Metal Prop vs. Wood Prop

One simple improvement you can make is to clean the prop and give it
some polish. It really is the most critical aerofoil on your aircraft
and should be kept clean and smooth.

Stealth Pilot
++++++++++++++++++++++++++++++++++++++++++++++++

MIRROR FINISHED POLISHED PROPS

It is being rumored here in Kansas City, USA, that the local FAA
is taking a very dim view concerning polished props. Unless the
prop comes that way from the manufacturer.... it's considered a
modification requiring an STC - Supplemental Type Certificate.

Barnyard BOb -- what next?

"Barnyard BOb --" wrote in message
...
MIRROR FINISHED POLISHED PROPS

It is being rumored here in Kansas City, USA, that the local FAA
is taking a very dim view concerning polished props. Unless the
prop comes that way from the manufacturer.... it's considered a
modification requiring an STC - Supplemental Type Certificate.

Barnyard BOb -- what next?

Obviously, next you'll be require an A&P with IA to wash and wax your
airplaine.
And don't even think about cleaning the plexiglass!

Eric

On Sun, 21 Sep 2003 06:39:37 -0500, Barnyard BOb --
wrote:


One simple improvement you can make is to clean the prop and give it
some polish. It really is the most critical aerofoil on your aircraft
and should be kept clean and smooth.

Stealth Pilot
+++++++++++++++++++++++++++++++++++++++++++++++ +

MIRROR FINISHED POLISHED PROPS

It is being rumored here in Kansas City, USA, that the local FAA
is taking a very dim view concerning polished props. Unless the
prop comes that way from the manufacturer.... it's considered a
modification requiring an STC - Supplemental Type Certificate.

Barnyard BOb -- what next?

I was referring to wooden props in my comments, though your point is
interesting re the 2025 props. if the anodised phlogiston spars (used
on RV's) have half the fatigue life of an alodined spar why is it that
props with an anodised finish dont seem to suffer a reduced fatigue
life?
beats me
Stealth Pilot

If the anodised phlogiston spars (used
on RV's) have half the fatigue life of an alodined spar


My newsreader doesn't get all the messages, so I may have missed the
antecedent referenced -- but what's the source that the anodized spars
have half the fatigue life? and why? Is that true in general, or only
for these spars?

thanks

Ed Wischmeyer

Earlier, Ed Wischmeyer wrote:

what's the source that the anodized spars
have half the fatigue life? and why? Is
that true in general, or only for these
spars?

http://www.matronics.com/rv-list/hov...s/AlAnDef.html

Search this page on "Fatigue." It references a 1991 RVator article by Van:

http://www.matronics.com/rv-list/hov...s/AlAnDef.html

Thanks, and best regards to all

Bob K.
http://www.hpaircraft.com/hp-24

Bob Kuykendall wrote:

Earlier, Ed Wischmeyer wrote:

what's the source that the anodized spars
have half the fatigue life? and why? Is
that true in general, or only for these
spars?

http://www.matronics.com/rv-list/hov...s/AlAnDef.html

Thanks, Bob! Learned something new.

Ed Wischmeyer

Looking at the article, there is a sentence..."However, it also reduces the fatigue life by up to 50%." This is not the same as 1/2! It also doesn't attribute the numbers to Van. Read it carefully!

"Bob Kuykendall" wrote in message om...
Earlier, Ed Wischmeyer wrote:

what's the source that the anodized spars
have half the fatigue life? and why? Is
that true in general, or only for these
spars?

http://www.matronics.com/rv-list/hov...s/AlAnDef.html

Search this page on "Fatigue." It references a 1991 RVator article by Van:

http://www.matronics.com/rv-list/hov...s/AlAnDef.html

Thanks, and best regards to all

Bob K.
http://www.hpaircraft.com/hp-24

On Mon, 22 Sep 2003 06:46:10 -0700, Ed Wischmeyer
wrote:

If the anodised phlogiston spars (used
on RV's) have half the fatigue life of an alodined spar


My newsreader doesn't get all the messages, so I may have missed the
antecedent referenced -- but what's the source that the anodized spars
have half the fatigue life? and why? Is that true in general, or only
for these spars?

thanks

Ed Wischmeyer

Ed it is as the other guys have posted. I believe our CASA got the
fidgets with it as well but I forget the details.

btw I have retired from my high and lofty position :-)
I'm now just a regular weekend pilot and full time uni student (tisc,
at my age) for another 2 or so years.

accordingly ...no need to bow when we meet now. :-) :-)
Hope your work with the EAA continues to go well.
Stealth Pilot
Australia