CAT, SCAT, CEET, SCEET

[mlwynn]

Hi all,

I am working on my FWF installation. I have read Aircraft Spruce's summary of the differences between the abolve flexible ducting. What I can't figure out is, what should I use for my heat muff to cabin duct, blast tubes, etc. So, is it a choice of black over red? I assume that the CEET and SCEET, which are two ply thick, is overkill for the short RV runs. So it comes down to CAT vs SCAT.

Thoughts?

Regards,

Michael Wynn

[az_gila]

...to use forward of the firewall. This is pretty standard in certified planes.

The 500F rating vs. the 300F rating of CAT is the deciding factor.

Inside the cockpit area, then CAT is OK.

My RV vent kit came from Vans with black tubing still containing the label from the aviation department of JC Whitney....

[N941WR]

Originally Posted by az_gila

...Inside the cockpit area, then CAT is OK.

My RV vent kit came from Vans with black tubing still containing the label from the aviation department of JC Whitney....

I found some stuff at the local auto parts store that is "custom made" for Van's RV's, just read the label:

[jferraro17]

Bill-

LOL!

[osxuser]

Please don't use Cat for anything. After a few years moisture gets trapped between the tubing and the aluminum (Any aluminum it touches) which starts corrosion between that and the steel spring that is in the tubing. I wouldn't consider using anything that isn't Silicone embedded (the S is Scat).

[mlwynn]

Thanks for the insights

Michael Wynn
RV 8 FWF
San Ramon, CA

[az_gila]

Originally Posted by osxuser

Please don't use Cat for anything. After a few years moisture gets trapped between the tubing and the aluminum (Any aluminum it touches) which starts corrosion between that and the steel spring that is in the tubing. I wouldn't consider using anything that isn't Silicone embedded (the S is Scat).

...about your comments....

Assuming a low temp application, SCAT tubing also has exposed steel wires on it's interior surface, so why wouldn't it corrode in the circumstances you mention above? If anything, the silicone would hold moisture in more efficiently....

SCAT tubing showing exposed wire....



I believe the silicone embedding (the "S") is in the cloth, not the wire....

[carguy614]

Gil..
The wire used inside of the SCAT tube is copper coated, just like MIG welding wire, and resists corrosion. It is also a nicer product to use for the air vents. I have used the vinyl wire stuff on auto applications a few times and was amazed at how quickly it deteriorated. for the couple of extra bucks it costs to install SCAT, I think it is a good idea.

2 cents,
Chris

[az_gila]

Originally Posted by carguy614

Gil..
The wire used inside of the SCAT tube is copper coated, just like MIG welding wire, and resists corrosion. It is also a nicer product to use for the air vents. I have used the vinyl wire stuff on auto applications a few times and was amazed at how quickly it deteriorated. for the couple of extra bucks it costs to install SCAT, I think it is a good idea.

2 cents,
Chris

....SCAT to CAT like the original post said, or are we comparing SCAT to JC Whitney stuff? - which is a vastly different proposition....

What is the wire compostition/plating of real CAT hose, which oxuser did not like to use? Most likely, it is the same as the SCAT tubing, but I can't verify...

Perhaps oxuser really meant to say "don't use the automotive stuff", which has nothing to do with silicone content....

[carguy614]

That's probably right Gil. I may not be comparing apples to apples...
Regards,
Chris