I' curious, how does an actual (flow?) F trigger work? I have an idea of how the rotor valve works but I can't figure out what Happens inside the cone thing of the axial valve when you pull the trigger
And is an axial valve any better than the rotary valve in terms of intonation and such? Because the tonality can suffer a bit if the air has to make a super sharp turn, such as in a rotary valve that has roughly a 90° bend.
Triggers
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ttf_xspartacusx
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- Joined: Sat Mar 31, 2018 12:35 pm
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ttf_BGuttman
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- Joined: Sat Mar 31, 2018 12:15 pm
Triggers
If you look at some of the pictures of the Axial (Thayer) valve (there should be plenty on line) you will see that the valve core has two air channels that are slightly bent. When closed, the air goes through one channel directly to the gooseneck. When open, the air goes through one channel into the valve tubing and returns through the other channel into the gooseneck. Because there are no constrictions and the bends are gentle, the Axial has a lot less resistance than a rotor. In fact, it's very similar to a trombone with no valve. Some people find this TOO open; they like the little bit of resistance a properly designed rotor valve gives.
Some other valves have THREE channels. One is connected for the straight through, while the other two are engaged when the valve is in the F position. Naturally, building a core with three holes takes more room than one with only two, so many of the 3 channel valves are a bit larger than a true rotor.
Hope this helps.
Some other valves have THREE channels. One is connected for the straight through, while the other two are engaged when the valve is in the F position. Naturally, building a core with three holes takes more room than one with only two, so many of the 3 channel valves are a bit larger than a true rotor.
Hope this helps.
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ttf_BGuttman
- Posts: 0
- Joined: Sat Mar 31, 2018 12:15 pm
Triggers
If you look at some of the pictures of the Axial (Thayer) valve (there should be plenty on line) you will see that the valve core has two air channels that are slightly bent. When closed, the air goes through one channel directly to the gooseneck. When open, the air goes through one channel into the valve tubing and returns through the other channel into the gooseneck. Because there are no constrictions and the bends are gentle, the Axial has a lot less resistance than a rotor. In fact, it's very similar to a trombone with no valve. Some people find this TOO open; they like the little bit of resistance a properly designed rotor valve gives.
Some other valves have THREE channels. One is connected for the straight through, while the other two are engaged when the valve is in the F position. Naturally, building a core with three holes takes more room than one with only two, so many of the 3 channel valves are a bit larger than a true rotor.
Hope this helps.
Some other valves have THREE channels. One is connected for the straight through, while the other two are engaged when the valve is in the F position. Naturally, building a core with three holes takes more room than one with only two, so many of the 3 channel valves are a bit larger than a true rotor.
Hope this helps.