Hi, It is a BT-56 based rocket (Dia 1.34") that takes Estes "D" and the
old Estes E15 motors
It's 30" long from end to end.
The great thing about this rocket was that it uses the odd sized BT-56
tubes that the Astrocam fits.
So, this rocket makes a great high altitude Astrocam booster.
The Maniac was sold for $9.95 when it first came out.
As a note, the engine hook needs to be elongated about a 1/4" to fit
the newer E9 motors.
Hope this helps...
Whatever the price is for an Estes Eliminator since they're the same exact
model with different decals. By the way the Maniac flies great on a F21-8.
Cut a spill hole in the chute though or it will drift away.
It should go for anywhere between $10-25. The Estes Eliminator is the
current incarnation of the rocket, and a new kit lists for $25.
It's main claim to fame is that it uses the plastic parts originally made
for an Enerjet kit back in the early 70's.
Later it was changed to use Estes D motors, and sold by Centuri as the
Phoenix Bird. Then a few years later it became an Estes kit as the
Challenger-II, the D11-powered carrier for the Astrocam. It has been a few
other Estes kits over the years, with either one length of tube or two, and
with D, or E sized (and two sizes of those) mounts.
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