Regulus
First Submarine-Based Nuclear Missile

Explosive Power
up to 120 kt. (W5, fission) or 1900 kt. (W27, thermonuclear)
Hiroshima Equivalent Factor
8x to 126.6x
Dimensions
32 ft x 4 ft., 8 inches x 21 ft wingspan
Weight
13,685 lbs.
Year(s)
1955-1964
Range
575 miles (greatly reduced by radio control limits)
Purpose
Navy nuclear submarine attack capability
About Regulus
But Joe Milsap noticed. Milsap was there from the Vought Heritage Aircraft Foundation in Texas to make the final arrangements for the delivery of a Vought F6U Pirate fighter jet from the Connecticut Air Museum and Joe noticed the decrepit aircraft and knew it for the nuclear missile that it once was. The Regulus II was never deployed but it flew and it worked and it was made by the Chance Vought company and wow what a find.
The Connecticut museum donated the Regulus II to the retiree association and they restored it to its former beauty, now for all to see at the Frontier of Flight Museum at Dallas’ Love Field, its dark blue top and shining white bottom reflecting the wall of windows to its right.
The first Regulus, the Navy’s Regulus I, was the more beautiful, more accomplished cousin to the Army’s plain Jane Matador. Both looked like fighter jets but the more expensive (and so much better built) Regulus had numerous advantages over the Matador including a more advanced guidance system and, unlike the Matador, the Regulus had landing gear, just like a manned aircraft, that would deploy and the missile would touch down at an airstrip, ready to be flown again for further testing and training missions.
But the Regulus did not take off from airstrips. It took off primarily from one of the five submarines capable of firing the missile. They were often assigned to prowl the waters off the Kamchatka coast waiting for orders for Armageddon, the Soviet naval base along the coast perhaps the primary target. To fire the missile the sub would surface, prepare for launch, and then guide the missile via radio signal as it flew toward the Soviet naval complex near Petropavlovsk-Kamchatsky or some other near-shore target, the submarine unmoving on the surface, exposed all the while.
The Regulus II was less of a revision of the Regulus than a new missile. It could fly on its own after launch, allowing the sub to submerge as quickly as possible, and its greater range allowed the sub to stay at a safer distance during the time that it was on the surface.
Neither the Regulus I nor the Regulus II were envisioned as long-term solutions. The development of the Polaris missile, which launched from a submerged sub, proceeded more quickly than expected and its arrival did away with the need for both Regulus models. In 1958 the Regulus II project, tested and flown but never deployed, was canceled, and a few years later the Regulus I was withdrawn from service. The leftover Regulus I and Regulus II missiles gained a new life, however brief, as target drones.
There are very few survivors left of either missile.
When they dug the old Regulus II out of the mud they were astonished to find that two of the tires were still inflated, another needing only a small patch. And when they got back to Texas they discovered that the landing gear, once it was attached to a power supply, still worked, as good as new after all of this time, after all of this neglect.
Gallery










Nukemap
NUKEMAP is a web-based mapping program that attempts to give the user a sense of the destructive power of nuclear weapons. It was created by Alex Wellerstein, a historian specializing in nuclear weapons (see his book on nuclear secrecy and his blog on nuclear weapons). The screenshot below shows the NUKEMAP output for this particular weapon. Click on the map to customize settings.

Videos
Click on the Play button and then the Full screen brackets on the lower right to view each video. Click on the Exit full screen cross at lower right (the “X” on a mobile device) to return.
Further Reading
- Wikipedia, Federation of American Scientists, Designation Systems, SkyTamer
- Photos of a Regulus II found, out back in the weeds, at an aerospace museum in Connecticut.
- The development of the Regulus, “Blasts from the Past,” outlined by David K. Stumpf at the US Naval Institute’s page.
- A short history of the Regulus by Edward C. Whitman. The page appears to be a PDF scan from some other publication, perhaps Undersea Warfare Magazine?
- The Vought Heritage Foundation (the Chance Vought Company built the missile) has page of links to information on the Regulus.
- Captain Peter l. Fullinwider was the Executive Officer on the USS Tunny, one of the Regulus-capable submarines, and he recounts his experiences at the Naval Submarine League’s site.
- The blog Navel Gazing tells the story of the Regulus in submarine operations.
- Nuclear historian Alex Wellerstein helped out on a USS Gowler Exhibit (the Growler) was one of the Regulus subs) at the Intrepid Sea, Air, and Space Museum, New York City (where the USS Growler now resides) and shares his experiences.
- The Navy Nuclear Weapons Association has a page of images of Regulus “landings,” showing the crashed missiles. They have a number of other interesting pages including images of the the Regulus subs, images of the missile being loaded onto the subs, and manned aircraft guiding the Regulus in flight, among others.
- I’m a sucker for oddball histories such as, “This Nuclear-Capable 1950s Missile Once Delivered the U.S. Mail,” by Chris Cantle, at The War Zone.