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FLIGHT INSTRUMENTS Pitch Tape The pitch tape consists of a horizon line and a pitch scale which is centered on the aircraft symbol. When read in conjunction with the aircraft symbol, it indicates pitch attitude. The pitch scale is displayed in accordance with the selected IRS and is removed when the source is invalid. The pitch scale consists of a tick mark every 5 degrees and is limited to +/. 90 degrees. The negative pitch mark are displayed as dashed lines. The 0 degree pitch mark is replaced with the horizon line. The small vertical lines at either side of the pitch line always points towards the horizon. The pitch scale is removed when the airplane is on the ground and appears when the nose wheel is off the ground. Aircraft Symbol Pitch Tape Flight Path Vector GF1110_066a Airspeed VSPEED Bugs The VSpeed (V1, VR, V2, VFTO, VREF) bugs and labels are displayed in relation to the airspeed tape. Horizon Line The horizon line is conformal to the external scene; however, it will appear above the natural horizon at high altitude due to the curvature of the earth. During very high or low pitch attitude, a non-conformal horizon line is displayed as a dashed line. The horizon line is displayed as wide as the combiner to reinforce attitude awareness during low visibility approaches or when the airplane is in excessive pitch attitude. Roll Scale and Pointer The HUD roll scale consists of tick marks at 0, +5, +10, +20, and +30 degrees displayed above and centered to the airplane reference symbol. Additional marks are displayed for 45 degrees and 60 degrees position when the roll angle exceeds 32 degrees. The roll scale return to the normal format when the bank angle decreases below 28 degrees. Volume 2 Flight Crew Operating Manual Rev 5, Jul 21, 2005 HUD SYMBOLOGY (CONT'D) Roll Scale and Pointer (Cont’d) Roll Scale ointerP Roll Scale Horizon Line 2250 Airspeed VSPEED Bugs GF1110_067a FLIGHT INSTRUMENTS |
