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Book Spin Investigation of a 1 29 Scale Model of the Republic Xf 91 Airplane with a Conventional Tail Installed

Download or read book Spin Investigation of a 1 29 Scale Model of the Republic Xf 91 Airplane with a Conventional Tail Installed written by Walter J. Klinar and published by BiblioGov. This book was released on 2013-06 with total page 40 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation has been conducted in the Langley 20-foot free-spinning tunnel of a 1/29-scale model of the Republic XF-91 airplane with a.conventional-tail arrangement installed. Previously, tests were made on the model with a vee tail installed. The erect spin and recovery characteristics of the model were determined for the normal loading with the wing installed at various amounts of incidence. The spin investigation also included inverted-spin tests, spin-recovery-parachute tests, tests with the center of gravity moved rearward, and tests with external fuel tanks added to the model. In addition, several tail.modifications were tested, on the model in an attempt, to improve the model's spin-recovery characteristics. The results indicate that any fully developed spin obtained on the airplane with the conventional tail installed will be satisfactorily terminated if rudder reversal is accompanied by moving the ailerons with the spin (stick right in a right spin).Decreasing the wing incidence from 6deg to -2deg should have a beneficial effect on the recovery characteristics of the airplane. Recovery characteristics by normal use of controls (full rudder reversal followed by moving the elevators down) will be satisfactory if the wing incidence, of the airplane is -2deg. Installation of external fuel tanks (with or without fuel) will have a somewhat adverse effect on the recovery characteristics of the airplane, but if the recovery technique includes movement of the ailerons to full with the spin, the spin rotation will be terminated rapidly. Varying the position of the center of gravity within the limits indicated to be possible on the airplane should not affect the recovery characteristic

Book Investigation of the Spin and Recovery Characteristics of a 0 057 Scale Model of the Modified Chance Vought Xf7u 1 Airplane

Download or read book Investigation of the Spin and Recovery Characteristics of a 0 057 Scale Model of the Modified Chance Vought Xf7u 1 Airplane written by Nasa Technical Reports Server (Ntrs) and published by BiblioGov. This book was released on 2013-07 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation has been conducted in the Langley 20-foot free-spinning tunnel to determine the spin and recovery characteristics of a 0.057-scale model of the modified Chance Vought XF7U-1 airplane. The primary change in the design from that previously tested was a revision of the twin vertical tails. Tests were also made to determine the effect of installation of external wing tanks. The results indicated that the revision in the vertical tails did not greatly alter the spin and recovery characteristics of the model and recovery by normal use of controls (fill rapid rudder reversal followed approximately one-half turn later by movement of the stick forward of neutral) was satisfactory. Adding the external wing tanks to cause the recovery characteristics to become critical and border on an unsatisfactory condition; however, it was shown that satisfactory recovery could be obtained by jettisoning the tanks, followed by normal recovery technique.

Book An Investigation of the Spin Recovery and Tumbling Characteristics of a 1 20 scale Model of the Northrop X 4 Airplane

Download or read book An Investigation of the Spin Recovery and Tumbling Characteristics of a 1 20 scale Model of the Northrop X 4 Airplane written by Lawrence J. Gale and published by . This book was released on 1950 with total page 27 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of the spin, recovery, and tumbling characteristics of a 1/20-scale model of the Northrop X-4 airplane has been conducted in the Langley 20-foot free-spinning tunnel. The effects of control settings and movements upon the erect and inverted spin and recovery characteristics of the model were determined for the model of loading conditions simulating various degrees of exhaustion of fuel in the airplane. An investigation was also made to determine the spin-recovery parachute requirements.

Book Free Spinning Tunnel Tests of a 1 24 Scale Model of the Mcdonnell Xp 88 Airplane with a Conventional Tail

Download or read book Free Spinning Tunnel Tests of a 1 24 Scale Model of the Mcdonnell Xp 88 Airplane with a Conventional Tail written by Theodore Berman and published by BiblioGov. This book was released on 2013-07 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation of the spin and recovery characteristics of a 1/24-scale model of the McDonnell XP-88 airplane has been conducted in the Langley 20-foot free-spinning tunnel. The effects of control settings and movements on the erect and inverted spin and recovery characteristics of the model in the normal loading were determined. Tests of the model in the long-range loading also were made. The investigation included tail-modification, spin-recovery parachute, pilot-escape, and rudder-pedal-force tests. Recoveries were generally satisfactory for spins in the normal loading provided the ailerons were not held against the spin. Satisfactory recoveries were obtained regardless of the aileron setting when the leading-edge flaps were deflected and normal recovery technique was used or when the horizontal tail was raised 70 inches, full scale. Recoveries were rapid from all inverted spins obtained. In the long-range loading with tanks on, it may be necessary to jettison the tanks in order to obtain recovery. A 12.0-foot spin-recovery parachute at the tail or a 4.0-foot parachute opened on the outer wing tip (drag coefficient of 0.66) was found to be effective for recoveries from demonstration spins. Test results showed that in an emergency the pilot should attempt to escape from the outboard side of the spinning airplane. The rudder-pedal forces in a spin were indicated to be within the capabilities of the pilot.

Book Lateral Stability Characteristics of a 1 8 33 Scale Powered Model of the Republic Xf 12 Airplane

Download or read book Lateral Stability Characteristics of a 1 8 33 Scale Powered Model of the Republic Xf 12 Airplane written by Edward Pepper and published by BiblioGov. This book was released on 2013-07 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt: The XF-12 airplane is a high-performance photo-reconnaissance aircraft designed for the Army Air Forces by the Republic Aviation Corporation. An investigation of a 1/8.33 - scale powered model was made in the Langley l9-foot pressure tunnel to obtain information relative to the aerodynamic design of the airplane. The model was tested with and without the original vertical tail. and with two revised tails. For the revised tail no. 1, the span of the original vertical .tail was increased about 15 percent and the portion of the vertical tail between the stabilizer and fuselage behind the rudder hinge line was allowed to deflect simultaneously with the main rudder. Revision no. 2 incorporated the increased span, but the lower rudder was locked in the neutral position. For all the tail arrangements investigated it was indicated that the airplane will possess positive effective dihedral and will be directionally stable regardless of flap or power condition. The rudder effectiveness is greater for the revised tails than for the original tail, but this is offset by the increase in directional stability caused by the revised tail. All the rudder arrangements appear inadequate in trimming out the resultant yawing moments at zero yaw in a take - off condition with the left-hand outboard propeller windmilling and the remaining engines developing take-off power.

Book Investigation of a 1 22 Scale Model of the Republic F 105 Airplane in the Langley 8 Foot Transonic Tunnel Lateral Directional and Additional Longitu

Download or read book Investigation of a 1 22 Scale Model of the Republic F 105 Airplane in the Langley 8 Foot Transonic Tunnel Lateral Directional and Additional Longitu written by A. A. Luoma and published by BiblioGov. This book was released on 2013-07 with total page 160 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA Technical Reports Server (NTRS) houses half a million publications that are a valuable means of information to researchers, teachers, students, and the general public. These documents are all aerospace related with much scientific and technical information created or funded by NASA. Some types of documents include conference papers, research reports, meeting papers, journal articles and more. This is one of those documents.

Book Spin tunnel Investigation of a 1 30 Scale Model of the Fighter and Reconnaissance Versions of the McDonnell F 4B Airplane

Download or read book Spin tunnel Investigation of a 1 30 Scale Model of the Fighter and Reconnaissance Versions of the McDonnell F 4B Airplane written by James Scarboro Bowman and published by . This book was released on 1969 with total page 29 pages. Available in PDF, EPUB and Kindle. Book excerpt: An investigation has been made on a model to determine the spin and spin-recovery characteristics of the fighter and reconnaissance versions of the McDonnell F-4B airplane. Tests were made for the combat loading for a range of center-of-gravity positions. Tests were also made to determine the effect of externally mounted wing stores and to determine the length of towline needed to place the canopy of the spin-recovery parachute sufficiently out of the wake of the airplane for satisfactory parachute operating characteristics.--P. 1.