Disk Speed Indicator Mk XV for use with Norden Sight Eurofighter Typhoon RC-96-A was designed for use

RC-96-A was designed for use in US Army Air Force aircraft to control a radio transmitter so that it will automatically transmit a predetermined type of signal on a predetermined carrier frequency for a period of approximately 14 seconds of each minute

including heavy bombers B-17

SCR-274 was a multi-channel

It is dated 1949

Disk Speed Indicator Mk XV for use with Norden Sight Eurofighter Typhoon RC-96-A was designed for useThe Disk Speed Indicator Mk XV was used by WWII US Army Air Force and Navy bombardiers to verify and calibrate the disk speed of the Norden Bomb Sight during flight before initiating the bomb run. The disk speed is the parameter which determined the duration of flight between sighting of the target and automatic release of the aircraft's ordnance. With the bomb sight switched on, the bombardier would affix the top axle to the small female receptacle