wrote in message
...
On Sat, 26 Jun 2004 10:53:43 -0500, Greg Copeland
wrote:

So, again, even
with 200hr/yr, we're looking at something about two years for a return on
our investment.

So, it doesn't look like quite the sweatheart deal after all. Now, if
there are some supporting numbers which indicate a return on TBO, then we
might have something to sing about.

Just some fun numbers for food for thought.

Cheers!

Ok, it may take two years to get your investment back in money saved
from fuel not burned.

And that's just fuel; it doesn't even take into account wear and tear due to
higher CHT temps.

Isn't that better than not getting any
realization of savings ever?

Let's see: About 40 cents a gallon time 15 gph = $6.00 and hour * 200 horus
a year = $1200 per year.

Figure in the amortized cost of a early TOH (two F33's I looked at had two
and three before they hit the 1700 TBO...one as early as 380 hours TTSN)
from running ROP (at least these two admitted such).


Also, Deakin doesn't say you must have the JPI instrument, there are
at least three other multicylinder EGT guages that show you what's
happening in each cylinder, including one that is NOT a digital LED
type. That one costs less than $1,000.

Quite. He merely says the JPI is _his_ favorite.