Eric Laithwaite

Eric Roberts Laithwaite (14 June 1921 – 27 November 1997) was an electrical engineer, principally known for his development of the linear induction motor and Maglev rail system.

Biography

Eric Roberts Laithwaite was born in Atherton, Lancashire, on June 14 1921, raised in the Fylde, Lancashire and educated at Kirkham Grammar School, he joined the Royal Air Force in 1941. Through his service in World War II, he rose to the rank of Flying Officer, becoming a test engineer for autopilot technology at the Royal Aircraft Establishment in Farnborough.

On demobilization in 1946 he attended the University of Manchester to study electrical engineering. His work on the Manchester Mark I computer earned him his master's degree. His subsequent doctoral work started his interest in linear induction motors. He became professor of heavy electrical engineering at Imperial College London in 1964 where he continued his successful development of the linear motor.

In the 1980s, he was involved in creating a device to extract energy from sea waves (see patent GB2062114); although the technology was successful in trials, it could not be made storm proof, hence it never became a commercial success.

Laithwaite was an able communicator who made many television appearances. Memorable among these were his Royal Institution Christmas Lectures to young people in 1966 and 1974. The latter of these made much of the surprising phenomena of gyroscopes.

In 1974, Laithwaite was invited by the Royal Institution to give a talk on a subject of his own choosing. He decided to lecture about gyroscopes, a subject in which he had only recently become interested. His interest had been aroused by an amateur inventor named Alex Jones, who contacted Laithwaite about a reactionless propulsion drive he (Jones) had invented. After seeing a demonstration of Jones's small prototype (a small wagon with a swinging pendulum which advanced intermittently along a table top), Laithwaite became convinced that "he had seen something impossible". In his lecture before the Royal Institution he claimed that gyroscopes weigh less when spinning, and to demonstrate this he showed that he could lift a spinning gyroscope mounted on the end of a rod easily with one hand, but could not do so when the gyroscope was not spinning. At this time, Laithwaite suggested that Newton's laws of motion could not account for the behavior of gyroscopes, and that they could be used as a means of reactionless propulsion. The members of the Royal Institution rejected his ideas, and his lecture was not published. (This was the first and only time an invited lecture to the Royal Institution has not been published.)

Despite this rejection, and despite the fact that Laithwaite later acknowledged that gyroscopes behave fully in accord with Newtonian mechanics, he continued to explore gyroscopic behaviour, maintaining the belief that some form of reactionless propulsion could be derived from them. Laithwaite set up Gyron Ltd with William Dawson and in 1993 applied for a patent entitled "Propulsion System". See US5860317, GB2289757 and WO9530832 for the US, UK and pct application for patents respectively. A United States Patent, Number 5860317, was granted in 1999.

Although Laithwaite is best known for his ideas concerning gyroscopes, he also held an idea concerning moths. It was that they communicate via ultra short wave electromagnetic phenomena (Inventor in the Garden of Eden, E R Laithwaite 1994 page 199). He persisted in this belief even after the pheromone, which they actually use, had been isolated [Details?] and could even be bought 'over-the-counter' — which seems to go against his account. However he himself had argued (1960, see below and [1]) that there must be two different mechanisms for detecting pheromones: (i)The orthodox account of chemical-gradients (effective only at short-range), and (ii)Some method for long-distance detection (>"100 yards") even when the wind was in an unfavourable direction — and the only credible solution then had to be electromagnetic, (probably infrared). This explanation did not account for where the necessary energy might come from — a matter later taken up by P.S.Callahan, though he too suffered considerable controversy (largely due to all contestants overlooking Laithwaite's "(i)/(ii)" distinction). Anyway, present indications are that the energy comes from fluorescence effects whereby the pheromone molecules near the female act as a cloud of infrared beacons (invisible to us humans) while these same molecules also act as the conventional concentration-gradient for any nearby male-moths; (Traill, 2005[2], 2008[3]).

Laithwaite also had a habit of championing the ideas of amateurs over those of experts. Such ideas included the ones that there are 3 types of magnetism, and that the '196 problem' is not a problem: terminating after relatively few iterations (in fact, the current count runs to millions of iterations - with no sign of termination).

Laithwaite retired from Imperial College in 1986, but was offered no other research post until 1990, when he became Visiting Professor at Sussex University. He was persuaded by George Scelzo of PRT Maglev Systems in Chicago, to submit a proposal to NASA for an electromagnetic launch assist track originally inspired by John Mankins of NASA. He died within weeks of the contract being awarded. The initial stage has been successfully continued by William Dawson and the contract with PRT for this development is still active. The track uses both levitation coils and linear induction motors, and it can be seen in the "Magnets" episode of Modern Marvels on the History channel.

He was also a keen entomologist and the co-author of The Dictionary of Butterflies and Moths (1975); he had one of the finest British collections of specimens. He married, in 1951, Sheila Gooddie; they had two sons and two daughters.

Published works

Articles

• A Radiation Theory of the Assembling of Moths The Entomologist, June-July 1960, vol.93(1166-1167), pp. 113-117, 133-137 +plate(III)
• The multiplication of bananas by umbrellas Electrical Review, 20th-27th Dec. 1974, pp. 822-824
• The bigger they are, the harder they fall Electrical Review, 14th Feb. 1975, pp. 40-42
• 1975 - A space odyssey Electrical Review, 28th Mar. -- 4th Apr. 1975, pp. 398-400
• Roll Isaac, roll - Part I Electrical Review, Vol. 204, No. 7, 16th Feb. 1979, pp. 38-41
• Roll Isaac, roll - Part II Electrical Review, Vol. 204, No. 11, 16th Mar. 1979, pp. 31-33
• Give us a sign Electrical Review, Vol. 207, No. 3, 18th Jul. 1980, pp. 40-42
• "Gaze in wonder: an engineer looks at biology", (1988), Speculations in Science and Technology, vol.11(4), 341-345.
• The influence of Michael Faraday on power engineering. Power engineering journal, Vol.5, No. 5, Sept. 1991, pp. 209–219

Books

• Propulsion without wheels (1965)
• Induction machines for special purposes (1966)
• The engineer in wonderland (1967) — The Royal Institution of Great Britain Christmas lectures, 1966/67. With illustrations, including a portrait.
• The linear motor and its application to tracked hovercraft (1971)
• Linear electric motors (1971)
• Experiments with a linear induction motor (1971)
• Exciting electrical machines (1974)
• All things are possible: an engineer looks at research and development (1976)
• Transport without wheels ed. (1977)
• How to invent (1977) co-authored by M.W. Thring
• Why does a glow-worm glow? (1977) illustrated by Mike Jackson
• Electric energy: its generation, transmission and use (1980) co-authored by L.L. Freris
• Engineer through the looking glass (1980)
• Invitation to engineering (1984)
• Shape is important (1986)
• Force: a basic ingredient (1986)
• A history of linear electric motors (1986)
• Using materials (1987)
• Size is vital (1987)
• An inventor in the Garden of Eden (1994)

Honours

• S. G. Brown Medal of the Royal Society (1966)
• Nikola Tesla Award of the Institute of Electrical and Electronics Engineers
• Fellow of Imperial College London (1991)
• Honorary Fellow of the Institution of Electrical Engineers (1992)

Bibliography

• "Eric Laithwaite defies Newton", New Scientist, November 14, 1974, p470

External links

• Obituary
• NASA Breakthrough Propulsion Physics Project: COMMON ERRORS: Gyroscopic Antigravity a NASA page discussing Laithwaite's demonstration.
• The Foster-Miller Maglifter project, which has a picture of their linear motor subscale system.
• The Royal Institution’s 1974-75 Christmas Lecture video
• This is the Heretic program about Eric Laithewaite towards the end of his career. It explains the battle he had trying to get the scientific community to accept or even investigate his ideas.
• Repetition of Laithwaite's experiments, with explanations
• "How Popperian positivism killed a good-but-poorly-presented theory — Insect Communication by Infrared". Ondwelle: Melbourne. (Dec.2005) — a critique of a "debate" over insects and infrared, in which Laithwaite was cited, and yet partly ignored!
• "Critique of the 1977 debate on infra-red 'olfaction' in insects — (Diesendorf v. P.S.Callahan)"; Conference of the Australian Entomological Society; at Orange, NSW, (30 September 2008).