Manufacturer: | Ellis Mountain Rocket Works |
Brief:
The Ellis J110-P a 54mm single use motor that provides 751 N-s total impulse
(~17% J) with a burn time of 6.8 seconds (Tripoli Motor Testings numbers,
the photo shows the EM numbers).
Construction:
This motor is only about 9.5" long, including the plugged aluminum
closure. It has a medusa nozzle, but only the center port is drilled. It does
not come with an igniter.
Flight:
I flew this motor in a beta version of an 18" saucer and lit it with a
large Magnelite igniter. This did the trick, but the motor took a long time to
finally come up to pressure and get going. It provided a nice long burn, but
because of low average thrust and a regressive profile, the saucer arced over
and was still under power after apogee. It then aerobraked down and
continued to spew large amounts of smoke, causing the LCO some concern. It
landed in a outcrop of brush that was damp so there was no risk of fire.
Flight Rating: 2 out of 5
Summary:
I have to admit the arcing flight was entertaining, however, I'd have to
recommend the J228 over this motor for any large, draggy design. My rating
reflects this application.
Overall Rating: 2 out of 5
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