HARDWARE / PRODUCTAdded 21 Jul 2026

Cowbell Suborbital Test Rocket

Miles Space / RocketStar
Cowbell Suborbital Test Rocket

12-meter aerospike-powered developmental suborbital test rocket intended to fly from Cape Canaveral's Launch Complex 48.

Key figurescomparable across the catalogue

Largest dimension
12,000 mm

Normalised to common units so this product can be compared with others in its category. The supplier's own wording is below.

As published by the supplier

Length
12 meters
Target test altitude
~21,000 meters (suborbital)
Propulsion
RocketStar Aerospike Engine
Launch site
Launch Complex 48, Cape Canaveral, Florida
Vehicle class
Single-stage-to-orbit (SSTO) developmental test rocket

About

Cowbell is RocketStar’s developmental single-stage-to-orbit (SSTO) test rocket used to demonstrate the company’s reusable aerospike engine technology in flight. The 12-meter vehicle is designed to reach an altitude of roughly 21,000 meters on suborbital test flights, subject to final safety requirements, launching from Launch Complex 48 at Cape Canaveral, Florida — a multi-use pad supporting small launch vehicle developers. RocketStar has flown Cowbell carrying a prototype payload for resource-mapping startup Lunasonde, using the flight to validate the aerospike engine’s thrust, reusability and altitude-compensation characteristics ahead of an eventual orbital launch vehicle program.

Documentation

No public datasheet yet — request the datasheet / ICD from the supplier.

Source: rocketstar.nyc ↗

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