Pratt Hobbies, Inc.
Rocketry Catalog
 Innovative Launch Systems and Accessories
for Model Hobbyists
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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

Contrail Rockets K300 Reload Kit

Details 

One fuel grain and parts for the CR-75-2050 Contrail motor casing set with Slow nozzle and Short combustion chamber. Tripoli certified as K300. Black Smoke fuel composition.
Price: $85.00
Out of Stock

Contrail 54mm K321 Reload Kit

Details 

One K321 reload for Contrail 54mm hybrid motor. Includes injector orifice, fill line, igniter. Requires 48 in. 54mm casing with Medium nozzle and single port injector.
Price: $44.00
Out of Stock

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 Rockets 152mm Hybrid Motor Hardware

Details 

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

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

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

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

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
Out of Stock

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

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
Out of Stock

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: $275.00

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
Out of Stock

Pad Relay Module

Details 

The Pad Relay Module converts your conventional 12 volt launcher into a high power relay ignition system. The PRM connects a 12 volt battery at the pad directly to your igniters through a 40-amp relay. Any launch system capable of supplying 12 volts can be used to activate the PRM. Perfect for clusters and high-current igniters!
Price: $24.00

SL1 Kevlar Thread

Details 

SL1 Kevlar Thread is suitable for parachute shroud lines or shock cords on lightweight contest models. Pre-cut 20 foot package.
Price: $2.00

SL1 Kevlar Thread, Custom length

Details 

SL1 Kevlar Thread is suitable for parachute shroud lines or shock cords on lightweight contest models. We will cut any length you need at the same price as the pre-cut package. Simply order the number of feet you need.
Price: $0.10

Pressure Gauge Upgrade for Valve Manifold Module

Details 

The Pressure Gauge is available separately or as an upgrade to the ULS-M2 Valve Manifold. Tee-fitting with 1/4NPT threads included.
Price: $45.00

SL2 Kevlar Yarn

Details 

SL2 Kevlar Yarn is suitable for shock cords on lightweight models. This is what we use in our kits. Flameproof Kevlar will not burn through like elastic shock cord. 20 foot length.
Price: $3.00

Standard Fill Valve

Details 

For do-it-yourselfers, our Standard Solenoid Valve is your best choice for hybrid motor fill systems.
Price: $150.00

BFV Oversize Fill Valve

Details 

For people who want to build their own fill system, the BFV Oversize Fill Valve has twice the flow capacity of the "standard" fill valve. It draws 2.9 amps of current and does not require "solenoid saver" circuitry.
Price: $245.00

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

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