There were no problems with Cassini's trajectory during the Titan fly-by. If Titan would have been much denser than assumed, there would have been serious alterations to it's trajectory. But none were measured, Cassini is still on the predicted trajectory.
And due to the high density of Titan's atmosphere, the parachutes performance is much less critical than on Mars.

All I can see in your writing is some numerology, but no evidence of any substance.

Harald

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"Flying in space is risky business, but just staying on this planet is risky business too." - John Young, astronaut