Remi, I agree that it would be great to have definitive trials of the
whole range of props. Europa at one stage promised this but never came
up with the goods. I would be very surprised if the Sr 2000 is a 'bad
prop'. I first became interested in it when I saw Tom Justic's
914/SR2000 /XS take off together with th company 914/Airmaster/XS at
Benezov during the 2000 Prague Fly out. Tom's plane climbed at an angle
that looked to be 10 degrees steeper, whilst keeping up in a horizontal
sense. During the years I flew one I never had problems keeping up with
rivals. The tip angles were adjusted in both cases to give a max static
of 5650 rpm.
Regards, David
On 2016-07-30 11:51, Remi Guerner wrote:
>
> Hi David,
> I agree 100% with you about the effect of high twist blades on ground cooling
and the possible improvement of the cruise performances, but I am puzzled by
your figures.
> Your figures for the Woodcomp low twist prop suggest these blades are very far
---From being suitable for this engine (914) as they need to be set at an
incredibly
high angle to transmit the power. It is very likely that the blades are
fully stalled during the early take off phase, therefore reducing the take off
performance. It is even possible that they are partially stalled (at the tip)
at cruise.
> My point is: if you start from a very bad prop, almost any other prop you try
will show a significant performance improvement. It would be very interested
to find out how the performances of your Woodcomp high twist prop compare with
those of the Airmaster/Warp Drive.
> Remi
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=458908#458908 [1]
>
Links:
------
[1] http://forums.matronics.com/viewtopic.php?p=458908#458908
[2] http://www.matronics.com/Navigator?Europa-List
[3] http://forums.matronics.com
[4] http://wiki.matronics.com
[5] http://www.matronics.com/contribution
|