Pratt Hobbies, Inc.
Rocketry Catalog
 Innovative Launch Systems and Accessories
for Model Hobbyists
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Contrail 54mm J234 Reload Kit

Details 

One J234 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 H222 3-Pack Reload Kit

Details 

Three-pack of H222 reloads for Contrail 38mm motor hardware. Requires 16 inch casing and Medium nozzle.
Price: $60.00
Out of Stock

 

Details 

Upgrade kit required to fire XXF loads. Includes special injector and nozzle.
Price: $60.00

Stensat Radio Beacon

Details 

The Stensat radio beacon is a small FM transmitter capable of generating AX.25 Unnumbered Information (UI) packets at 1200 bps AFSK and 9600 bps FSK. The 9600 bps FSK signal is compatible with G3RUH modulation. Power level is adjustable from 0 to 3 watts operating on a single 5 to 12 volt supply.


Price: $750.00

Sky Ripper 54mm 1120 Motor Hardware Set

Details 

Sky Ripper 54mm 1120cc Motor Set. Includes 36 inch long motor casing and a complete set of internal parts. Use the CR-54-REL reload two-pack to set up this motor as a K257 or a K347.
Price: $200.00
Out of Stock

Sky Ripper 54mm 830 Hardware Set

Details 

Sky Ripper 54mm 830cc Motor Set. Includes 28 inch long motor casing and a complete set of internal parts. Use the CR-54-REL reload two-pack to set up this motor as a J261 or a J337.
Price: $193.00
Out of Stock

Sky Ripper 54mm 580 Motor Set

Details 

Sky Ripper 54mm 580cc Motor Set. Includes 24 inch long motor casing and a complete set of internal parts. Use the CR-54-REL reload two-pack to set up this motor as a J263 or a J348.
Price: $188.00
Out of Stock

Sky Ripper 54mm Reload 2-Pack

Details 

2-pack of reloads for Sky Ripper 54mm motor system. This reload kit fits all sizes of Sky Ripper 54mm motors and includes all the parts you need.
Price: $49.00
Out of Stock

Contrail 54mm Top Hat fitting

Details 

The 54mm "Top Hat" Retention Fitting fits between the standard forward closure that comes with Contrail 54mm hybrid rocket motors and the forward snap ring. The vent on the forward closure fits through a hole in the Top Hat. Installing the Top Hat gives you a strong, positive attachment point for your shock cord or motor retention system.
Price: $25.00
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 Rockets I155 3-pack Reload Kit

Details 

Three-pack of I155 reloads for the Contrail 38mm motor system. Requires 28 inch casing and Slow nozzle.
Price: $60.00
Out of Stock

Contrail Rockets 54mm 28 inch Motor Hardware Set

Details 

Contrail 54mm 28 inch long hybrid motor hardware set, with one nozzle speed. Select the nozzle speed required by the load you want to fire when you order the hardware set.
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Price: $215.00
Out of Stock

Contrail Rockets L800 Reload Kit

Details 

One fuel grain and parts for the CR-75-3200 Contrail motor casing set with Medium nozzle and Medium combustion chamber. Tripoli certified as L800. Sparky fuel composition.
Price: $95.00
Out of Stock

Contrail Rockets L369 Reload Kit

Details 

One fuel grain and parts for the CR-75-3200 Contrail motor casing set with Slow nozzle and Medium combustion chamber. Tripoli certified as L369. Sparky fuel composition.
Price: $95.00
Out of Stock

Contrail Rockets K707 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 K707. Black Gold fuel composition.
Price: $75.00
Out of Stock

Contrail Rockets K678 Reload Kit

Details 

One fuel grain and parts for the CR-75-2050 Contrail motor casing set with Medium nozzle and Short combustion chamber. Tripoli certified as K678. Black Gold fuel composition.
Price: $85.00
Out of Stock

Contrail Rockets K404 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 K404. Sparky fuel composition.
Price: $85.00
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

 

Details 

Single use reload kit for the Contrail Rockets 98mm hybrid motor system.
Price: $225.00
Out of Stock

Sky Ripper 54mm Motor System

Details 

Complete set of all three Sky Ripper 54mm casings, plus one set of internal parts. All you need to fly all the Sky Ripper 54mm certified motor combinations.
Price: $350.00
Out of Stock

Contrail 54mm J358 Reload Kit

Details 

One J358 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

Remotely Operated Underwater Vehicle

Details 

This is an updated low cost small tethered remotely operated underwater vehicle. It is designed to work in small water tanks such as open stock tanks of 100 gallons or greater and bath tubs. The ROV is a 4 motor design with two horizontal thrusters and two vertical thrusters. The motors are completely exposed to the water and will work for several
months depending on the quality of the water. The motors are inexpensive and easy to replace. A hook is included for the ROV to pick up and move objects. Soldering and simple hand tools are required for assembly. Requires 2 AA batteries.

Price: $70.00

Rocket Glue, 1 oz, 3 bottles

Details 

Three pack of the one ounce bottles of Rocket Glue. Just right for sharing in a group building session!
Price: $5.50

Rocket Glue, 1 oz bottle

Details 

Rocket Glue is simply the best glue to use to build model rocket kits with balsa, cardboard and plastic parts. As safe and non-toxic as conventional white glue, it grabs MUCH faster, and it works on plastic! 1 oz bottle makes sharing easy. Water cleanup. Refills available.
Price: $2.50

MARSA54L Flight Computer

Details 

The MARSA54L is a true flight computer, one of the most programmable and versatile flight controllers available. It has both an accelerometer and an air pressure sensor, and is completely programmable with the onboard display and joystick. A USB port and MarsaConnect software allows easy download and graphing of flight data. Compatible with future MarsaNET wireless products. For detailed information and the users manual, see our Info Pages.

We include an untrabright status LED and cable that can be mounted on the outside of your rocket and allows you to verify flight ready status from 100 feet away (a $6 value). 

Price: $179.00

 

Details 

Forward Bulkhead fits all lengths of Contrail 54mm motor casings. Seals N2O tank section of motor and provides fitting for vent tube.
Price: $50.00
Out of Stock

 

Details 

Three port injector for Contrail 54mm hybrid motors. Fits all casing lengths. Used with XFast nozzle only.
Price: $60.00
Out of Stock

 

Details 

Single port injector for Contrail 54mm hybrid motors. Fits all casing lengths. Used with Slow, Med/Fast, and XFast nozzles.
Price: $45.00
Out of Stock

Contrail Rockets H303 3-pack Reload Kit

Details 

Three-pack of H303 reloads for the Contrail 38mm motor system. Requires 16 inch casing and Fast nozzle.
Price: $45.00
Out of Stock

Contrail 54mm J642 Reload Kit

Details 

One J642 reload for Contrail 54mm hybrid motor. Includes injector orifice, fill line, igniter. Requires 36 in. 54mm casing with X-Fast nozzle and three- port injector.
Price: $54.00
Out of Stock

Galaxy Explorer Rocket Kit

Details 

The Galaxy Explorer is a basic model rocket kit designed for beginners. All parts are pre-cut. Building the Galaxy Explorer requires scissors and white glue. Flying the Galaxy Explorer requires a launch pad, an electrical ignition system and an A or B size model rocket motor.
Price: $4.50

Contrail 54mm J355 Reload Kit

Details 

One J355 reload for Contrail 54mm hybrid motor. Includes injector orifice, fill line, igniter. Requires 28 in. 54mm casing with Medium nozzle and single port injector.
Price: $44.00

Contrail Rockets I290 3-pack Reload Kit

Details 

Three-pack of I290 Sparky reloads for the Contrail Rockets 38mm motor system. Requires 36 in casing and Fast nozzle.
Price: $70.00
Out of Stock

Contrail Rockets H340 3-pack Reload Kit

Details 

Three-pack of H340 Sparky reloads for the Contrail Rockets 38mm motor system. Requires 28 in casing and Fast nozzle.
Price: $70.00
Out of Stock

Contrail Rockets I727 3-pack Reload Kit

Details 

Three-pack of I247 reloads for the Contrail 38mm motor system. Requires 36 inch casing and XXF Upgrade Kit.
Price: $80.00
Out of Stock

Contrail Rockets I747 3-pack Reload Kit

Details 

Three-pack of I747 reloads for the Contrail 38mm motor system. Requires 28 inch casing and XXF Upgrade Kit.
Price: $80.00
Out of Stock

Contrail Rockets H377 3-pack Reload Kit

Details 

Three-pack of H377 reloads for the Contrail 38mm motor system. Requires 28 inch casing and Fast nozzle.
Price: $60.00
Out of Stock

Contrail Rockets I255 3-pack Reload Kit

Details 

Three-pack of I255 reloads for the Contrail 38mm motor system. Requires 28 inch casing and Medium nozzle.
Price: $60.00
Out of Stock

Contrail Rockets H246 3-pack Reload Kit

Details 

Three-pack of H246 reloads for the Contrail 38mm motor system. Requires 20 inch casing and Medium nozzle.
Price: $60.00
Out of Stock

 

Details 

Graphite nozzles to fit Contrail Rockets 54mm motor hardware. Set includes Slow, Med/Fast, XFast, or XXFast.
Price: $135.00
Out of Stock

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

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