In celebration of the court victory that asserts our right to pursue our hobby,
we introduce the LIBERTY 4 ….



The LIBERTY 4 is the traditional muscle car of rockets. Strong and uncomplicated, it burns rubber from here to the burger hop. This is
no temperamental, whiny little Euro-car. It’s muscle, brute force, it’s pure freedom.

………The freedom to pursue our hobby.

Perfect for Cert-1 and Cert-2 flights!

Now in MAGNA-FRAME (what's Magna-Frame?)

LIBERTY 4 Specs:

Diameter: 3.90 I.D. Length: 68” long, Weight: 4.2 lbs
Motortube: Can be built either as 38mm or 54mm motor mount (comes with both).

LIBERTY 4 Features:

  • Pinnacle nosecone
  • G-10 Fins
  • Pre-slotted MAGNA_FRAME
  • Decal “LIBERTY 4”
  • Hardware
  • Aircraft-ply centering rings
  • Aluminum railguides
  • Nylon chute
  • Kevlar chute protector
  • Motor-holder retention
  • Detailed instruction booklet
  • shockcord
  • 38mm motortube (optional 54mm)
  • Giant Leap quality at a low PRICE!!


A note on motor mounts: Your Liberty comes with the option of a permanent 38mm or 54mm motor mount. You make the choice when you build the kit. If you decide to built it as a 38mm and you want a Slimline motor retainer, get the 38mm Slimline retainer below. If you decide to go the 54mm route, then get the 54mm Slimline retainer below. Remember, if you build it with the 54mm mount, you can still fly 38mm motors using the 54 to 38mm Slimline motor adapter listed below.

Value Priced $109.95

LIBERTY 4 OPTIONS:

Upgrade: 38mm Slimline Motor Retention System $21.00
(Replaces the motor-holder retention system. For 38mm motor-mount).
Check it out

Upgrade: 54mm Slimline Motor Retention System $22.00
(Replaces the motor-holder retention system. For 54mm motor-mount).
Check it out

Upgrade: Slimline Adapter 54/38mm $25.95
(For use with the 54mm motor-mount option if you want to fly smaller impulse motors. The adapter requires 54mm Slimline Motor Retention
System above to adapt down to 38mm. Adapting from 38 to 29mm is not recommended with this kit).
Check it out

Upgrade: Kevlar shockcord protector upgrade $6.95
(Prevents hot gases from burning / weakening nylon shockcord.
Check it out

Upgrade: Dyna-Wind airframe $49.95
(Strong airframe, smooth, with NO spiral-grooves. Our latest.
Check it out







Ron Swenson's Liberty 4 gets him Certified Level 2 at ROC in Lucerne Valley on a J350. Awesome flight!
Robert Talamantez with his Liberty 4 at LDRS 30

Hosting, Development and Maintenance by The Blast Zone
Copyright © Giant Leap Rocketry, all rights reserved.
Contact the Webmaster