Duckbill tuning?

[INFIDELxx]

I have a couple Silicone Duckbills. They are the untrimmed ones. I've read about Tuning but cant find the spec's. How exactly do you tune it? I noticed that the position of the DB in the can dictates how it opens as you blow. But do I want it to make that "FART"......... sound or a smooth swoosh?

Also are there any tricks for installing the hose over the horn and DB so it stay's put?

Thanks!

[luis]

You don’t tune the duckbill, you tune the regulator.

If you fine tune the regulator so the inhalation resistance is less than 1 inWC (inch of water column) then the duckbill needs to be long enough so the opening is always less than an inch from the center of the diaphragm.

If the duckbill is short and you have a finely tuned regulator, the regulator will free flow when you turn or go vertical and the exhaust is higher than the center of the diaphragm.

Most regulators are not fine tuned that precisely, so it not as critical if the duckbill is a bit short…it is only when you are pushing the limits on fine tuning.



The easiest way to slide the hose over the duckbill is to lubricate inside the hose. I use silicone spray lubricant for this.

[Nemrod]

I try, often without success, to set the center of the vee of the duckbill dead center on the diaphragm. I have been adhering the new silicone valves to the can with a dab of silicone.

I try to avoid spraying or lubing silicone parts with silicone because it sometimes will swell of deform.

Nem

[luis]

I try to avoid spraying or lubing silicone parts with silicone because it sometimes will swell of deform.

Nem

Yes, I keep on thinking about trying KY jelly to lubricate the exhaust hose on to the duckbill, for that reason, but I haven't tried it yet. Silicone spray has been OK so far.

[usddude]

I place the duckbill opening in the center of the can. Don't laugh. but I use a drop of dishwashing liquid to slide the exhaust hose right over the duckbill. For me this works very easily.

[seakrakken]

I used a little Talc

[INFIDELxx]

You don’t tune the duckbill, you tune the regulator.

If you fine tune the regulator so the inhalation resistance is less than 1 inWC (inch of water column) then the duckbill needs to be long enough so the opening is always less than an inch from the center of the diaphragm.

If the duckbill is short and you have a finely tuned regulator, the regulator will free flow when you turn or go vertical and the exhaust is higher than the center of the diaphragm.

Most regulators are not fine tuned that precisely, so it not as critical if the duckbill is a bit short…it is only when you are pushing the limits on fine tuning.



The easiest way to slide the hose over the duckbill is to lubricate inside the hose. I use silicone spray lubricant for this.

Wow! I didn't realize there was that much too it. I guess I have still much reading to do. Oh well at least I enjoy learning..

[NAFOD]

I place the duckbill opening in the center of the can. Don't laugh. but I use a drop of dishwashing liquid to slide the exhaust hose right over the duckbill. For me this works very easily.

Laugh at what? That's how I re-grip my golf clubs.

[Nemrod]

I think the soap is a good idea.

Nem

[INFIDELxx]

I think the soap is a good idea.

Nem

Could make for a cool bubble show!