January 14, 2009

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This journey through my Concorde collection continues by discovering all of the Cockpit Instruments used on the Concorde Development Fleet.

Thanks to my meetings on the web with “retired” people from Sud Aviation and Air France and following my participation in official auctions, I was likely to obtain parts of this extraordinary plane…

The total number of Cockpit Instruments from the Concorde Development Fleet is as of 05/12/2008: 8

Cockpit Instruments from the Concorde Development Fleet

1- Centre of gravity indicator from Intertechnique, Reference: 66 393 671 02 - November 1973

Instrument which was part of the items proposed at the auction at Christie's in November 2003 and sold for 11 750 euros (lot number 89)!

2- Automatic pressure regulating selector from Normalair-Garrett located on the third crew member's panel. Reference: 66 558 021 00 - March 1973

Instrument which was part of the items proposed at the Toulouse auction in September 2007 and sold for 400 euros (lot number 326) and 450 euros (lot number 648)

3- Aircraft chronograph watch from Omega and used on the Concorde Development Fleet, Reference: 66 618 002 07 - June 1972

Artistic Pictures of the Omega Chronograph: Art Gallery

Few pictures from inside the Omega chronograph, pictures provided by the Omega museum in Biel (Switzerland) including the author of the Omega "bible", Marco Richon.

This chronograph watch was developed to equip the Concorde Development Fleet. It is an electronic instrument using a sound resonator (OMC-MC1) and combining a digital clock 24 hours GMT and the meter board. It is a pitch low from the manufacturer Rene Roth using a frequency of 2 KHz, much more resistant to mechanical shock and vibration compared to the Bulova pitch low of 360 Hz, which did not meet the requirements for the Concorde. Previously, the company had equipped the Concorde Prototypes 001 and 002 with separate Omega instruments... on one side with an instrument using a sound resonator (OMC-C1) and on the other side an electronic clock (OMC-M1) with digital display of GMT time.

Indeed, following a call for tender from Sud Aviation in 1967, Omega is chosen to provide clock instruments of the future Franco-British supersonic. These instruments developed for the Concorde were driven by a high-frequency resonator provided by the Institute of Straumann in Waldenbourg.
They met a series of stringent requirements in terms of thermal resistance, humidity, pressure, vibrations, accelerations and shocks. Additional tests were also conducted in atmospheres of salt spray, as a result of various contaminants and even when subjected to attack by certain fungi ...

4- Vertical speed indicator from DBA used on the Concorde Development Fleet. Reference: 66 003 035 00 - September 1971

5- Artificial Horizon (ADI - Attitude Display Indicator) from Sfena used on the Concorde Development Fleet, Reference: 66 849 085 00 - February 1973

Instrument which was part of the items proposed at the Toulouse auction in September 2007 and sold for 7 500 euros (lot number 64) and 26 000 euros (lot number 528)!

Artistic Pictures of the Artificial Horizon: Art Gallery

An attitude indicator (ADI), also known as gyro horizon or artificial horizon, is an instrument used in an aircraft to inform the pilot of the orientation of the aircraft relative to earth. It indicates pitch (fore and aft tilt) and bank (side to side tilt), and is a primary instrument for flight in instrument meteorological conditions.

Attitude indicators use a gyroscope to establish an inertial platform.
The rotary motion of the gyroscope is driven by an electric motor. The gyroscope is geared to a display that has two dimensions of freedom, simultaneously displaying pitch and bank. The display may be colored to indicate the horizon as the division between the two colored segments : blue for sky and brown for ground.

The actual bank angle is calibrated around the circumference of the instrument. The pitch angle is indicated by a series of calibration lines, each representing
5° or 10° of pitch. The calibration lines on the Concorde ADI were specific, following the request from André Turcat, as it also indicates lines representing 2° of pitch.

6- Horizontal Situation Indicator (HSI) from Sfena, Reference: 66 849 069 01 - May 1974

Instrument which was part of the items proposed at the auction at Christie's in November 2003 and sold for 14 100 euros (lot number 9)!

Artistic Pictures of the HSI: Art Gallery

The HSI is an aircraft instrument normally mounted below the artificial horizon in place of a conventional directional gyro (DG). It combines both the DG and the VOR display, reducing pilot workload by lessening the number of elements in the pilot's instrument scan. The HSI instrument also includes a glide slope needle so that an ILS instrument approach can be flown with reference only to the six basic flight instruments. Among other advantages, the HSI offers freedom from the confusion of reverse sensing.

On the HSI, the airplane is represented by a schematic figure in the center of the instrument. The VOR/ILS localizer is shown in relation to the airplane figure. The heading indicator is slaved to a remote compass-integrating the heading indicator and VOR/ILS (with glide slope). It is frequently interconnected with an autopilot with altitude hold and the capability of following the glide slope all the way to the decision height and beyond.

On a conventional VOR indicator, left/right and to/from must be interpreted in the context of the selected course. When an HSI is tuned to a VOR station, left and right always mean left and right and TO/FROM is indicated by a simple triangular arrowhead pointing to the VOR. If the arrowhead points to the same side as the course selecter arrow, it means TO, and if it points behind to the side opposite the course selecter, it means FROM.

7- Crew oxygen mask regulator EROS (Intertechnique), Reference: 66 393 894 00 - October 1975

8- Machmeter from Kollsman Instrument Ltd, Reference: 66 441 054 03 - June 1979

Instrument which was part of the items proposed at the Toulouse auction in September 2007 and sold for 26 000 euros (lot number 310), 29 000 euros (lot number 568) and 26 000 euros (lot number 791)!

Artistic Pictures of the Machmeter: Art Gallery

A Machmeter is an aircraft pitot-static system flight instrument that shows the ratio of the true airspeed to the speed of sound, a dimensionless quantity called Mach number. This is shown on a Machmeter as a decimal fraction. An aircraft flying at the speed of sound is flying at a Mach number of one, expressed as "Mach 1.0".

As an aircraft in transonic flight approaches the speed of sound, it first reaches its critical mach number, where air flowing over low-pressure areas of its surface locally reaches the speed of sound, forming shock waves. The indicated airspeed for this condition changes with ambient pressure, which in turn changes with altitude. Therefore, indicated airspeed is not entirely adequate to warn the pilot of the impending problems. Mach number is more useful, and most high-speed aircraft are limited to a maximum operating Mach number, also known as as "Mmo".

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