Jump to content

Apollo 11 Flight Plan


Recommended Posts

So, in order to try out some mods (most notably 1/10th RSS) I have decided to recreate the Apollo 11 launch, the only problem is I have no idea what orbital inclination they launched into. I've tried googling this, and the only thing i can find is that the third stage (which was used to circularize) was used to get them to the Moon. As I understand it they DID NOT perform a plane change maneuver prior to this, and only changed their orbit to adjust from a free return to a lunar insertion.

any clarification would be greatly appreciated.

Edited by Taki117
Link to comment
Share on other sites

Given that the Moon's orbit is pretty much in the plane of the ecliptic, ideally the inclination would be 23.4 degrees. But given that Kennedy Space Center is at 28 degrees North, that would seem to be the minimum inclination of an orbit from a direct launch. Not sure if they made any inclination change after achieving orbit.

Link to comment
Share on other sites

Not sure if they made any inclination change after achieving orbit.

Which is what I'm trying to figure out. Did they time the launch so that they could adjust their obit during the circularization burn, or did they perform a plane change maneuver in LEO?

Link to comment
Share on other sites

Orbital inclination for the initial parking orbit was 32.521° with an apogee of 100.4nm and a perigee of 98.9nm. There was no on-orbit inclination change prior to TLI. The absolute best source for Apollo mission numbers is Richard Orloff's Apollo By the Numbers, which NASA hosts on their historical webpage.

Link to comment
Share on other sites

I don't think there was a separate circularization burn like we do in KSP, it was one continuous burn from the surface (aside from brief interruptions during staging). The third stage wasn't relit until the trans-lunar injection burn. (Was very difficult not to write "munar" there).

Edit: Ninja'd, and with a reference!

Link to comment
Share on other sites

Why would they need to make a plane change burn? They just time their launch to get the right inclination such that the Moon-relative AN/DN is at the same place as their trans-lunar ejection burn and Moon encounter.

Link to comment
Share on other sites

Orbital inclination for the initial parking orbit was 32.521° with an apogee of 100.4nm and a perigee of 98.9nm. There was no on-orbit inclination change prior to TLI. The absolute best source for Apollo mission numbers is Richard Orloff's Apollo By the Numbers, which NASA hosts on their historical webpage.

Thank you! That's all I needed. Now to go do an Apollo Mission! Have some Rep.

Link to comment
Share on other sites

  • 5 months later...
This thread is quite old. Please consider starting a new thread rather than reviving this one.

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...