I was thinking of this, but I couldn't come up with the best decision. I cannot use rotating hubs and I need some stable framework sticked into the dropouts. This is an example of what I would like to achieve: http://img353.imageshack.us/img353/5509/snowbike8hg.jpg
215812
You might try reading through http://www.icebike.org. If you don't find an answer there sign up for their email list and ask the email list community. ( Just to let you know how active the list is, I have received 3556 emails since last August 2005 from this list from people all talking about winter riding, etc and it literally saved my bacon from getting frostbite, hypothermia, etc this last winter when I made my first attempt at commuting in the snow on a bicycle)\n\nYou could also try searching their site at http://www.icebike.org/search.html\n\nYou can search the email list archives at https://listserv.heanet.ie/icebike.html ( you have to sign up to do this )\n\nSign up on the list at http://www.icebike.org/icebikelist.htm\n\nEnjoy :)
124327
It's been forever since I've done it, so I can't give you an actual schematic (try a search engine for that.) I will give you some tips from my science olympiad glory days, however. I assume you're trying to lift the most weight?\n\nMake your sails out of the lightest material possible and with as little re-enforcement as you can get away with it. That way the energy going into turning the sails is minimized and they can rotate faster (and hence do more work.) Depending on size, posterboard or even paper with a balsawood backing usually works well.\n\nDo you know what will be turning the windmill? If it's a fan, try to find one like it and test against that. If you're using natural windpower, this will be harder to do. Only re-enforce the sails enough so they won't get torn apart.\n\nAs far as the string lifting the weights goes, friction is GOOD. You don't want it slipping and costing you energy and time, if time is an element. In all the other elements, friction is BAD. Break out the ssandpaper if necessary.\n\nAll of this is probably common sense, but I hope I did some good. Best of luck.
111334
Don't hold your breath. Our beloved Axle has gone loopy.\n\n|||||||||||\n(¤¿¤)\n''''O''''
393492
I have yet to find such a site that is not oriented to one side or the other.\nSo take what you read on the sites in these links with a grain of salt. Most of them a BIG GRAIN!
523551
i want to make a system that gets mounter to the passenger front bumber of my car, so when im stuck in traffic and some _hole feel he deserves to drive in the emergency lane, the laser will burst a hole in his tire, and give him a reason to be in the emergency lane.  Some issues with this system is the timing of when to fire the laser, how much power the laser would be.  You dont want to accidentally fire at the wrong thing, so these issues must be addressed first.  I think thats pretty innovative.\n\nwhilst working on my M.E. senior design project, my sponsor (an artist) wanted to make a dynamic hologram depicting a full COLOR rainbow..  Yeah, I know...  It made for great jokes the entire year.
621014
You would need at least two pedals, one to scroll the alphnumeric characters and one to choose....this would be very time consuming.\nNone of my business but what are you trying to achieve? There may be better options....
195420
attach a metal brack from the underside of the ski up to the outer portion of the axle of the bicycle
219212
Use the bike that fits.  I would be inclined to set the pre-load on the suspension fork pretty high to minimize bounce while standing and climbing.  The only other disadvantage is the weight, but fit is definitely more important than weight.
27552
tuning and screwed over are two completely different problems.  Get a manual for the snowmobile...not the owner's manual...a repair manual and it will tell you how to rebuild your perticular carb
369736
Given a rotating hub or wheel all the centrifugal forces are along the radii from every point on the hub to the center. Because of circular symmetry, all the these forces will cancel; one pointing up is cancelled by one pointing down. Therefore the net external force is zero; there is no way the linear motion is influenced.
618981
Epicyclic gearing tends to fall over as you scale it up due to centrifical (centrifugal) forces of the rotating parts trying to accelerate outwards.  I'd be inclined to use a discreet gearbox off a motorcycle, something like the royal enfield bullet and chain drive.
55631
Yep.  A fan will do the trick, or if it's a vehicle used for a specific purpose (like carrying something from set point A to set point B) a pulley system would work.  I don't know the exact equations involved, but the fan's windpower strength should be (obviously) greater than the mass of the vehicle, and should have some kind of failsafe cutoff switch as well as a means to decrease power to the fan, for (again, obviously) safety reasons.
194815
I believe one of these is what you need: http://www.tigerdirect.com/applications/category/category_slc.asp?CatId=464&Nav=|c:81|&Sort=3&Recs=10
98400
http://hyperphysics.phy-astr.gsu.edu/hbase/hframe.html
178627
We used to build a Go-Kart frame similar to the store bought and make enough room for the Engine to mount behind the Seat. IF, it not have electric start take into consideration room to use the kick starter or mount a Rope Pull maybe using a compression release. Make a rod to run where you want the hand shift and use pedals for Clutch, Brake and Gas. Good Luck, it a fun project and you should be able to use a nice size tire, look for a cost effective Tire set up.
545952
i just build my snowboard box this last weekend. last year i built a 16' x 1' x 4' box and i had used plexiglass and it cracked and warped with the temperature changes, so maybe that isn't the way to go. I'm guessing you should go with treflon or perspex? or id say use the stuff from the hockey rinks which probably rang from 60$-80$. idk if i helped any.
150962
Try this site:\n\nhttp://www.recmanagement.com/features.php?fid=200305FE02&ch=3\n\nAnd also, this site gives a step by step demonstration using pictures.  As to where to acquire the materials or how to rent a polaris to move the material, I think might be another Yahoo! Answer.\n\nhttp://www.aukebaylandingcraft.com/BuildingTrails.html\n\nHopefully, this gives you some idea of the direction to go.  Good luck!