Gilles;
I will correct my original E-Mail to show 33" MP rather than the 34" MP
as shown.
For me its the "sweet spot" on the engine. It has less vibration, its much
smoother running at this RPM as opposed to lower RPM settings. The
difference in
the fuel burn at 5300 RPM as opposed to 5000 RPM is nil.
This engine has served me well, for better than 600 + hours.
Jim Brown
N398JB
Gilles Thesee wrote:
>
> Jim Brown a crit :
>
> >
> >Alen
> >
> >Allen in my normal cruise I run the 914 at 5300 RPM and 34" MP
> >
> Jim and all,
>
> Those numbers correspond to rather high settings. While the engine may
> run at 100 % continuous, what is the point for a cruise above 75 % ?
>
> Here are excerpts from the 914 operator's manual :
>
> /100 % power is 5500 RPM / 35"
> 75 % power is 5000 RPM / 31"
> 65 % power is 4800 RPM / 29"/
>
> /10.3.8) Engine shut-off
>
> Normally the cooling down of the engine during descending and taxiing
> will be sufficient to allow the engine to be shut off as soon as the
> aircraft is stopped.
>
> At increased operating temperatures continue to idle until temperature
> will drop to "normal operation level", see Chapter 10.1).
>
> Allow a cooling run of at least 1 min. as an engine shu-off at high
> temperature is especially harmful for the turbo charger. Carburizing oil
> might block the oil supply and firing in the muffler can occur.
> /
> FWIW,
> Regards,
>
> Gilles Thesee
> Grenoble, France/
> /
>
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