kerf port math

[Swaggasaur]

i was wondering how i would calculate port when doing a kerf.

like using torres, how would i enter it into the program?

thanks

[stipek]

some say 1/3 of the kerf length is actual port length. it depends on how large the kerf is. if its an inch then it is basically noneffective. another rule of thumb is 1/2 the length. i haven't found any published literature confirming any calculations. for box building purposes i add 1/2 of the kerf length to the port length and the tuning should be close to the calculated tuning in torres.

[ReDDruM]

half of the kerfed part

[nCOMP1337]

ive also heard half of the kerf added to port length and tuning should be about right

[RAM_Designs]

half of the kerfed part

This.

[Swaggasaur]

can someone give an example?

[STEvil]

If your kerf is 12" long then 6" of it is added to port length.

Or 9/4.5, 8/4, etc etc etc.. you know, that thing called "half"