Hi Peter,
I do not know the Rospellor prop, and can make no comparisons.
I have converted my XS to Kremin CS. This enables more efficient, smoother
performance in cruise, but does not seem to seriously improve take off
performance. You should note that the extra weight involves will seriously
detract from useful payload, possibly by as much as 20 pounds.
The consensus is that the conversion is worthwhile with the 80 horse 912 on
short fields. The 100 horse 912S makes the conversion les relevant,
particularly when using longer strips.
You will get plenty of conflicting advice on this I am sure, but my personal
opinion is that the fixed pitch did not come a poor second place. I would
not convert back now that I have spent my money (2300), but perhaps I could
have installed autopilot, or something else to more advantage with the
money.
Cheers! Bryan. G-BYSA XS Mono.
----- Original Message -----
From: "Peter Rees" <peter.rees01@tiscali.co.uk>
Sent: Friday, February 03, 2006 8:29 PM
Subject: Europa-List: Which Prop
> <peter.rees01@tiscali.co.uk>
>
> I know that this may descend into the mono vs tri-gear, 912s vs 914
> arguements but I'll ask the question anyway:
>
> G-MFHI is fitted with a 912 fitted with a coursly set (18 degrees)
> warpdrive - This returns a respectable 118-120kts and a rate of climb that
> doesn't cause concern over the trees at Rochester.
>
> The course setting of the prop limits the engine RPM to about 5100 so we
> can't legally use the weight upgrade.
>
> If we were to fit a VP/CS prop, we would see the requsite increase in RPM
> and could therefore use the 1370 limit.
>
> My question is - would a change to (what looks like) a prop with a more
> spohisticated blade design such as the Kremen give me any advantage in
> the
> cruise? If so, does anyone have any comments (positive or negative) which
> prop (Rospellor, Kremen etc) may be more suitable to fitting to a Classic
> 912 - which is about to have the engine removed for sprag clutch
> replacement
> :o(
>
> Peter
>
>
>
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