July 02 Olli writes
: Now we are now in our summer and its +24 C; last night I flew
to Halli at 22:14 and the sun was still shining. These pictures were
taken on 28.5.02, the man in the pictures is Rauno Pylväläinen.
Collector ring ...
continues... (about the collector ring):Each cylinder has
it's own stack and the connector ring is also divided for each cylinder.
The material is very thin, 0,9 mm if I remember correctly, so it won't
cause too much strain on cylinders.
size of the pipe is a bit excessive but Rauno was trying to get the
looks of the Siemens Halske's collector ring.
This same material has held on very nicely on the Finnish Air Force
Vinka's: most of them have flown over 4000 hours within 20 years and
the original pipes still hold on.
Next winter we plan to get the wings and tail done and perhaps it will
fly next summer?!
Keep going as there are more pictures following ....
powers up! now read the comments
the First Start Olli writes 17th August 2003:
Dear Paul, It was really really great to
get the engine running!
We pre oiled as you said and on second 10 sec run the oil light went
out. So as the tank is close and the pipes are short, there we no problem
to get the juice flowing.
It is amazing how smooth it is. I have a Lyc 320 on my RV-6 and it shakes
and vibrates all over even though it is a smooth Lycoming.
Your engine does not generate any noticable vibrations on Tiira even
though it weights now only about 280 kg without the wings.
After a good warm up we took it to full throttle and at 3600 rpm it
pulls 144 kp! We are not sure, if we need wings at all to get it flying!?
have the tail on next week and I will send you some pictures.
Then we will be busy to build the wings (just to be on safe side for
the first flight...).....
2003 Olli Writes:
1424 is builder Rauno Pylväläinen interviewed by local newspaper.
There were 3 of them coming to hear Rotec's sound!
August 2003: Hello again!
One more check: is 3500 rpm good figure for the engine at 15C temp?
There is 200 rpm to go abd induction and exhaust seems to work ok at
that rpm. -And it runs so smooth!
August 2003 Olli Writes:
warmed the oil to 50 C ore when the meter starts to move (at about 50
C) before getting full power.
was just thinking thatis our exhaust limiting the power to 3500 rpm
or is the prop limiting it at 3500 rpm. If it is the prop, then it should
be just right for Tiira: once flying or taking of, there is still 200
rpm to go beforeredline and we get full power at takeoff. -Sure it should
not be needed as it probably takes of at 50% power!
Internal macinery was really neat as you can guess when seeing the outside
of the engine!
Have you measured a prop load power curve showg the hp at different
2003 Olli Writes:
think that once people see them they just have to get one! There has
been tens of people here coming just to see it when the word spreads
that there is a neat radial engine here!"
of a delighted owner as the R2800 proves once more to be beyond and
February 2004 Olli Writes:
is pictures of the right wing installation today and as you can see
in backround, also the second is on good shape.
It is as big as Cessna 180 so there is lots of wing. Weight was about
45 kg with fuel tank so it seems that we will meet also the weight target
comment: Looks absolutely fabulous...
on the thumbnail to view full size.
Feb 2004:... Tiira has now both wings on
2004 - about ready to fly ...
August 2004 Olli Writes:
Jim! Here is some pictures from the airfield today! There is only radio
installation and official flight permit holding - and sure it should
be a calm day or night for the first flight. It will likely take about
1-2 weeks to get the permit and weather ok!
there was a 10 kts wind and it did not flip it over yet so there is
a good chance to get Tiira airborne!
Rauno is the gentleman on the picture.
Best Regards, Olli.
Flight Pics >>
First Flight: Click
on the thumbnail to view full size...
Tiira flew today for the first time. It was a cool morning (+6C at 5
On first flight Rauno Pylväläinen was on the front seat and
pilot Jyrki Laukkanen on rear. We have a 2600 x 60 meters runway so
there was plenty of space.
was accelerated to 70 km/h and it climbs at 2 m/s and 3600 rpm on engine.
Maximum speed (indicated) was about 150 km/h and stall at about 60 km/h.
We had adjusted idle quite low and when testing low speed stall the
engine stopped at 500 meters height. It did not start first but when
choke was on it started and run ok. There seems to be no windmilling
with reduction gear!
second flight I was on the front seat and we had a nice flight.
Handling seems to be good it flies like it looks!
And the sound is also as it should!
Best Regards - Olli and Rauno
flight (air to air pics) and comments ...
Sept 2004: 3rd Flight of 43 minutes went fine and we got some air to
air photos from a C-150!
We will adjust stabilizer a bit more to get it stall.
Best Regards, Olli Puttonen
.. Its always great to see another craft in flight!
End of September
... its cold and winter is etting in so the next pics will be in Finlands