Salami Rocket: Unterschied zwischen den Versionen
Amir (Diskussion | Beiträge) K →Links |
Amir (Diskussion | Beiträge) |
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| (44 dazwischenliegende Versionen von 2 Benutzern werden nicht angezeigt) | |||
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= WTF? = | = WTF? = | ||
[[Image:Hybrids big.png|thumb|Hybrid rocket propulsion system conceptual overview]] | [[Image:Hybrids big.png|thumb|left|Hybrid rocket propulsion system conceptual overview]] | ||
Nomen est omen. Salami rocket is about building a [http://en.wikipedia.org/wiki/Hybrid_rocket hybrid rocket] with a gaseous oxydizer and salami as propellants. | Nomen est omen. [http://en.wikipedia.org/wiki/Salami Salami] rocket is about building a [http://en.wikipedia.org/wiki/Hybrid_rocket hybrid rocket] with a gaseous [http://en.wikipedia.org/wiki/Oxidizing_agent oxydizer] (N<sub>2</sub>0) and salami as propellants. | ||
= Oxydizer = | = Oxydizer = | ||
I | I chose [http://en.wikipedia.org/wiki/N2O N<sub>2</sub>O] over [http://en.wikipedia.org/wiki/Oxygen O<sub>2</sub>] because although N<sub>2</sub>O carries a lot of conjectural inert nitrogen (64%) oxygen is much harder to handle (tank filling, storage & injection). Additionally the [http://en.wikipedia.org/wiki/Nitrogen 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 [http://en.wikipedia.org/wiki/Whipped-cream_charger whipped-cream chargers]. | |||
= Fuel = | = Fuel = | ||
Salami: High efficency hydrocarbon based fuel ;) | |||
= | = Simulation = | ||
* Run Tank: A light-weight container for the oxydizer capable of sustaining enough pressure | Im using [http://www.apogeerockets.com/RockSim.asp RockSim] to simulate the flight stability of the rocket. The behaviour of the N<sub>2</sub>0/ hybrid motor is simulated by an external model programmed in C++. | ||
* | |||
= Parts = | |||
* Injector: Aids in vaporizing the (still) liquid oxydizery. | [[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<br>(vapor pressure of N<sub>2</sub>0 at 20°C) but for reasons of safety i assume 200bar as the minimum. | |||
* [http://en.wikipedia.org/wiki/Pressure_vessel 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 [http://en.wikipedia.org/wiki/Combustion_chamber combustion chamber]. | |||
* [http://en.wikipedia.org/wiki/Injector 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. | * 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. | * [http://en.wikipedia.org/wiki/Nozzle Nozzle]: An opening that dramatically accelerates the hot gas escaping the combustion chamber. | ||
* Ignitor: Preheating the fuel and initializing combustion. | * Ignitor: Preheating the fuel and initializing combustion. | ||
* | * Body tube: Enhances airodynamic properties of the rocket and encapsulates the motor. | ||
* Recovery System: Enables slow decent after burn-out for safety and reusability | * Motor mount: Anchors the motor within the body tube | ||
* [http://en.wikipedia.org/wiki/Fins Fins]: Enhances airodynamic/stability properties of the rocket. | |||
* [http://en.wikipedia.org/wiki/Model_rocket#Model_rocket_recovery_methods Recovery System]: Enables slow decent after burn-out for safety and reusability | |||
* Tail camera: It's all about the nice view | |||
* [http://en.wikipedia.org/wiki/Altimeter Altimeter]: Measurement concludes the fate of the [http://en.wikipedia.org/wiki/Schr%C3%B6dinger%27s_cat#Copenhagen_interpretation cat] | |||
* [http://en.wikipedia.org/wiki/Electric_beacon 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 == | == Run Tank == | ||
[[Bild:Run tank.jpg|thumb|left|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) | ||
* Connector: 1,27cm (1/2") | * Connector: 1,27cm (1/2") | ||
* Max Pressure: 200bar | * Max Pressure: 200bar | ||
== Throttle valve == | == Throttle valve == | ||
An adjustable throttle valve ([ | [[Bild:Scaled-dscn9104.jpg|left|thumb|Throttle valve]] | ||
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|left|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] | |||
* Diameter: 54mm | |||
== Combustion Chamber == | == Combustion Chamber == | ||
[[Bild:Combustion chamber.jpg|left|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: | * Capacity: 255ml (9 oz) | ||
* Connector: 1,27cm (1/2") | * Connector: 1,27cm (1/2") | ||
* Max Pressure: 200bar | * Max Pressure: 200bar | ||
== Nozzle == | == Nozzle == | ||
[[Bild:Nozzle.jpg|left|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 | |||
* Diameter: 54mm | |||
== Ignitor == | == Ignitor == | ||
The ignitor charge consists of black powder and paraffin wax wrapped in thin papper. It is triggered by an [http://en.wikipedia.org/wiki/Arduino arduino] which is remotely controlled. | |||
== Body tube == | |||
[[Bild:Body tube.jpg|left|thumb|100px|Body tube]] | |||
Cardboard tube, intended for postal delivery. | |||
* Dimension: 1000 x 140 x 3 mm | |||
== Motor mount & Fins == | |||
[[Bild:Motor mount and fins.jpg|left|thumb|100px|Motor mount and fins]] | |||
Wooden centering rings and perspex fins, precisely milled with a CNC machine. | |||
== Recover System == | == Recover System == | ||
None specified/selected yet. | None specified/selected yet. | ||
== Filling System == | |||
[[Bild:Filling device.jpg|left|thumb|100px|Filling device]] | |||
A slightly modified CO<sub>2</sub> charging device for paintball guns. | |||
= Testing = | |||
After a few backyard tests with a rather improvised device, we tested the actual motor at [http://metalab.at/wiki/Stadtflucht2 Lindabrunn]. Special thanks to [[User:Kyrah|kyrah]] and [[User:MariusKintel|marius]] for support, pyromantic inspiration and fuel sponsoring. | |||
== Videos == | |||
* [http://www.youtube.com/watch?v=947LucSeeLQ Bazooka] | |||
* [http://www.youtube.com/watch?v=z7lsm5o20LY Bazooka - alternate version] | |||
* [http://www.youtube.com/watch?v=M-OZr2rxLkA Smoked Salami] | |||
* [http://www.youtube.com/watch?v=jjUOp_KC-34 Almost Burning] | |||
* [http://www.youtube.com/watch?v=MuqjGUcI99Y Almost Burning - alternate version] | |||
* [http://www.youtube.com/watch?v=qxXtl7s4o_0 Burn!] | |||
= Links = | = Links = | ||
| Zeile 68: | Zeile 156: | ||
* [http://www.nakka-rocketry.net/ Very helpful articles of Richard Nakka about his experimental rockets] | * [http://www.nakka-rocketry.net/ Very helpful articles of Richard Nakka about his experimental rockets] | ||
* [http://www.modellraketen.info/knowhow.html Rocketry know-how DB (DE)] | * [http://www.modellraketen.info/knowhow.html Rocketry know-how DB (DE)] | ||
* [http://64.41.64.113/home/tips.html Model Rocketry Tips] | |||
* [http://www.pcprg.com/rocketre.htm Building a Model Rocket Parachute Recovery System by Dr. Jean Potvin] | |||
* [http://www.grc.nasa.gov/WWW/K-12/airplane/rktthsum.html Nasa: Rocket thrust Equations] | |||
[[Kategorie:Projekte]] | |||