New mooney driver needs Oxygen.

[kortopates]

I've been thinking while I'm swapping out my old 76cf steel tank, I'd replace it with a 115cf kevlar tank: 5 lbs lighter 50% more capacity and 5 year intervals on hydro tests = win, win, win. 

I got ahold of the "oxygen lady" at Aerox. She said since the aircraft originally came with 76cf tank I have to put the same size back in it - I could use kevlar but it has to be 76cf. Please excuse my ignorance in this subject but it seems like there should be an STC for this modification? Has anyone successfully up-sized their O2 tank or is the oxygen lady correct? 

You absolutely can put the 115 ft3 tank in. Your A&P or shop should have no problem figuring it out with your Models IPC to get the correct model tank. That will avoid otherwise unnecessary paper work.

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[M20F-1968]

Skeptical John:

Yes you can change the size of the O2 tank you have onboard.  I installed an Oxygen system from an Ovation (115 cubic Ft) into my F model, but then decided to downsize the tank to 50 cubic Ft due to weight savings.  I used a Cessna Oxygen system POH and used that data based on 1 50 c ft tank to write the new fill instructions and usage times.  This was previously FAA approved data.  The FAA just signed off my new POH.  I started with the Mooney Oxygen POH and entered the preapproved Cessna data where necessary. 

I do not have the O2 tanks, but I do have the scott O2 tank brackets for the 115 cubic ft tank should you need them

[M20F-1968]

Skeptical John:

Yes you can change the size of the O2 tank you have onboard.  I installed an Oxygen system from an Ovation (115 cubic Ft) into my F model, but then decided to downsize the tank to 50 cubic Ft due to weight savings.  I used a Cessna Oxygen system POH and used that data based on 1 50 c ft tank to write the new fill instructions and usage times.  This was previously FAA approved data.  The FAA just signed off my new POH.  I started with the Mooney Oxygen POH and entered the preapproved Cessna data where necessary. 

I do not have the O2 tanks, but I do have the scott O2 tank brackets for the 115 cubic ft tank should you need them

[M20F-1968]

Skeptical John:

Yes you can change the size of the O2 tank you have onboard.  I installed an Oxygen system from an Ovation (115 cubic Ft) into my F model, but then decided to downsize the tank to 50 cubic Ft due to weight savings.  I used a Cessna Oxygen system POH and used that data based on 1 50 c ft tank to write the new fill instructions and usage times.  This was previously FAA approved data.  The FAA just signed off my new POH.  I started with the Mooney Oxygen POH and entered the preapproved Cessna data where necessary. 

I do not have the O2 tanks, but I do have the scott O2 tank brackets for the 115 cubic ft tank should you need them

[M20F-1968]

Skeptical John:

Yes you can change the size of the O2 tank you have onboard.  I installed an Oxygen system from an Ovation (115 cubic Ft) into my F model, but then decided to downsize the tank to 50 cubic Ft due to weight savings.  I used a Cessna Oxygen system POH and used that data based on 1 50 c ft tank to write the new fill instructions and usage times.  This was previously FAA approved data.  The FAA just signed off my new POH.  I started with the Mooney Oxygen POH and entered the preapproved Cessna data where necessary. 

I do not have the O2 tanks, but I do have the scott O2 tank brackets for the 115 cubic ft tank should you need them

[SkepticalJohn]

Update:

I competed the modification and now have the 115ft Kevlar setup instead of my old 76ft steel.

Anyone else looking to do this conversion, Aerox has all of the hardware you'll need. You'll need a new regulator and a new tank. The regulator for the steel tank WILL NOT fit the Kevlar (two different types of threads). The setup will set you back in the neighborhood of $8500 ($2200 of which is the Kevlar tank, the remainder is the regulator).

If you are looking to do this for weight savings, I'm sure there are cheaper ways to save 5 lbs ($1700/lb is a bit silly IMHO). The extra O2 capacity is were your REAL gain is going to be. 4 people can breath on this system for a quite a while ~ 50% longer. My next modification is going to be Monroy extended range fuel tanks, I love this aircraft!

[Tony Armour]

For better than 50% more.....just get some pulse demand units. I preach on these all the time but they need to be on your list if you are into oxygen use. For $299 you can get the old style units on the close out page. I have had my first gen units for 11 years with no issues. They aren't "cheap" but it would make the smaller 76 system last as long, probably longer than a 115 system. 

Another huge benefit, using regular small cannulas. No mustache size goober looking oxy-saver cannulas !

 

http://www.mhoxygen.com/index.php/portable-pulse-demand

[M20F-1968]

For what it is worth, if anyone is interested in installing a 115 cubic ft. cylinder (composite) I have a set of O2 bottle clamps (for permanent install into the tail).  They are made by Scott.  Retail is about $200 apiece as I remember, but I am looking to move left over parts from the hangar.  e-mail:  john.breda@gmail.com  cell: (617) 877-0025

John Breda

[DrBill]

On 7/3/2016 at 8:00 PM, DonMuncy said:

Setting up a fill system is a bit of a pain, and if not done really well, can get really expensive. I doubt I will recover the costs, but the convenience is well worth it.

I paid 25 for my tank on Craigslist.   235 for transfill adaptor,  c$20 to refill big tank after 3 bottle refills. I figure i'm even after 6  bottle fills.

Bill

 

[DonMuncy]

On ‎7‎/‎4‎/‎2016 at 6:37 AM, peevee said:

26 minutes ago, DrBill said:

I paid 25 for my tank on Craigslist.   235 for transfill adaptor,  c$20 to refill big tank after 3 bottle refills. I figure i'm even after 6  bottle fills.

Bill

 

That's doing it really well.

 

[Brandontwalker]

For what it is worth, if anyone is interested in installing a 115 cubic ft. cylinder (composite) I have a set of O2 bottle clamps (for permanent install into the tail).  They are made by Scott.  Retail is about $200 apiece as I remember, but I am looking to move left over parts from the hangar.  e-mail:  john.breda@gmail.com  cell: (617) 877-0025
John Breda

What type of setup do you use to run the plumbing from the tail to the front?


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[DrBill]

Here is the detail of my o2 setup

http://www.creativecomputersolutions.com/M20E_O2_SETUP.html

Bill