IDA-71 Homebuild

[Marre]

To be able to use the 2L bottle on the left side I needed to drill a bigger hole in the side to fit it in the case. Then it struck me, I must have a pressure gauge on the bottle and I only had one the came originaly with hose, so I found an adapter with bsp 1/4 male to something smaller then female 7/16. Then I drilled it out and made 7/16 threads so I could use a standard gauge.
For filling, im using a Female DIN witch i use on the "original" HP port and remove it when done.

By now I just had to figure out a good way to use the original DSV, so simpel solution was to use a mouthpiece from a 2-stage and use garn to secure it and it been working as a dream, after some adjustments.

I also added 4kg weight on the cover to compensate for the lifting caused by the CL. This will be made differently later tho.

As you have seen now, I have 2options of bottle use. Here you can see when using only 2L and the org. O2 bottle with DIN-valve, filled with air for dry suit and bailout(IF shallow).

What's the future? Well I suppose someone here on the forum has some suggestions but beside from that I want to nickel plate all the parts, paint bottles with correct colour code and some fine tuning to get it fully adopted to my needs.

Specially thanks to @Snusmumrik who gave a lot of useful information and good man to exchange ideas with.

 

[CHdivers]

Hello Marre,

really cool ! I have the same project going on.

A friend told me that, 2,5 liter , diameter 114 mm bottles are optimal, even hard to find though.

 

[Marre]

Hello Marre,

really cool ! I have the same project going on.

A friend told me that, 2,5 liter , diameter 114 mm bottles are optimal, even hard to find though.

I`ve only heard about 2L but I saw on mine that I could mount thick 3 or 3.5L bottles, if turning the scrubber 90degrees. That means major changes in the CL and the structure with the valve ending just underneath.

Whats the major depth your planing to use it on?

 

[Marre]

Hello again,
I have started a new conversion of my ida71. I'm making it to a mccr. So this is ida71 v 2.0.

My idea is to keep it tough for tough conditions and some joy of making it.
So i began to think and first was the o2 injection. Instead of injecting to the CL i thought the best must be in the scrubber. Thats why i have soldered the 90degree 9/16 adapter, but the functions of the scrubber is now compromised. I will now breath out into the breath in hole. This will make the canister colder, so i will add extra neoprem. I will connect a normal 2stage hose wich will then go to a manifold. This manifold will be one in, one out with a orifice and a bypass button. Im trying to get hold of some brass so i can manufacture the manifold, i also woundering how to adapt the bypass button into the manifold... But first i must finde a button.

 

[Marre]

While waiting for the brass i thought about the diluent. A simple way would be to just connect the diluent to the ADV and use the ADV as a Mav or breath out through the nose.

I already had the pipe so i cut it to the correct length and then i found an adapter, think it was npt to 3/8 female. Took it into the lathe and made it to fit my 8mm pipe. Then silver soldered it to the pipe. By now it dosent look so well so i thought i will go with the original theme. Abrakadabra it was now nickel plated and looks like original.
During the week i will have made the hose that will be a qc to the bottle side.

Ive attached a before and after of the quick connect at the bottle and the pipe already being plated.

 

[jale]

Hi
I don't get the idea of your injecting O2 in the scrubber...I don't see any advantage.