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Originally Posted by Jerry
Hamlet has pointed out that the deployment time of the 2.9 meter parachute was an egg-timer function: Based upon the time at which Huygens reached the proper velocity to release the 8 meter parachute.
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Egg timer? What I pointed out was that the entire deployment sequence starts with the detection, by the CASU, of the desired acceleration. The drogue chute pulls of the aft cover. A few seconds later the main chute is deployed and slows down the probe below subsonic speed. About 30 seconds later the heat shield is jettisoned. 15 minutes later the main chute is jettisoned and the stabilizer chute takes Huygens the rest of the way.
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I have pointed out many times that if the upper atmosphere was thinner, and the force of gravity greater, Huygens would plunge faster to a much lower altutide before popping the main parachute.
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You've asserted this many times without any evidence. How much lower? How much faster? How did Huygen's heat shield handle the increased heat load?
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The higher speed and lower deployement offset each other, resulting in a deployment time vary near the expected value, but at a much lower altitude.
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Your scenario sounds like one of Kipling's "Just So" stories. Everything adjusted itself to look like the original predictions, yet operated under "Jerry physics".
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In order for the 2.9 meter parachute to deploy at all without slamming into Titan, this deployment would have had to occur at an extremely low altitude, literally meters above the surface, and it would have resulted in an immediate rapid acceleration just before hitting the moon.
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You said the heat shield was jettisoned 100 meters above the surface. This is 30 seconds after main chute deployment and 15 minutes before stabilizer deployment.
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You can see this rapid acceleration in the last five seconds of the velocity plot extracted from the ESA's radar audiogram.
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Really? How did you determine this. How did you analyze the
compressed radar. What technique did you use. What assumptions did you make?
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The time of landing is a sore spot.
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Yes, a sore spot for your fantasy.
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I know the penetrometers were designed to store the impact data and release it when ask for it - I know the computer would not have even been polling for the penetrometer data until it was convinced that the probe had landed, and I know it would have likely to continued to interpret the other accelerometer data as indicative that the probe was still airborn until the time-at-altitude table timed out.
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You
know these things? How? Did you read the post by Elias concerning the TAT?
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Every one, who has sat down with me and looked at the overlays from the Huygens image set can see that the images are of a dynmically changing scene of an explosive crater formation - they can see the venting lines along the seams, the central gathering ring of the heat blanket, and the way that the image of flailing electrical umbellical that was attached to the heat shield dynamically changes with swing of Huygens on the parachute...
This is such a great puzzle!
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You've yet to explain how the thin Mylar blanket could survive entry and what an electrical harness was doing attached to the heat shield and how it survived entry.