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APPENDIX Readings Manually Recorded During Second Series of tests 1/ A: Altitude at commencement of buffeting (feet) B: Altitude at which recovery was effected (feet) C: Total loss of altitude (feet) D: Altitude lost during recovery 2/ (feet) E: Maximum rate of descent (feet per minute) F: Stabilized rate of descent (feet per minute) G: R.P.M. at which propeller pitch control was set to govern H: R.P.M. setting to which propeller pitch control was advanced prior to application of full power I: Highest indicated R.P.M. J: Inches manifold pressure used until buffeting condition was reached K. Indicated air speed during approach to stall (miles per hour) L: Indicated air speed on entering buffeting condition (miles per hour) M: Minimum indicated air speed (miles per hour N: Propeller pitch angle during approach to stall (degrees) O: Propeller pitch angle when buffeting commenced (degrees) P: Propeller pitch angle during descent (degrees) Q: Maximum propeller pitch during recovery (degrees) |[[test]]| A | B | C | D | E | F | G | H | I | J | K | L | M | N | O | p | Q | |First test|6,000|5,000|1,000|50|1,900|1,300|2,050| |2,300|25|80|60|45 /3|25|24|30|33| |Second test|5,300|4,900|400|50|1,400| |2,050|2,450|2,600| |80|65| |24 1/2|18|22|26| |Third test|5,300|4,800|500|0|1,300|1,000|2,250| |2,600| |80|65| |20|18 1/2|25|29| |Fourth test|5,300|5,100|200|20|1,100| |2,250|2,450|2,800|22|80| | |21|18|22|23| |Fifth test|5,700|5,300|400|30|1,000|400|2,450| | |20|80| | |18|18|23|24| |Sixth test|5,800|5,300|500|0|1,600| |2,050| |2,280|25|80 | | |24|28|28 to 23|22| 1/ Due regard must be had to the possibility of inaccuracy of the instruments as a result of the severe vibration. 2/ The period from the time that the nose was lowered until recovery was completed. 3/ See Footnote 1 above. It is unlikely that the airspeed actually reached this extremely low rate. 5-20579