Cabin Ducting

[MV Aviation]

Hi,
does anybody have the different diameters of ducting in a mid'60s E model on hand? The IPC is not very helpful in this matter.

Thanks!
Marco

[Yetti]

@GeeBee  likes ducting

[GeeBee]

Not me! Try Gee-bee

[Guest]

6 hours ago, MV Aviation said:

Hi,
does anybody have the different diameters of ducting in a mid'60s E model on hand? The IPC is not very helpful in this matter.

Thanks!
Marco

All of this ducting is sized in 1/4” increments.  CAT is single wall black, SCAT is single wall orange, CEET is double wall black, SCEET is double wall orange.  Two vowels equals two plies.

Black is generally used in cold air application and orange in heated applications.

Measure in 1/4” the metal Bibb you’re working with to know the size.
 

Clarence

[RLCarter]

6 minutes ago, M20Doc said:

Two vowels equals two plies.

Great way to remember which is which…….. thanks

[Guest]

1 minute ago, RLCarter said:

Great way to remember which is which…….. thanks

We learned that in maintenance school way back when, it’s always stuck.

Clarence

[Immelman]

Looking at my Aircraft Spruce order history, the smaller ducts (to rear seat feet and windscreen defrost) were 1 1/4 inch diameter. I ordered 1 12-foot and 1 4-foot piece and had some left over.

I also ordered 3 feet each of 2-inch and 2 1/2 inch diameter. I probably only used one of these, sorry I can't remember which size. That was for the larger tube between the two foot well airboxes.

The large intake duct (part 24) was larger. Perhaps 3 inch, but I don't remember and cannot find that invoice. That one is very short.

 

 

Edited November 8, 2021 by Immelman