how to build hovercraft, i need to know?
397410
use a CD and the top of a soda bottle (both the cap and the very top) glue the cap to the CD (you need a VERY small hole in the cap) and put the balloon on the very top of the bottle, use that to blow the balloon up
401445
please go thru the following pages\n\nhttp://science.howstuffworks.com/maglev-train.htm\nhttp://science.howstuffworks.com/maglev-train1.htm\nhttp://science.howstuffworks.com/maglev-train2.htm\nhttp://science.howstuffworks.com/maglev-train3.htm
1145870
You need two make two graphics, one regular and one for a hover over.\n\n1. Create a CSS with the following\n<!--Start-->\n#hoverover1 a\n{\nposition: absolute;\ntop: 156px;\nleft: 30px;\nwidth: 185px;\nbackground: url(image1);\nbackground-repeat: no-repeat;\npadding-top: 64px;\nheight: 133px;\nheight: 0;\n}\n\n#hoverover1 a:hover\n{\nposition: absolute;\ntop: 156px;\nleft: 30px;\nwidth: 185px;\nbackground: url(image2);\nbackground-repeat: no-repeat;\npadding-top: 64px;\nheight: 133px;\nheight: 0;\n}\n<!--Finish-->\n\nNow change the first URL to the main image, and the second to the rollover.\n\nThen add this to your page\n<!--Start-->\n<div id="hoverover1"><a href="link" title="The Experience"></a></div>\n<!--Finish-->\n\nNow to make more than one, change "hoverover1" to like "hoverover2", "hoverover3" and etc.\n\nChange the URL, and you are done.\nAlso change the positoning, size, etc. of it all.
11475
Well it is pretty easy to build a simple motor. There are instructions at this website.
474005
http://www.ehow.com/tips_2196.html
31736
For links to websites related to your question, go to \nhttp://www.ihpva.org/people/tstrike/building/trikelinks.htm\nRick Horwitz has detailed intructions and plans online at http://www.ihpva.org/com/PracticalInnovations/index.html\n Add widest wheels and fattest tires u can find for beach.  Still probably not good on beach due to limitations of trike design.
291775
what is a hoverboard?
326754
Buy this book:\n"The SAS survival Manual"\n\nYOu will learn to build structures from debris, rocks, etc. Some pretty cool structures in there as well as some other useful info.
902905
Ok. this is simple. u need to know about buyoancy, like how air is lighter than water. all you really got do is put some small weights (ex. paper clips, rocks, etc) in the bottle. have it so that it will just barely float. then cut a hole to the side and insert the end of a tube in it. make sure it is water tight. then place it in a tub. it shold float, when you suck on the end of the tube, it should take some of the air out making it less buoyant, and therefore it will sink. there are also many other ways to do this that will make it function more like a real submarine like putting the bottle with weights inside and somehow add pressure to the the outside of the tube to compact the air inside the bottle, causing it to sink. good luck on your project
286338
During the 1950s, an Englishman by the name of Christopher Cockerell developed and patented the first hovercraft. For his contribution to the British people and the Queen, he was knighted and named "Sir" Christopher Cockerell. Soon after, British Hovercraft Corporation developed the first commercial hovercraft for passenger transport across the English Channel. With the ability to carry up to 400 passengers and 50 automobiles, these passenger hovercraft have operated since 1968 and have carried more than 30 million passengers and 5 million automobiles.\n\nSafety matches were invented by Johan Edvard Lundstrom of Sweden in 1855. Lundstrom's new match was the first simple and safe way to make a fire. His new safety match could only be lit by striking the match against the specially-prepared surface that came attached to the box. Lundstrom put red phosphorus on the rough striking paper (on the outside the match box); the other fire-starting chemicals were on the match's head. Previous matches gave long-time users an ailment called "phossy jaw;" this was a painful and deadly disease caused by the older matchs' yellow phosphorus that ate into the users' jaws.
917846
Lots of variables here. Do you want one that will move with directional intent, or one that just floats?\n\nThe simplest method for making a "hovering" vehicle would be to take the vacuum engine, mount it onto a curved shield, with the curvature facing down. Make sure your shield is a very light material, balsa wood works, i suppose.\n\nIf you know where the vacuum's intake and output valves are, then it's easy. make sure you make a hole for the output, and secure the engine to the top of the shield. Turn on the engine, and watch the contraption float around aimlessly. It's basically how a air hockey table works, except in reverse.\n\nEDIT: one important detail. Are you trying to make a hover car strong enough to hold your weight? Because that would need one hell of an engine.
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.
21544
Here are a few:\n\nhttp://www.pcmech.com/byopc/\nhttp://www.daileyint.com/build/\nhttp://www.waterwheel.com/Build_A_PC/build_PC.htm
962416
For the Do-it-yourselfers out there, here's how to change your own oil!\n\nYou will need the following:\n\nOil suction pump, vacuum canister type recommended\nE12 Torx bit socket\nMetric sockets (optional)\nRatchet\n3L Sea-Doo 5W-40 Mineral oil for SC, 10W-40 for NA\nNew Oil Filter\nNew oil filter canister cover and bolt o-rings (optional)\n\nMake sure the craft is level. Start the engine and let it idle for 30 seconds.\n\nOPTIONAL\nUnsnap the cooling reserve tank from the seat brace, then remove the four bolts securing the seat brace to the hull. Set it and the air duct attached to it, off to the side.\n\nNext, use a small tube with your oil pump (we used Sea-Doo RAVE valve lines) and feed it down the dipstick tube. Remove the oil fill cap and suck out all the oil you can get, which will be 3L.\n\nNext, use an E12 torx socket to loosen the oil filter cap located right behind the engine. Pull the bolt straight up and gently wiggle the cap off with it. The cap may be difficult to remove, you can pry gently with a screwdriver between the canister and cover if you need to. Remove the old filter and replace it with a new filter. If the o-ring on the center bolt or the o-ring on the cover is damaged, replace them also. Lubricate the o-rings with engine oil and be sure to center the filter and cover while installing, making sure the o-ring lines up with the step on the filter.\n\nRefill the oil system with 3L of Sea-Doo oil and replace the dipstick. Replace the seat bracket and coolant reserve tank.
373091
just chk out these sites these should help\n\nhttp://www.wildtoys.com/MMMPage/MMMresources/LiftingBody/index.asp\n\nhttp://www.nasaexplores.com/show_k4_teacher_st.php?id=030107172620\n\nhttp://pterosaur.stanford.edu/log02.html\n\nhttp://www.greathobbies.com/rcsailplanes/beginners/rcsailplanes/index.php?PHPSESSID=7aba07b72d725d9326880171abacd11f\n\nhttp://vulpecula.us/simple/archives/2003/10/17/flying.php\n\nhttp://kohlin.com/air/soar-faq.htm\n\nhttp://72.14.203.104/search?q=cache:iOVvoiekkP8J:teacherlink.ed.usu.edu/tlnasa/units/Aeronautics/Part03.pdf+is+balsa+wood+gliders+better+than+styrofoam+gliders&hl=en&ct=clnk&cd=23\n\nmng.1432@gmail.com
956561
Build a Van de Graaf generator.  Read the following article in Wikipedia:
223669
best site for help.\n\nhttp://www.scioly.org/obb/index.php\n\nLook for posts about the "scrambler car"\n\nThese will be advanced designs for competition, but you will get the general idea of how to build one.