Nigel, 4400, which is about 77hp on the 'S' engine. Rgds.,Duncan.
----- Original Message -----
From: "nigel charles" <nwcmc@tiscali.co.uk>
Sent: Wednesday, July 16, 2008 10:23 PM
Subject: RE: Europa-List: Prop advice fixed pitch - Warpdrive or Arplast ?
>
> Hi Duncan
>
> Did you mean 4400rpm static or did you mean 5400rpm?
>
> Regards
>
> Nigel Charles
>
> -----Original Message-----
> From: owner-europa-list-server@matronics.com
> [mailto:owner-europa-list-server@matronics.com] On Behalf Of Duncan &
> Ami McFadyean
> Sent: 16 July 2008 22:02
> To: europa-list@matronics.com
> Subject: Re: Europa-List: Prop advice fixed pitch - Warpdrive or Arplast
> ?
>
> <ami@mcfadyean.freeserve.co.uk>
>
> Jean-Paul,
>
> Here are some figures that I measured earlier this year for a 912S
> Europa
> using a 1600mm (63") diameter 130mm chord Arplast Ecoprop in place of
> the
> 64" wide chord Warp Drive (which had been set to 20.5 degrees at the
> tip).
>
> The Ecoprop propeller came off a BanBi Club (which is the version with
> longer wings than the normal (UK) BanBi) and for which direct
> performance
> figures were available. So, to compare with the Club, the propeller was
> set
> up at the same pitch as used on the Club
>
> The BanBi performance figure is shown first, with the Europa figure
> following in brackets (...).
> Blade set at 20 degrees at the tip (no spinner on the Europa):
> Max static was 4400rpm for both aircraft.
> 128 knts tas at 75% (130knts tas)
> 149 knts tas flat out (154knts tas 5500rpm)
> 1250 FPM (1200)
> 17 lph at 75% (16)
>
> The results are the same within measurable error, except that the Europa
> was
> faster!
>
> The 20 degree pitch setting is OK for a 500m strip but for my short
> (<400m!)
> strip and
> fully loaded I needed to fine the prop to 18.25 degrees. Which then
> provided
> almost identical take-off performance to the Warp Drive that I had on
> previously, except that
> fuel burn was 5 to 7% less with the Eco and vibration was reduced.
>
> The Ecoprop does not "constant-speed" as well as the Warp Drive, so has
> a
> narrower operational speed range, meaning more compromise for climb
> against
> cruise performance.
>
> The Ecoprop 130mm chord possibly has a little too much blade area for
> the
> 912S and could be better suited to the 914. I have not tried the 110mm
> chord
> Ecoprop.
>
> If I had the choice of the Warp or the Eco I would probably go for the
> Eco. If I had a longer airfield I would definitely have the Eco.
>
> Hope this is of use to you.
>
> Duncan McF.
> ----- Original Message -----
> From: "jpg12305" <jpg.comm@laposte.net>
> To: <europa-list@matronics.com>
> Sent: Wednesday, July 16, 2008 6:47 PM
> Subject: Europa-List: Prop advice fixed pitch - Warpdrive or Arplast ?
>
>
>>
>> My current prop is the standard 3 blade Warpdrive, but unfortunately
>> shortened in its early life due to a ground encounter.
>> Diameter is reduced to about 58", which (I assume) reduces
> significantly
>> as well its efficiency.
>> In order to revert to proper performance I am considering the current
>> alternative (VP not being an option due to cost and weight) :
>> - purchase new blades from Warpdrive (cheap and straightforward)
>> - replace with an Arplast Ecoprop. From misc readings it looks better
>> designed than the Warpdrive, question being if the extra performance
>> worths the extra cost.
>>
>> Engine is a 912ULS.
>> Has anyone gone through such change ?
>>
>> Jean-Paul
>> Europa monowheel 332 - France
>>
>>
>>
>>
>> Read this topic online here:
>>
>> http://forums.matronics.com/viewtopic.php?p=193137#193137
>>
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