Aircraft take-off distance computer

Claim 1

A MINIMUM GROUND RUN DISTANCE COMPUTER FOR AIRCRAFT COMPRISING, A BASE CARD HAVING A RUNWAY TEMPERATURE SCALE THEREON, SAID BASE CARD ALSO HAVING A PLURALITY OF PRESSURE ALTITUDE CURVES THEREON IN JUXTAPOSITION TO SAID TEMPERATURE SCALE, SAID CURVES SHOWING THE EFFECT OF PRESSURE ALTITUDE VARIATION UPON MINIMUM-GROUND-RUN TAKEOFF DISTANCE, A FIRST TRANSPARENT MEMBER MOUNTED ON AND MOVABLE RELATIVE TO SAID BASE CARD, AND HAVING MINIMUM GROUND-RUN DISTANCE SCALE THEREON, SAID FIRST TRANSPARENT MEMBER HAVING A TEMPERATURE INDEX LINE THEREON, SAID LINE HAVING AN INDEX POINT AT ONE END THEREOF SELECTIVELY ALIGNABLE WITH A PRESELECTED TEMPERATURE ON SAID TEMPERATURE SCALE, SAID TEMPERATURE INDEX LINE EXTENDING SUBSTANTIALLY TRANSVERSELY OF AND INTERSECTING SAID PRESSURE ALTITUDE CURVES UPON ALIGNMENT OF SAID INDEX POINT WITH A PRESELECTED TEMPERATURE, A SECOND TRANSPARENT MEMBER, SAID SECOND TRANSPARENT MEMBER BEING SUPERPOSED ON, AND MOVABLE RELATIVE TO SAID BASE CARD AND FIRST TRANSPARENT MEMBER, SAID SECOND TRANSPARENT MEMBER HAVING A PLURALITY OF GROSS-WEIGHT CURVES THEREON THAT SHOW THE EFFECT OF GROSS WEIGHT UPON MINIMUM GROUND-RUN TAKE-OFF DISTANCE, SAID GROSS-WEIGHT CURVES BEING SO ARRANGED ON SAID SECOND TRANSPARENT MEMBER SO THAT A SELECTED GROSS-WEIGHT CURVE IS ALIGNABLE WITH THE POINT OF INTERSECTION OF SAID TEMPERATURE INDEX LINE WITH A PRESELECTED PRESSURE ALTITUDE CURVE UPON MOVEMENT OF THE SECOND TRANSPARENT MEMBER RELATIVE TO SAID FIRST TRANSPARENT MEMBER, AND SAID SECOND TRANSPARENT MEMBER FURTHER INCLUDING A GROUND-RUN INDEX LINE FORMED THEREON HAVING AN INDEX LINE FORMED THEREON HAVING AN INDEX POINT AT ONE END THEREOF AND MOVABLE ALONG SAID MINIMUM GROUND-RUN TAKE-OFF SCALE, UPON THE MOVEMENT OF SAID SECOND TRANSPARENT MEMBER RELATIVE TO SAID FIRST TRANSPARENT MEMBER UPON ALIGNMENT OF A PRESELECTED GROSS-WEIGHT CURVE WITH THE POINT OF INTERSECTION OF SAID TEMPERATURE INDEX LINE, WITH A PRESELECTED PRESSURE ALTITUDE CURVE, THEREBY PROVIDING AN INDICATION OF MINIMUM GROUNDRUN TAKE-OFF DISTANCE, FOR ZERO HEADWIND, FOR A GIVEN RUNWAY AIR TEMPERATURE, PRESSURE ALTITUDE AND GROSSWEIGHT.