Help with science.

[Rustler Rulz]

hi
for my science project i am building a model windmill (alredy built that part) to power a small water pump but the problem here is i dont know how to make the PUMP! i need good marks cause this gose towards my yr10 certificate (dont know if u have it in the USA).
so how to i make a good water pump with good compresion or can i use a alternative? like a vacume pump?;)

all help apreciated

[cuda_tmaxx]

you could use the Archimedes' Screw (http://www.informit.com/articles/article.asp?p=413663&seqNum=4&rl=1) scrowl down to homemade water pump and there is a how to

[Rustler Rulz]

yeah thanks but i found a eaiser way i am going to use a saop dispenser pump lol i dont know why i didnt think of it earlier

[wattage]

Or, you can use a trust ol' fish tank pump.

:fear: TheNinja

[Nitronaught]

yeah thanks but i found a eaiser way i am going to use a saop dispenser pump lol i dont know why i didnt think of it earlier
What is the size of the Windmill?
How much water do you need to pump?
You could actually use an old Glow motor, Use the carb hole as your water inlet, close off the exhaust and put the output pipe from the glow plug hole. Just sink the motor in the water so it get's in the intake of the motor (no carb).
That's if you have an old beat up glow motor lying around.:cool:

[Badco]

Don't know if that would work....Water is pretty much incompressable (vapor lock anyone?). As soon as that windmill got the head to close off the exhaust, it wouldn't move any farther.
Maybe I'm misunderstanding what you are talking about?

[Badco]

OH OK! Got ya. I don't think you would actually get water to pump. As soon as the piston moved down, it would pull the water back in. You would need a high and low pressure side to make it work I think.

[Badco]

Hate when the post get all out of order like that!!:mad:

[superUEmaxx]

his idea is to close the exaust, use the carb as the inlet, and the glow plug hole as the outlet.

but when its on it's downstroke, wouldn't it pull the water back in from the outlet also?

[cuda_tmaxx]

unfortunatly the glow plug motor wouldn't work. The crank limits how much air/fuel can go into the crankcase. so it would take a while to build adaquete amount of water to fill the entire cylinder. if this were possible then you would run into problems with the piston downstroke trying to compress the water in the crankcase. all in all good idea but i do not believe it would work. and as superuemaxx said it will just suck the water back down unless some sort of reed valve is implemented

[mathewplunkett]

My dad has a working windmill on his farm and the pump is extremely simple. It's just a tube with a one-way valve on the bottom. Inside the tube is a plunger that has a rod running up the tube to the windmill and it goes up and down as the windmill turns. The rod is run through a hole in the middle of the plunger and has about 3in of play. The rod has a rubber stopper on the end under the plunger and a plate welded to it above the plunger. When the rod pulls the plunger up the rubber stopper stops up the hole so the water is pulled up and when it pushes down the stopper is pushed down until the plate makes contact with the plunger so water comes through the hole. Hmm. This is confusing. I'll try to put a picture together and post it.

[mathewplunkett]

Hope this helps. I can try to explain better if you need.

http://www.mkce.org/images/waterpump.jpg

[savagenomore]

you could use an engine that has intake and exhaust valves. EX: a 4 stroke engine from an old lawn mower, i dont quite know how to rig it up but i got the idea from that show that use too be on TLC "junkyard wars" man, i miss that show.

[savagenomore]

oops............

[Rustler Rulz]

nah my soap disperser works but i need to adjust the gearing and it will cost too much to get a gear box so i changed the experiment
thanks for your help anyway