Free-spinning-tunnel investigation of a 1/30-scale model of the Grumman XS2F-1 airplane : TED No. NACA DE 366

Free-spinning-tunnel investigation of a 1/30-scale model of the Grumman XS2F-1 airplane : TED No. NACA DE 366

Date: September 17, 1952
Creator: Healy, Frederick M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Free-Spinning-Tunnel Investigation of a 1/28-Scale Model of the North American FJ-4 Airplane with External Fuel Tanks, TED No. NACA AD 3112

Free-Spinning-Tunnel Investigation of a 1/28-Scale Model of the North American FJ-4 Airplane with External Fuel Tanks, TED No. NACA AD 3112

Date: July 23, 1958
Creator: Healy, Frederick M.
Description: A supplementary investigation to determine the effect of external fuel tanks on the spin and recovery characteristics of a l/28-scale model of the North American FJ-4 airplane has been conducted in the Langley 20-foot free-spinning tunnel. The model had been extensively tested previously (NACA Research Memorandum SL38A29) and therefore only brief tests were made to evaluate the effect of tank installation. Erect spin tests of the model indicate that flat-type spins-are more prevalent with 200-gallon external fuel tanks than with tanks not installed. The recovery technique determined for spins without tanks, rudder reversal to full against the spin accompanied by simultaneous movement of ailerons to full with the spin, is recommended for spins encountered with external tanks installed. If inverted spins are encountered with external tanks installed, the tanks should be jettisoned and recovery attempted by rudder reversal to full against the spin with ailerons maintained at neutral.
Contributing Partner: UNT Libraries Government Documents Department
Free-spinning-tunnel investigation of a 1/28-scale model of the North American FJ-4 airplane : TED No. NACA AD-3112

Free-spinning-tunnel investigation of a 1/28-scale model of the North American FJ-4 airplane : TED No. NACA AD-3112

Date: February 11, 1958
Creator: Healy, Frederick M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Investigation of Incipient Spin Characteristics of a 1/35-Scale Model of the Convair F-102A Airplane, Coord. No. AF-AM-79

Investigation of Incipient Spin Characteristics of a 1/35-Scale Model of the Convair F-102A Airplane, Coord. No. AF-AM-79

Date: February 11, 1958
Creator: Healy, Frederick M.
Description: Incipient spin characteristics have been investigated on a l/35-scale dynamic model of the Convair F-10% airplane. The model was launched by a catapult apparatus into free flight with various control settings, and the motions obtained were photographed. The model was ballasted for the combat loading. All tests were made with the speed brakes and landing gear retracted, and engine effects were not simulated. The results of the investigation indicated that the model would enter motions apparently simulating entry phases of spins when the elevators were deflected full up. Deflecting the rudder had little effect on the direction of the motion obtained, but when ailerons were deflected the model always rotated in a direction opposite to the aileron setting (that is, the model entered a right spin with the stick to the left). The ailerons were very influential in initiating spin entry, and the pilot should avoid, as far as possible, the use of ailerons in low-speed flight.
Contributing Partner: UNT Libraries Government Documents Department
Incipient spin characteristics of a 1/25-scale model of the Chance Vought XF8U-1 airplane : TED No. NACA AD 3118

Incipient spin characteristics of a 1/25-scale model of the Chance Vought XF8U-1 airplane : TED No. NACA AD 3118

Date: April 17, 1958
Creator: Healy, Frederick M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Spin-Tunnel Investigation of a 1/28-Scale Model of a Subsonic Attack Airplane

Spin-Tunnel Investigation of a 1/28-Scale Model of a Subsonic Attack Airplane

Date: July 1, 1964
Creator: Lee, Henry A. & Healy, Frederick M.
Description: An investigation has been made of a 1/28-scale model of the Grumman A-6A airplane in the Langley spin tunnel. The erect spin and recovery characteristics of the model were determined for the flight design gross weight loading and for a loading with full internal fuel and empty external wing fuel tanks. The effects of extending slats and deflecting flaps were investigated. Inverted-spin and recovery characteristics of the model were determined for the flight design gross weight loading. The size of the spin-recovery tail parachute necessary to insure satisfactory spin-recovery was determined, and the effect of firing wing-mounded rockets during spins was investigated.
Contributing Partner: UNT Libraries Government Documents Department
Comparison of effects of ailerons and combinations of spoiler-slot-deflector arrangements on spin recovery of sweptback-wing model having mass distributed along the fuselage

Comparison of effects of ailerons and combinations of spoiler-slot-deflector arrangements on spin recovery of sweptback-wing model having mass distributed along the fuselage

Date: November 24, 1954
Creator: Healy, Frederick, M & Klinar, Walter J
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Comparison of model and full-scale spin recoveries obtained by use of rockets

Comparison of model and full-scale spin recoveries obtained by use of rockets

Date: February 1, 1954
Creator: Burk, Sanger M , Jr & Healy, Frederick M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Free-spinning tunnel investigation of the 1/21-scale model of the chance vought F7U-3 airplane : TED No. NACA DE 362

Free-spinning tunnel investigation of the 1/21-scale model of the chance vought F7U-3 airplane : TED No. NACA DE 362

Date: November 9, 1951
Creator: Klinar, Walter J & Healy, Frederick M
Description: None
Contributing Partner: UNT Libraries Government Documents Department
Free-Spinning-Tunnel Investigation of a 1/24-Scale Model of the Grumman F9F-6 Airplane TED No. NACA DE 364

Free-Spinning-Tunnel Investigation of a 1/24-Scale Model of the Grumman F9F-6 Airplane TED No. NACA DE 364

Date: January 1, 1952
Creator: Klinar, Walter J. & Healy, Frederick M.
Description: An investigation of a 1/24-scale model of the Grumman F9F-6 airplane has been conducted in the Langley 20-foot free-spinning tunnel. The erect and inverted spin and recovery characteristics of the model were determined for the normal flight loading with the model in the clean condition. The effect of loading variations was investigated briefly. Spin-recovery parachute tests were also performed. The results indicate that erect spins obtained on the airplane in the clean condition will be satisfactorily terminated for all loading conditions provided full rudder reversal is accompanied by moving the ailerons and flaperons (lateral controls) to full with the spin (stick right in a right spin). Inverted spins should be satisfactorily terminated by full reversal of the rudder alone. The model tests indicate that an 11.4-foot (laid-out-flat diameter) tail parachute (drag coefficient approximately 0.73) should be effective as an emergency spin-recovery device during demonstration spins of the airplane provided the towline is attached above the horizontal stabilizer.
Contributing Partner: UNT Libraries Government Documents Department
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