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  • B-17 Ball turret mechanical target computer operating after 70+ years . . .
    WWII Ball turret target computer B-17 Champaign Lady at the Champaign Aviation Museum Please subscribe to our channel Lots of videos about the restorati
  • Gun Sight, Ball Turret, Type K-4 Sperry, B-17, B-24 - AeroAntique
    This is an electro-mechanical, automatic Type K-4 Computing Gun Sight used in the Sperry ball turret in WWII-era heavy bombers such as the B-17 Flying Fortress and B-24 Liberator Mounted within the ball turret, it hung from the 'ceiling' of the turret just in front of the forehead of the turret gunner (see illustrati
  • Sperry K-3 K-4 Computing Gun Sights — Glenns Computer Museum
    The K-3 is a computing gunsight used in used in Sperry upper gun turrets used on the B-17 bomber The K-4 is the same device with a different mount used in the Sperry lower gun turrets on the B-17 Figure 1 shows our two K-3's plus a computing element from a third The other pictures show various views of these devices
  • Need manuals schematic for Sperry K4 gunsight for lower turret ball . . .
    ball turrets The K-3 sight was used in the upper turret of the B-17 and the K-4 was used in the lower ball turret These sights were similar in their computations or range and deflection but they didn't take temperature and acceleration into account These sights didn't use selsyns for position nor did they need to calculate parallax as they
  • Ready. Aim. Fire. - CHM Revolution
    K-3 automatic computing gun sight for upper turret The K-3 airborne computing gun sight was installed aboard planes such as the B-17 It aimed the machine gun based on its own motion and the range to the target View Artifact Detail
  • Now This is a Gunsight, It Came From a B-17(ADDED MORE INFO) - Ruger Forum
    This is the gunsight from a B-17 It was located in the Ball bottom turret It was made by NCR under license from Sperry The sight is an Automatic Computing Sight It has 3 cannon plugs for the power The settings are Target Dimension in Feet wingspan, Range in 100 Yards Elevation 100 Mills (Millibars) Just like you set in an altimeter
  • WW2 USAAF Aircraft – SPERRY K-4 LOWER BALL TURRET COMPUTING GUNSIGHT – NOS
    This gunsight was used specifically in Ball Turret Gunner positions of various bomber aircraft, such as the B-17 Flying Fortress and B-24 Liberator! The K-4 is a computing gunsight installed in Sperry lower ball turrets used on the B-17 and B-24 bombers
  • Vintage Aircraft - Twin Beech
    The Sperry lower ball turret was used in the Boeing B-17 Flying fortress and the Consolidated B-24 Liberator The ball turret was mounted underneath the aircraft and was used to defend the bomber against aircraft attacking from below
  • RARE! WW 2 B-17 Bomber Ball Turret Sperry K-4 Automatic . . . - eBay
    The gunner took aim at his target by looking through the glass screen mounted on an optic head the bottom of the sight, which is aligned to peer through the circular window between his feet





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