Sea Hornet Air Commando Regulators

[Fibonacci]

No worries, happy to help keep these iconic Aussie regs in action.

I've bought a lot of o-rings from The O-Ring Store, good prices and while they have a few o-rings with minimum order quantities, most of the common sizes in AS568 -000 series do not.

https://www.theoringstore.com/store/index.php?main_page=index&cPath=367_23_22

https://www.theoringstore.com/store/index.php?main_page=index&cPath=367_16_15

https://www.theoringstore.com/store/index.php?main_page=index&cPath=367_29_28

Also highly recommended is their SuperLube PTFE grease

Super Lube® Grease is a patented synthetic NLGI grade 2 heavy-duty, multipurpose lubricant with PTFE. ​

Synthetic base fluids and the addition of PTFE micro powders combine to form a premium lubricant that provides longer life protection against friction, wear, rust and corrosion.​

Super Lube® is Food Grade, rated H-1 by the USDA and NSF for incidental food contact. ​

It is an excellent Dielectric and operates over a temperature range from -45° to 450° F. ​

Impervious to salt water.​

O-ring Lube - Grease, Oil, and Silicone Lubricants

Super Lube®, Slickoleum, and Dow Lubricant Products all Online. Lubrication of O-rings and Seals is extremely important for installation and operation of dynamic seals as well as proper seating of static seals. Get your lubrication product easy at The O-ring Store.

www.theoringstore.com

 

[Fibonacci]

Couple more Sea Hornet Command Air memorabilia items c1997
Nitrox second stage and the MK6/6S diaphragm first stages make their debut... these are now extremely rare in Australia.

 

[Fibonacci]

A few more Command Air and B Commander RAN R&D pics...
The B-Commander was the pinnacle of the Command Air design, only 1500 were produced for RAN Clearance Divers and are very rare these days. Note the change to a lightweight gas-flowed plastic poppet and revised Turbo boost collar.

The Command Air family of second stages were tested for 'real world' durability by repeatedly dropping a full CIG alloy tank onto them... without damage to the thick walled ABS housing and cover.

 

[Fibonacci]

Command Air ANSTI 50m Test results (on a MK6 first stage)
In the last couple of years of TD Preece there was a more compact Command Air III Pacific model that got to mock-up stage but was never produced.
Chief Engineer Peter Katz really must have thought a pure latex exhaust valve had significant performance characteristics over the usual silicone rubber as the iconic clear viewing window was not only retained but enlarged to a flip up panel with QD pin for the Pacific model!

 

[Fibonacci]

And finally introducing TD Preece's Chief Engineer Peter Katz, the remarkable innovator behind the Sea Hornet Command Air family of regulators.

 

[Pressurehead]

RAN Clearance Divers and are extremely rare these days

DM sent.

 

[Fibonacci]

Couple more original diagrams showing the original Command Air Turbo Boost features patented by TD Preece in 1995 under US 5,437,268 and in 1998 under US 5,735,269 now much copied.

 

[Fibonacci]

Featuring the high performance environmentally sealed Sea Hornet MK6S balanced diaphragm first stage (typically paired with the B Commander) sectioned to show layout. Note the conical HP seat, similar to Poseidon.

Local techs experienced in servicing them say they were generally a robust design, the HP seat in particular had a very long service life... only main issue was the very small diameter ports for the ambient pressure transfer membrane which made thorough rinsing difficult and the residual saltwater caused corrosion.

 

[JaSr]

I have a few Command Air regs that I would like to dispose of.
I am planning to relocate overseas and although I would love to keep these it is just not practical.
I also have some other gear to divest of.
If anyone is interested please let me know. I will post photos in a day or so.

 

[JaSr]

As stated a picture of one set of the Command Air regs

If any one is interested I also have an old unused Apollo BCD and a set of Dive Developments wings.