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A keystone module is a standardized snap-in package for mounting a variety of low-voltage electrical jacks or optical connectors into a keystone wall plate, face plate, surface-mount box, or a patch panel. Keystone modules have a rectangular face of 14.5 mm wide by 16.0 mm high and are held in place with flexible tabs.
Seven aircraft ordered but delivered as the Y1B-4 and Y1B-6 with different engine installations. Y1B-6 Two pre-production aircraft and three converted B-3As, as the LB-10 but with two 575 hp (429 kW) Wright R-1820-1 engines. B-6A Production version of the Y1B-6, 39 built.
The Keystone entry was for an all metal low winged monoplane bomber with retractable landing gear. The bomber would be powered by two Curtiss V-1570 geared Conqueror engines. With a crew of 5 it was armed with up to 3 x .30 caliber machine guns and could carry 2,000 lbs (907 kg) of bombs on external racks.
4/22 Reconditioning of DH.10 Airco DH.10 Amiens: 5/22 Spare wing de Havilland DH.29 Doncaster: 6/22 Naval carrier fighter with interchangeable wheel and float undercarriages using Armstrong Siddeley Jaguar or Bristol Jupiter engine – Nieuport Nightjar replacement Fairey Flycatcher, Parnall Plover: 7/22 Army reconnaissance aircraft Hawker ...
The Keystone XLB-6 prototype was created by refitting the final triple-tailed Keystone LB-5 (serial number 27-344) with an LB-5A tail unit; longer (75 foot) straight-chord, untapered and noticeably swept-back wings; and 525 hp (391 kW) Wright Cyclone R-1750-1 radial engines suspended on struts between the wings rather than mounted on the lower ...
On April 28, 1931, the army ordered 25 improved Y1B-4s as the Keystone B-4A. This production version was part of the last biplane bomber order made by the Army Air Corps (along with 39 B-6As, identical in all respects except their make of engine), and the B-4As, delivered between January and April 1932, were the last biplane bombers delivered ...
The Lockheed Martin FB-22 was a proposed supersonic stealth bomber aircraft for the United States Air Force, derived from the F-22 Raptor air superiority fighter. Lockheed Martin proposed its design in the early 2000s with support from certain Air Force leaders as an interim "regional bomber" to complement the aging U.S. strategic bomber fleet, whose replacement was planned to enter service ...
Keystone wall plates are made to work with many different types of cabling solutions, including coaxial, twisted pair, HDMI, optical fiber, etc. Keystone wall plates are made of plastic and have one to twelve ports. A keystone port is a hole in the wall plate which allows the insertion of a keystone module or other male or female cabling ...