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thrownthatwaytoday at 7:16 AM2 repliesview on HN

90 minutes is a low earth orbit period.

A suborbital craft won’t be travelling at that speed.


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m4rtinktoday at 9:59 AM

Like, you could do a partial orbit & then drop down over the destination. But it would need much more delta-v & an orbital class heat shield.

It was proposed as nuclear warhead delivery method though: https://en.wikipedia.org/wiki/Fractional_Orbital_Bombardment...

pfdietztoday at 11:44 AM

Unless a suborbital trip is nearly at orbital velocity, it will involve a high, arcing trajectory. This will make the deceleration at the end unacceptably (lethally) high for all but short arcs. Some of the Mercury suborbital missions involved deceleration of 15 gees, if I recall correctly.

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