On Tue, Sep 14, 2010 at 12:38 AM, David Leonard <wdleonard@gmail.com> wrote:
On Mon, Sep 13, 2010 at 4:36 PM, Tracy <tracy@rotaryaviation.com> wrote:
About the same for me. I have about 10 years on silicone heater hose. The truckers use this stuff for a million miles before changing.
Tracy
On Mon, Sep 13, 2010 at 4:40 PM, Charlie England <ceengland@bellsouth.net> wrote:
Yes, there is occasionally method to my madness.
I figured Ed had you beat, but I'm pretty sure there's someone else with even more hours, if not calendar time, on high quality automotive hoses.
Charlie
On 9/13/2010 2:33 PM, Ed Anderson wrote:
'Frad not Dave,
My SS radiator hoses (AN-16) have over 10 years on them - no replacement, no leaks (so far). However, were I to do it again, I would probably not go SS due to cost and weight - but reliability has been absolutely great.
Ed
Edward L. Anderson
Anderson Electronic Enterprises LLC
305 Reefton Road
Weddington, NC 28104
http://www.andersonee.com
http://www.eicommander.com
*From:* David Leonard <mailto:wdleonard@gmail.com>
*Sent:* Monday, September 13, 2010 3:19 PM
*To:* Rotary motors in aircraft <mailto:flyrotary@lancaironline.net>
*Subject:* [FlyRotary] Re: Scheduled hose replacement
On Mon, Sep 13, 2010 at 11:53 AM, Charlie England <ceengland@bellsouth.net <mailto:ceengland@bellsouth.net>> wrote:
On 9/13/2010 1:02 PM, David Leonard wrote:
*The radiator manufacturer will have a maximum number based
on how
stiff the flat sided tubes are. Too much pressure rounds those
tubes and then pulls them loose from the fins when pressure is
removed. Also the rounded tubes slow airflow through the
radiator. *
*Racing radiators tend to have higher pressure ratings than
auto
radiators. *
*Most racers run 16 to 22 pound caps. Higher pressure means
higher
boiling temp for the coolant. Also more stress on the
connections. With a 2" hose and 22 pounds you have just
about 70
pounds trying to pull the hose off of the fitting. With
silicone
hose and safety wired clamps it would not be a factor. That
does
not include Chinese replica clamps. Just real American made
name
brand clamps. You can also use real aircraft quality clamps
already drilled for safety wire. *
*Many modern cars use no pressure cap. Just a sealing
filler cap
on a make up bottle.*
*An air space above the coolant level provides a volume of
air to
compress to control the pressure. If the moron at the gas
station
fills that bottle all the way up while reading the message
on the
bottle not to fill above this line,*
*the end tank will blow off of the radiator just like on my
wife's
car. *
**
*The 22 pound cap is middle ground, a bit more insurance, not
likely to hurt the radiator. *
**
*I use 22 pounds. Distilled water with 10% glycol and either
Redline Water Wetter or 1/2 teaspoon full of dish washing
detergent. It is gentle on the hands. Never a problem since
1980.*
*Lynn E. Hanover*
Hey Lynn and the rest of you smart guys, What is your opinion
on scheduled hose replacement? My plane has been flying for 6
years now and I just finished the annual. I decided that 6
years was long enough on some of my radiator hose and decided
to replace it. In particular, I ordered up the AN-16 steel
braided hose (Earls Perform-o-flex) for my coolant out line
but I just couldn't bear the thought of cutting and fitting
that stuff and hoping I don't get leaks or damage the AN hose
fittings or cut my fingers to shreds. So I decided the
current hoses were good for another year. Maybe a
justification...
Opinions on scheduled replacement of SS hose?
-- David Leonard
Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net <http://n4vy.rotaryroster.net/>
http://RotaryRoster.net <http://rotaryroster.net/>
I would copy the guy with the most trouble free hours on his
coolant hoses. :-)
Charlie
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Nice Charlie,
For braided SS in aircraft use, that might be me.. Guess I just keep going until I land on another highway... ;-)
--
David Leonard
Turbo Rotary RV-6 N4VY
http://N4VY.RotaryRoster.net
http://RotaryRoster.net
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Yea, I know thay CAN last a long time, but I remember as a kid spending the day stuck out in the desert because the radiator hose went out on our 6 year-old caddie. I knew Ed, Tracy, and stan at least have more time than me, but not sure on hose type. But I am also very glad to hear that the consensus is that I dont need to change out the hoses for at least another year or two.
Thanks,
That's the big plus in using Wiggins style couplings with aluminum tube. It is very easy to change out the o-rings. However, I still have braided SS fuel hoses to worry about.
Mark S.
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