In doing the patent searches for my two toroidal whistles, we came across a number of familiar and some not so familiar whistle patents. The last two on this...
It appears that only the first reference of this series is working. To see the rest, click on it, then click on the forward reference to my toroidal whistle...
On the whistle base that I made I designed it such that there is no nut on top of the languid plate at all. When you do this the nut doesn't even come into...
It definitely does make a difference. It's all in the percentage of radiating mouth area that's taken up. In the case of those externally supported bells, this...
Do you want a whistle with big sound but which uses relatively little air or steam to achieve it? Sounds impossible? Not really. Although this design never...
I guess what I meant was as whistle builders should the external vs internal bell support be our first option?? Or are either OK if kept as small as possible?...
Neither design is inherently any better than the other, provided that the all important radiating area is not blocked or compromised. The radiating area is...
People who run sound reinforcement for large events well know the effects of the inverse square law and atmospheric absorption. In addition to losing 6 dB...
A better presure operating range, seconed is the Id diamenter of the chime and Id diamenter of the bowel. ... Sorry, haven't learned to type yet!! I meant...
Pic 00015 in the Photos section clearly shows how Lunkenheimer built whistles using an intregal valve. It would appear that the area of flow around the valve...
Measurements from my 6-inch diameter Lunkenheimer show that the actual area of a 1-1/2 inch pipe nipple is about the same as the net area of the valve seat....
Does this take the rather large valve stem into account? That area must be subtracted from the opening. Also, a large square bulge is shown on the valve stem...
I believe I've just answered my own question. Open the photo Half a whistle(2) in the Photos section. It leaves no doubt that there is definitely a loss of...
It is an interesting point that you have raised. It would be a useful exercise to compare the inlet areas to valve passage areas in a range of sizes of antique...
Those are very small numbers for presumably conventional bell type whistles of these diameters. I'm assuming these readings would only apply for the bell at a...
I'm supposing those readings should be in CFS rather than CFM, as they are similar to Kahlenberg's and in the ballpark with my findings if they are. ... useful...
Apparently then, both Lunkenheimer, Kahlenberg and myself are basically in agreement as to a loud whistle requiring a flow rate of approximately 100 CFM per...
I have one of my whistles apart for cleaning and to add some parts from a parts whistle. The question is what is the correct way to get the bell height...
... How did whistle makers scale slot dimensions in relation to other whistle dimensions? Using the Crosby measurements published in Horn and Whistle magazine...
... Robert Swanson advocated trying 0.35 x diameter (0.7 inches) for a whistle of that type at 150 psi, so you might go a bit less. In the end it usually comes...
Using a bell height of .35 times the diameter may have some advantages when it comes to overcoming an obstacle to performance such as a large lock nut on the...
You are making things much more complicated than they need be by getting into fluid dynamics. Things are much more simple than that when it comes to designing...
Thanks for the advice. Thankfully this is an early Crane (marked CC) It does not have a nut to get in the way like the later Crane 125. I will see what i can...
... of a given scale to operate at a given pressure. That question was not of designing a whistle but of determining if there is any pattern to what the old...
Using .35 x diameter for 150psi would put me close. I measured my 3.5 diameter and it is set at 1 inch and sounds good 125 -80psi. ( small tank) and my 2.5...
The little whistle in the file "carwhis.wav" produced an SPL of 108 dB at 100 ft (138 dB at 1 meter). This is a very respectable output for any whistle using...
I opened the photos on the exhaust and explosion whistles in the Files section. The Aermore exhaust whistles are all small scale tubes, very similar in scale...
Explosion whisltes due to their placement were designed for very high pressures. As explosion whistles were connected to the combustion chamber (usually thru...
That would explain their design. According to this, explosion whistles would have given a pulsed output rather than a smooth, continuous sound. Through a...
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