|
|
Post by SeaHunter on Apr 27, 2005 14:10:36 GMT -8
I'm curious about what it is in design/function that makes a balanced Royal perform better than the unbalanced brother - the D.A.?
What is this balancing and how does it work?
|
|
|
|
Post by Nemrodalt on Apr 27, 2005 23:53:19 GMT -8
Take a look a diagrams of a DA vs a Royal and you will see that the Royal first stage uses an additional spring in the first stage assembly and the design compensates for falling tank pressure to maintain a steady intermediate pressure. My limited experience with the Royal and the DA is that equally tuned the Royal will out perform a DA, however, I am sure there are those who dissagree. I have two nice Royals, a very nice DA and a neat Mistral, I will not give any of them up. The Royal uses essentially the same first stage design as the ubiquitous Conshelf single hose, a nice performer itself. I cannot answer your question, while I would as soon pull my teeth out as part with my DA when push comes to shove it is no Royal but still they are a very excellent double hose and a good startig point as well. James
|
|
|
|
Post by Vintage Bob on May 8, 2005 21:50:09 GMT -8
Essentially, due to the different design of the first stage nozzle and seat of the Royals, tank pressure doesn't act as a force on the opening and closing of the seat. Whereas the D/A has an up stream high pressure seat and tank pressure helps keep the seat closed on the nozzle. Consequently, the IP of the D/A which should be around 110 psi @ 2250-2400, will climb to 135-140, (at least that's what I have observed with my DA's), at around 500 psi. So, like the Mistral, in theory the DA becomes easier to breathe as the tank perssure drops. I have three D/A's and I was only able to fine tune one of them to breathe as easy as the Royals.
|
|
