{"product_id":"gyrosyn-compass-master-indicator-cl2-sperry-raf-avro-shackleton-english-electric-canberra","title":"Gyrosyn Compass Master Indicator CL2 Sperry RAF Avro Shackleton, English Electric Canberra","description":"\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan face=\"Verdana\"\u003e\u003cspan size=\"4\"\u003e\u003cspan face=\"Arial\"\u003eThis is a Gyrosyn Compass Master Indicator \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003eType C.L.2\u003cspan face=\"Verdana\"\u003e\u003cspan size=\"4\"\u003e\u003cspan face=\"Arial\"\u003e, made by Sperry, as used in large aircraft in both British military and civil service during the 1950's in \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003eReconnaissance\/Bomber aircraft \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan face=\"Verdana\"\u003e\u003cspan size=\"4\"\u003e\u003cspan face=\"Arial\"\u003esuch as the Avro Shackleton and English Electric Canberra\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e, see description below\u003cspan face=\"Verdana\"\u003e\u003cspan size=\"4\"\u003e\u003cspan face=\"Arial\"\u003e. See photos of its placement at the navigators station in the Avro Shackleton and Canberra. It was also placed in passenger aircraft of the BOAC, according to archival documents, but I've not located any specific photo references.\u003cspan face=\"Arial\"\u003e  \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003cdiv\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan face=\"Verdana\"\u003e\u003cspan size=\"4\"\u003e\u003cspan face=\"Verdana\"\u003e \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan face=\"Verdana\"\u003e\u003cspan size=\"4\"\u003e\u003cspan face=\"Verdana\"\u003eMeasures 5.75in diameter and ~10in deep, and rather heavy. \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan rwr=\"1\" size=\"4\"\u003e\u003cspan face=\"Verdana\"\u003eIt is in terrific condition given its age.  The dial markings are clear and the glass and case are intact. The center knob \"Autopilot\" rotates and centers on a detent, but its function must require the correct electrical input.  The Variation Setting knob rotates the card within the small window north of center. There is a thin sliding ring around the dial to which a small triangular pointer is attached, and opposite of the pointer is a small handle for manually rotating the ring to set the pointer on the desired heading.  \u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\u003c\/span\u003e\n\u003cdiv style=\"font-family: Arial; font-size: 14pt;\"\u003e\n\u003cdiv data-canvas-width=\"447.9815999999999\" style=\"left: 556px; top: 1166.07px; font-size: 16.6667px; font-family: serif; transform: scaleX(0.999959);\"\u003e\n\u003cbr\u003e\u003cb\u003eFrom FLIGHT Magazine April 1954 PPs 390-391\u003c\/b\u003e\n\u003c\/div\u003e\n\u003cdiv data-canvas-width=\"447.9815999999999\" style=\"left: 556px; top: 1166.07px; font-size: 16.6667px; font-family: serif; transform: scaleX(0.999959);\"\u003e\u003ci\u003eGyro Magnetic Compass. The G.4.F (fighters) and G.4.B \u003cspan style=\"font-size: 16.6667px;\"\u003e(bombers) will already be familiar to most Service pilots. The \u003c\/span\u003e\u003cspan style=\"font-size: 16.6667px;\"\u003einstrument supplies on a vertical face a constant indication of \u003c\/span\u003e\u003cspan style=\"font-size: 16.6667px;\"\u003eactual magnetic heading. No longer need heading information \u003c\/span\u003e\u003cspan style=\"font-size: 16.6667px;\"\u003ebe obtained from the constantly swinging liquid compass and \u003c\/span\u003e\u003cspan style=\"font-size: 16.6667px;\"\u003efed into a constantly drifting gyro D.I. This compass is both \u003c\/span\u003e\u003cspan style=\"font-size: 16.6667px;\"\u003emagnetic and gyro-stabilized. In all reasonable aircraft attitudes \u003c\/span\u003e\u003cspan style=\"font-size: 16.6667px;\"\u003eit indicates actual heading. There is no noticeable swing or waver, \u003c\/span\u003e\u003cspan style=\"font-size: 16.6667px;\"\u003eand the face itself is large enough to permit accurate course-\u003c\/span\u003e\u003cspan style=\"font-size: 16.6667px;\"\u003eholding to within extremely small limits. It functions, moreover \u003c\/span\u003e\u003cspan style=\"font-size: 16.6667px;\"\u003ein the \"natural\" sense; that is in a left turn the lubber line moves \u003c\/span\u003e\u003cspan style=\"font-size: 16.6667px;\"\u003eto the left round the dial, and \u003c\/span\u003e\u003cspan style=\"font-size: 16.6667px;\"\u003evice versa.  \u003c\/span\u003e\u003cspan style=\"font-size: 16.6667px;\"\u003eBeing partially a gyro \u003c\/span\u003e\u003cspan style=\"font-size: 16.6667px;\"\u003einstrument it has, of course, limits (at plus or minus 85 deg in \u003c\/span\u003e\u003cspan style=\"font-size: 16.6667px;\"\u003epitch or roll). It may subsequently take a long time to \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003ere-align if left by itself—several hours for 180 deg. But this \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003eis immediately noticeable, and resetting is simplicity \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003eitself. \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003eThe \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003epilot merely presses the clearly marked button and turns \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003eit until the dot and cross in the annunciator window (two o'clock \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003ein the dial rim) alternate steadily. If for some reason the magnetic \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003edetector unit fails, the compass can be employed as a plain \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003egyro D.I. \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003eSperry produce three versions of the instrument, the C.L.I \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003e(and C.L.1A), the C.L.2 and the C.L.3. These correspond \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003erespectively to the Services' G.4.F, G.4.B, and G.4.F.T. The \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003eC.L.I is a straightforward gyro-magnetic compass using magnets \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003efor deviation correction of the detector unit (usually located in the \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003etail or wingtip), an amplifier and the indicator. The C.L.I A is \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003esimilar, but utilizes an electro-magnetic compensation system, so \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003ethat this can be carried out from the cockpit. The C.L.2, intended \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003eprimarily for large aircraft, is the instrument specified for the \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003eB.O.A.C. panel. It has a detector unit, an amplifier and a master \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003eindicator located at the navigator's position, with a control panel. \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003eOne or two gyro units almost identical in appearance with the \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003eC.L.I are fitted in the pilots' panels. If required, local magnetic \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003evariation can be set in at the master indicator so that all indica\u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003etions will be in relation to true north. The C.L.3 is a combina\u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003etion of the C.L.I and 2; it is intended for aircraft in which a \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003enavigator is not carried, but where variation control and azimuth \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003emonitoring of Air Position Indicator or radio compass are required. \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003eThe compass dial in this case is identical with that of the C.L.I. \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003eIt can be said that a compass of the G.4.F type is now regarded \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003eas vi for jet aircraft where accurate and constant directional \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003einformation must be provided, even during violent and prolonged \u003c\/span\u003e\u003cspan style=\"font-size: 15px;\"\u003emanoeuvring at high speed.\u003c\/span\u003e\u003c\/i\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e","brand":"Sperry","offers":[{"title":"Default Title","offer_id":67753991602464,"sku":"tea1791920502982","price":40.7,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1003\/7054\/6976\/files\/gyrosyn-compass-master-indicator-cl2-sperry-raf-avro-shackleton-english-electric_1.jpg?v=1791920508","url":"https:\/\/dailystylestore.shop\/products\/gyrosyn-compass-master-indicator-cl2-sperry-raf-avro-shackleton-english-electric-canberra","provider":"My Store","version":"1.0","type":"link"}