Talk:Dräger Ray

More information needed

 * About the Dräger Ray, we need:
 * How long does it last on a filling?
 * Maximum safe depth?
 * What does it look like with the grey woven cover removed and its casing open? What do its insides look like?
 * Link to its maker's web page describing it? I tried Google search for "Dräger Ray" site:https://www.draeger.com, to look for its maker's web page describing it, and it found only ten web pages, and 6 of them were in Turkish!, and none of the ten were of use.
 * Anthony Appleyard (talk) 16:45, 17 October 2018 (UTC)


 * How long it lasts on a filling depends on how it is used. I have done 2.5 hours on an 8 litre cylinder, but the standard configuration uses a 4 litre or 5 litre cylinder. Also depends on mixture used, which affects the flow rate setting required, depth changes, which increase gas usage by triggering the dump valve when ascending, and ADV when descending, and work rate, which will affect the scrubber duration - harder work -> more CO2 -> shorter scrubber life.
 * Maximum safe depth depends on MOD of the gas. If I remember correctly there are two or three options.
 * The grey woven textile is the structure, all that is inside are the counterlungs (over the shoulder) and BCD bladder. It is unusual in being a softpack - the lack of frame makes the heavier cylinder rather uncomfortable, so I added a plastic firefighting SCBA backplate I picked up at a junk shop (not shown). The images in the article show almost everything that can be shown, but I will have a look.
 * I will try to find my user manual. If I remember correctly is does not have much detail, but may have enough to back up my statements above or at least give something we can use in the article. Cheers, &middot; &middot; &middot; Peter (Southwood) (talk): 09:45, 18 October 2018 (UTC)
 * I will try to find my user manual. If I remember correctly is does not have much detail, but may have enough to back up my statements above or at least give something we can use in the article. Cheers, &middot; &middot; &middot; Peter (Southwood) (talk): 09:45, 18 October 2018 (UTC)


 * Thanks. But in "and ADV when descending", what does "ADV" mean? Anthony Appleyard (talk) 11:49, 18 October 2018 (UTC)
 * . Automatic Diluent Valve. It is basically a demand valve plumbed into the loop which adds gas if the loop volume gets too small and a negative pressure differential between loop and external surroundings occurs, typically by increased ambient pressure on descent, or exhaling through the nose in a half mask. It may also be activated to purge the loop by manually pressing on the diaphragm as with a DV purge button, generally to flush the loop with fresh gas.
 * The manual is not where it should be. It may have been removed from the bag by the last person who borrowed it. It is possible that I have a digital copy. I will look. &middot; &middot; &middot; Peter (Southwood) (talk): 12:54, 18 October 2018 (UTC)