Zn-S-Al RECORD ISP of 67s |
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Written by Tony Vyverman
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maandag, 12 maart 2007 |
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Page 1 of 2
The ZAS5P-2 is a cigarette burner provided with a monoblock of cast Zn-S-Al. The objective of the test was to confirm earlier test results with the addition of 10% aluminum.
As in previous tests with cigarette burners the throat was 8 mm or a ratio of Ap/At of 44. Earlier test (ZAS5-1 en ZAS5-2) have indicated that an Ap/At of 29 is still possible for a good functioning.
The motor has the following characteristics :
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Propellant grain
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2239 g (monoblok)
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Composition propellant
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Zn :64.5%, S : 25.5%, Al : 10 %
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Type of grain
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cigarette
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dimensions
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length : 251 mm , diameter : 53 mm
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Density grain
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3.442
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Mass ignition powder
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92 g
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Composition ignition powder
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Zn : 75 % : S : 25 %
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Length motor chamber
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300 mm
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Dimensions nozzle
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Dc : 56 : Dt : 8 mm ; De : 44 mm
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coating
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1 layer of textile tape;
1 layer of glass fiber polyester: 1.5 mm
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Web thickness
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2 mm
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Material case
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steel
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The propellant grain was manufactured through melting in an oil bath.
The nozzle is composed of 3 parts:
- 1. a convergent section of 20° (half top angle) made from steel
- 2. a throat section made from graphite inserted in an aluminum tube of 40 mm diameter
- 3. the divergent part with an half outlet angle of 9° and outlet diameter of 44 mm.
Silicon was used to seal the different parts.
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Last Updated ( woensdag, 26 september 2007 )
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