AGM-12 Bull Pup

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SKU:
RW-BULL-PUP
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  • Bull Pup AGM-12B in flight on an F39-6 to 678 ft
  • Bull Pup Options: AGM-12B's 3 motor 24-13-13 mm cluster, and AGM-12D's single 29mm motor with integrated motor retainer
  • AGM-12B on the pad with a single F39-6
  • AGM-12B 2D schematic
$29.99

Description

Rocketry Works' Bull Pup series is the most accurate flying scale model of the Bull Pup available! 2 of the 4 planned variants available now, and in time, Rocketry Works' designs will include all 4 production variants of this popular kit, currently in BT-80 (66mm or 2.6 inch) airframe diameter. Other scale sizes are possible in the future, as well. With 3D printed parts and laser cut plywood fins, this kit makes a great addition to a scale model collection. Unique features in Rocketry Works' Bull Pup designs include:

  • 2 scale-accurate tail cone designs--a 29mm motor mount round profile on the AGM 12-C, D, and E, or the AGM-12B's diamond-shaped profile, with its unique 24mm + 2 x 13mm cluster motor configuration
  • Integrated motor retainer in both of the tail cone configurations
  • Dado slots on the 3D printed nose cone to permit accurate scale positioning of the forward canard fins

Decals are not yet available, but we are working on sourcing them.

In time, Rocketry Works will release all 4 variants, and additional airframe sizes. The forward fins on this model require additional nose weight. Be sure to use the included nose weight to move the CG far enough forward of the CP.

 The Bull Pup was used to soften air defense installations during the Vietnam war, used as an air to surface missile against ground defenses.  The aircraft pilot guided the Bull Pup missile to its target using a small joystick in the cockpit, flying a line-of-sight path behind the missile, and visually determining missile attitude using 2 flares burning on either side of the liquid fuel exhaust.  The accuracy did not match the tactical demand, and the pilot was at risk of anti aircraft fire while guiding the missile to target. The small 250 lb high explosive warhead on the AGM-12B also limited the effectiveness against hardened targets.  Other variants included the AGM-12C, with a 1000 lb semi armor piercing warhead, the AGM-12D's W45 nuclear warhead, and the AGM-12E's cluster munition.

Model  Motor Mount   Tail Cone   Fin Shape   Historical Notes   Model Notes   
AGM-12B   24mm + 2 x 13mm cluster   Diamond   Clipped Delta  Conventional high explosive 250 lb warhead   Can fly 24mm alone; recommend cluster: D12-3 + 2 x A10-0T   
AGM-12C   29mm   Round   Trapezoid   Semi-armor piercing 1000 lb warhead   Not yet available
AGM-12D   29mm   Round   Clipped Delta   W45 Nuclear warhead. Larger than AGM-12B   Can fly 24mm motors using a 24mm-29mm motor adapter   
AGM-12E   29mm   Round   Trapezoid   Cluster munition variant of AGM-12C   Not yet available

 

 

 

Important Note about Stability

You will need to add weight to the nose in order to maintain stability of this rocket. Be sure to model your upgraded kit and add nose weight to ensure your model's center of gravity (CG) is at least 1 airframe diameter forward of the center of pressure (CP).  You'll find an example Rocksim files below to start your modeling, but you should override values with your as-built CG and CP prior to final determination of stability before flight. You're likely to need at least 25 grams of nose weight to stabilize this model for use with most low power and mid power configurations, so watch your launch velocity to make sure your heavier rocket is leaving the pad between 15 meters/second and 25 meters/second.

Adding Nose Weight

The No. 9 lead shot available as nose weight must be secured inside the tip of the nose cone with epoxy. The 25 gram mass included with the kit is sufficient for most low power and mid power configurations; if you plan to fly motors larger than F power, make sure to model your configuration to ensure that your CG is at least 1 caliber forward of your CP and increase nose weight as needed. Invert the nose cone and pour a bit of epoxy into the tip. We recommend 30 minute epoxy for this task so you have time work add epoxy and shot alternately until all the shot is embedded in epoxy.  Then, use a paper funnel to pour the lead shot into the nose cone so it lands in the epoxy. pour enough to cover the epoxy puddle fully; the lead shot will sink into the epoxy over the next several minutes Add more epoxy, then more shot, until all the shot is in the epoxy. The shot will continue to sink into the epoxy before the epoxy hardens.  After working with lead shot, be sure to wash your hands and surfaces, as it is not something you or those around you should ingest. The epoxy envelops the lead shot so it is not a hazard once it is encased in epoxy.

Recommended Motors

Rocketry Works has flown test flights on each of these motors in the designated models with the specified amount of nose weight. Depending on the motor, you can likely fly a compatible motor in another model. For example, performance will be largely the same with a 24mm E30 motor in either the AGM-12B or AGM-12D with a 24mm - 29mm motor adapter in the AGM-12D's 29mm motor mount.

Model  Motor SelectionMeasured Altitude   Optimal Delay   Notes   
AGM-12B    D12-3 201 ft 2.8 seconds Eject 6 ft and 0.8 seconds past apogee
AGM-12B   D12-3 + 2 x A10-0T   285 ft 3.0 seconds Eject at apogee
AGM-12B  E12-4 + 2 x A10-0T   500 ft (simulated) 3.6 seconds (simulated) Not verified in flight yet
AGM-12B E30-4

609 ft

4.5 seconds Eject 21 ft and 0.7 seconds before apogee
AGM-12B  F39-6 678 ft 5.2 seconds Eject 13 ft and 0.3 seconds before apogee
AGM-12D F52-5 923 ft 5.6 seconds Eject 19 ft and 1.5 seconds before apogee (altimeter measured an ejection delay of 4 seconds on this flight);
Chute Release helped prevent zippering with the early deployment.

 

Product Documentation

Video assembly instructions are available in the Videos tab.

Simulation Files

rocksim-logo.jpg Bull Pup 12-B Design File

 

 

rocksim-logo.jpg Bull Pup 12-D Design File
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Additional Information

Length:
68.6 cm (27 inches)
Diameter:
66 mm (2.6 inches)
Mass (with 25 grams nose weight):
310 grams (10.93 ounces)
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