Pratt Hobbies, Inc.
Rocketry Catalog
 Innovative Launch Systems and Accessories
for Model Hobbyists
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Contrail Rockets 3200 cc Hardware set
Contrail Rockets 3200 cc Hardware set

Details 
This Contrail motor hardware set is certified for L369, L800, L1222, L1428, L2525, M711, M1491 and M2281 loads. The 3200cc tank is included: select a nozzle and combustion chamber for the reload kit you want to use. Select the Slow nozzle and Medium combustion chamber for the L369 and M711; the Medium nozzle and Medium combustion chamber for the M800, L1222, and M1491; and the Fast nozzle and Long combustion chamber for the L1428, L2525, and M2281.
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Price: $550.00
Out of Stock
MicroBeacon
MicroBeacon

Details 

The MicroBeacon helps you find your model in the tall grass! Requires 12v battery, our MBB-12 or Duracell #21/23.
Price: $12.00
Out of Stock
Contrail Rockets K888 Reload Kit
Contrail Rockets K888 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 K888. Black fuel composition.
List Price: $130.00
Price: $85.00
Out of Stock
Contrail Rockets K543 Reload Kit
Contrail Rockets K543 Reload Kit

Details 
One fuel grain and parts for the CR-75-1450 Contrail motor casing set with Slow nozzle and Mini combustion chamber. Tripoli certified as K543. Black fuel composition.
List Price: $95.00
Price: $75.00
Out of Stock
Contrail Rockets 2050cc Hardware Set
Contrail Rockets 2050cc Hardware Set

Details 
This Contrail motor hardware set is certified for K888, K777, K678, K404 and K300 loads. The anodized aluminum casing set fits 75mm motor mounts; no external vent is necessary. You must select a Slow nozzle and a Short combustion chamber for the K300 and K404 loads, and a Medium nozzle and Short combustion chamber for K678, K777 and K888 loads.
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Price: $475.00
Out of Stock
Contrail Rockets 1400cc Hardware Set
Contrail Rockets 1400cc Hardware Set

Details 
This Contrail motor hardware set is certified for K456, K543, K630, and K707 loads. The anodized aluminum casing set fits 75mm motor mounts; no external vent is necessary. You must select a Slow nozzle, and a Mini combustion chamber for the K543 and K456 loads, and a Medium nozzle and Mini combustion chamber for K630 and K707 loads.
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Price: $450.00
Out of Stock
Contrail Rockets L2525 Reload Kit
Contrail Rockets L2525 Reload Kit

Details 
One fuel grain and parts for the CR-75-3200 Contrail motor casing set with Fast nozzle and Long combustion chamber. Tripoli certified as L2525. Black Gold fuel composition.
Price: $130.00
Out of Stock
Contrail Rockets 75mm Mini Combustion Chamber
Contrail Rockets 75mm Mini Combustion Chamber

Details 
Contrail Rockets MINI (7.875 in.) Combustion Chamber. Fits Contrail 75mm hardware.
Price: $100.00
Out of Stock
Contrail Rockets M1491 Reload Kit
Contrail Rockets M1491 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 M1491. Black fuel composition.
Price: $95.00
Out of Stock
Contrail Rockets M2281 Reload Kit
Contrail Rockets M2281 Reload Kit

Details 
One fuel grain and parts for the CR-75-3200 Contrail motor casing set with Fast nozzle and Long combustion chamber. Tripoli certified as M2281. Fast Black Smoke fuel composition.
Price: $130.00
Out of Stock
Contrail Rockets 75mm Fast Nozzle
Contrail Rockets 75mm Fast Nozzle

Details 
Contrail Rockets FAST Nozzle. Fits all 75mm Contrail Rockets combustion chambers. Includes graphite insert and hex flush mounting bolts.
Price: $140.00
Out of Stock
Pocket Igniter Tester
Pocket Igniter Tester

Details 
Test your igniters and ejection charges before launch to make sure they'll work! The Pocket Igniter Tester sounds a tone when it detects a complete circuit. Safe for use with low-current igniters (electric matches). Battery not included.
Price: $9.00
Out of Stock
Contrail 54mm J245 Reload Kit
Contrail 54mm J245 Reload Kit

Details 
One J245 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 Rockets Complete 54mm Motor Hardware Set
Contrail Rockets Complete 54mm Motor Hardware Set

Details 
Complete set of all 54mm components. Includes three casings, three nozzles, two injectors, all hardware.
Price: $535.00
Out of Stock
Contrail Rockets 54mm 48 Inch Motor Hardware Set
Contrail Rockets 54mm 48 Inch Motor Hardware Set

Details 
Contrail 54mm Motor Hardware with 48 inch length casing. Select Slow, Medium or X-Fast nozzle, and single port or three-port (X-Fast) injector.
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Price: $255.00
Out of Stock
Contrail Rockets 54mm 36 inch Motor Hardware Set
Contrail Rockets 54mm 36 inch Motor Hardware Set

Details 
Contrail 54mm 36 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: $235.00
Out of Stock
KRYTOX grease for hybrid motors
KRYTOX grease for hybrid motors

Details 
KRYTOX grease is specified for most hybrid motors, for lubricating o-rings and any components that come in contact with the oxidizer. Will not react with liquid nitrous oxide. 0.5 ounce tube.
Price: $35.00
Out of Stock
SL2 Kevlar Yarn, Custom length
SL2 Kevlar Yarn, Custom length

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. 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: $0.15
Out of Stock
 
MicroBeacon Battery

Details 
12 volt battery for the MB-12 MicroBeacon.
Price: $1.79
Out of Stock
Contrail 75mm Complete Motor System
Contrail 75mm Complete Motor System

Details 
The Contrail Complete Motor System contains all parts necessary to use all Contrail Rockets certified 75mm reload kits.
Price: $1,450.00
Out of Stock
Contrail Rockets I210 3-Pack Reload Kit
Contrail Rockets I210 3-Pack Reload Kit

Details 
Three-pack of I210 reloads for the Contrail Rockets 38mm motor system. Requires 36 inch casing and Medium nozzle.
Price: $45.00
Out of Stock
Contrail Rockets J222 3-Pack Reload Kit
Contrail Rockets J222 3-Pack Reload Kit

Details 
Three-pack of J222 loads for Contrail 38mm hybrid motor. Requires 48 inch casing and Medium nozzle.
Price: $60.00
Out of Stock
Contrail Rockets J150 3-Pack Reload Kit
Contrail Rockets J150 3-Pack Reload Kit

Details 
Three-pack of J150 loads for the Contrail Rockets 38mm hybrid motor system. Requires 36 inch motor casing and Slow nozzle.
Price: $60.00
Out of Stock
Contrail Rockets I400 3-Pack Reload Kit
Contrail Rockets I400 3-Pack Reload Kit

Details 
Three-pack of I400 reloads for the Contrail Rockets 38mm hybrid motor system. Requires 36 inch casing and Fast nozzle.
Price: $70.00
Out of Stock
Contrail Rockets H222 3-Pack Reload Kit
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
Contrail 38mm 48 inch Motor System
Contrail 38mm 48 inch Motor System

Details 
The Contrail Rockets 48 inch 38mm Motor System includes all three nozzles.
Price: $210.00
Out of Stock
Contrail Rockets J555 3-Pack Reload Kit
Contrail Rockets J555 3-Pack Reload Kit

Details 
Three-pack of J555 reloads for the Contrail Rockets 38mm motor system. Requires 48 inch casing and Fast nozzle.
Price: $70.00
Out of Stock
Contrail Rockets J333 3-Pack Reload Kit
Contrail Rockets J333 3-Pack Reload Kit

Details 
Three-pack of J333 reloads for the Contrail Rockets 38mm motor system. Requires 48 inch casing and Fast nozzle.
Price: $60.00
Out of Stock
Contrail Rockets L1428 Reload Kit
Contrail Rockets L1428 Reload Kit

Details 
One fuel grain and parts for the CR-75-3200 Contrail motor casing set with Fast nozzle and Long combustion chamber. Tripoli certified as L1428. Sparky fuel composition.
Price: $130.00
Out of Stock
Contrail Rockets I307 3-Pack Reload Kit
Contrail Rockets I307 3-Pack Reload Kit

Details 
Three-pack of I307 reloads for the Contrail Rockets 38mm motor system. Requires 36 inch casing and Fast nozzle.
Price: $60.00
Out of Stock
Contrail Rockets J246 3-Pack Reload Kit
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 Rockets I500 3-Pack Reload Kit
Contrail Rockets I500 3-Pack Reload Kit

Details 
Three-pack of I500 reloads for the Contrail Rockets 38mm motor system. Requires 28 inch casing and Fast nozzle.
Price: $70.00
Out of Stock
Contrail Rockets I221 3-Pack Reload Kit
Contrail Rockets I221 3-Pack Reload Kit

Details 
Three-pack of I221 reloads for the Contrail Rockets 38mm motor system. Requires 28 inch casing and Medium nozzle.
Price: $45.00
Out of Stock
Contrail Rockets 75mm 3200cc Tank Assembly
Contrail Rockets 75mm 3200cc Tank Assembly

Details 
Contrail Rockets 75mm 3200cc Oxidizer Tank Assembly. Includes sealed tank, five-port injector, and flush-mounting bolts.
Price: $325.00
Out of Stock
Contrail Rockets 75mm Short Combustion Chamber
Contrail Rockets 75mm Short Combustion Chamber

Details 
Contrail Rockets SHORT (9.875 in.) Combustion Chamber. Fits Contrail 75mm Nozzles and Tank Assemblies.
Price: $100.00
Out of Stock
Contrail Rockets 75mm Medium Combustion Chamber
Contrail Rockets 75mm Medium Combustion Chamber

Details 
Contrail Rockets MEDIUM (11.875 in.) Combustion Chamber. Fits 75mm Tank Assemblies and Nozzles.
Price: $135.00
Out of Stock
Contrail Rockets 75mm Long Combustion Chamber
Contrail Rockets 75mm Long Combustion Chamber

Details 
Contrail Rockets LONG (17.875 in.) Combustion Chamber. Fits 75mm Tank Assemblies and Nozzles.
Price: $145.00
Out of Stock
Contrail Rockets 75mm Slow Nozzle
Contrail Rockets 75mm Slow Nozzle

Details 
Contrail Rockets SLOW Nozzle. Fits all 75mm Contrail Rockets combustion chambers. Includes graphite insert and hex flush mounting bolts.
Price: $100.00
Out of Stock
Contrail Rockets 75mm Medium Nozzle
Contrail Rockets 75mm Medium Nozzle

Details 
Contrail Rockets MEDIUM Nozzle. Fits all 75mm Contrail Rockets combustion chambers. Includes graphite insert and hex flush mounting bolts.
Price: $115.00
Out of Stock
Contrail Rockets J242 3-Pack Reload Kit
Contrail Rockets J242 3-Pack Reload Kit

Details 
Three-pack of J242 reloads for the Contrail Rockets 38mm motor system. Requires 48 inch casing and Medium nozzle.
Price: $45.00
Out of Stock

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11556 Platten Rd
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571-221-5820

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