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

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Pad Relay Module


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


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



Complete set of push-to-connect pressure fittings, as included with the ULS-M2 Valve Manifold.
Price: $45.00

SL1 Kevlar Thread, Custom length


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


The Pressure Gauge is available separately or as an upgrade to the ULS-M2 Valve Manifold. Tee-fitting with 1/4NPT threads included.
Price: $40.00

SL2 Kevlar Yarn


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


For do-it-yourselfers, our Standard Solenoid Valve is your best choice for hybrid motor fill systems.
Price: $120.00

BFV Oversize Fill Valve


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: $190.00



The Econo Valve is a less expensive option for building your own hybrid GSE. It should be used ONLY for smaller (G-H) motors.
Price: $90.00

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Pratt Hobbies
11556 Platten Rd
Lyndonville, NY 14098