H73J
186 N·s · 73 N avgAeroTech RMS · class H · Blackjack · delay 4, 6, 8, 10 s · built for the RMS-38/240 case
152 mm long · 309 g loaded · 143 g propellant
Muster is a shopping aid, not an assembly guide. Build only to the reload's printed instructions — always the authority — and confirm every part with the manufacturer before you buy or fly.
What you need to fly it
The simplest build — in its own RMS-38/240 case. Reusable hardware you buy once, plus the single-use reload.
Reusable hardware to own
- RMS-38/240 case3824C
38 mm reusable motor case
Source: aerotech-rocketry.com
- 38 mm forward closure38FCC
Reusable; shared across every case length in this diameter
Source: aerotech-rocketry.com
- 38 mm aft closure38AC2
Reusable; holds the reload's single-use nozzle
Source: aerotech-rocketry.com
Single-use reload to buy
Single-use: grains, liner, nozzle, o-rings, delay element, igniter, and ejection charge
Source: thrustcurve.org
- A dab of high-temperature o-ring grease is needed on assembly (it comes with most hardware sets).
Cases that fly it
Its own case is the simplest; a longer case flies it too, with the adapter and spacers.