[pfflier]

The Peacekeeper cold launch concept evolved in part from the "racetrack" basing mode using a mobile launcher. The Missile was ultimately configured for placement into existing Minuteman launch facilities keeping the cold launch capability.

The pads helped keep the missile body centered in lieu of the shock isolation suspension system used for Minuteman giving the added bonus of a reusable launcher which we then traded away during SALT negotiations.

[SaveFerris]

Looks like the Russkies use the pads for SS-25/SS-27 launches - they seem to spit pads too. I’ll have to look at the video again seems like ignition takes places once the missile has cleared the tube.