Posted by Klaus on September 20, 2000 at 19:50:25:
In Reply to: a technical question posted by Paul Scott on September 20, 2000 at 16:02:34:
Sorry, but I have to disagree with the hitherto replying authorities.
First of all it is very difficult to measure the effective length of the 2nd valve, as you will have to incorporate the extended airpath inside the piston as well.
And the addition of the 2nd loop length to the lenght of a major third loop (=2+3) will not create a proper fourth loop. For pure math reasons.
Under the condition of a temperature of 20 centigrades (is that about 38 degrees Fahrenheit?) and a tuning note of A=443Hz, then the proper addition to your major third loop, so it will act as a standard fourth valve loop will be:
a 8.62 inch lenghtening of each branch.
Klaus