Anyway to produce alot of oxygen quickly for a motor?

Quote: Originally posted by HgDinis25

If I understood correctly, you want fast generation of Oxygen to actualy make the trhust instead of the combustion of Oxygen, right? The best method is always using Hydrogen Peroxide. 35% works great. Just put it in a container. Whenever you need thrust you open a valve that allow the H2O2 to fall or slip into a catalyst (manganese dioxide for instance) and there you go, trhuuuuuuuuuuuuuuuuuuuust.

That dosnt sound too bad , it also means I can use a one way valve to the catalyst container, I am going to use the oxygen to burn the acrylic tube like in a hybrid rocket.
I will drill a hole through a solid acrylic cylinder and feed the oxygen into one end and light the other, so the oxygen will be used for combustion of the acrylic. I have a load cell I can use for testing of the exhaust shape, my problem is the short distance of the track. I know over longer distance I could thrash CO2, but short distance is harder because I will need a fair bit of oxygen quickly.
Apparently in class they have done pop bottle type experiments with CO2 and so I think most will go this way, but the sheet I have dosnt say I cant use other materials or combustion. The way you explain it above makes me think I should be able to control it fairly well from a safety perspective, the hybrid motors I have looked at (you tube) all seem to go out quick enough when you stop the oxygen.

Idea for how to use H202 and a catalyst for a ground vehicle's rocket:
A piston and cylinder is built so that the piston rod is a rack and pinion with an electric motor pushing it forward. A removable one way valve that releases at a certain pressure is placed on the other end, and unscrewed to pour the H202 into it. When the electric motor is turned on, the piston should move forward and cause the valve to release and spray a jet of H202. A cylindrical block of a catalyst(manganese dioxide?) is drilled through and placed between the acrylic cylinder and the piston's valve. Nichrome wire is placed into the rocket's nozzle just before the acrylic block, and electronically triggered to glow before the piston shoots the H202 through the catalyst block's hole, causing hot oxygen to shoot down the channel and start the rocket.I hope this makes sense.
A low power solid fuel rocket engine would be much easier though .
What school do you go to that lets you actually build things like rocket cars? I have to figure this stuff out on my own.

I dont know if they do let us use rocket propelled cars, I know that they used citric acid and calcium bicarb in a pop bottle for the demo, and I am pretty sure they assume most people will copy this for the race.
But we are given a sheet that details what we can and cant do, it says we cant use electric motors to power it, we cant push it at the start line etc etc.
They assume most of us are pretty stupid and it would never occur to them that someone would use a solid rocket for fuel or a hybrid, also I rarely go into the school. They dont have any idea I now have an interest in chemistry, but the rules say nothing about using pyro or anything else so by the time they have any idea what powers my car it will be off down the race track.
To light it I am thinking iron wool soaked in a little WD40 and a 9v battery, the guy with the small co2 cylinder isnt puncturing it, he has taken the nozel etc out the drinks maker and I will sort him out a servo on a timer that will turn the valve on for him (3 seconds then on).
I am likely to get disqualified for sure (a bit unfair) but its worth it to see the look on there face. I have done a few tests and while not great (the H2O2 was only 3%) it shows promise . I have got dad to order 35% H2O2 for me.
As I am using a micro for part the control system I might add a load cell strip and put that around the reaction container (a chemical container) when its full and starts to deform outward I will get the micro the release the valve via a servo motor turning the valve (stainless steal use for aquarium air lines).
Its a shame they are not using the corridor (much longer) and just timing the runs one by one.
I do have the advantage that mine is being built outside the school (everyone else is doing most of it in class), so its unlikely they will know what I have built until I power it up and by then its too late.
We are always being told ALL WE NEED TO KNOW IS ON THE WORK SHEET SO READ IT. They hate answering questions so I figure I have done as asked and read the sheet several times, it does suggest CO2 is used via citric acid and bicarb, but it dosnt say it must be used, infact it suggests we "Find other chemicals to produce thrust" That to me is the green light!
I cant get hold of nitrous oxide easily and in a form I can use, thats why I went with H2O2.

Its a bit of a protest as well, I recently got my biology mock exam back and I got marked down on a few answers unfairly, for example the one that pissed me off was name the smallest type of living organism, now I know they wanted virus, but in my answer I argued that seeing the first question on the paper was to name the missing parameters that define life, then using there parameters for life it was bacteria. I explained that had the parameters been different I would have used Virus or even prion but these dont fit the living parameters in the first question so virus and prion are excluded and the answer has to be bacteria.
I got 0 marks for it!!!!
There were several other questions I got the same treatment! so I got a low grade in biology even though my answers were all correct!

Name the organism responsible for fermentation in wine! I named 3 (non were yeast) and explained that seeing as they didnt name the fermentation product then I was assuming they wanted any of the organisms responsible for fermentation products in wine and not just Ethanol, I also pointed out that clostridium also ferments to ethanol in wine. Again I got 0 points

Quote: Originally posted by Bert

OK- have a look at this, too: http://www.aeroconsystems.com/motors/Screamer_folder/Screame...

That is really cool! but I dont think the whipped cream thing is available in the UK, I can get large cylinders of it but nothing that small, I dont know why but maybe nitrous oxide is controlled here?? I would love to be wrong.
The graphite nozell has given me some ideas , maybe I can find a way to fill a small CO2 cylinder with Nitrous from a larger cylinder. Need to experiment to see what kind of burn time I need, short but fast is probably best.


GENERAL NOTE
I havnt ignored Berts questions, but personal details etc I only really answer in u2u's so I did answer Bert just not in the thread . I didnt want you to think i was rude and ignored people


[Edited on 22-12-2014 by Little_Ghost_again]

[Edited on 22-12-2014 by Little_Ghost_again]

I checked and nothing online (public anyway) about safety guides, I tried to log into moodle at the school but it seems over holidays there is no access as I cant log in!!
I will post the sheet when school starts again as I dont have a scanner but they have a electronic version of all work sheets on moodle (thats how I get them).
The safety stuff is very very handy, I am thinking long and hard about the safety.
I would have more confidence in this if they used the bloody corridor! Its much much longer than the hall so by the time I reached the end little energy if any left, the hall is another matter, short distance and HARD wall at the end! So quick hard burn, the controls I havnt really though much about.
This isnt an oversight its simply that I have alot of electronics experience so my confidence of building a complex safety circuit means its what I will look at last (sort of).
At the moment I am undecided if this is practical seeing as the wall is only 5-10 meters from the finish line, I dont mind destruction of the car on impact with the wall as long as the H2O2 is all used up and the motor is out.
But on the other hand..............................
I should be able to do this, if I test and test and build in enough safety then it should be ok......................................................

Yeah ok I need a plan B

I will be back with plan B

[Edited on 22-12-2014 by Little_Ghost_again]