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Arboga Robotmuseum

RB 321

Robothistoriska Föreningen i Arboga


Sidan uppdaterad: 2017-02-18 14:23







Missile History


V-1 bomb


Navy Test missiles


Air Force Test missiles


Saab Test missiles


Air-to-surface missiles


Ship-to-ship missiles


Coastal missiles


Surface-to-air missiles


Anti-tank missiles


Target missiles


Submunition dispenser


Missile summary table



RB 321 at the Technical Museum


RB 321 was the designation for an air-to-air missile project, intended for the J 35 aircraft. Two versions of the missile (B/C) were developed for testing that lasted from the year 1949 to 1956. The design work began in 1948. Test firings took place at the Karlsborg Missile Test Site (RFK), using a rocket launcher and 44 tests were carried out by dropping the missile from J 29 B aircraft, “The Flying Barrel”.


RB 321 was equipped with nose control surfaces and wings with vertical winglets and ailerons at the aft part of the wing. The control system worked with a compressed air driven guidance unit with three air-driven gyroscopes, giving fault signals to four pneumatic control servos (one each for yaw and altitude and two for the roll control) These units were developed  and manufactured at the SAAB Plant in Jönköping. The control signals were sent from an active acquisition radar. This unit was developed by FOA ( Swedish Defence Research Agency) and was manufactured by the Swedish Radio Co. (SRA) . The unit was built entirely around electronic tubes.



·        Wave length 10 centimeter, Pulse emitting radar with a peak power of50 kW and 50 W average power. Bearings received from a skewed, rotating parabolic disc aerial. Disc aerial reflecting diameter 10 inches  (25 centimeter).

·        Range towards an aircraft 1.9  3.7 miles    (3 - 6 kilometer).

·        Apart from the actual acquisition radar electronics there was also an analogue target calculator for a modified Pure Pursuit steering.


The test missiles were controlled by pre-programmed clockwork. In the 321B version electrical rudder servos were used. a film camera and a telemetering facility registered the separation phase and the following flight pattern.


The RB 321 project was discontinued in 1962 in favour for the Sidewinder and the Falcon missiles. The missile 321 was later on modified to a ground-to-air missile with two ram motors and one booster rocket. (Designation RB 322)


Main Data (RB 321 C)




12 feet 5 inches

(3,790 m)


1 foot 8 inches

(0,500 m)

Wing span

10 inches

(0,255 m)


550 lbs

(250 kg)

Nominal Velocity

M 2.5


Booster rocket

KR 19 C



6,450 lbf during 3.1 sec

(28.700 N during 3,1 s)




Missile types:


RB 301


RB 302


RB 303


RB 304A


RB 304B


RB 321


RB 322