Air Launch Spaceplanes: any published supersonic separation analysis?

FutureSpaceTourist

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Many proposed air-launched spaceplanes have the carrier aircraft below the space vehicle. Eg Soviet Spiral, Bristol Spaceplanes spacecab & spacebus, ALSV, Bell BoMi, British EAG.4413/4396, interim HOTOL + An-225, <insert your favourite design concept here> ...

Some of these propose separation at supersonic (or even hypersonic?) speeds. I've often wondered how practical/achievable that would be. Does anyone know of any published analysis of separation issues for any particular spaceplane designs/proposals?

I've found some interesting discussions on air launch (eg http://selenianboondocks.com/2008/01/orbital-access-methodologies-part-i-air-launched-ssto/) but focus obviously tends to be subsonic.

Only Secret Projects discussion I've found is the following on subsonic ALSV separation. Apologies if I've missed something else.

Orionblamblam said:
Michel Van said:
how solve Boeing the Problem with Shuttle&Tank not hitting 747 Empennage after separation ?

The RL-10 rocket engines in the tail of the 747 would help get the 747 into a high-angle climb. At separation, two RL-10's on the Sortie woudl fire (the outboard ones, in order to miss the 747 tail with their exhaust), and the 747 would immediately dive. Think of it as a 747/Shuttle separate, but with thrust on the Shuttle. Since the separation occured at subsonic speed, there'd be little worry of unfortunate shock impingement.

P.S. I'm a newbie here, so hope this is an appropriate place to ask! Thanks.
 

XP67_Moonbat

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Hey Tourist,

Welcome aboard and try this on for size. It's a paper on hypersonic weapons separation. Not exactly what you really need but it's a good start. Get a load of page 8.

http://handle.dtic.mil/100.2/ADA318744

Maybe this might also be of help:
http://ntrs.nasa.gov/archive/nasa/casi.ntrs.nasa.gov/20080000856_2007039070.pdf

Another good thing to go back and look into is the case of the D-21 drone. IIRC, it separated from it's M-21 mothership at Mach 3.

The Air Force Beta I & II studies are another good one

Moonbat
 

FutureSpaceTourist

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Hi Moonbat,

Thank you for the great pointers. I thought there had to be something relevant! Looks like I've got some serious studying to do now ;D

Thanks again,

Tourist
 
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