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"Dave S" <Dastaten@earthlink.net> wrote in message
news:__T9g.4695$u4.1893@newsread1.news.pas.earthlink.net...
> Peter Dohm wrote:
>
> >
> > Just out of curiosity, what usefull information would this give you that
> > is not known from the tach?
> >
> > I realize that some drive systems allow the prop to freewheel if the
engine
> > stops; but no control is provided, so the benefit to be derived from the
> > added knowledge isn't obvious...
> >
> > Peter
>
> If your engine tach is inop because the electrical device that displays
> it is FUBAR, then you dont HAVE a tach per se to refer to.
>
> What would it tell you?
> One item would be wether or not you need to engage the starter in an
> air-restart situation. If the prop is windmilling, then you already have
> compression/airflow. Just need to add fuel and spark. Engaging the
> starter isn't likely to help. If its stopped, then engaging the starter
> would be a "really good idea (TM)"
>
> Just one of the quirks of pushers without a bubble canopy.. hard to tell
> if you are on fire.. hard to tell if you are streaming anything... and
> hard to tell if the prop is turning.
>
> Dave
>
You've really only served to emphasise the correctness of the point that
Highflyer made in two posts during the hour preceeding your post above.
However, I will play along for one more inning: Please elaborate on the chain
of events that would result in the loss of both engine power and engine
instruments. Please also justify the presumed deviation from the standard
practice of making the engine essentially self sustaining, and at least some
of the engine instruments self powered as well.
Sorry to play the prig,
Peter
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Re: monitoring pusher props
