Project
316 Static - IE24B Engine test

Construction

• This was revision B of the IE24 engine. 1/4-20 Nylon bolts were used in the nozzle assembly and steel 1/4-20 bolts were used in the end cap. In an effort to prevent the epoxy end cap from burning on the sides like the IE24A engine, epoxy was brushed on top of the fuel and igniter to prevent any gaps or open cracks between the epoxy end cap and the fuel. A 2:1 ratio of Kno3 and West systems epoxy was used as the end cap. This cap would burn and act as the smoke tracer and recovery delay.

Pros

• IE24 engine nozzle assembly is very easy to assemble.
• Nylon bolts weigh 75% less than steel bolts.

Cons

• The end cap still burned around the edges causing a premature failure of the engine.
• The end cap was ejected from the engine.
• Nylon bolts are not strong enough for this application.

Pictures

• Nylon bolts in the nozzle assembly.
• Engine on test stand.
• Engine in test tank with lid open.
• Damage to the engine casing where the end cap was showing erosion due to edge burning.

Video

• Video of test.

CAD Drawings

• IE24B design.

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