how to build a bottle rocket launcher?
407939
Here are the instructions for building an actual NASA approved bottle rocket.\n\nI hope this is helpful!
129659
Cut the top off of a milk carton. Glue a popsicle stick to the side of the plastic that reaches well above the carton, glue another stick perpendicular to the first to make an L shape. Add a fabric or other material sail. It will float!
766621
try www.wildimports.com   They have what you are looking for.  They cost a few bucks, but are actually quite good prices for the quality you are getting.  I LOVE cannons!  Get one!  Try the mountain howizter.....\n\nIf you don't want to spend quite that much money, you can always find a Coehorn mortar.  They make them in golf ball size or beer can size.  Put a charge of black powder in one of those babies and it'll rattle the mountainside!  They are fun too and you can get a decent quality mortar for a few hundred bucks.
1143842
Not without a major change in design.  Shipping 50 times the fuel will not give you 50 times the delta-V with a chemical rocket, it will be much, much lower than that, I believe for typical efficiencies, 50* the fuel will get you 4* the delta-V.\n\nTo go much faster you need to increase the specific impulse of the engine, which amounts to increasing the speed at which material leaves the nozzle.  A chemical rocket is limited by how hot it can make the expanding gas.  A nuclear rocket works well because it makes hot hydrogen, which has a higher nozzle velocity at a given temperature than hot water or carbon dioxide.  To go beyond those impulses to very high speeds, non-thermal systems like ion drives are more plausible, but they do not generate very much thrust.
294257
oh that is actually the name of a makeshift bomb or grenade. it is made by using any bottle of alchohol and sticking a scarf or some other cloth in the opening of the bottle. you then light the cloth on fire and throw the bottle of alchohol. when the bottle hits whatever you throw it at the glass breaks and the alchohol goes everywhere on fire, making a pretty effective bomb for pretty cheap. there you go buddy, thats a molotov cocktail. the weapon of choice of the cheap revolutionary...
395979
I dont think you could physically make an actual jet engine that size-there are constrictions on the speed and fuel at that size.  You could mockup on, but it wouldnt have significant thrust- If it's thrust you are after, then you would get much better results from rockets, and they are much easier to build as well.  Its exceedingly dangerous, but I assume you know that already-There are a lot of very good websites for building small rockets.  When considering, be sure to calculate the maximum thrust force you want.  On a bicycle, even a relatively small force can accelerate you-Do not build a rocket based upon your weight, because you arent overcoming total gravity, and you would have far too much force-I would estimate 50-100 pds would be plenty, with less than that as a test rocket.\ngood luck
826337
Its fairly simple to make using a readily available liquid. I'll leave you to search the Internet then decide if you want to make it by yourself or get help from friends
568149
pfft the best weapon to use would obviously be a Rocket Launcher that shoots chainsaws that are uhhh... on fire ohhhh and it homes in on you and.... it turns into a shark and eats you while the chainsaw cuts and burns you then it pours alcohal on you sooo you would be like OWWWWWWWWWWWWWWWWWW! then it drops a really heavy weight on you that .... EXPLODES!
610453
build a basic suspension bridge\nuse baking soda to show gasses \ntake two 1 liter bottles put them mouth to mouth cut a cap to connect them or pvc thredded tube @ hard ware store \nu can show how a hurricane moves thereb will be a" vortex " it is really cool to do \ntry this take a u shaped tube make 2 plungerlike inserts put water in it illustrate hydrodynamics dat all  good luck
708573
Items needed -\n\nPlastic Bottle\nDry Ice\n\nHow to do it..\n\nPut some dry ice in the bottom of a empty water bottle - little chunks of it should be fine. Put about an inch or two of it in the bottom, you dont need much at all\n\nNow here is the dangerous part..\n\nPut some cool or warm water in the bottle, just pour it in almost to the top, leave about an inch or two, now put the cap QUICK and throw it or put it on the ground, it could go off quick, or take a few minutes.\n\nIf will expand and expand until it goes off, so if you think nothign is happending, you are WRONG. Give it at least 5 minutes. If it has not gone off, throw rocks or somethin at it and then it should go off.
441196
Build a mini trebuchet!  Build a mini trebuchet!\nGive egg LOTS and LOTS of padding!
224063
you need to Build Volcano Model... go to this page\nhttp://volcano.und.nodak.edu/vwdocs/volc_models/models.html
475320
You+ll need a large pot, a onegallon vinegar or cider bottle, a 4' or 5' length of plastic tubing (try-airline+ tubing from a pet shop), a balloon or non-lubricatedcondom, a package of wine yeast (not bread yeast), wine bottles,corks, a corking device, and 2 1/2 pounds of honey.First you need to prepare the mixture that will be fermented. Takeyour pot and add the honey and enough water to finish filling up theone gallon bottle. Bring these to a boil slowly. If you don+t wantscum in your mead and it forms on the top, skim it off. You don+tneed to boil it for any length of time, you just need to bring it up tothis temperature. Boiling for a while will release a lot of scum andadditives which you can get rid of right now and it will also allowthe mead to age more quickly. However, some of this -scum+ as I+vecalled it is made up of those very things which can create flavornuances. I don+t boil mine. When you decide it+s done, let it cool longenough so it won+t melt the plastic tubing, then siphon the mead intothe gallon jug , cap and let cool overnight. The gallon jug is yourprimary fermenter.Did you sterilize the pot? the bottle? the cap? the plastic tubing?No! Pour it out and start again - yes I am serious.Once the mixture is cooled to room temperature you will need topitch the yeast. Get a small cup half full with warm, but not hot,water and add the yeast. Let it sit for about ten minutes and absorbwater and liven up, then pour it into your gallon jug and mix it in.As of now your honey and water mixture is now being converted intomead. However, this will take about two weeks, perhaps more, tocomplete. During this time the mead mixture will bubble and foam,and this is what the balloon is for. Cover the top of the bottle withthe balloon and about an hour later, when the balloon has started toinflate but has not become too stretched, poke a few holes in it witha pin. (I understand this may make you wince if you are using acondom.) This balloon takes the place of a fermentation lock andallows the gas to escape while not allowing air in, thus keeping thefermentation bottle sterile. The holes may become clogged withfoam and you may need to poke a few more. Just remember thepurpose of this and use your common sense. I+ve accomplished thiswith plastic wrap and a rubber band, but I wouldn+t advise others totry unless you+re fond of unmet expectations.About two weeks from this point the balloon will cease to be greatlyinflated and will eventually go limp. When it has been completelylimp for a few days and the mead is clear rather than cloudy,fermentation is over. At this point sanitize your wine bottles andplastic tubing and bottle the mead. Be careful not to get the yeastinto the bottles as it+s not exactly tasty stuff. I stop about an inchbefore the bottom of the primary fermenter and we siphon off thelast inch into cups and toast the new mead. My mead has been verytasty at this point, other people describe theirs as tasting like paintthinner. In any case, you may not mind a little yeast in your cup now,but don+t inflict it on yourself in the future by bottling it.Wait two to six months and then enjoy. Since the above recipe has noadditives which would hasten aging, it may take a while for it tobecome truly fine mead, perhaps years. There are a lot of chemicaladditives that one can use to improve the flavor and process. Themost common and important addition is a teaspoon of yeastenergizer or yeast nutrient. Others include grape tannin (1/4teaspoon), malic acid (2 or 3 teaspoons), tartaric acid (1 to 2teaspoons). I recommend all of these chemical additives in your firstbatch, but if you can+t find them you can make do with naturalingredients or nothing at all.One can also add slices of fruit, raisins, or berries for flavor and inplace of grape tannin. One recipe I know of adds some apple jelly. Afew lemon peels will substitute for malic acid and a spoonful ofstrong tea will do replace tartaric acid. Hops are a common additiveand
732007
I have made 2 liter bottle rockets using water, a tubeless tire valve, a bicycle pump and a 2 liter bottle.  It goes about 100 feet up if you do it right.
490257
Get two plastic bottles and paint one black and the other white.  Put one of those liquid crystal temperature strips on each one to easily monitor the temperature and fill them each with boiling water.  Screw on the lids and you should see that the black painted bottle cools down faster than the white one.
67074
You mean like a model rocket?\nTry Estes Industries at the site below.  They have been in the business for decades and have a wide variety of models from which to choose.  Check with your local laws first.  These are not legal everywhere.
632762
There are various sites that explain how to build a paper blimp, just scale them up, as far as material goes you need an airtight flexible material that isnt subject to uv attack, mylar is the favorite.