'Hi John
Lets be clear I am no expert but I have been operating a 200hp ranger engined
f24 in the UK for the last 6 years.
I have now got my oil consumption under control and down to less than half a
litre and hour from over 2 gallons at high rpm.
When I bought the plane It used allot like yours and I lived with it for a
while. I checked the rpm( using a model aircraft tacho) and gauge rpm there was
a difference!!!!
I thought I was setting 2000 odd but the actual was much higher...........as
soon as I bought the rpm back to the book figure the consumption reduced
......................but it was still blowing it out the breather at anything
from 3 to 6 litres a hour ....................not good for touring.
This winter I have performed a proper top end overhaul and and changed the valve
guides as they were badly worn.............the piston rings and the usual
de- glazing of the cylinders and the differance is amazing..............I cant
remember when I last put oil in her.
When I first bought her she was meant to have had a top end overhaul but they
obviously had`nt done the valve guides ...as they were very worn.
The strange thing was the compressions were ok?
I am sure the guys will have a answer for you but this turned out to be
my particular problem others I am sure will have other solutions.
Best regards
James
________________________________
From: jwm1801
To:
fairchildclub@yahoogroups.com
Sent: Monday, 18 April, 2011 15:56:38
Subject: [fairchildclub] Re: Ranger Engine Question
Maybe I have been running the engine too fast. Not being too familiar with this
engine I always thought it was good to run a higher RPM during breakin. I have
be fluctuating my throttle from 2150-2300 in 10-15 minuet intervals. I have an
engine analyzer which give me reading on all 6 cylinders. All temps are close
in the 1200-1350 range. The engine breather extends from the bottom cowl 1".
Maybe this is not enough. Does this really create a suction if too short? The
inside of the stacks are black. I also have a pesco wet pump hooked up with an
air oil separator. No oil appears to be coming out of the overflow for the
separator. I have the oil return line for the vacuum system ported back to the
accessory case to the port to the right of the vacuum pump. Thoughts? Yes I
have a scavenge pump. Don't know how to check to make sure it is running but I
took the hose fitting off the line that comes from the pump to the oil cooler
and it was full of oil. Frustrating... JON
--- In
fairchildclub@yahoogroups.com, "Bob" wrote:
>
> Jon,
>
> You are looking at more than three GALLONS of oil per hour. This is seriously
>wrong. Three quarts per hour might be unseated rings, but I doubt that three
>GALLONS per hour could get past the rings.
>
> I suspect that you have the plumbing installed wrong. Any pictures? Mine is
>an earlier model with the oil cooler hanging out the bottom of the cowl, so
>seeing mine wouldn't help as much as seeing a later model. Where are you
>located?
>
> Are you possibly running the engine to fast? Have you got a non-standard
>propeller? Do you have a manifold pressure gauge?
>
> Hope you can get it sorted out soon.
>
> Bob Waldron
> 1939 Fairchild 24K
> Webster, MN
>
>
> --- In
fairchildclub@yahoogroups.com, "jwm1801" wrote:
> >
> > 3.5 years and 500 hours- my Fairchild 24R46 had its first flight this past
>weekend. What a thrill and a terrific flying airplane. The bad news is I used
>a tremendous amount of oil. Engine has a fresh overhaul as does all the
>accessories including the oil cooler. I thought it might just need to run to
>break in but I now think something else is going on. This morning I flew her
>for 45 minuets and used 2.5 gallons of oil. Oil is coming out of the breather
>line and all over the belly. Oil cooler is warm but breather line is warmer
>then the oil return line. Any on have any suggestions??? PLEASE HELP!! JON
> >
>
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'
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