digitech
Posts: 1744
Joined: 8/23/2004
From: klimmenlimburg, NETHERLANDS
Status: offline
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[QUOTE]Originally posted by shockwave
Hello Sandor,
Nice video of the Raven. Again congratulations on putting everything together and getting her up in the air; I know that this is no easy task. What kind of flight times are you getting? Also have you done any acro experimentation?
As far as the 28/10 prop size goes this a target that we hope to achieve. I am always pushing to try to have scale props.  on my aircraft. I did have a friend in southern CA. that was successful in turning a 28/10 but this was on the bench and not in the airframe.
Again congrats on the Raven flights
Take care
David [/QUOTE]
thanks for the compliment
yes sometimes i wish for a simple gas engine
well for now we have a small problem
we are getting about 7 minutes out of 2 liters of fuel wich is to much , we suspect we have a fuel leak in the turbine or somewhere else , i have send the turbine to wren to be inspected
about the scale
yes i totaly agree it looks nicer with a true scale prop
i have for display shows mounted a 26x12 3blade fuchs
i wished we could use that
on the bench it runs everything
but as soon you go up in revs above 130000 watch the temp
it will rise and rise.
it is not because of the turbine being inside of the model,
actualy now it is very quiet and no difference in temperature
we get on the bench about 7500 rpm,s with 150000 on the turbine , believe me you need this speed to fly this big plane.
infact we flew her without the spinner and temperature was even higher! that with the spinner
not to mention the airspeed
i think honnestly as you can see on the video
that it "suddenly"goes very fast when in upper rpm,s
so i would suggest you run the turbine between 140000 and 150000 to get the best results.
but then you will see that the prop speed will stay low and resulting in high temperature
like i sayd our first flight resulted in a flame out,
it hardly came of the runway not picking up at all
at about 20 meters up , the temperature exeeded i think at 800c
we had a hard landing downwind resulting in a landing gear fracture , because of the raven it kept strait and did not fall out of the sky
this was with a 3 blade 22x11 fuchs
our next test we will try to use a 26 x 8 or 26x7
maybe we need to exchange the gearbox
i was thinking to get a different setting on that
so we can get the maximum out of it with a bigger prop
again like you said
it is a lot of work
but as soon you see her fly you forget immidiatly!
and just its a pleasure to listen
as for arobatics
we toulk it easy on the first run
we did some loops . wing overs , cuban,s ,tryed to hover
exept it keeps on climbing , so you have to play a lot with the stick
we want to try to get the turbine more agressive on the pickup
i am shure it can be done
again the raven is VERY easy to fly it has no intention to break to one side
is very easy to handle even in lower speeds
and because of the nice work of wren turbine picks up very fast on lower rpm,s
so you can bring her in just like the real thing
as you can hear on the video
that day was very windy still you can see how easy she come,s in
anyway keep us also posted about your testing
rember until now there are only 2 ravens on this planet that actualy fly with a turbine
it would be cool to see more of them
as you can also hear on the video everyone was just talking and talking and loved the smell of the kerosine 
reg Sandor
< Message edited by Sandor -- Jun 12 2003 10:18AM >
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Sandor Kruise
Dealers for:JetCat,Graupner,Futaba,Fei-Bao,Pro-Lynx,Airpower,Jets-munt,Xicoy,Jet-1A,Composite-ARF.
"Home of the Pro-Lynx Gears"
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Turbo Raven. - 
Nice video Sandor - 