An evolutionary development of my prior inventions into an improved display form, more compatible to the desires of the overwhelming majority of pilots. This new invention is a natural derivative of my (co-pending application for patent, Ser. No. 629,850, file date July 11, 1984 for Bank and Pitch Indicator) and (co-pending application for patent, file number pending, file date Mar. 25, 1985 for Improved Pitch Indicator for Bank And Pitch Indicator). This new display will be composed of a display face disc, such disc will rotate in unison with the gimbal cage of a rate gyro, gyro deflective sensitivity being airspeed compensated if desired, wherein the display face disc will possess a rectangular window, whereby, a rotating drum display will show thru the window, such display will provide the pilot with a horizon reference demarcation line, painted blue sky above the line, painted black earth below the line and also short definition lines, above and below, showing five, ten, fifteen and twenty degree angle of attack deviation above or below the demarcation line, wherein by comparative reference to an aircraft tail view silhouette etched into the face plate glass, the pilot may easily determine his pitch reference with relation to the relative airstream. The aircraft will be provided with an angle of attack vane, wherein, the rotating drum of the instrument display will rotate in unison with and proportionally to the angular deflection of the angle of attack vane, such deflection being responsive to the relative airstream. The drum centerline axis will also rotate in unison with the gimbal cage, whereby, the horizon reference demarcation line will display to the pilot both bank and pitch by comparative reference to the etched silhouette and will show on or deviation therefrom. This new instrument is by far more trustworthy than a gyro horizon due to complete basic non-tumbling, non-drifting reference, totally immune of earth reference requirement.
