Pratt Hobbies, Inc.
Rocketry Catalog
 Innovative Launch Systems and Accessories
for Model Hobbyists
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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 Rockets J246 3-Pack Reload Kit

Details 

Three-pack of J246 reloads for the Contrail 38mm motor system. Requires 36 inch casing and Medium nozzle.
Price: $60.00
Out of Stock

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

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 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 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 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

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

 

Details 

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

 

Details 

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

 

Details 

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

 

Details 

Contrail 98mm (4 inch) diameter Motor Casing Set, with all required hardware for currently certified M1575 and M2800 loads.
Price: $1,000.00
Out of Stock

Contrail Rockets G300 3-Pack Reload Kit

Details 

Three-pack of H248 reloads for the Contrail 38mm motor system. Requires 16 inch casing and Fast nozzle.
Price: $50.00
Out of Stock

Contrail Rockets G234 3-Pack Reload Kit

Details 

Three-pack of G234 reloads for Contrail 38mm motor system. Requires 28 inch casing and Fast nozzle.
Price: $60.00
Out of Stock

Contrail Rockets J800 3-Pack Reload Kit

Details 

Three-pack of J800 reloads for the Contrail 38mm motor system. Requires 48 inch casing and XXF Upgrade Kit.
Price: $80.00
Out of Stock

Contrail Rockets J345 3-Pack Reload Kit

Details 

Three-pack of J345 reloads for Contrail 38mm hybrid motor system. Requires 48 inch casing and Fast nozzle.
Price: $50.00
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 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

 

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

 

Details 

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

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

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
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 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

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
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 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

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 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

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 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

 

Details 

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

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

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

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