A Quote by Henry Spencer

Solid-fuel rockets can't easily be shut down on command.

Henry Spencer

Quote Topics

Command Down Easily Fuel Rockets Shut Solid

Quote Author

Henry Spencer
Canadian - Scientist
Born: 1955

Whether solid rockets are more or less likely to fail than liquid-fuel rockets is debatable. More serious, though, is that when they do fail, it's usually violent and spectacular.

Henry Spencer

Past experience, on the shuttle and the Titan rockets, suggests that large multi-segment solid rockets have a probability of failure of 0.5 to 1 per cent.

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

Food is your body's fuel. Without fuel, your body wants to shut down.

Ken Hill

Supplying fuel for a Mars expedition from the lunar surface is often suggested, but it's hard to make it pay off - Moon bases are expensive, and just buying more rockets to launch fuel from Earth is relatively cheap.

Henry Spencer

The people of Mississippi can't just go home, shut down their small business, shut down their restaurants, shut down their gyms... and just think that you can come back six weeks from now, flip a switch and everything's gonna be fine. That's not the way the economy works.

Tate Reeves

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

Henry Spencer

Where the foreign exchange is not available, we are cutting down our operations. For example, we had a vegetable oil refinery; we have shut it down. We had a tomato-based processing plant; we have shut it down.

Aliko Dangote

Leaders, if you allow wonder to shut down in you, you will shut it down in everyone around you.

Andy Stanley

Don't underlook the Sixties; we started eating more vegetables, respecting women, and we shut down Vietnam. We did a lot of good stuff. But it shouldn't shut you down from the moment.

Wavy Gravy

If you increase the number of rockets you build and you buy, then it's the scale of the economy, the price is going to come down. It may not come down in order of magnitude, but if several commercial ventures start being successful and there becomes a bigger market for these rockets, the price will naturally come down a bit. That's why I think Excalibur Almaz, we're a little bit unique in that we don't look at our so-called competition with disdain, we want them to succeed and it needs to have more than one player. Even if we are successful, we couldn't handle the entire market ourselves.

Leroy Chiao

For so long, companies were run using a command-and-control, 'top down' hierarchical method that involved dictating down the command chain and maintaining order. What I've witnessed in our time is evolving democratization, a shift to a demand economy accelerated by technological advancements like social media.

Kevin Allen

The government shut down 12 times under Democratic House Speaker Tip O'Neill. It was only shut down twice while I was speaker.

Newt Gingrich

I love what I do so much, and I have a very acute understanding of how I work as a person, so if I'm afraid, I shut down and can't do anything. If I'm overwhelmed, I shut down and can't do anything.

Anya Taylor-Joy

You can't embrace your whole life if you're shut down. I found out that I can't just run away and shut down. I'm losing the rest of my life doing that.