Re: Ranger engine breakin procedure

harrycheng_32043 · Post by **harrycheng_32043** » Wed Jan 26, 2005 8:19 am

'Hi Group
I would appreciate any info (factory or personal experience)on a good
procedure(air and or ground) for a fresh top ovhl on a 200HP engine.
Thanx in advance,
Harry'

Bob and Dot Haas · Post by **Bob and Dot Haas** » Wed Jan 26, 2005 7:46 pm

'Do not let it idle, run it up to "high normal" cylinder head temp then shut
it down. Let it cool and repeat this sequence several times then fly it
under load with an eye on the Cyl. head temp. do not let it overheat
continue until the exhaust smoke stops. The oil consumption will be very
high at first but with 25 hours the oil consumption will get down to 2
quarts an hour or less. Do not let the engine idle for any length of time.

The longer time periods you can run at normal loads the quicker the rings
will seat. Bob Haas
-----Original Message-----
From: harrycheng_32043 [mailto:harrycheng_32043@yahoo.com]
Sent: Wednesday, January 26, 2005 9:16 AM
To: fairchildclub@yahoogroups.com
Subject: [fairchildclub] Ranger engine breakin procedure

Hi Group
I would appreciate any info (factory or personal experience)on a good
procedure(air and or ground) for a fresh top ovhl on a 200HP engine.
Thanx in advance,
Harry

Yahoo! Groups Links'

mdaero1941@aol.com · Post by **mdaero1941@aol.com** » Wed Jan 26, 2005 8:06 pm

'Bob

When you say run it up to normal cyl. head temp., what RPM are you using and
for how long?

Mark Denest

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

rangerrobertmn · Post by **rangerrobertmn** » Wed Jan 26, 2005 9:41 pm

'Harry,
I am doing a 'top overhaul' on a 200hp. I am instructed to break in
with Mineral Oil (Phillips 20/50 -- NOT X/C). I am to pull the
plugs and crank the starter until I have oil pressure for three
minutes (not constantly turning the starter). I am to start it and
check for leaks. I am to let it cool down (for hours). I am then
to fly it and run it hard, a little over square, until the Cyl Head
Temp drops (probably within an hour). A common mistake is failure
to let it get REAL COOL after any running, before you run it again.

Also, I am NOT to run it until the Outside Air Temp exceeds fourty
degrees F.

Good Luck.

Bob Waldron
1939 Fairchild 24 K
Stillwater, MN

--- In fairchildclub@yahoogroups.com, "harrycheng_32043"
wrote:

>
> Hi Group
> I would appreciate any info (factory or personal experience)on a

good

> procedure(air and or ground) for a fresh top ovhl on a 200HP

engine.

> Thanx in advance,
> Harry

'

Bob and Dot Haas · Post by **Bob and Dot Haas** » Thu Jan 27, 2005 7:18 am

'Hey Mark, good to hear from you. I ran the engine up on the 24 and
the numbers I was looking for were 250'c cyl.head max at 1500 rpm. I let it
cool to touch and repeated the cycle several times, I think the long steady
flights, an hour to an hour and a half at 2250 rpm, really seated the rings.
The engine now has 88 hours on it and is using about a quart and a half an
hour, with no leaks. Bob

-----Original Message-----
From: mdaero1941@aol.com [mailto:mdaero1941@aol.com]
Sent: Wednesday, January 26, 2005 9:07 PM
To: fairchildclub@yahoogroups.com
Subject: Re: [fairchildclub] Ranger engine breakin procedure

Bob

When you say run it up to normal cyl. head temp., what RPM are you using and

for how long?

Mark Denest

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

Yahoo! Groups Links'

John Ellis · Post by **John Ellis** » Thu Jan 27, 2005 7:45 am

'Just wondering, what is the oil consumption on the Rangers that are
being flown. We use almost 1 quart of Phillips 25-60 per hour in the PT-19.
Considering going back to 60, but it is hard to find in less than
barrel quantity.

John'

Tom Mueller · Post by **Tom Mueller** » Thu Jan 27, 2005 10:57 am

'Harry,
Hope you get a lot of feedback on this matter. You've gone through
considerable expense,and deserve an engine that will last a good
long time. I feel most people are reluctant to push a new engine,and
that's understandable. Personally I think new rings are pretty much
set within the first fifteen minutes are so. I feel a high cylinder
pressure is to your advantage during this process. I'm not talking
high Rpm, just a gentle climb to altitude at a high cruise Rpm.
Watch you temps, everything is tight. Flatten out your climb if
temps become prohibitive. Twenty minutes should be enough. Descend
while carrying some power, "shock cooling" (descending at Idle) is
very hard on air cooled engines. it would be to your advantage to
preoil the engine before starting. also,(and I know it's expensive,)
but drain all the oil, clean all the screens after the first hour or
so.
Tom
Hanford,Ca'

mdaero1941@aol.com · Post by **mdaero1941@aol.com** » Thu Jan 27, 2005 8:26 pm

'Hey Bob, same here. What we have done in the past up here is this. First we
adjust fuel and oil pressure. We like to see about 60-65 lbs. on the oil. It
usually goes down about 5 lbs. after the first hour. After about 10 hours we
will go back and adjust it to 55 lbs. We will do a mag check at 1500 rpm also,
then shut down and cool off. Later on we'll go back and run it up more time to
check things out, then fly. We only run it up for about 10 to 15 minutes on the
ground. I'll do a shallow climb out to about 5,000 ft. (nice cool temp in
summer) then alternate the rpm from 2250 to 2300 for ten minutes, then down to
2100 for five minutes. Do this till the oil consumption stabilizes. We have been
getting less then a quart to a quart and a half an hour by this method. We
have been getting a few calls lately about rebuilding Rangers, Dad just finished
his 51st rebuild for a fellow in Florida, and now we have one that needs a
top overhaul that will go on a PT-26 in Illinois. Anyway, it's been a good
discussion - hope things are nice in FL., it's about 10 degrees here.

Mark Denest

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

Michael Denest · Post by **Michael Denest** » Fri Jan 28, 2005 5:55 am

'One thing Mark did not mention is the oil type. We
believe that 60 wt. (120 Grade) mineral is the best
break-in oil to use. Run it for at least 25 hours or
until the oil consumption goes down then drain it,
check the screens and switch to 50 or 60 wt. AD
(depending on climate). Works every time. 60 years
ago, the only oil available was mineral and these
engines were designed around that factor.

Mike Denest

--- mdaero1941@aol.com wrote:

> Hey Bob, same here. What we have done in the past up
> here is this. First we
> adjust fuel and oil pressure. We like to see about
> 60-65 lbs. on the oil. It
> usually goes down about 5 lbs. after the first hour.
> After about 10 hours we
> will go back and adjust it to 55 lbs. We will do a
> mag check at 1500 rpm also,
> then shut down and cool off. Later on we'll go back
> and run it up more time to
> check things out, then fly. We only run it up for
> about 10 to 15 minutes on the
> ground. I'll do a shallow climb out to about 5,000
> ft. (nice cool temp in
> summer) then alternate the rpm from 2250 to 2300 for
> ten minutes, then down to
> 2100 for five minutes. Do this till the oil
> consumption stabilizes. We have been
> getting less then a quart to a quart and a half an
> hour by this method. We
> have been getting a few calls lately about
> rebuilding Rangers, Dad just finished
> his 51st rebuild for a fellow in Florida, and now we
> have one that needs a
> top overhaul that will go on a PT-26 in Illinois.
> Anyway, it's been a good
> discussion - hope things are nice in FL., it's about
> 10 degrees here.
>
> Mark Denest
>
>
> [Non-text portions of this message have been
> removed]
>
>

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harry hayman · Post by **harry hayman** » Fri Jan 28, 2005 10:55 am

'To All The Fairchild Group .
What a reponse and thanx for all the info I asked for.
It is certainly a pleasure to be a part of such a
group.
The game plan is to plan a flight and fly the plan.
thanx again,
Harry
PS Question,is there anyone located in the
Jacksonville Fl. aera.I am at Haller Airpark,Green
Cove Spgs Fl about 30 mies south of Jax.

--- Bob and Dot Haas
wrote:

> Hey Mark, good to hear from you. I ran the engine
> up on the 24 and
> the numbers I was looking for were 250'c cyl.head
> max at 1500 rpm. I let it
> cool to touch and repeated the cycle several times,
> I think the long steady
> flights, an hour to an hour and a half at 2250 rpm,
> really seated the rings.
> The engine now has 88 hours on it and is using about
> a quart and a half an
> hour, with no leaks. Bob
>
> -----Original Message-----
> From: mdaero1941@aol.com [mailto:mdaero1941@aol.com]
>
> Sent: Wednesday, January 26, 2005 9:07 PM
> To: fairchildclub@yahoogroups.com
> Subject: Re: [fairchildclub] Ranger engine breakin
> procedure
>
>
> Bob
>
> When you say run it up to normal cyl. head temp.,
> what RPM are you using and
>
> for how long?
>
> Mark Denest
>
>
> [Non-text portions of this message have been
> removed]
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>

=====
Harry Hayman
Phone 904-284-4276
Fax 904-284-3869

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