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Posted for "Marko Bewersdorff" <marko@bewersdorff.com>:
talking music instruments: a trumpet has a lot of 180 degree turns in the
resonace 'tube' but a fine measuring instrument such as the ear seems not to
hear bad distortions. An organ pipe looks more majestic straight than
looking like a tuba, plus building it straight is easier.
The key is to have a large(ish) radius in the tube if it needs a bend.
Resonances are a problem when you go to a suden change in diameter like
opening up the diameter to the resonance chamber, a sharp right angle turn,
or alike.
Try to build no cheating radius into the manifold like if you want a narrow
wrap over intake, don't cut the 180 degree bend short at the bottom to bring
it closer to the engine.
Might be old news, but that's all I gathered so far.
Marko
I question it based of theory; not on fact. There is a reason why pipe
organ pipes are straight, and why Mazda used straight-in tubes on their
4-rotor that won at Lemans.<<<
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