DavidEC wrote:Ah, fair enough, I was thinking of more conventional bombers - then in your example the problem is how much will a fully operational Valkyrie fleet cost versus a fleet of SSBNs with equivalent firepower?
Lets do the maths. A Trident D-5 can throw between 1 and 14 warheads depending on range and configuration. A B-70 Valkyrie can carry between 1 and 25 depending on configuration and defensive armament. So, lets equate one Valkyrie to one Trident D-5.
A Trident D-5 costs US$56.5 million each.
The "today" cost of a Valkyrie is hard to estimate but assuming they are mass production articles we can estimate their price at around US$475 million each (roughly 1/3 the cost of a B-2). So, on paper, we can buy 8.4 Trident D-5 missiles for the cost of one Valkyrie.
Only, we must think systems, not weapons. To deploy the Trident D-5 we need an Ohio class SSBN, today-cost US$3.2 billion dollars. It carries 24 missiles so the per-missile cost of that submarine is US$133 million. The cost of an airfield capable of handling a single bomb group (72UE) of Valkyries is US$500 million, a per-aircraft cost of US$6.9 million.
Therefore the immediate system cost of the Trident D-5 is US$189.8 million. The immediate system cost of the Valkyrie is US$481.9 million. This reduces the cost differential to 2.5 missiles for one Valkyrie.
Now we add in comamnd control and systems cost; these are hard toa ssess but the command network for the SSBNs is very expensive. Nuclear Weapons Audit put it at roughly three times the cost of the submarine; no figure for an airbase is available but its much less so lets assume its three times the cost of the base (its probably much less). That gives us US$9.6 billion per submarine as opposed to US$1.5 billion for the base ful of bombers. Per missile that's US$400 million, per aircraft its US$20.8 million.
So, our final SYSTEM cost balance is US$589.8 million for the Trident D-5 and US$502.7 million for the Valkyrie. In other words, on a unitized delivery basis, the Valkyrie fleet is 15 percent cheaper than the Trident D-5 fleet.
Valkyries have more vulnerable bases I imagine, though and they need them considering their lesser endurance.
The Valkyrie actually has less vulnerable bases. Why? because it can be launched at the first sign of trouble and sent on its way. If it was a mistake or a false alarm or the enemy ruins the fun by surrendering, they can turn around and come back. If the enemy hits the base, its empty. A ballistic missile cannot be turned around, aborted or retargeted. Once fired, it will hit its target unles sits shot down. So we have to be very sure what is happening before we light the blue touchpaper and retire to a safe distance. That emans (in effect) we have to have warheads initiating on our territory before we can fire. So the base structure has to be very solid and secure.
As to endurance, a B-70 can be refuelled in mid-air to extend its endurance as much as necessary. A Trident D-5 has an endurance that's exactly equal to the time it takes to reach its target. No more, no less.