Questions tagged [hybrid-rocket]
Rocket engines which consist of a solid propellant and a liquid or gaseous oxidizer.
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"Semi" hybrid rocket? Throttleable solid fuel rocket?
Are there any published examples of "hybrid" rockets that used a propellant grain of mixed solid fuel and oxidizer where the injected component was only needed to sustain the burn without ...
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Why sugar is not commonly used as fuel in hybrid rocket engine?
Hybrid rocket engine usually used rubber or plastic as fuel but why not sugar? Just like many amateur solid rocket motors used sugar. What are the advantages of using rubber in hybrid engine over ...
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What are the Specific heat ratios of fluorine, Isopropyl Alcohol and Uranium?
I needed to calculate thrust and velocities of a rocket engine and its exhaust and in order to do that, I needed the values of Specific heat ratio(k) of Fluorine and k of Uranium and Isopropyl Alcohol....
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What are the various ways that hybrid rocket engines are "turned on" or ignited?
I want to know the more complex side of hybrid rocket engines. I already know most of the basics like Newtons third law and oxidizer.
But I want to learn more of the complex stuff. I know they are &...
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Will you be having rubber or wax with your peroxide? (hybrid engine fuel tradeoffs)
Hybrid engines offer some practical advantages and some budgetary ones that can offset lower ISP, including potentially safer solid fuel to store and non cryogenic storage of some oxidizers like ...
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Could one actually make a grain silo rocket?
Watching the recent SpaceX Starship tests got me to thinking:
Could you actually make a rocket using grain as the propellant?
Image from https://www.teslarati.com/spacex-starship-sn5-second-hop-plans/...
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How would a hybrid motor N2O propellant tank control pressure?
Cryogenic engine prop tanks vent in order to control tank pressure. Thermal energy that (inevitably) gets conducted into a cryo tank raises the propellant enthalpy and so the pressure of the critical ...
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Why did Virgin Galactic decide to use a hybrid engine vs liquid on their space ship?
To me, it seems like their business case is very dependent on rapid reuse. With this in mind, using a hybrid engine that would need to be replaced every flight seems very counter intuitive vs a liquid ...
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Oxidizer Line Pressure of DIY Hybrid Rocket Engine Limits Thrust?
So I’ve seen engines like these which use gaseous oxygen as an oxidizer and then a solid tube as a fuel. But do these types of hybrid engines have any possibility of creating a useful amount of thrust?...
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How would a hybrid rocket work?
How does a solid fuel liquid oxidizer hybrid rocket work? How do they throttle them up and down?
Virgin Galactic plans to use a hybrid engine, and I was also wondering how they were planning to store ...
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Have there been any orbital access provided by hybrid rockets?
As far as I know, Hybrid rocketry is limited to suborbital flights and amateur rocketry. I would like to know if there have been any rockets that made it into orbit, and what was the highest altitude ...
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Are there any hypergolic solid/liquid fuel combinations?
Could the principal of hypergolic fuels be applied to hybrid rockets? And if so, are there any known hypergolic solid/liquid combinations?
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Does NASA still plan for the Mars Ascent Vehicle to burn wax from the surface to orbit?
The NASA news item From Pedicures to the Peregrine Rocket, Paraffin Wax Proves Its Worth says:
The paraffin-based fuel also works under challenging environmental conditions, like the very low ...
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How do you avoid wasting oxidizer when designing a hybrid rocket?
I was thinking of designing a very simple and small Paraffin rocket engine as an experiment. One thing that I don't understand about these designs is how you efficiently use your oxidizer without a ...
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Why did Virgin Galactic switch back to HTPB after one launch using thermoplastic polyamide (i.e. nylon)?
A subsection of Second-generation engine in Wikipedia's article on RocketMotorTwo says:
New fuel formulation
Rather than use rubber-based HTPB in the solid portion of the hybrid rocket motor—which ...
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Could Sodium metal be used in rocket fuel?
For instance, I read that the Hercules X-265 rocket motor used in the Sprint missile was a solid double base propellant that used nitrocellulose with zirconium metal staples and nitroglycerin as a ...
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Why NASA's sudden renewed (apparently) interest in Wax hybrid engines? Which property is so attractive now?
update:
This answer links to Larry Russell Kellogg which links to NASA Tests Environmentally Friendly Rocket Fuel where images of Test firing of new Paraffin-Based Fuel at NASA Ames Research Center 1/...
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What properties define a good solid propellant for a hybrid engine? (e.g. why not use wood?)
This comment got me thinking...
Pure oxygen from a tank of LOX can allow a wide variety of materials to be used as a convenient if not always optimal rocket propellant; things like parafin and sugar ...
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Could you use Helium as an oxidizer? [closed]
I am trying to create an HRE (Hybrid Rocket Engine) and i am trying to find the best oxidizer. Do any of you have experience with using helium?
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Hybrid / solid rocket engines with large carbon content
Why solid rocket boosters or hybrid engines are favored towards larger hydrogen content, not carbon (C+LOX, C+NO2, C+N2H4O3)?
Is there any known data on Isp and issues of such combinations (both ...
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How to prevent melting too much paraffin in a hybrid LOX-paraffin rocket?
In a hybrid LOX rocket, only the flow of LOX may be controlled. The amount of paraffin melted by heat is determined by the very complex heat transfer from gas to solid paraffin. If the mixture of ...
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Isp of LOX-based hybrid rocket engines
Can anyone help to find data or book on Isp for hybrid rocket engines using LOX as oxidizer?
I am interested to know Isp for LOX combinations with carbon, Al+HTPB, parafin, sugar and others.
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Can a DIY rocket put an object into a stable orbit around earth? [duplicate]
Is it possible for a "home made" rocket to launch an object into a stable orbit assuming a person has calculated the right trajectory?
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Are there any complications of the position of the oxidizer injector on Orbitec's vortex rocket engine?
Orbitec's vortex rocket engine injects oxidizer from near the nozzle up the wall of the engine chamber in a vortex. The oxidizer injector being in this position seems unusual. Are there any ...
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Whipped cream hybrid rocket
I am currently working on a small hybrid rocket as a summer project. I've decided on using nitrous oxide as the oxidizer, but large tanks are expensive and I don't have a lot of money (I'm in high ...
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Is pogo oscillation a risk in hybrid motors?
Is pogo oscillation accounted for in design of hybrid motors? I'm thinking particularly about hybrids that use Nitrous Oxide as the oxidizer because the weird triple point effects that one experiences ...
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Challenges Facing Hybrid Rocketry
The concept of hybrid rocketry is very interesting, and seems like it has many advantages over its solid and liquid forebears. But having only a superficial idea of the challenges preventing it from ...
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