Kampala- wrote:No lasers. No orbital doom grids. No station keeping.
It's truck mobile and it intercepts one HGV a rocket for places that are at the edge of the fixed-site defense bubbles. It's a small intercept vehicle with a alumina or synthetic diamond IR window that attacks HGVs at "reasonable" (IDK what this is) distance and is lofted by a Midgetman on launch-on-warning by a stacked TPY-2 or something.
How much delta-v is THAAD-ER supposed to have? The GBI thing was supposed to be 15 km/s or something like that but I'm not sure what entails, and it's double GBI's current delta-v AFAIK?
I don't know a lot about HGVs except old things like Lockheed AXE so I'm not sure what modern vehicles would be capable of, but I want to have a better than even chance of killing one. It doens't have to be The Best or whatever since Galla is fielding a fairly immature weapon against a fairly hypothetical threat (the interceptor HGV presumably exists in the oughties or maybe even late 90s) but it has to be something I guess.
Is it best if I give you an idea of the threat Galla is facing (or rather, thinks it's facing)? It's not fighting the actual USSR (this is really a lie, since Cyber Mongolians have ICBMs, but whatever) but more like Mega!Mitterrand. If Mitterrand were a diehard fascist.
The stats I used for my HGV are a CAV-H vehicle launched from a modified two-stage Trident-II type SLBM. Suborbital burnout would be at around 7-8 km/s at 200 kft altitude, a 3.0 L/D ratio would give a downrange travel of 10,000 plus kms with a 3,000 km crossrange capability.
GBI is about 8.3 km/s burnout with the new kill vehicle. 15 km/s would be over twice orbital speed and definitely not feasible. THAAD is 2.8 km/s so we can assume say 5.6 km/s for THAAD-ER, about the same as HEDI (mach 15-17 burnout IIRC). with the HGV entering its terminal dive at about 30 km /100 kft (ie the lowest point of its glide trajectory) and assuming a HEDI type interceptor your intercept range would be maybe 20-50 km.