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ed_ma61
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May 2002

Re: Help needed with designing...

Mon, 10 May 2004 09:15

takai wrote on Mon, 10 May 2004 18:38

But the thing is what would then happen if you were to then enclose the quad bells/trumpets in an enclosure and pump that full of +ve pressure (ram air/cai). I assume that would change these calculations greatly.

takai...

i dont think the act of 'enclosing' would make any difference to the calculations whatsoever, as theyre only concerned with open pipe harmonics, thus, beyond the end of the bellmouth nothing more is considered.

as jase suggested, perhaps the role of altered pressure and the resulting changes in harmonic velocities could muck things up, but certainly not 'greatly'

as ive read many times, maths only seems to get you so far in designing these things, but its atleast a place to start

jase - got your email, and am waiting on a zip file of 400 odd relevant links, ill pass it on when i get it Smile

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