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drone stock on/off valve???

 
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chad_fross



Joined: 02 Feb 2007
Posts: 37
Location: Seoul Korea

PostPosted: Fri May 11, 2007 1:34 pm    Post subject: drone stock on/off valve??? Reply with quote

I have built a few chanters and drones............and am very interested in building a set similar to Olle's set...........the bellow's blown set with the deep bass drones. I noticed in a picture of Olle's pipes, there seemed to be some kind of drone shutt-off valve, similar to what is found in Uilleann pipes. Does anyone have any plans or any ideas how this would be made? If so I would love to know.......I would like to build such a feature into my common drone stock
Chad
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Idoheby



Joined: 05 Dec 2006
Posts: 33

PostPosted: Fri May 11, 2007 2:43 pm    Post subject: Reply with quote

try this pdf file (about 7,5 mb):
http://billhaneman.ie/HollowStock.pdf
this is about UP drone stock. very detailed.

in my sackpipa this mechanism is much more easy

I can send you a drowing of my stock (not detailed, just the principal)...
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Olle
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Joined: 21 Oct 2006
Posts: 435
Location: Uppsala, Sweden

PostPosted: Fri May 11, 2007 8:47 pm    Post subject: Reply with quote

Yes, that's how it works. The knob of the switch is attached to a rod which goes through the stock. At the other end, inside the bag, the rod ends with a disk, which covers the drone hole(s) from the inside when you pull the knobs.

A UP usually only has one such switch, i.e. one disk covers all drone holes at the same time. I have three switches, though, one for each drone:


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chad_fross



Joined: 02 Feb 2007
Posts: 37
Location: Seoul Korea

PostPosted: Fri May 11, 2007 10:04 pm    Post subject: Reply with quote

Idohoby, I can't seem to get past the first page on the pdf file. I'll have to try it again in a little while. And I would love if you could me the drawings, my address is chad_fross@yahoo.com. I have seen the "the one valve to rule them all" on the UP, and I would rather have three, like Olle has, so I can pick and choose which drone to stop. I know it's just as easy to tap the end of the drone to turn them off, but I like the valve idea more. Anyway, I've seen that the rubber stopper is on the end of a long bar and that the knob used as the "switch" just forces that rubber stopper up to close off the air passage to the reeds. However, my biggest question is:
In order for the "switch" to have contact with the rod/ bar in order to force the stopper up and down to cover the air access to the reeds, there must be a hole in the stock to allow the switch-rod connection. When the drone valves are in the open possition, won't this allow some air to escape the drone valve "switch seat/attachment area? Hope you can visualize what I am asking
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chad_fross



Joined: 02 Feb 2007
Posts: 37
Location: Seoul Korea

PostPosted: Fri May 11, 2007 10:08 pm    Post subject: Reply with quote

Olle, thanks for the picture of that drone common stock. And that is some fine looking wood, too.......what is it? Spalted Maple? It looks some form of spalted hardwood. I just ordered some Spalted Mubangu to work with. Anyway, back to the subject... I don't suppose you could offer a picture of the same stock, but with the stopper-end shown.......the end that plugs into the stock. And I am trying to figure out using that photo, how the "switches" are attached to the rod/lever that pulls the stopper up and down.
Chad
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Olle
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Joined: 21 Oct 2006
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Location: Uppsala, Sweden

PostPosted: Fri May 11, 2007 10:26 pm    Post subject: Reply with quote

It must be a tight fit to avoid leaks, but I don't think my valves leak any air. Maybe the rod is coated with something to a) avoid air leaks and b) see to it that the friction is right. You don't want the switch to be to hard to operate. On the other hand you don't want them too easy either, causing the air pressure to close an open valve.

I don't agree that it is just as easy to switch on/off at the drone ends. First, depending on the reed, some drones may simply not allow that. The drone on my mouth blown set cannot be stopped that way, for example. Second, you can only turn one drone on/off at the time, that way. Third, having switches allow you to turn the drones on while playing, without having to take the right hand off the chanter. The way my drone stock is positioned, however, turning the drones off while playing and without releasing the right hand is difficult.

The wood is mazur birch.

The rod is at a 90 degree angle. It bends just below the knob, to go through the stock in parallel to the drones.
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Yuri
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Joined: 16 Dec 2006
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PostPosted: Sat May 12, 2007 6:29 am    Post subject: Reply with quote

You can do it much simpler.(and with no possibility of leaks). that is the way old wooden taps in wooden Barrels are made. You have to make a tapered plug, to fit a tapered hole, this hole going through the stock. In the plug drill a hole across it. When the hole is turned perpendicular to the stock, no air. When along the stock's hole, hey presto!. Air. The trick is to make the taper absolutely identical on the plug and the bore for it.
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Olle
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Joined: 21 Oct 2006
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PostPosted: Sat May 12, 2007 9:56 am    Post subject: Reply with quote

That works too, though you must to it on each drone, not in the stock since the reeds are in the way for the peg. Alban made his valves that way up until 15 years ago or so. Jan Winter's (Liraman's) bellows blown bagpipe has such valves. The pegs are made from violin tuning pegs which looks very nice. However, Alban stopped making them because they were too likely to cause leaks. The "tunnel" which the rod runs through is much longer than the corresponding tunnel for a tuning peg. I guess that helps.

Works great for barrels, though. But there you have moist to help you with the sealing (the wood expands).
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Last edited by Olle on Sat May 12, 2007 10:04 am; edited 2 times in total
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Olle
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PostPosted: Sat May 12, 2007 10:00 am    Post subject: Reply with quote

I have another valve questions: Some Uilleann pipe chanters also have a stopping valve, operated by a key for the left hand index finger, so that you can silence the chanter while playing the regulators (or while tuning the drones) with your right hand off the chanter. Does anyone know how that valve works?
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Idoheby



Joined: 05 Dec 2006
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PostPosted: Mon May 14, 2007 7:15 am    Post subject: Reply with quote

http://www.uilleann.us/kevin/28.jpg

When you press the stop key, you pull small rod (that is inside the tube) that ends with a valve (here - with rubber ring).
This valve plugs the whole where air enters the chanter.

Once I saw a plan of this mechanism in the net, but now
I can not find it =(
there were at least two plans of two sistems...


maybe we should try this on multi-drone sackpipas?
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Idoheby



Joined: 05 Dec 2006
Posts: 33

PostPosted: Mon May 14, 2007 7:21 am    Post subject: Reply with quote

http://www.uilleann-pipes.de/images/cat/schaefer6-2.jpg

this is a good idea too...

one valve for each drone in the bottom of the drones.
and one valve for all stock....
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