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... of the first things was that the descent engine was supposed to be able to throttle from maximum thrust for the initial braking phase where you needed all that thrust, to ... us the maximum thrust, but they couldn’t throttle it from maximum thrust down to about 60 percent, but then they could throttle it continuously from 60 percent down to 10 percent ... , there were more subtle changes, I guess, like the thing that the engine wouldn’t throttle from 100 percent down. That changed things. But it was mostly in the fuel-efficient ...

... at the time, would be to maintain manual control of attitude and automatic control of throttle through the final descent from an altitude of somewhere between 500 and 1000 feet until such time as the automatic throttle rated descent was unsatisfactory, at which time we'll go full manual on the throttle . . flying it in a manner like a normal ...

... National Laboratory, and American Nuclear Society. United Technology Corp. announced development of new technique for throttling rocket engines involving use of helium mixed with liquid fuel. Depending on ratio of gas ... of research and advanced technology, William J. Corcoran, pointed out that a practical method of throttling liquid rocket engines had never before been attained. Decision on whether NASA or USAF would ...

... engine tapes, too, to make sure they were still running. Then get into 3G gravity throttling, and I remember I had my books, of course, they were all tethered, but I had them Velcroed on the wall. Under 3G throttling you start getting heavy, and I heard the Velcro of this one book start to ... tethered.” I was going to reach out and grab it, but we were under 3G throttling, and the last thing I wanted to do was to bump a switch. I said ...

... of things. And during the descent, there was a call for when the engine would throttle down, and we had some telemetry parameters that would help us predict that, so the ... burn, they would start the engine at 10 percent, and they would throttle it up, and they would throttle it up some more. We could not model that sequence in the computer ...

... you didn’t—we wanted enough fuel remaining in the descent engine that when he throttled up, he would get a positive rate of climb and start up before we had ... the airplane. I was on the right side, like the copilot. And I had my throttle and control stick. '''Ward:''' Of course you’re not seated. You’re standing. '''Duke:''' We ... way we had trained. But if he had a problem with his control stick or throttle, I’d take over and he’d perform the secondary role. Well, it turned out ...

... on the LLRV/TV that would allow the engine to gimble. We had an auto throttle on it so that we’d weigh the vehicle at a thousand feet in the ... actually had a weighing capability to weigh it itself. Once it weighed itself, it would throttle the engine to 5/6ths the weight of the vehicle. We had drag compensation so ... to represent the descent engine. Then he would control that descent engine with his T-throttle and control the attitude with the actual LM controller that I had modified and put ...

... .5-sec duration, firing through a diffuser used for altitude simulation when production engines were throttled in testing. Engine 0002, a flight configuration that would not be flown, was a developmental ... for the Space Shuttle program. NASA planned to fire each engine on the A-2 throttling test position before using it on a Shuttle flight. Stand A-1, the sea-level ...

... of external tank self-pressurization; engine-prestart requirements, such as pressure and temperature milestones; starting, throttling, and cutting off the engine, using external-tank propellants with the engines operating in close ... nozzles; and firings 9 through 13 would have the 35:1 nozzles reaffixed for engine throttling, to demonstrate the effect on flight profiles. Although the main engine had taken the blame ...

... conducted in a separate program. The Shuttle engines were gimbaled (steered) during the test firing, throttled in stages from 100 % of rated thrust down to 65 %. The Shuttle would have the first human-rated engines capable of throttle control during flight. ( MARSHALL SPACE FLIGHT CENTER MSFC Release 80-79) April 1980 April May ...

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