Editing MGM-31 Pershing (section)

===Missile===
[[File:Pershing 1A destruction, 1989.JPEG|thumb|[[Thiokol]] solid-propellant motor]]
Two [[Thiokol]] solid-propellant motors powered the Pershing 1 missile. Since a solid-propellant motor cannot be turned off, the missile used [[thrust reversal]] and case venting for a selective range. Splice bands and [[Pyrotechnic fastener|explosive bolts]] attached the rocket motors. 
The missile was controlled by an analog guidance computer using a [[ball-and-disk integrator]] and a control computer. As directed by the onboard computers, the bolts exploded and ejected the splice band. Another [[Squib (explosive)|squib]] would open the thrust reversal ports in the forward end of the stage and ignite the propellant in the forward end, causing the motor to reverse direction. Testing found that the second stage would [[Slipstream|draft]] behind the warhead and cause it to drift off course, so explosive charges on the side of the motor opened the case and vented the propellant. The range could be graduated but the maximum was {{convert|740|km|nmi|-1}}. Jet vanes in the motor nozzles and air vanes on the motor case steered the missile. The onboard analog guidance computer and the [[Pioneer Instrument Company|Eclipse-Pioneer]] ST-120 (Stable Table-120) [[inertial navigation system]] provided guidance. The warhead could be conventional explosive or a [[W50 (nuclear warhead)|W50]] [[nuclear weapon]] with three yield options— the Y1 with 60 kiloton yield, Y2 with 200 kiloton yield and Y3 with 400 kiloton yield; the conventional warhead was never deployed.