> Lieber Graham,
>
> wie geht es Dir ? Ich hoffe Du kommst bald nach Wien - im Moment haben
wir
> keinen Schnee...fuer die naechsten 3-4 Wochen....so hurry.....
>
> I am currently doing taxi tests. More or less high speed (30 kts). All
seem to
> be OK but I still have a few excuses for not to fly...Beside I am still
on a
> diet to compensate for my heavy building...so no APFELSTRUDEL and no
> PALATCHINKEN!!
>
> After rolling about 40 minutes with 2000-3000 rpm I get quite high under
the
> cowling temperature of 50-60 C near the carburators and 60-70 C at the
> mechanical fuel pump. (I have installed temp sensors on the back of each
air
> filter and on the mechanical fuel pump) Outside temp was 23 C and oil 110
C and
> water 100 C (glycol with 40% water). My oil cooler is mounted just below
the
> spinner and my exhausts are wrapped with Thermo-Tec insulation wrap. At
this
> temperatures static rpm went down to 4800-4900rpm compared to
5000-5100rpm when
> engine is cold (17 tip of blade).
>
> I suppose that cooling will improve when flying but on the ground it is
not
> quite optimal.
> After 40 minutes ground tests I shut off the engine for half an
hour...Even
> after 30 minutes under the cowling temp is still more than 70 C. When
starting
> again under this conditions I got vapour locks - as expected - after 30
sec
> running and engine went very rough and stopped. However vapour locks
stops
> immediately with electrical fuel pump on.
>
> I think that the fresh air inlet/box would definitely be an excellent
> modification and I would like to know how far is it?
>
> I am also looking for a variable pitch prop, sooner or later. Any new
experience
> with the Arplast (vibration, motor etc.). Would you recommend the Arplast
or has
> EUROPA better experiences with any other propeller ?
>
>
> Thanks for your advise
>
> Klaus
For those interested in the Arplast propeller I suggest you speak to Graham
Singleton who has completed 35 hours - A reprot has been written and
submitted to the PFA. We hope to have approval for general Europa use soon.
Please note the UK price is now L1469 + VAT
Three blades / hub / electonic control / digital pitch read out.
We can also give a Part Exchange discount on standard WarpDrive propellers
in good condition about L300. Making the cost a miserly 1169 + VAT which
in the UK is only 17.5%. There is of course no VAT on non EU export sales.
Jerry Davis
|