Recent content by JBM1234

Hello everyone, Can the mass flow rate of air by a propeller connected to an engine through a small tube change if the rpm of the propeller is increased?

In the skirt, there should be a hole under it to let air flow out, the distance between the hole and the floor is callled the clearence height. Ac is called the cushion area, so, if I make the hole bigger and bigger, the cushion are will be reduced.

I agree, however, in the formula Pa = hc lcu Dc ( W / Ac ) 3/2 ( 2 / d ) 1/2 uses hc which is the clearance height, defined as the height between the floor and the gap on the skirt. In page 522 in the following link is a diagram where u will see hc shown...

Thank you all for your help. I think that, with the formula I have, if I cut a hole in the skirt, my experiment could have two paths. I could either look at the effect of an increase in the cushion area ( that could be done by cutting a bigger hole every time) to the power supplied to the motor...

Yes, but my experiment is to se the relationship between the power input against the height to see if the power supplied to the motor actually makes the hovercraft hover higher

There is supposed to be a hole under in the skirt to let air flow. Without the hole, there is no clearance height to be measured I think.

I wanted to measure the height because there is an equation which related power with height which is: Pa = hc lcu Dc ( W / Ac )^3/2 ( 2 / d ) ^1/2 http://books.google.ca/books?id=Blp...AA#v=onepage&q=theory ground vehicle&f=false" chapter 8 When I found this equation I thought it would be easy...

I measured the total height, how far away it was from the floor

<< Mentor Note -- thread moved from the technical forums so no Template is shown >> Hello, I built a hovercraft not long ago for an experiment. What I did was applying more power to the motor and looking at how high the hovercraft could go. However, the formula that I was planning to use, uses...

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