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Psst 50
General
Description
An all-American
Jetex-type engine, the Psst 50 was fabricated
by South Shore Metal Products, Inc., of No.
Amityville, N.Y. It was distributed by
Berkeley Models.
The Psst 50 used
standard Jetex 50 propellant, or the V-MAX
alternative pellets.
Psst Double 50
A Psst "Double 50"
was also made, holding more propellant
pellets.
Suitable Model
Aircraft
Wingspan
(in)
[cm]
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24
[61]
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Wing area
(in²)
[cm²]
|
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Weight (max,
oz)
[gm]
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3
[85]
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Performance
Specifications
SI (metric) units
provided in brackets
Weights and measures
by David Fritchman, Socoorro,
NM
|
Thrust (avg, oz)
[gm]
|
|
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Thrust (max, oz)
[gm]
|
|
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Thrust w/AT¹ (nom, oz)
[gm]
|
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Duration
(sec/pellet)
|
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Duration (max, sec)
|
|
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Weight (dry, oz)
[gm]
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w/o clips =0.246 [6.99]
clips = 0.110 [3.11]
total = 0.356 [10.10]
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Weight (full, oz)
[gm]
|
|
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Propellant (min, oz)
[gm]
|
|
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Propellant (max, oz)
[gm]
|
|
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Total impulse (oz-sec)
[N]
|
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Specific impulse (Isp,
sec)
|
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Propellant mass
fraction²
|
|
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Length (in) [cm]
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|
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Width (max, in) [cm]
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|
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Chamber ID (in) [cm]
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Throat (in) [mm]
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0.040
[1.02]
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Burn surface (nom, in²)
[cm²]
|
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Operating pressure (psia)
[atm]
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Additional
Illustrations
Psst engines came with a two-piece sheet
metal engine mounting clip.
Psst 50 engines have an all-aluminum
chamber and forward closure, held closed by a
heavy U-clip. The clip is forced tight by a
tempered leaf spring that surrounds the
nozzle.
[Click image to see full-size exploded
view of the Psst 50]
[Click image to see full-size exploded
view of the Psst 50]
Note that the Psst engines were made in
the USA.
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