Recent content by arthuritus

Well, instead of mucking around with calculations I've decided to approach it the other way. I built a manometer, and used it to measure the maximum pressure that my leafblower can produce, which is in turn the maximum pressure there is going to be inside my skirt. It worked out to be around...

How do you know how much static pressure you have in a hovercraft? I can work out velocity pressure alright, but how the heck do you do static pressure? I've asked heaps of people, but nobody seems to know. Can anyone help me here? We can make it really simple. Say a circular 1m^2 hovercraft...

I'm trying to exactly the same thing, and with great difficulty. I'll tell you where I'm up to so far huh? Total pressure = static pressure + velocity pressure. To clarify, static pressure is what you find in a blown up balloon, and velocity pressure is what you feel when you stick your hand...

Yeah, I'm trying to figure out the same thing, but I have no idea how to work out the pressure. If my engine output is 780m^3/h, where do I go from there? I can do the velocity pressure, which works out to about 2 kg, but I am stumped when it comes to the static pressure. Anybody know?

Hmm, I've just figured out that all my calculations were wrong. Perhaps I should be working with m^3 instead of m/s? :confused:

Also, you know how that if you make the base bigger it'll be able to lift more, but won't float as high off the ground? Is the amount of floatiness measured from the bottom of the skirt or is it the total air cushion? Is there any way of calculating how much your float height is going to change...

Yep, that seems to figure. I was amazed; I made a rough prototype today with a .75m^2 circlular base, and it could comfortably lift my 80 kg brother. I think my leafblower was churning out about .3629 N/cm^2, which means with a 1m^2 base it should be able to lift about 360 kg?, provided there's...

I want to know how changing the area of the base is going to affect how much weight it can lift.Would I be right in saying that to calculate velocity pressure in N/m squared you use the formula VP=0.6xV^2? In my case, VP = 0.6x77.7^2 = 3622.37 N/m^2 Is this the right formula to be using for what...

Hummm, I'm doing a hovercraft for my science fair project too. The idea is to make a self-contained hovercraft capable of lifting a person. I'm going to be using an electric leaf blower, electric because they are MUCH cheaper than petrol ones of the same power to weight ratio. The only thing is...

Small scale production What's the best way to produce hydrogen on a small scale? Taking into mind I don't want to be working with dangerous currents and have no access to any kind of concentrated acid. What's the best kind of readily available power supply to use for electrolysis? Also, isn't...

Try searching for some of mrjeffery321 (or something like that) He seems to be quite knowledgeable about these things

Oh, and another thing, isn't it possible to make thermite using something else like hemitite? Isn't that just another isotype of iron oxide?

I recall that with a little care you can make large quantities of relatively pure rust by mixing steel wool, bleach and vinegar together. Once the rust has formed dilute it with lots of water in a bucket. Leave it to settle, then siphon as much water as possible out. The remaining sludge you can...

What is the best readily available power supply to use to make hydrogen? Taking in mind i don't want to be working with dangerous amounts of current. Another thing is I don't want to short circuit any thing expensive. I was thinking of using a car battery charger; you just plug it into the wall...