Salami Rocket: Unterschied zwischen den Versionen
aus Metalab Wiki, dem offenen Zentrum für meta-disziplinäre Magier und technisch-kreative Enthusiasten.
Zur Navigation springenZur Suche springenAmir (Diskussion | Beiträge) |
Amir (Diskussion | Beiträge) (→Parts) |
||
| Zeile 13: | Zeile 13: | ||
= Parts = | = Parts = | ||
| + | [[Bild:Scaled-dscn9121.jpg|thumb|Overview of the rocket parts]] | ||
All parts directly participating in the combustion would have to sustain at least 51 bar (vapor pressure of N<sub>2</sub>0 at 20°C) but for reasons of safety i assume 200bar as the minimum. | All parts directly participating in the combustion would have to sustain at least 51 bar (vapor pressure of N<sub>2</sub>0 at 20°C) but for reasons of safety i assume 200bar as the minimum. | ||
| Zeile 31: | Zeile 32: | ||
== Run Tank == | == Run Tank == | ||
| + | [[Bild:Run tank.jpg|thumb|Run tank]] | ||
[http://www.paintball-discounters.com/get_item_130017_co2-tank-aluminum-20-oz-with-on-off-valve.htm Smart Parts C02 aluminium tank] for paintball guns with on/off valve. | [http://www.paintball-discounters.com/get_item_130017_co2-tank-aluminum-20-oz-with-on-off-valve.htm Smart Parts C02 aluminium tank] for paintball guns with on/off valve. | ||
* Capacity: 591ml (20 oz) | * Capacity: 591ml (20 oz) | ||
| Zeile 37: | Zeile 39: | ||
== Throttle valve == | == Throttle valve == | ||
| + | [[Bild:Scaled-dscn9104.jpg|thumb|Throttle valve]] | ||
An adjustable throttle valve ([http://www.zoebl.co.at/produkte/drosselventile.html]) intended for use in hydraulics. | An adjustable throttle valve ([http://www.zoebl.co.at/produkte/drosselventile.html]) intended for use in hydraulics. | ||
* Connector: 1,27cm (1/2") | * Connector: 1,27cm (1/2") | ||
* Flow rate: 45 l/min | * Flow rate: 45 l/min | ||
* Working pressure: 350 bar | * Working pressure: 350 bar | ||
| + | |||
| + | |||
| + | |||
== Injector == | == Injector == | ||
| + | [[Bild:Injector.jpg|thumb|100px|Injector]] | ||
[http://www.rocketstore.co.uk/shop/product.asp?numRecordPosition=13&P_ID=1013&strPageHistory=man&strKeywords=&SearchFor=&PT_ID=0 SKR-54UC] | [http://www.rocketstore.co.uk/shop/product.asp?numRecordPosition=13&P_ID=1013&strPageHistory=man&strKeywords=&SearchFor=&PT_ID=0 SKR-54UC] | ||
* Diameter: 54mm | * Diameter: 54mm | ||
| + | |||
| + | |||
| + | |||
| + | |||
== Combustion Chamber == | == Combustion Chamber == | ||
| + | [[Bild:Combustion chamber.jpg|thumb|Combustion chamber]] | ||
[http://www.paintball-discounters.com/get_item_130017_co2-tank-aluminum-20-oz-with-on-off-valve.htm C02 aluminium tank] for paintball guns without on/off valve. | [http://www.paintball-discounters.com/get_item_130017_co2-tank-aluminum-20-oz-with-on-off-valve.htm C02 aluminium tank] for paintball guns without on/off valve. | ||
* Capacity: 255ml (9 oz) | * Capacity: 255ml (9 oz) | ||
| Zeile 54: | Zeile 66: | ||
== Nozzle == | == Nozzle == | ||
| + | [[Bild:Nozzle.jpg|thumb|100px|Nozzle]] | ||
[http://www.rocketstore.co.uk/shop/product.asp?numRecordPosition=17&P_ID=1012&strPageHistory=man&strKeywords=&SearchFor=&PT_ID=0 SKR-54NZL] graphite nozzle | [http://www.rocketstore.co.uk/shop/product.asp?numRecordPosition=17&P_ID=1012&strPageHistory=man&strKeywords=&SearchFor=&PT_ID=0 SKR-54NZL] graphite nozzle | ||
* Diameter: 54mm | * Diameter: 54mm | ||
| + | |||
| + | |||
| + | |||
| + | |||
| + | |||
== Ignitor == | == Ignitor == | ||
| Zeile 61: | Zeile 79: | ||
== Body tube == | == Body tube == | ||
| + | [[Bild:Body tube.jpg|thumb|100px|Body tube]] | ||
Cardboard tube, intended for postal delivery. | Cardboard tube, intended for postal delivery. | ||
* Dimension: 1000 x 140 x 3 mm | * Dimension: 1000 x 140 x 3 mm | ||
| − | |||
| − | == Fins == | + | |
| + | |||
| + | |||
| + | |||
| + | |||
| + | |||
| + | == Motor mount & Fins == | ||
| + | [[Bild:Motor mount and fins.jpg|thumb|100px|Motor mount and fins]] | ||
| + | Wooden centering rings and perspex fins, precisely milled with a CNC machine. | ||
| + | |||
| + | |||
| + | |||
| + | |||
| + | |||
== Recover System == | == Recover System == | ||
Version vom 28. Juli 2009, 17:35 Uhr
WTF?
Oxydizer
I chose N2O over O2 because although N2O carries a lot of conjectural inert nitrogen (64%) oxygen is much harder to handle (tank filling, storage & injection). Additionally the nitrogen, though not participating in combustion, raises the fuel erosion rate and cooles the nozzle enough to reuse it many times. Since the alternatives i found are quite expensive, i use the nitrous oxyde of whipped-cream chargers. By the way, never search for "Sahnespender" at google.
Fuel
Salami: High efficency hydrocarbon based fuel ;)
Simulation
Im using RockSim to simulate the flight stability of the rocket. The behaviour of the N20/ hybrid motor is simulated by an external model programmed in C++.
Parts
All parts directly participating in the combustion would have to sustain at least 51 bar (vapor pressure of N20 at 20°C) but for reasons of safety i assume 200bar as the minimum.
- Run Tank: A light-weight container for the oxydizer capable of sustaining enough pressure
- Throttle Valve: A valve to allow precise regulation of the oxydizer flow from the run tank to the combustion chamber.
- Injector: Aids in vaporizing the (still) liquid oxydizery.
- Combustion Chamber: Where the oxydizer/fuel mix burns. Additionally to pressure (same amount as for the run tank) it has to sustain heat.
- Nozzle: An opening that dramatically accelerates the hot gas escaping the combustion chamber.
- Ignitor: Preheating the fuel and initializing combustion.
- Body tube: Enhances airodynamic properties of the rocket and encapsulates the motor.
- Motor mount: Anchors the motor within the body tube
- Fins: Enhances airodynamic/stability properties of the rocket.
- Recovery System (parachute): Enables slow decent after burn-out for safety and reusability
- Tail camera: It's all about the nice view
- Altimeter: Measurement concludes the fate of the cat
- Electric beacon: Transmits a signal to ease finding the landing site.
- Filling system: Pipework to fill the run tank with nitrous oxyde from whipped cream chargers.
Run Tank
Smart Parts C02 aluminium tank for paintball guns with on/off valve.
- Capacity: 591ml (20 oz)
- Connector: 1,27cm (1/2")
- Max Pressure: 200bar
Throttle valve
An adjustable throttle valve ([1]) intended for use in hydraulics.
- Connector: 1,27cm (1/2")
- Flow rate: 45 l/min
- Working pressure: 350 bar
Injector
- Diameter: 54mm
Combustion Chamber
C02 aluminium tank for paintball guns without on/off valve.
- Capacity: 255ml (9 oz)
- Connector: 1,27cm (1/2")
- Max Pressure: 200bar
Nozzle
SKR-54NZL graphite nozzle
- Diameter: 54mm
Ignitor
None selected yet.
Body tube
Cardboard tube, intended for postal delivery.
- Dimension: 1000 x 140 x 3 mm
Motor mount & Fins
Wooden centering rings and perspex fins, precisely milled with a CNC machine.
Recover System
None specified/selected yet.
