Apollo 11's leap into the unknown - 13 Minutes to the Moon Season 1, Episode 8

Apollo 11's leap into the unknown - 13 Minutes to the Moon Season 1, Episode 8 - BBC World Service

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@LaPabst 2 ай бұрын

Love this stuff, I'm 65 and I was very much alive as this all happened in real time. You can't appreciate history as it happens, it becomes more amazing as time passes.

@AndrewBlacker-t1d 6 ай бұрын

The irony... Our family was driving from Cody, Wyoming back to Chicago during this descent phase. Mom all but twisted the knobs off the am radio trying to find and keep a radio station so we could listen to coverage. "Communications were lousy!" We got to Badlands National Park, and Dad got out his high quality radio from the camper and found a solid station. It got dark out, moon was bright, and we were surrounded by the peaks of the Badlands (that looked like the moon)... while astronauts were crawling out of the LM. It's a night I will never forget.

@shivamduhan7700 5 ай бұрын

thats amazing, I completely agree about the moonlike quality of badlands. i went there this winter and reached there at night after driving for hours through a fierce snowstorm listening to chris hadfield's an astronaut's guide to life on earth. i was the only one there in a 100 mile radius on a full moon night after 6 ft of fresh snow, it truly felt like i was driving on the moon.

@SalyLuz-hc6he Жыл бұрын

Wonderful! Thank You for posting this great series!

@TheDoomCJ 2 жыл бұрын

i love

@patinduru Жыл бұрын

Awesome podcast 👍

@BBCWorldService 3 жыл бұрын

Watch the series here: kzbin.info/aero/PLz_B0PFGIn4f0xYPhOk0wIASOYE8-1Wbz

@AndrewBlacker-wr2ve Жыл бұрын

Eagle is heading down faster than anticipated... P63 is a program that fires the descent engine based upon ALL data concerning positioning of the LM after it left the CM. P63 needs the IMU data to know how to calculate and steer the LM to the selected landing area. The reason cited for Eagle going "long" downrange is excess pressure in the tunnel between the CM and the LM. As I said above... Why doesn't P63 recognize that the LM is moving down too rapidly from the 'get go?" The LM IMU only had ONE job to do: keep track of Inertial Movement to feed accurate data to P63. Did it not detect the "pop" and acceleration? Instead, P63 starts as if everything for the recent 45 minutes is based upon perfect IMU calculations. Why have the IMU, or P63 if the don't/can't update based upon real time data?

@kbabioch Жыл бұрын

Probably it's more complicated than reported here. But your questions are totally valid, would like to get some answers.

@AndrewBlacker-wr2ve Жыл бұрын

@@kbabioch A lot of things said in this series don't make sense. And I'm not accusing the producers of knowingly deceiving us... but rather, better quality control.

@bitesofmathematics4356 9 ай бұрын

Initially the full thrust of the descent engine is well below the level to deccelerate at all during descent, and it only gains that ability as fuel is burnt. Thus it must at first increase speed as it descends, before later slowing down. This was anticipated. I have read that it was lunar gravity variations, or mass-cons that contributed to an excess of speed above the expected. However during early P63 the engine is already at full thrust and can't supply any more of the needed thrust to bring the speed in line with expectations. The business about the pressurisation of the tunnel linking the command and lunar modules, is relevant only if it saved a bit of fuel ie. the lunar module then had an initial mass, prior to PDI, exceeding expectations. Note for P63 the mass ( and for that matter the centre of mass ) is estimated ( by dynamical response ) rather than known precisely. For instance the lunar module had probably another 30 seconds of fuel beyond what was quoted to the crew by Houston. The only way we'll ever know for sure is to go up there and measure the remaining fuel in the descent stage! In any event it turned out to be good luck as the target area was full of bloody boulders, so going long wasn't all bad.

@bitesofmathematics4356 9 ай бұрын

Please note that Don Eyles ( the P63 programmer ) has written a book, called "Sunburst and Luminary", which deals with all of this.