Again, let’s see the Lunar-Module ( LM ) descent capabilities. Bob B. in this forum says: “NASA did have an anti-gravity device of sorts, the LM's rocket engine. While in lunar orbit the spacecraft was moving only about 1.6 km/s, which is many times less than a spacecraft in Earth orbit. The LM's engine could easily provide enough propulsion to slow from 1.6 km/s to a soft landing on the Moon. You must also realize that the LM was made as lightweight as possible and burned up about half its initial mass in propellant during the descent. Furthermore, the Moon's surface gravity is only 1/6th that of Earth. As the LM approached the lunar surface its weight in lunar gravity was less than 3,000 pounds. It therefore required no more than 3,000 pounds of thrust to allow it to hover over the surface and gently touchdown. The LM's descent engine was capable of producing a maximum thrust of 10,000 pounds, thus it was throttled down to about 30% thrust for the landing. From a rocketry standpoint, a landing on the Moon was well within the capability of 1960s technology. “
People may or may NOT believe Lunar-Module ( LM ) has such magical power. On the lunar orbit, as the Lunar-Module began to separate from the Command-Module and set out for the historical expedition of lunar surface, it had the initial speed of 1.6km/s, and it was falling to the moon, this falling object was also simultaneously influenced by velocity. Bob B. says: “ The LM's engine could easily provide enough propulsion to slow from 1.6 km/s to a soft landing on the Moon. “ ; “ Furthermore, the Moon's surface gravity is only 1/6th that of Earth. As the LM approached the lunar surface its weight in lunar gravity was less than 3,000 pounds. It therefore required no more than 3,000 pounds of thrust to allow it to hover over the surface and gently touchdown. “. Hey! Bob! Is that your conclusion? “ With the initial speed of 1.6km/s plus velocity, the Lunar-Module’s rocket engine still could easily provide enough propulsion to slow down itself, result in soft landing on the surface of the Moon. Before the moment that LM started so-called “ hover over the surface and gently touchdown “, the LM was completely near the status of floating upon the lunar surface, its speed reduced to about 0 km/s.
The LM was not unmanned space vehicle. It had to host two astronauts. If so-called “ hover over the surface and gently touchdown “ was the real situation, NASA had to conduct numerously rigorous experiments and tests on Earth before the Apollo missions to make sure that LM’s rocket engine could do the job, then allowed so many participants or even civilians to witness some progress of those experiments and tests. If test results showed the LM’s rocket engine could definitely do the job, there would be so many participants and civilians shocked by this great technological leap forward. Those people would not hide their admiration and have to tell the story, and NASA would voluntarily or involuntarily have to release this breaking news to the press. The big question hereby shows up: “ Did anyone see those experiments and tests? “ The answer is quite clear: “ No. “ Another question could show up subsequently: “ Why did nobody see? “ The answer could vary. Maybe NASA never accomplished this kind of great technological leap forward so there is no way conducting numerously rigorous experiments and tests on Earth. Maybe some technological progress had been made, but NASA was unable to simulate the environments which were similar to that of lunar orbit. Without simulated environments, any experiment and test would result in inaccuracy, uncertainly, and bias; therefore, it is not worthy to conduct experiments and tests on Earth environments. One thing is for sure. NOBODY EVER SAW THE DESCENT CAPABILITIES OF LUNAR MODULE ON EARTH; THEREFORE, NOBODY WAS CERTAIN THAT LUNAR MODULE’S ROCKET ENGINE COULD DO THE JOB WHILE ON THE LUNAR ORBIT.
So NASA would not put two astronauts into Lunar-Module and descent to lunar surface. Lunar-Module was merely a toy. It was about to cheat. All three astronauts of Apollo 11 remained in the Command-Module. They could possibly reach the Moon on schedule but only on the orbit of the Moon. None of the three astronauts ever landed on the surface of the Moon.
My dear Bob, don’t you ever worry this great crusade was still a little dangerous, a little uncertain, and a little worthless? The Lunar-Module was NOT fully tested. It could NOT be used for landing. Try to have some logics. If you had been that big boss, the decision maker, Would you have been really willing to gamble your men’s life? The American love their astronauts. NASA spends billions of dollars on training these astronauts. They are so precious. They can’t just die out there. If anyone dies out there, this tragedy will certainly disgrace NASA as well as U. S. national prides.
-unfinished. Please wait for another part.