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Why pressure in HTPB reactor decreases during reaction?
because of butadiene gas consumed in reaction that,s why the pressure of htpb reactor decreases.
What type of rubber is used to make hybrid rocket motors?
The most common synthetic rubbers used in hybrid rocket motors is HTPB (Hydroxyl-terminated polybutadiene).PBAN (Polybutadiene acrylonitrile) is also a common rubber used as fuel.
Environmental effects on hybrid rocket motor?
The thick trail of black smoke left by SpaceShipOne would tend to indicate that the HTPB/N2O hybrid rocket used on that particular craft is less than green. However, since hybrid rockets are not exactly mainstream technology, little information is available regarding their emission characteristics. This, of course, will likely change should hybrid rockets ever become more widely used. And efforts will likely be made to reduce emissions.
What does space shuttles use the most for fuel?
APCP (Ammonium Perchlorate Composite Propellant) is the primary fuel component of the Shuttle's Solid Rocket Boosters. Though the primary fuel element is Aluminum, it's a mixture of the following elements: Ammonium Perchlorate (oxidizer, 69.6% by weight), Aluminum (fuel, 16%), Iron Oxide (a catalyst, 0.4%), a polymer (such as PBAN or HTPB, serving as a binder that holds the mixture together and acting as secondary fuel, 12.04%), and an epoxy curing agent (1.96%). The Space Shuttle's main engines use a combination of Liquid Oxygen (LOx) and Liquid Hydrogen (LH2), stored in the Shuttle external tank.
What is model rocket fuel made of?
For liquid fuel systems it may be: "Liquid hydrogen and liquid oxygen - used in the Space Shuttle main engines * Gasoline and liquid oxygen - used in Goddard's early rockets * Kerosene and liquid oxygen - used on the first stage of the large Saturn V boosters in the Apollo program * Alcohol and liquid oxygen - used in the German V2 rockets * Nitrogen tetroxide/monomethyl hydrazine - used in the Cassini engines".For solid fuel rocks, it may be a mixture of 72% nitrate, 24% carbon and 4% sulfur. See the link for more info. If you mean the stuff that is used in the giant fuel tank that is attached to a departing space shuttle, then it is almost entirely liquid O2 (liquid oxygen). However "rocket fuel" is defined as: Any of the substances or mixtures of substances that can burn rapidly with controlled combustion to produce large volumes of gas at high pressures and temperatures; includes monopropellants (hydrogen peroxide and hydrazine), liquid bipropellant fuels (organic fuel and oxidizer), and solid propellants (mixed oxidizer-fuel in a propellant grain).
Are liquid fueled rockets still used today?
Solid, hence the name. The propellant in the solid rocket boosters on the US Space Shuttle is composed of ammonium perchlorate, powdered aluminum, iron oxide, and a polymeric binder to hold it all together. There are other possible mixtures as well.
