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Post by nikeajax on Jan 17, 2019 10:04:25 GMT -8
BTW: I do have the hardware for the middle, but you'll have to play with that too Mr. Machinist...
JB
EDIT: Phil, check the posting before this one, as this is a new page...
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Post by vance on Jan 29, 2019 9:32:35 GMT -8
Phil, could you use some of that famous glue of yours to augment the one in the middle? It's urine (yours) if'n ya wants it! JB Thanks for the offer JB! I no longer need HP diaphragms. I got a bunch of parts from Rob at The Scuba Museum. This pile consisted of only parts I needed, and did not contain any more project regs. Whew! Now I am still short a couple of difficult parts to find for the R-3, but the C-3 is complete and working. I need the R-3 HP spring and actuating "pin", and the shaft for the demand lever/seat that is grooved for hairpin clips (I now have the clips!). For originality's sake, I could also use the can/leverplate/body screws and the long can screws, but don't need them to get the reg up and running. Here's the C-3:
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Post by vance on Jan 30, 2019 9:21:32 GMT -8
The early Dacor DH regs had no adjuster in the HP diaphragm hardware. I'm not sure if the interface between the pin and the newer style adjuster would work properly, but I can't think offhand of any reason why it wouldn't. If you put the newer style hardware on the older style diaphragm, the IP would be easily adjustable.
Also, I can't see any reason why one couldn't convert an R-3 to an R-4. It looks like a new style second stage/leverplate, etc. could be mounted on the R-3 to improve performance. I'll bet you can drill out the orifice hole in an R-3 body for the second stage. You'd need to drill a couple of small holes for the second stage screws in the body and through the top can. Everything seems to line up. You might need to replace the HP valve and nozzle, but the old one might work.
Why do this? Dunno. Maybe one has a box of parts to do it with? One likes the look of the R-3, but not its performance? One is a compulsive hotrodder?
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Post by technidiver on Jan 30, 2019 13:22:57 GMT -8
"Compulsive Hotrodder" hmmmm I know a guy that might fit that description, his name is Phil....
Just wondering, could somebody (if they had the time and tools) modify the guts of a Dacor to accept USD parts? Such as if you wanted to redesign the second stage to make it more like a DAAM.
TD
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Post by vance on Jan 30, 2019 15:07:05 GMT -8
Because the second stage fits into a hole about 3/8"-7/16" a hard seat for the second stage is a problem. Dacor's LP seat is different (and quite interesting). The second stage port would need to be bored out to accept a larger 2nd stage body and hard seat, or the second stage body would need to be re-designed around the small hole. I'm sure a clever person could figure one out, but in either case, it's a lot more than I want to do.
I suppose a Trieste type second stage/lever setup could be used if there's enough room to bore out the Dacor body. It would certainly be an improvement over the Dacor design.
Part of the problem with the Dacor 2nd is that the soft seat is held against the orifice by spring pressure on one of the levers, which has to press the soft seat into the orifice, rather than being around the LP carrier shaft pressing down. The spring pressure on the lever has to be pretty substantial. The lever system isn't very good, even though it's a compound system, and can't easily overcome the spring. That is part of the reason why Dacors breathe a bit harder.
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Post by vance on Aug 4, 2019 12:21:21 GMT -8
The question of whether Dacor DH regs used the same diaphragm throughout production came up a couple of days ago. I dug through my stuff and came up with an early set of diaphragms, and a newer exhaust from an R-4. As I thought, they aren't the same. Here's an R-2,3 diaphragm: and the R-4 diaphragm These are both exhaust side, but the intakes are the same only w/o the valve hole. The R-4 is thinner and more flexible, and has an "accordion" sorta fold in it.
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Post by SeaRat on Aug 4, 2019 16:16:44 GMT -8
Back on page 5, I posted this:
Not only did they change the rubber, but the Dacor engineers also decreased the size of the exhaust for the R-4. My calculations above show that adding three holes to the new exhaust diaphragms would give a greater overall area than the old ones, but the way that Dacor did the holes was both cheaper and had less surface area. The R-4 never did meet the NEDU criteria for approval.
John
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Post by vance on Aug 21, 2019 9:56:55 GMT -8
I had to make an HP pin for an R3 I have that's missing a few parts. I modded a Healthways pin from an HW single hoser which happen to be the same diameter. It had to be cut shorter at the square part and reshaped at the diaphragm contact and pin end. I copied one from an R2, which has the same part. I reproduced the little ground angle on my new part. The interface on the diaphragm side is flat. What is the angle for? The top of the pin is domed, so only the point contacts the diaphragm plate.
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Post by nikeajax on Aug 21, 2019 10:05:41 GMT -8
Phil, I always assumed it was from wear and tear from slopping around?!?!?!?
JB
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Post by vance on Aug 21, 2019 12:12:43 GMT -8
No, I don't think it could be wear. The pin is steel and the contact point on the diaphragm is brass. The brass part would be the part to wear. It has been deliberately ground into the part at a steeper angle than the dome's. To allow more air to pass?
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Post by crabbyjim on Aug 21, 2019 15:34:30 GMT -8
I had to make an HP pin for an R3 I have that's missing a few parts. I modded a Healthways pin from an HW single hoser which happen to be the same diameter. It had to be cut shorter at the square part and reshaped at the diaphragm contact and pin end. I copied one from an R2, which has the same part. I reproduced the little ground angle on my new part. The interface on the diaphragm side is flat. What is the angle for? The top of the pin is domed, so only the point contacts the diaphragm plate. What happened to “I think I’m gonna concentrate on one regulator”?
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Post by nikeajax on Aug 21, 2019 16:45:41 GMT -8
What happened to “I think I’m gonna concentrate on one regulator”? Sometimes we need to procrastinate over a few things to get our best work done: Latin: procrastinare, pro-, 'forward', with -crastinus, 'till next day' from "cras", 'tomorrow'. As a writer, painter and frustrated engineer, the wheels are always turning on six different tasks, figuring out the best way in which to do things. I know that Phil and I need to let ideas fester a while before they're done the right way... JB
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Post by vance on Aug 21, 2019 19:59:09 GMT -8
I had to make an HP pin for an R3 I have that's missing a few parts. I modded a Healthways pin from an HW single hoser which happen to be the same diameter. It had to be cut shorter at the square part and reshaped at the diaphragm contact and pin end. I copied one from an R2, which has the same part. I reproduced the little ground angle on my new part. The interface on the diaphragm side is flat. What is the angle for? The top of the pin is domed, so only the point contacts the diaphragm plate. What happened to “I think I’m gonna concentrate on one regulator”? I meant to dive with. And it's already fixed and ready to go to the pool to test. I wouldn't attempt diving the R2 or R3 in the ocean, in any case. You didn't think I could be done tinkering?
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Post by SeaRat on Aug 21, 2019 21:43:46 GMT -8
What happened to “I think I’m gonna concentrate on one regulator”? I meant to dive with. And it's already fixed and ready to go to the pool to test. I wouldn't attempt diving the R2 or R3 in the ocean, in any case. You didn't think I could be done tinkering? I have dived the R-3 in my river. It's not too bad, kinda like the second generation Healthways Scuba Delux regulator. Because there is no way to alter the interstage pressure, these R-3 Dacor Dial-A-Breath regulators do not function as well now as they did when new. The main spring, under constant tension for over 55+ years, looses some of its pazazz and so I suspect that the interstage pressure has decreased over the years. When I first test-breathed a Dacor R-3 in 1959, it breathed extremely easily, and its Venturi was enough with the Dial-A-Breath feature set on "Easy" that once inhalation was initiated, when I pulled my mouth away from the mouthpiece, flow continued. It's downfall from the U.S. Navy's tests was not inhalation, but rather exhalation effort. Thinking about this, maybe if I bought a brand new spring, I could again have that performance. John
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Post by vance on Aug 22, 2019 9:16:39 GMT -8
Shims under the spring might be the way. I wonder if an HP diaphragm adjuster from a later model will fit and work in these older ones? I don't have one to look at, so I can't say offhand.
BTW, making an adapter for the IP gauge would be pretty easy on these.
Does anyone have pictures of the newer HP diaphragm hardware?
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