University of Utah Unity IV Responsibilities

• Motor System– Fuel– Nozzle– Ignition

• Flight Profile• Maximum Energy Footprint

Motor System

• Fuel– HTPB: Fuel grain composed of R-45M resin– Cross- linked with diisocyanate

• Motor Housing– 6061-T6 Aluminum– Static tested to 1200 psia

• Nozzle– Ceramic Composite– Rated to 5000 F

Ignition

• Model Rocket Motors– 2, Estes C8-0 motors

• Accessible on Launch Rail• Low power requirement

– 4 AA Batteries

• Reliable Performance

HTP

B

HTP

B

NO2 inletEstes C8-0 Motor

Injector

“O” Ring Seal

Motor Cap Assembly

Flight Profile• Maximum Altitude

– 10,641 feet AGL, at T = 28 seconds

• Burn Time– T = 5.4 seconds

• Flight Velocity– Launch Rail Exit = 89.1 ft/s– Overall Flight = 0.71 Mach

• FTS Failure Impact– 763 ft/s at T=58 seconds

Maximum Energy Footprint

• 5.40 Miles at =450

• No Critical Areas with in Range

Motor Assembly

Motor Cap

Motor Housing

Motor Nozzle

Motor Nozzle

Motor Nozzle Retainer

Motor Assembly

Fuel Mixing Procedure

• Safety Equipment• Liquid Chemicals• Incorporate By Hand• Dry Chemicals• Incorporate By Hand• Mix For 30 Minutes

Fuel Mixing Problems

• Need More Mixing Time• Recipe• Catalyst

3” Motor Fuel Mixing

8” Motor Fuel Mixing

Modified Fuel Mixing Tank

Portable Oven Design 1

Portable Oven Design 2

Portable Oven Design 3

Mandrel Configurations

Mandrel Configurations

Mandrel Configurations