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Old 5th February 2005, 04:34 PM   #1
sunil is offline sunil  India
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Default MJK worksheets – rectangular port help

Hello,

I need help on modelling the ports in MJK’s worksheets. How does one model the opening size for a port, that opens at the end of the closed line, into an open rectangle ?

An example is the “Peerless pipes” by Bob Brines. The opening is a rectangle of size 1 ľ” x 9” width. With ľ” panels, the volume is 11.82 cu.in. Would that be a circular opening of 2.24 inches, if I used the “Ported box” or “ML-TQWT” worksheets ?

Thankyou,
sunil
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Old 5th February 2005, 08:26 PM   #2
frugal-phile(tm)
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If you are doing a continuous taper use the ML-TQWT sheets... the important thing about the port is its area & length -- within reason, its shape makes little difference to the modeling.

Think of the port as a restricted terminus -- in the sections worksheet you would just decrease the x-section of the last section.

dave
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Old 5th February 2005, 09:03 PM   #3
sunil is offline sunil  India
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Dave,

With a continuous taper & the ML-TQWT can I terminate the line into an opening, keeping the "port length" the tkness of the cabinet & adjust the rectangular opening as required.

sunil
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Old 5th February 2005, 09:58 PM   #4
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Quote:
Originally posted by sunil
With a continuous taper & the ML-TQWT can I terminate the line into an opening, keeping the "port length" the tkness of the cabinet & adjust the rectangular opening as required.
yes... you might not be able to achieve an apptprite port tunung with the restricted port length (ie wall thickness)

dave
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