Fred Weldon Leslie is an American scientist who flew on the NASA STS-73 Space Shuttle mission as a payload specialist.

Background

Leslie was born on December 19, 1951, in

Ancón, Panama Ancón is a corregimiento in Panamá District, Panamá Province, Panama with a population of 29,761 as of 2010. Its population as of 1990 was 11,518; its population as of 2000 was 11,169. It is sometimes considered a suburb or small town within P ...

. He is an instrument rated

commercial pilot A commercial pilot licence (CPL) is a type of pilot licence that permits the holder to act as a pilot of an aircraft and be paid for their work. Different licenses are issued for the major aircraft categories: airplanes, airships, balloons, glid ...

with more than 900 hours in various

aircraft An aircraft is a vehicle that is able to flight, fly by gaining support from the Atmosphere of Earth, air. It counters the force of gravity by using either Buoyancy, static lift or by using the Lift (force), dynamic lift of an airfoil, or in ...

. Leslie graduated from Irving High School,

Irving, Texas Irving is a city in the U.S. state of Texas. Located in Dallas County, it is also an inner ring suburb of Dallas. The city of Irving is part of the Dallas–Fort Worth metroplex. According to a 2019 estimate from the United States Census Bureau ...

, in 1970, then received a

Bachelor of Science A Bachelor of Science (BS, BSc, SB, or ScB; from the Latin ') is a bachelor's degree awarded for programs that generally last three to five years. The first university to admit a student to the degree of Bachelor of Science was the University o ...

degree in

engineering science Engineering physics, or engineering science, refers to the study of the combined disciplines of physics, mathematics, chemistry, biology, and engineering, particularly computer, nuclear, electrical, electronic, aerospace, materials or mechanical en ...

from

The University of Texas The University of Texas at Austin (UT Austin, UT, or Texas) is a public research university in Austin, Texas. It was founded in 1883 and is the oldest institution in the University of Texas System. With 40,916 undergraduate students, 11,075 ...

in 1974, and a

master's degree A master's degree (from Latin ) is an academic degree awarded by universities or colleges upon completion of a course of study demonstrating mastery or a high-order overview of a specific field of study or area of professional practice.

and

Doctor of Philosophy A Doctor of Philosophy (PhD, Ph.D., or DPhil; Latin: or ') is the most common Academic degree, degree at the highest academic level awarded following a course of study. PhDs are awarded for programs across the whole breadth of academic fields ...

degrees in

meteorology Meteorology is a branch of the atmospheric sciences (which include atmospheric chemistry and physics) with a major focus on weather forecasting. The study of meteorology dates back millennia, though significant progress in meteorology did not ...

with a minor in

fluid mechanics Fluid mechanics is the branch of physics concerned with the mechanics of fluids ( liquids, gases, and plasmas) and the forces on them. It has applications in a wide range of disciplines, including mechanical, aerospace, civil, chemical and bio ...

from the

University of Oklahoma The University of Oklahoma (OU) is a Public university, public research university in Norman, Oklahoma. Founded in 1890, it had existed in Oklahoma Territory near Indian Territory for 17 years before the two Territories became the state of Oklahom ...

in 1977 and 1979, respectively. Leslie served on the

American Institute of Aeronautics and Astronautics The American Institute of Aeronautics and Astronautics (AIAA) is a professional society for the field of aerospace engineering. The AIAA is the U.S. representative on the International Astronautical Federation and the International Council of ...

Fluid Dynamics In physics and engineering, fluid dynamics is a subdiscipline of fluid mechanics that describes the flow of fluids— liquids and gases. It has several subdisciplines, including ''aerodynamics'' (the study of air and other gases in motion) an ...

Technical Committee, he is a member of the

American Meteorological Society The American Meteorological Society (AMS) is the premier scientific and professional organization in the United States promoting and disseminating information about the Atmospheric sciences, atmospheric, Oceanography, oceanic, and Hydrology, hydr ...

Tau Beta Pi The Tau Beta Pi Association (commonly Tau Beta Pi, , or TBP) is the oldest engineering honor society and the second oldest collegiate honor society in the United States. It honors engineering students in American universities who have shown a ...

Chi Epsilon Pi Chi Epsilon Pi () (Also known as XEP) is a national honor society for outstanding students in the field of meteorology/atmospheric sciences. The purpose of the society is mainly twofold: to serve as a means for awarding distinction to students wh ...

, and the

United States Parachute Association The United States Parachute Association (USPA) is a private sports governing body for the sport of skydiving in the United States. Its headquarters are located in Fredericksburg, Virginia. The USPA's roots go back to the National Parachute Riggers ...

. He holds a

World Record A world record is usually the best global and most important performance that is ever recorded and officially verified in a specific skill, sport, or other kind of activity. The book ''Guinness World Records'' and other world records organization ...

as a participant in the 200 person freefall formation set October 1992.

Academic career

After Leslie earned his Ph.D. in 1979, he served as a post doctoral research associate at

Purdue University Purdue University is a public land-grant research university in West Lafayette, Indiana, and the flagship campus of the Purdue University system. The university was founded in 1869 after Lafayette businessman John Purdue donated land and money ...

studying fluid

vortex In fluid dynamics, a vortex ( : vortices or vortexes) is a region in a fluid in which the flow revolves around an axis line, which may be straight or curved. Vortices form in stirred fluids, and may be observed in smoke rings, whirlpools in th ...

dynamics. In 1980, he worked for the

Universities Space Research Association The Universities Space Research Association (USRA) was incorporated on March 12, 1969, in Washington, D.C. as a private, nonprofit corporation under the auspices of the National Academy of Sciences (NAS). Institutional membership in the assoc ...

as a visiting scientist at the

Marshall Space Flight Center The George C. Marshall Space Flight Center (MSFC), located in Redstone Arsenal, Alabama (Huntsville postal address), is the U.S. government's civilian rocketry and spacecraft propulsion research center. As the largest NASA center, MSFC's first ...

(MSFC).

NASA career

Leslie began work for NASA in 1980 as a research scientist in the

Space Science Laboratory Space is the boundless three-dimensional extent in which objects and events have relative position and direction. In classical physics, physical space is often conceived in three linear dimensions, although modern physicists usually conside ...

at the Marshall Space Flight Center. Since 1983, he has served as a co-investigator for the

Geophysical Fluid Flow Cell Geophysics () is a subject of natural science concerned with the physical processes and physical properties of the Earth and its surrounding space environment, and the use of quantitative methods for their analysis. The term ''geophysics'' some ...

experiment which examines

spherical A sphere () is a geometrical object that is a three-dimensional analogue to a two-dimensional circle. A sphere is the set of points that are all at the same distance from a given point in three-dimensional space.. That given point is the ce ...

rotating

convection Convection is single or multiphase fluid flow that occurs spontaneously due to the combined effects of material property heterogeneity and body forces on a fluid, most commonly density and gravity (see buoyancy). When the cause of the convec ...

relevant to the

atmosphere An atmosphere () is a layer of gas or layers of gases that envelop a planet, and is held in place by the gravity of the planetary body. A planet retains an atmosphere when the gravity is great and the temperature of the atmosphere is low. A s ...

s of

star A star is an astronomical object comprising a luminous spheroid of plasma (physics), plasma held together by its gravity. The List of nearest stars and brown dwarfs, nearest star to Earth is the Sun. Many other stars are visible to the naked ...

s and

planet A planet is a large, rounded astronomical body that is neither a star nor its remnant. The best available theory of planet formation is the nebular hypothesis, which posits that an interstellar cloud collapses out of a nebula to create a you ...

s. The experiment flew on Spacelab 3 and is also a part of the United States

Microgravity The term micro-g environment (also μg, often referred to by the term microgravity) is more or less synonymous with the terms ''weightlessness'' and ''zero-g'', but emphasising that g-forces are never exactly zero—just very small (on the I ...

Laboratory-2 (USML-2) payload. Leslie was a principal investigator for the Fluid Interface and Bubble Experiment examining the behavior of a rotating free surface aboard NASA's

KC-135 The Boeing KC-135 Stratotanker is an American military aerial refueling aircraft that was developed from the Boeing 367-80 prototype, alongside the Boeing 707 airliner. It is the predominant variant of the C-135 Stratolifter family of transpo ...

aircraft flying low-gravity trajectories. He is an author on 27 journal papers, 45 conference papers, and nine NASA reports involving atmospheric and fluid dynamic phenomena. Leslie also worked in the MSFC Neutral

Buoyancy Buoyancy (), or upthrust, is an upward force exerted by a fluid that opposes the weight of a partially or fully immersed object. In a column of fluid, pressure increases with depth as a result of the weight of the overlying fluid. Thus the p ...

Simulator as a suited subject and safety diver supporting procedure tests for extra-vehicular activity. In 1987, he became chief of the Fluid Dynamics Branch where he directed and conducted research in both laboratory and theoretical investigations along with more than a dozen scientists in the Branch. He was also the mission scientist for Spacelab J ( STS-47) coordinating more than 40 domestic and Japanese experiments in fluid dynamics,

crystal A crystal or crystalline solid is a solid material whose constituents (such as atoms, molecules, or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions. In addition, macros ...

growth, and

life science Life is a quality that distinguishes matter that has biological processes, such as signaling and self-sustaining processes, from that which does not, and is defined by the capacity for growth, reaction to stimuli, metabolism, energy t ...

during the 8-day mission. Leslie is a researcher at the Marshall Space Flight Center. He is a member of the research team analyzing data from the Geophysical Fluid Flow Cell experiment that flew on STS-73/ USML-2.

Spaceflight

Leslie flew as a payload specialist on STS-73 launched on October 20, 1995 and landed at the

Kennedy Space Center The John F. Kennedy Space Center (KSC, originally known as the NASA Launch Operations Center), located on Merritt Island, Florida, is one of the National Aeronautics and Space Administration's (NASA) ten field centers. Since December 1968 ...

on November 5, 1995. The 16-day mission aboard

Space Shuttle Columbia Space Shuttle ''Columbia'' (OV-102) was a Space Shuttle orbiter manufactured by Rockwell International and operated by NASA. Named after the Columbia Rediviva, first American ship to circumnavigate the upper North American Pacific coast and the ...

focused on materials science,

biotechnology Biotechnology is the integration of natural sciences and engineering sciences in order to achieve the application of organisms, cells, parts thereof and molecular analogues for products and services. The term ''biotechnology'' was first used b ...

combustion Combustion, or burning, is a high-temperature exothermic redox chemical reaction between a fuel (the reductant) and an oxidant, usually atmospheric oxygen, that produces oxidized, often gaseous products, in a mixture termed as smoke. Combusti ...

science, and fluid physics contained within the pressurized Spacelab module.

External links

*
Spacefacts biography of Fred W. Leslie
{{DEFAULTSORT:Leslie, Fred W. 1951 births Living people University of Oklahoma alumni People from Irving, Texas NASA civilian astronauts Commercial aviators Space Shuttle program astronauts