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02-January-2008, 04:02 PM
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They had balsa wood impacters filled with freon.
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02-January-2008, 04:25 PM
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Only the seismometer assembly was intended to survive the Ranger landing, which was highly energetic. "Soft-landing," in aerospace parlance, does not cover impactors, so it is quite wrong to say that any part of a Ranger spacecraft was intended to soft-land. However it is equally wrong to say that no part of the Ranger spacecraft (well, on some models) was expected to survive impact. Part of Ranger's mission was to collect seismic data from the lunar surface post-landing.
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02-January-2008, 04:40 PM
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Hypothetically. So they land a repeater or Ranger on the moon with it's radar. Then put two in orbit. Such as Ranger 5 and Ranger 3. Plausible?
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02-January-2008, 05:03 PM
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The Ranger spacecraft bus could transmit enough bandwidth for television but the seismometer impactors themselves could not. A television transponder would have to be soft-landed because it would be too large and sophisticated to survive an unbraked impact.
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03-January-2008, 04:33 PM
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Quote:
Actually Triple Plus Tough MG1962A! Any sufficiently equipped radio station on earth could acquire the Doppler shift of the signal and match it to the needed velocity profile for a spacecraft to land on the Moon. Assuming an unmanned probe did this than this craft needed to mimic the exact (and well known) delta-v scheme of a manned landing. The Russians certainly followed this Doppler shift and with an educated guess about delta-v capability of the Lem and CM stack concluded that indeed a craft landed safely on the Moon. Extracelestial
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Any sufficiently advanced technology is indistinguishable from magic - Arthur C. Clarke
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03-January-2008, 06:58 PM
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Addendum
Quote:
a craft with a different mass and engine (i.e. delta-v) than the CM/LEM stack would hardly produce the same Doppler shift as the CM/LEM stack. The obvious answer of a CTer would be that this can't be verified as no-one ever in person was there to testify that indeed Apollo and not Ranger flew to the moon ;-)
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Any sufficiently advanced technology is indistinguishable from magic - Arthur C. Clarke
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