If John McClure is still not convinced. here's a simple test he can try
in his own garden.  Take a 50-foot length of standard garden sprinkler
hose and blow down it, then take a 25-foot length of the same hose and
blow down that, and keep reducing the hose length until you're down to
1 foot.

Notice that, the shorter the hose, the easier it is to blow; the longer
the hose pipe the harder it is.  Now, whether your blowing a small rank
of pipes or a full sized theatre organ, it doesn't matter: a long
delivery pipe causes drag which a short one doesn't.

A theatre organ capitalises on this effect with the tremulants: the
elastication of the wind in along small bore trunk greatly improves
the "bounce" effect, which of course, is so desirable.

Keep it short and good luck!

Paul Camps

 [ Wierd and wonderful interaction may occur with long feeder pipes
 [ when the pipe length supports resonance at or near the tremulant
 [ frequency.  For example, a 5-Hz tremulant frequency will resonate
 [ at one-quarter wavelength in a pipe roughly 56 feet long (17 m),
 [ or half-wave resonance at 112' (34 m).  I don't know if the
 [ tremulant can be adjusted with these coupled resonators; maybe
 [ the pipe length must be increased to shift the resonance.
 [ -- Robbie