Purpose

Rumbler is responsible for boosting the vehicle to Mach 3 and 80,000 ft. The motor is lit by a pyrotechnic initiator at T-0 and burns out 8.2 seconds later at 12,600 ft.

Requirements

The following requirements are set out in the DTEG for the propulsion system.

RequirementDescriptionComponentCompliance
2.1Non-Toxic Propellants APCP listed as non-toxic
2.2Arming Functionality TBD
2.2.1Arming interrupt during pad ops TBD
2.4SRAD Testing Compliance Local Authorities and landowner permission secured. Complying with Applicable NFPA, ATF, and DoHS regulations.
2.4.1 (4.2)Pressure Vessel Testing 

Design to 2 MAWP, proof test to 1.5 MAWP.

2.4.3Successful Static Fire Test TBD
6.2.3Coupler LengthForward Retention RingExemption Obtained
6.3RF WindowBoosterExemption Obtained

 

Design

Impulse: 70,000 Ns (71% P)
Propellant: Ocean Water
Average thrust: 8560 N
Motor designation: P-8560
Propellant mass: 68.12 lbs
Delivered ISP (approximate): 227 s
Nozzle throat dia: 1.655 in
Nozzle exit dia: 5.49 in
Expansion ratio: 11.0
Burn time: 8.19 s
Max chamber pressure: 759.9 psi

Testing

Component Level Testing

 

6in_70kNs_BATES_rev6.eng

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