Re: N-1 "Stabilization Screens" (Wuz: Re: shuttle LOX line vs Saturn V LOX lines)



OM wrote:
...Just exactly *how* did those "stabilization screens" work,
aerodynamically speaking? They sort of go against what we'd expect to
find on a rocket - read: fins - and I've always wondered how these
came about on the N-1 design, and whether any other booster had
anything similar.

Comrade! Hero aerodynamic stabilization fins!
What they are is a box-like structure divided into many rectangular compartments with the individual rectangles being separated by vertical walls in a diamond arrangement, sort of like the flow stabilizer grid one finds on the front of a electric house fan.
It's a clever design, as although the overall size of the grid box is small, when you tally up all the surface area of the vanes that make it up, it equals a good-sized fin.
They also are used on the four swing-out stabilizers on the Soyuz/ Zond escape system: http://www.xpda.com/junkmail/junk162/GPN-2002-000178.jpg
....the SS-20 missile: http://www.fas.org/nuke/guide/russia/theater/rt-21m_3.jpg
....the SS-23 missile: http://www.aeronautics.ru/archive/wmd/ballistic/ballistic/ss23_003.jpg ....and the AA-12 AAM: http://warfare.ru/image.aspx?img=0702ey70/update/jan2005/5/rvv-ae3.jpg
Here's a shot of them in a folded position on the N1: http://www.aerospaceweb.org/question/spacecraft/russia/n1-1.jpg
While I was looking for that, I came across a big knockout piece of artwork of the Soviet LOK lunar orbiter spacecraft, which would serve the same function as the Apollo CSM: http://www.buran.ru/images/jpg/lok-1.jpg


Pat
.

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