Hydrogen Peroxide Rocket

Thrust is generated by the volumetric expansion of the O2 and H2O vapor generated via the peroxide decomposition. The volume expansion is dependent on the strength of peroxide you start with, and how efficiently you can decompose the material Using the air amplifier is an interesting concept, but I'm not sure it will actually increase the thrust, other than possibly directing the thrust more efficiently. Can you share the design basis for the amplifier?

Depends on the air amplifier.

It would certainly increase the usable thrust by turning the high velocity /high pressure into high volume lower velocity low pressure thrust

Do not forget the impulse conservation law! If you do not consuder it than you have a perpetuum mobile.

The Germans used hydrogen peroxide and hydrazine it gives a terrific highly spontaneous and exothermic reaction. Both substances are very dangerous. Hydrogen peroxide above 75% can spontaneously ignite and even explode. A short time ago a lorry carrying a load of H2O2 exploded on route to is final destination. Hydrazine is the stuff they use in satellite thrusters, and is highly poisonous. I am sure there are better fuels out there. Plus because of the terrorist factor Hydrogen peroxide is on the watched list.

"Hydrogen peroxide above 75% can spontaneously ignite"

Hydrogen peroxide can't ignite no matter what the concentration. H₂O₂ decomposes into H₂O, O₂ and lots of heat, there is nothing here that will burn by itself.

What can happen though is that if there is a contaminant, the O₂ that is released can cause rapid oxidation and this is what people confuse with the H₂O₂ spontaneously burning. If there is no contaminant there is nothing to burn.

That bring me to my next point which is how you can increase the thrust from you H₂O₂ motor. Since there is plenty of O₂ available if you now introduce some sort of fuel it will readily burn and increase the thrust of the motor. Alcohol is a pretty good fuel to use and in theory all you need to do is add it to the exhaust and it will combust.

There was a thread a short wile back that looked at a rocket belt that is build by a company called Tecnologia Aeroespacial Mexicana ( TAM ). They also make hydrogen peroxide rocket motors and their site has lots of good info about hydrogen peroxide and rocket motors.

Fuel grade hydrogen peroxide can be mixed with gasoline 4cc/gal to raise the apparent octane about 5 rm method points. Any more would involve varying degrees of risk. Put the liquid hp into a 1liter beaker with 750 ml of gasoline in it by pouring it or injecting it into the middle of the open topped beaker. Mix it up and then add it to the gasoline. This also makes a 5% average increase in power as measured on a dyno. This is deadly to a diesel.

As for rocket fuel, the post about anhydrous ethanol is spot on.

When you were talking about adding the alcohol to the exhaust your talking about an afterburner of sorts. To increase the exhaust density right.

Before messing with hydrogen peroxide of the concentrations required for rocket fuel, you would be well advised to read and UNDERSTAND the MDS,
( Material Safety Data Sheet), for the substance. - It is extremely hazarous.

Nough said?

As you so rightly point out it is very dangerous and despite what has been said it can spontaniously combust. The lorry exploded in a fire ball during transit, no other material was involved no crash occured just a sudden and very powerful fire ball. At the 80% concentration it can be as unstable a glycerol trinitrate. (nitro glycerin).

H₂O₂ is a powerful oxidising agent. Its instability, and its propensity to release oxygen readily, mean that many otherwise everyday common substances can become fuels in its presence; these are the things that provoke the combustions or explosions described. It is used as a bacterial cleansing agent in pharmaceutical water systems, as it leaves no undesirable residue that might affect the cleanliness of the water. Skin suffers greatly in its presence. So does rubber. "Handle with care".

I know that hydrogen peroxide is extremely hazardous in concentrations in excess of 80%. I was just asking this question.

When you were talking about adding the alcohol to the exhaust your talking about an afterburner of sorts. To increase the exhaust density right.

Before the days of nuclear powered Submarines, the Royal Navy had a "conventional Sub" running on this HP chemical, mixing it with seawater to drive a steam turbine. It was very fast I am told, but it left port (after a visit to London I believe), in the early fifties and as far as I am aware, it has not been seen since.....whether the wreck has been found or not I will have a look at the internet to find out....

Checkout the following link, there were more of them than I thought!!

http://www.chm.bris.ac.uk/motm/h2o2/h2o2h.htm

Extemely hazadous, be carefull.

Yes ask the Russians about their torpedo's that spontaneously explode. Remember the Kursk. It was that sub that blew its front end to pieces.