Engineering topics

Donlan, C. J.

Publications and source records attributed to Donlan, C. J..

31 records · Page 2

NASA NTRS1976

A comparison of the aerodynamic characteristics at transonic speeds of four wing-fuselage configurations as determined from different test techniques, 4 October 1960

The high speed aerodynamic characteristics of a family of four wing-fuselage configurations of 0, 35, 45, and 60 deg sweepback were determined from transonic bump model tests that were conducted in the Langley high speed 7 by 10 foot tunnel; sting supported model tests were conducted in the Langley 8 foot high speed tunnel and in the Langley high speed 7 by 10 foot tunnel, and rocket model tests were conducted by the Langley Pilotless Aircraft Research Division. A complementary study of the effect of Mach number gradients and streamline curvature on bump results is also included. The qualitative data obtained from the various test facilities for the wing-fuselage configurations were in essential agreement as regards the relative effects of sweepback and Mach number except for drag at zero lift. Quantitatively, important differences were present.

Donlan, C. J.↗

NASA NTRS1976

Characteristics of swept wings at high speeds, 30 January 1952

Some results of recent swept wing investigations are presented, that were undertaken to determine the effects of thickness and thickness distribution, camber and twist, nose-flap deflection, and devices or fixes for improving the wing pitching moment characteristics at high lift coefficients.

Donlan, C. J.↗

NASA NTRS1976

Project Mercury: the Program and Its Objectives

Project Mercury is reviewed in the light of experience gained thus far in the technical implementation of this Nation's initial program for manned orbital flight. Initial guidelines formulated for the Mercury program are reviewed, together with some of the technical considerations that have influenced the design of the capsule and the operational plan for the booster-capsule vehicle. The role of the astronaut in the Mercury program is discussed, and some observations are made concerning the impact of the Mercury program on future manned space ventures.

Donlan, C. J.↗

NASA NTRS1976

Guidelines for advanced manned space vehicle program, June 1960

A very broad mission objective was established; i.e., manned circumlunar flight and return to earth. It is implicit that the Saturn will be the primary propulsion system for this mission. The following attempts to: (1) define the objective so as to achieve as much capability in the vehicle as possible; (2) draw on Mercury experience to provide broad guidelines for vehicle performance and safety; (3) provide flexibility in the vehicle capability in the event that the manned lunar mission is proved to be subject to unacceptable risk in the target time period; and (4) indicate problem areas where work appears to be particularly needed.

Gilruth, R. R.↗

NASA NTRS1976

Proportioning the airplane for lateral stability

Proportioning for lateral aircraft control included: (1) directional stability (slope of curve of yawing moment coefficient against sideslip), and (2) effective dihedral factor (slope of curve of rolling moment coefficient against sideslip). Basic forces influencing the directional stability of aircraft are indicated. Propeller side force, basic fuselage yaw, and vertical tail side force contributed to yaw moment about center of gravity.

Donlan, C. J.↗

NASA NTRS1976

Progress Report on Project Mercury

Progress on Project Mercury, program for manned orbital space flight, is briefly reviewed. The original aims and concepts of the project are recounted. Various types of launch apparatus are mentioned along with safety factors.

Donlan, C. J.↗

NASA NTRS1971