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Setareh Aghelmanesh (Setareh)
New member

Post Number: 1
Registered: 3-2007
 Posted on Saturday, March 10, 2007 - 10:11 am:

hi
how should i optimize my design for maximum velocity?

Simon Quellen Field (Sfield)
Senior Member

Post Number: 1652
Registered: 12-2004
 Posted on Saturday, March 10, 2007 - 1:02 pm:

By experiment.

Try more heat, or lengthen the straight parts of the pipes.
Other ideas will come to you, such as making the hull long and thin,
or a catamaran, or a planing hull.

Setareh Aghelmanesh (Setareh)
New member

Post Number: 2
Registered: 3-2007
 Posted on Wednesday, March 14, 2007 - 11:11 am:

I did lengthen the pipe largen it and lot more of these
but when i want to find out which one has more velocity with getting the time in same distances , every time i find diffrenet answers , the velocity will changed , sometimes the short one will go faster and sometimes the longer
please tell me what to do ?

Simon Quellen Field (Sfield)
Senior Member

Post Number: 1660
Registered: 12-2004
 Posted on Wednesday, March 14, 2007 - 11:32 am:

You can better isolate the independent variables, or you can average
out the results of many runs, or both.

If you change nothing, and get varying results, you have not isolated the
independent variables. Make sure the heat is constant, the friction is
constant, etc.

If you can't control for these things, make them average out by running the
experiment 100 times and use the average. Learn about standard deviations,
and how to tell if the results are statistically significant.

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