Pratt Hobbies, Inc.
Rocketry Catalog
 Innovative Launch Systems and Accessories
for Model Hobbyists
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Contrail 54mm 28in Motor System

Details 

Contrail 54mm 28 inch long hybrid motor hardware system. Includes all four nozzles (slow, med/fast, XFast, XXFast), forward bulkhead and two injector assemblies (standard and XXFast).
Price: $340.00
Out of Stock

 

Details 

Single use reload kit for the Contrail Rockets 98mm hybrid motor system.
Price: $200.00
Out of Stock

Contrail Rockets K630 Reload Kit

Details 

One fuel grain and parts for the CR-75-1400 Contrail motor casing set with Medium nozzle and Mini combustion chamber. Tripoli certified as K630. Sparky fuel composition.
Price: $75.00
Out of Stock

Contrail 54mm K234 Reload Kit

Details 

One K234 reload for Contrail 54mm hybrid motor. Includes injector orifice, fill line, igniter. Requires 48 in. 54mm casing with Slow nozzle and single port injector.
Price: $44.00
Out of Stock

Contrail 54mm K555 Reload Kit

Details 

One K555 reload for Contrail 54mm hybrid motor. Includes injector orifices, fill lines, igniter. Requires 48 in. 54mm casing with X-Fast nozzle and three port injector.
Price: $54.00
Out of Stock

D-Region Tomahawk

Details 

Our favorite rocket, back by popular demand in a new version that is ideal for beginners and classrooms! 13 inches long, 3/4 inch diameter.

This kit does not include a rocket motor or launch equipment. We recommend A6-4, A8-3  or B6-4 motors for the Tomahawk.

Available in bulk packs of 5 or more at a discount price!

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Price: $6.50

Contrail 54mm J292 Reload Kit

Details 

One J292 Sparky reload for Contrail 54mm hybrid motor. Includes injector orifice, fill line, igniter. Requires 28 in. 54mm casing with Slow nozzle and single port injector.
Price: $44.00
Out of Stock

Contrail 54mm J272 Reload Kit

Details 

One J272 reload for Contrail 54mm hybrid motor. Includes injector orifice, fill line, igniter. Requires 36 in. 54mm casing with Slow nozzle and single port injector.
Price: $44.00
Out of Stock

Contrail 54mm K265 Reload Kit

Details 

One K265 Sparky reload for Contrail 54mm hybrid motor. Includes injector orifice, fill line, igniter. Requires 48 in. 54mm casing with Slow nozzle and single port injector.
Price: $44.00
Out of Stock

Contrail 54mm J416 Sparky reload kit

Details 

One J416 Sparky reload for Contrail 54mm hybrid motor. Includes injector orifice, fill line, igniter. Requires 36 in. 54mm casing with Medium nozzle and single port injector.
Price: $44.00
Out of Stock

Contrail 54mm 36 inch Motor System

Details 

Contrail 54mm 36 inch long hybrid motor hardware system. Includes all four nozzles (slow, med/fast, XFast, XXFast), forward bulkhead and two injector assemblies (standard and XXFast).
Price: $360.00
Out of Stock

Contrail 54mm 48 inch Motor Hardware System

Details 

Contrail 54mm 48 inch long hybrid motor hardware system. Includes all four nozzles (slow, med/fast, XFast, XXFast), forward bulkhead and two injector assemblies (standard and XXFast).
Price: $380.00
Out of Stock

 

Details 

54mm, 28 inch long motor casing for Contrail hybrid motors. No internal parts or nozzles are included.
Price: $95.00

 

Details 

54mm, 36 inch long motor casing for Contrail hybrid motors. No internal parts or nozzles are included.
Price: $115.00
Out of Stock

 

Details 

Graphite nozzle to fit Contrail Rockets 54mm motor hardware. Specify Slow, Med/Fast, XFast, or XXFast.
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Price: $35.00
Out of Stock

Contrail Rockets 152mm Hybrid Motor Hardware

Details 

Complete 152mm(6 inch) diamater, 15000 cc Motor Hardware System.
Price: $2,495.00
Out of Stock

 

Details 

54mm, 48 inch long motor casing for Contrail hybrid motors. No internal parts or nozzles are included.
Price: $135.00
Out of Stock

Sten-Bot 4 Wheeled Robot Kit

Details 

The Sten-Bot is a fully programmable kit for a four-wheeled rover.

  • Rocker suspension system
  • IR receiver, control it with a TV remote!
  • Arduino or BASIC interpreter
  • Requires simple hand tools and 4 AA batteries 
  • Now with robot arm!
Price: $200.00

Jensen Model #60 Steam Engine

Details 

The Jensen Model #60 Steam Engine is completely assembled and tested at the factory. This is an excellent first steam engine, easy to operate. Includes whistle and safety valve, and a starter supply of dry fuel tablets. We include cylinder oil and a squeeze bottle to make filling the boiler easy.

Special Introductory Price valid through January 1, 2015! 

List Price: $182.95
Price: $165.00

Standard Ejection Canisters, 25-pack

Details 

The SEC-5B Ejection Canisters feature a snap-top ejection charge container that holds 1.5 grams of black powder or smokeless powder. The single-use Ejection Canisters are convenient and reliable methods of deploying your recovery system.

Bulk pack of 25 Standard Ejection Canisters at a discount price. 

IMPORTANT: Fill the Ejection Canister completely with black powder. Use 3FG powder or finer; 4FG is best. Powder MUST touch the igniter for reliable ignition. Black powder can "bridge" or clump, so tap the Canister and look carefully to make sure the powder is in contact with the filament in the base.

 

Price: $39.50

GO BOX Launch System

Details 

The GO BOX is a simple, inexpensive system that will fire any igniter. It uses any 12 volt battery (or your car battery with the optional cigar lighter plug) to provide plenty of power. The system comes with a 25 foot cable that plugs into the control box. Extensions are available. Optional Launch Tripod launching pad.
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Price: $44.95

CANSAT Kit Model 2.0

Details 

The Rev 2 CANSAT kit is an update of the original with the USB integrated into the processor board, a terminal block for connecting a battery, and a power switch. The UART port has been updated for full UART signal access and a new connector has been added to provide access to two PWM ports for controlling servos. The sensor board has been updated with a new pressure sensor and two sensor expansion ports. The kit is compatible with the previous version. Lesson material has been rewritten.

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Price: $199.00

Sten-Bot 4 Wheeled WIFI Controlled Robot Kit

Details 

The Sten-Bot is a fully programmable kit for a four-wheeled rover controllable by any WIFI equipped computer.

  • Rocker suspension system
  • WIFI module for computer control
  • Robotic gripper
  • Arduino or BASIC interpreter
  • Requires simple hand tools and 4 AA batteries 
Price: $200.00

Standard Ejection Canisters, 5-pack

Details 

The SEC-5B Ejection Canisters feature a snap-top ejection charge container that holds 1.5 grams of black powder or smokeless powder. The single-use Ejection Canisters are convenient and reliable methods of deploying your recovery system.
Price: $10.00

Jensen Model #65 Steam Engine

Details 

The Jensen Model #65 is a double-acting Slide Valve steam engine. Ready to run, with whistle and throttle. Beautifully polished and mounted on a cast metal stand. Jensen includes a funnel and a starter supply of dry fuel. We include a squeeze bottle for filling the boiler and special cylinder oil.

Introductory discount price good through January 1, 2015! 

List Price: $205.95
Price: $189.00

Universal Launch System 2.0, Module 1 Baseblock

Details 

The Universal Launch System 2.0 Baseblock Module is a versatile system that controls three conventional launch pads.  It will fire solid propellant rocket motors, single or cluster, of any size. An external battery provides 12 volts to the igniters through relays that can handle 40 amps. Add the ULS-M2 Valve Manifold and you're flying hybrid motors. The Baseblock includes a redesigned handheld controller, an internal digital voltmeter, and a standard 50 foot cable. Extension cables are readily available.
Price: $149.95

Jensen Model #75 Steam Engine

Details 

The Jensen Model #75 is Jensen's largest dry fuel heated design. The #75 is a double acting slide valve engine with a Stephenson reversing linkage with forward, reverse and neutral positions.

Introductory pricing good until January 1, 2015 

List Price: $228.95
Price: $206.00

Arduino Experimenter's Kit

Details 

The Arduino Experimenter's Kit will get you started building devices with the Arduino operating system. Complete instructions are included, along with:

  • solderless breadboard
  • jumpers
  • USB cable
  • ultrasonic range sensor
  • 3 LEDs
  • speaker
  • IR receiver
  • photocell 
Price: $80.00

Large Ejection Canisters, 5-pack

Details 

Large Ejection Canisters are about half again as big as the standard SEC-5a Ejection Canisters. They hold about 2.5 grams of black powder (not included). They are suitable for rockets of 4 to 5.5 inches in diameter. Each Canister has the resistance written on the side, so you can test it before use.

IMPORTANT: Fill the Ejection Canister completely with black powder. Use 3FG powder or finer; 4FG is best. Powder MUST touch the igniter for reliable ignition. Black powder can "bridge" or clump, so tap the Canister and look carefully to make sure the powder is in contact with the filament in the base.

 

Price: $12.50

Jensen Model #85 Steam Engine

Details 

The Jensen Model #85 Steam Engine is the only "overtype" engine in the Jensen line. The compact little engine has the cylinder and flywheel mounted on the boiler. Lots of power for its size. Simple and easy to operate. No whistle. Jensen includes a funnel and a starter fuel supply. We include a squeeze bottle for filling the boiler and special cylinder oil.

Introductory price good through January 1, 2015! 

List Price: $133.95
Price: $120.00

The Lander electronic payload

Details 

THE LANDER is designed to be deployed from a high power rocket, and simulates a planetary lander probe. A 24-inch X form parachute lowers it to the ground. On landing the side panels release, forcing the Lander upright to the Deployed position and starting its data transmission.
Price: $300.00

ULS Module 2: Valve Manifold

Details 

The ULS-M2 Valve Manifold attaches to a nitrous oxide supply tank and connects to control circuitry in the ULS-M1 Base Module. It allows you to fill and fire floating-injector hybrid motors. Adapters are included for all common hybrid motor fill tubes. Options include a pressure gauge and the BFV oversize fill valve.
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Price: $250.00

XL Variable Capacity Ejection Canister

Details 

XL Ejection Canisters are for rockets with more volume to pressurize than can be done by our smaller canisters. Each Ejection Canister is tested for continuity before being packaged. Variable capacity allows you to determine how much propellant you wish to use for your particular recovery system.

IMPORTANT: Fill the Ejection Canister completely with black powder. Use 3FG powder or finer; 4FG is best. Powder MUST touch the igniter for reliable ignition. Black powder can "bridge" or clump, so tap the Canister and look carefully to make sure the powder is in contact with the filament in the base.

 

Price: $2.75

ULS Module 3: GOX/HV Ignition Module

Details 

The GOX/HV Ignition Module allows you to fill and fire non-pyrotechnic (HyperTEK) motors with your ULS system. It includes a regulator for the gaseous oxygen (GOX) tank, and a control box that connects to the ULS-M1 Base Module to deliver GOX and a high voltage spark to the motor at ignition.
Price: $250.00
Out of Stock

Jensen Model #70 Steam Engine

Details 

The Jensen Model #70 Steam Engine. Electrically heated boiler, oscillating cylinder design, high RPM. Capable of powering AC Generator or other models and gadgets.
List Price: $266.95
Price: $240.00

SIXPACK Multiple Launch Controller

Details 

The SIXPACK is perfect for clubs and large groups. It controls up to six launch pads from a central Launch Control box. Any 12 volt battery may be used to power the system. Any launch pads may be used.
Price: $149.95

GO Box 25 Foot Extension Cable

Details 

The GO Box Extension Cable adds 25 feet to the distance between you GO Box controller and the launch pad. Extension Cables can be connected together for any length you want. Also works for the FullBoost launch system.
Price: $11.00

CANSAT Transmitter

Details 

The CANSAT Transmitter board is now available separately. Two frequencies are available. The board is also available with an antenna connector for $10 extra.

The CANSAT Transmitter can only be sold to HAM Licensees. You must include your call sign in the Comments block in the shopping cart.

Full details and diagrams

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Price: $89.95

CANSAT Hardware-only Kit

Details 

If you are building your own CANSAT, or you would like to use the materials in the CANSAT kit as a backbone for your electronic payload, we can offer you the CANSAT hardware separately.
Price: $25.00

Nitrous Oxide Supply Tank, 20 pounds

Details 

This 20 pound NOX tank is suitable for all hybrid motors. Supplied with a CGA326 valve thread to match our ULS-M2 and most other hybrid launch systems. Siphon tube installed for upright operation.
Price: $259.00
Out of Stock

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Pratt Hobbies
11556 Platten Rd
Lyndonville, NY 14098
571-221-5820

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