Jump to content

SpaceX Discussion Thread


Skylon

Recommended Posts

1 minute ago, Gargamel said:

What makes the mylar (?) shroud around the second stage engine (not the nozzle though) pulse like that?

Vibration?

 

Unrelated:

There's always that little ring of ice that drifts past S1...

Link to comment
Share on other sites

Just now, tater said:

Vibration?

I don't think so, it's diminished as it's increased altitude.   It looks like a rhythmic pulsing of some off gas.   So the air pressure early on collapses the shroud, giving the gas pulses more effect.  Later on the shroud is inflated, and you can't notice them as much. 

Link to comment
Share on other sites

2 minutes ago, Gargamel said:

I don't think so, it's diminished as it's increased altitude.   It looks like a rhythmic pulsing of some off gas.   So the air pressure early on collapses the shroud, giving the gas pulses more effect.  Later on the shroud is inflated, and you can't notice them as much. 

I see what you mean now about the pulsing. Still there, but lower frequency maybe.

Link to comment
Share on other sites

5 minutes ago, tater said:

I see what you mean now about the pulsing. Still there, but lower frequency maybe.

I wonder if it isn't Merlin still gimballing under the passive control system. It's no longer useful, but nobody bothered with turning it off, because it irrelevant anyway.

Link to comment
Share on other sites

20 hours ago, Scotius said:

I wonder if it isn't Merlin still gimballing under the passive control system. It's no longer useful, but nobody bothered with turning it off, because it irrelevant anyway.

I don't think so, it's too rhythmic, and this is during the burn, so it wouldn't be irrelevant.    (Clarifying: I'm referring to the second stage mylar shroud)

Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

×
×
  • Create New...