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Henry Spencer Quotes


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Quotes by Henry Spencer

Showing 21-30 of 44 Quotes by Henry Spencer

Sometimes people wonder why aeroplanes are so cheap and rockets are so expensive. Even the most superficial comparison shows one obvious difference: aeroplane engines use outside air to burn their fuel, while rockets have to carry their own oxidisers along.

~Henry Spencer

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Liquid oxygen is one of the cheapest manufactured substances on Earth. In large quantities, it costs pennies per kilogram - cheaper than milk or beer.

~Henry Spencer

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Trying to build a spaceship by making an aeroplane fly faster and higher is like trying to build an aeroplane by making locomotives faster and lighter - with a lot of effort, perhaps you could get something that more or less works, but it really isn't the right way to proceed.

~Henry Spencer

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As plans for the first lunar landing started to be made, nobody had really thought about who would be out first.

~Henry Spencer

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The original specifications for Apollo navigation called for the ability to fly a complete mission, including a lunar landing, with no help from Earth - none, not even voice communications.

~Henry Spencer

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On the technical side, Apollo 8 was mainly a test flight for the Saturn V and the Apollo spacecraft. The main spacecraft system that needed testing on a real lunar flight was the onboard navigation system.

~Henry Spencer

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Speaking of photography, while the Apollo 8 crew shot hundreds of photos, there was one that got everybody's attention: a blue-and-white Earth rising over a gray moonscape.

~Henry Spencer

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In a small spacecraft, it was hard for the other two guys to sleep when the on-duty man was talking to Mission Control regularly.

~Henry Spencer

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Claiming that solid rockets are necessary for a heavy-lift launcher is obvious nonsense.

~Henry Spencer

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Large solid rockets have never been a very good way to build launchers that might have crews on top, especially because of the problems in getting the crew away from a failing launcher.

~Henry Spencer

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Biography

Nationality: Canadian

Type: Scientist

Born: Unknown

Links

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