Home -> Vans Air Force topic: Prop Extension

Author: "rolfrv" <rolf@...> Time: Mon Dec 13, 2004 2:40 pm PST Link



Hello Members,

My 2 1/4" Prop Extension from Vans does not fit. The Prop
Flange "nubs" are nominally 3/4"
and they measured about half a tenth under: average of the 4 came out
to 0.7496.
But the very nice looking, beautifully anodized Prop Extenuation has
holes that are too small.
They are difficult to measure accurately with only a set of calipers,
but as best as I can tell,
they are 2 1/2 thou too small. That seams like too much of an
interference fit.

What say you all?

Rolf (trying to hang prop; RV6 O360 A1D )

PS The archives have nearly nothing on this subject; just a question
of how to get a stuck extension off!

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Author: "Ross Hauck" <ross@...> Time: Mon Dec 13, 2004 4:51 pm PST Link



Aluminum has a higher coefficient of thermal expansion, which means that
if you heat the assembly, the holes will grow than the "nubs" Warm it
carefully with a propane torch, wear gloves, tap it with a
rubber/plastic hammer and catch it before it hits the floor.

Ross

________________________________

From: rolfrv [mailto:rolf@microsource-inc.com]
Sent: Monday, December 13, 2004 3:45 PM
To: vansairforce@yahoogroups.com
Subject: [VAF Mailing List] Prop Extension

Hello Members,

My 2 1/4" Prop Extension from Vans does not fit. The Prop
Flange "nubs" are nominally 3/4"
and they measured about half a tenth under: average of the 4 came out
to 0.7496.
But the very nice looking, beautifully anodized Prop Extenuation has
holes that are too small.
They are difficult to measure accurately with only a set of calipers,
but as best as I can tell,
they are 2 1/2 thou too small. That seams like too much of an
interference fit.

What say you all?

Rolf (trying to hang prop; RV6 O360 A1D )

PS The archives have nearly nothing on this subject; just a question
of how to get a stuck extension off!

[Non-text portions of this message have been removed]

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Author: "David Domeier" <davidd010@...> Time: Mon Dec 13, 2004 9:16 pm PST Link



> What say you all?
>
> Rolf (trying to hang prop; RV6 O360 A1D )

Rolf, they fit tight. Clean up the drive lugs, apply a little Boe Lube and gently
tap-tap-tap the extension with a soft hammer.

dd

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Author: "Cary Rhodes" <rhodeseng@...> Time: Tue Dec 14, 2004 5:17 am PST Link



I may be wrong here, but. I believe one of the bosses is slightly
larger diameter than the rest.

Check the Lycoming parts book.

cary rhodes

--- In vansairforce@yahoogroups.com, "rolfrv" <rolf@m...> wrote:

> Hello Members,
>
> My 2 1/4" Prop Extension from Vans does not fit. The Prop
> Flange "nubs" are nominally 3/4"
> and they measured about half a tenth under: average of the 4 came
out
> to 0.7496.
> But the very nice looking, beautifully anodized Prop Extenuation
has
> holes that are too small.
> They are difficult to measure accurately with only a set of
calipers,
> but as best as I can tell,
> they are 2 1/2 thou too small. That seams like too much of an
> interference fit.
>
> What say you all?
>
> Rolf (trying to hang prop; RV6 O360 A1D )
>
> PS The archives have nearly nothing on this subject; just a
question
> of how to get a stuck extension off!

------------------------ Yahoo! Groups Sponsor --------------------~-->
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Now with Pop-Up Blocker. Get it for free!
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Author: "Richard & Roberta Hegy" <rhegy@...> Time: Tue Dec 14, 2004 2:36 pm PST Link



For sure on a lycoming 0-360A1A. The larger one indexes the Hartzell (and maybe other) props.

Roberta
----- Original Message -----
From: Cary Rhodes
To: vansairforce@yahoogroups.com
Sent: Tuesday, December 14, 2004 7:10 AM
Subject: [VAF Mailing List] Re: Prop Extension

I may be wrong here, but. I believe one of the bosses is slightly
larger diameter than the rest.

Check the Lycoming parts book.

cary rhodes

--- In vansairforce@yahoogroups.com, "rolfrv" <rolf@m...> wrote:

> Hello Members,
>
> My 2 1/4" Prop Extension from Vans does not fit. The Prop
> Flange "nubs" are nominally 3/4"
> and they measured about half a tenth under: average of the 4 came
out
> to 0.7496.
> But the very nice looking, beautifully anodized Prop Extenuation
has
> holes that are too small.
> They are difficult to measure accurately with only a set of
calipers,
> but as best as I can tell,
> they are 2 1/2 thou too small. That seams like too much of an
> interference fit.
>
> What say you all?
>
> Rolf (trying to hang prop; RV6 O360 A1D )
>
> PS The archives have nearly nothing on this subject; just a
question
> of how to get a stuck extension off!

Online help on this group at:
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[Non-text portions of this message have been removed]

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