Manufacturer: | Ellis Mountain Rocket Works |
Brief:
The Ellis Mountain J228 38mm single use motor provides a total impulse of 1104
N-S (72% J), giving a burn-time of 4.8 seconds. It is about 22 inches long
including the turned-aluminum forward closure.
Construction:
None required, unless you consider adding a masking tape thrust ring as
"construction".
Flight:
I flew the motor in a beta test 18" saucer and it gave some ride. No
igniter was provided so I supplied a large Magnelite home dipped igniter.
Ignition started with some flame spewing out of the nozzle then the motor
immediately roared to life. I wouldn't consider it hard to light or all that
slow to pressurize. That Magnelite is good stuff. It sputtered a bit at burn
out. Way cool flight!
PROs: Long burn, fire, smoke, and noise.
CONs: Cost ($75)
Flight Rating: 5 out of 5
Summary:
This is a perfect motor for BIG saucers and should have enough thrust for many
'real' rockets also. I deducted a point in the overall rating due to its cost.
Overall Rating: 4 out of 5
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D.S. (May 2, 2005)