike the Norden, the Lotfe 7 could view targets directly in front of the aircraft, so the bombardier could use the real target for adjustments, rather than having to “tune” the instruments on a test target located closer to the aircraft. The bombsight could be used against targets 90° to 40° in front of the aircraft, and up to 20° on either side. On final approach, the autopilot was engaged, while the bombsight adjusted the flight path in response to last-minute changes by the bombardier. Bomb release was normally automatic in order to reduce timing errors. The Lotfe 7 was normally installed near the nose of the aircraft with the mirror tube projecting through the fuselage to the outside of the aircraft. In most installations, like those in the Junkers Ju 88 or Heinkel He 111, the tube ended in a fairing under the fuselage with a protruding flat window in front. In other cases, like the Arado Ar 234 or the prototype bomber conversions of the Messerschmitt Me 262, the tube was open to the air, mounted so the mirror window was almost flush with the fuselage line. In the case of the single-seat Ar 234, the bombsight was difficult to access, so the autopilot was engaged first, allowing the pilot to remove the control yoke and access the bombsight. Made of solid brass, aluminum, and steel, this Lotfe 7D bombing sight in is in AMAZING used condition! Produced around 1944, it retains approx. 95% of it’s original paint and finish, however there are some marks and scratches due to the age. All data information is also clearly legible! It is 100% COMPLETE, with no damage, however, I have not been able to test it electrically, so I do not know if it is electrically functional. The optics are VERY CLEAR with almost NO spotting or haziness (please note that the yellow tint shown in the photos is just from the surrounding lighting). Comes complete with original data cards that slip in the top pocket (one is cracked/broken)…as well as the original fold out card manual that was kept at the bombardiers position! I have indicated it’s location in the last photos. RARELY seen on the market, this is EASILY the nicest one I have ever seen! Would make a PERFECT addition to any collection or display! |
