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Wednesday, July 31, 2019

"A much unsung hero of the Apollo Program"

In case you missed it (you were living on the moon, you fell into the Kola Superdeep Borehole and had to climb out, your shady travel agent sold you a fabulous spelunking excursion at the Great Pit of Carkoon, or you somehow managed to be completely disconnected from civilization for the month of July), we Earthlings celebrated the 50th anniversary of stomping on the moon's face this month.

It's easy enough to practice touch-and-goes on the Earth: just show up at the airport with some cash burning a hole in your pocket and they'll let you turn that into burning avgas instead.

But what if you're an astronaut? Obviously you can't rent a lunar trainer from the FBO. In that case, NASA designed an apparatus designed to simulate lunar landings. In the video below from the Smithsonian Channel, you can watch Neil Armstrong have to use the 1960s equivalent of the Cirrus CAPS parachute system as the trainer has a malfunction and Armstrong ejects.


Although the video doesn't say why the trainer went out of control, a NASA page about it says that "a loss of helium pressure caused depletion of the hydrogen peroxide used for the reserve attitude thrusters." Basically, it would be like losing the brakes in your car: once you start going in one direction, nothing is going to stop you. Time to use your ejector seat.

NASA then goes on to quote Armstrong:
"(The LM) Eagle flew very much like the Lunar Landing Training Vehicle which I had flown more than 30 times….  I had made from 50 to 60 landings in the trainer, and the final trajectory I flew to the landing was very much like those flown in practice. That of course gave me a good deal of confidence – a comfortable familiarity."  Summarizing its usefulness to the Apollo training program, Armstrong said:  "It was a contrary machine, and a risky machine, but a very useful one."  All prime and backup Moon landing commanders completed training in the LLTV, and those who landed a LM on the Moon attributed their success to this training.
One final quote sums up how there is no substitute for being able to practice: "Dubbed the 'flying bedstead,' the ungainly contraption is 'a much unsung hero of the Apollo Program,' according to Apollo 8 astronaut Bill Anders."


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The author is an airline pilot, flight instructor, and adjunct college professor teaching aviation ground schools. He holds an ATP certificate with ERJ-145 and DHC-8 type ratings, as well as CFI, CFII, MEI, AGI, and IGI certificates, and is a Master-level participant in the FAA's WINGS program and a former FAASafety Team representative. He is on Facebook as Larry the Flying Guy, has a Larry the Flying Guy YouTube channel, and is on Twitter as @Lairspeed.

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