Frans=2C
Your cooling problems at startup are not at all typical. As far as I know t
he engines are run in at the factory=2C and there is no recommended 'run-in
' period=2C like there used to be many years ago for cars.
You may well have had an airlock somewhere which cleared itself.
Karl
> Date: Wed=2C 29 Apr 2009 11:30:42 +0200
> From: frans@paardnatuurlijk.nl
> To: europa-list@matronics.com
> Subject: Re: Europa-List: First engine run=3B what is normal?
>
l>
>
> Hi Justin=2C
>
> > This one struck a chord with me.
> > Although I have a Rotax 912S and Classic cowl I had much the same
> > cooling problems to start with..
> >
> > I agree that it did take 15 hours or so before I acheived total temp
> > stability at the normal levels.
>
> I have now about 2 hours on the engine=2C and it is starting to cool down
> considerably. Can't tell of course whether this is due to some cooling
> modifications I made=2C or because the engine is now a little less tight.
>
> Also=2C the engine now runs much more smoothly=2C very noticable from the
> inside and the outside. I didn't change anything that could have caused
> this. My assumption is that the "tightness" was not evenly spread among
> the cylinders. It feels normal now=2C but the first hour or so you
> wouldn't believe how much it vibrated=2C shaked=2C etc. even on higher rp
m's.
>
> I'm happy now that the engine starts to behave more like I hopened for
> when I bought it.
>
> > During the flight testing period I experienced too much coolant cooling
> > and not enough oil cooling.
>
> Haven't got to this part yet. Managed to get the water boiling during
> idle=2C while the oil was still around 50 Celcius! It is now becoming
> better but the oil temperature is still way behind the water temperature.
>
> > I saw a Europa at a fly-in with some of the cooling vanes removed
> > between the water tubes in the radiator just in front of the oil cooler
.
>
> Good idea! I will keep this in mind in case I'm going to experience the
> same oil cooling problems.
>
> > In the heat of the mediterranen sun (say 36 degrees C) I have no
> > difficulty in taxiing for an unlimited period. I set the Airmaster to
> > "Manual" fully coarse and 1800 rpm and it keeps it steady well within
> > limits. Do remember to set the Airmaster back to "Auto" and "T/O" befor
e
> > taking off. I forgot this once and it wasn't a good experience.
>
> The good news with the Woodcomp with large twist is that it is more
> difficult to forget this. =3B-) It becomes quite noisy and rough if set t
o
> coarse while still on the ground. Presumably the inner part with very
> much twist gets a so large angle of attack that it stalls.
>
> Thanks for your comments!
>
> P.S. I think it would have been wise if either Rotax or Europa advises
> in their manuals about the cooling problems with a new engine. For a
> newbe like me it was a real brainbreaker to deal with an engine that
> overheats within 8 minutes before the oil even starts to warm up a bit...
>
> --
>
> Frans Veldman
>
>
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