Archived from groups: alt.games.microsoft.flight-sim (
More info?)
"Lakeview Bill" <bdentonchi@hotmail.com> schrieb im Newsbeitrag
news:iG3Yd.11657$6w7.3189@newssvr31.news.prodigy.com...
> Perfect!
>
> Thanks much, Oskar...
>
>
> "Oskar Wagner" <rengaw@swissonline.ch> wrote in message
> news:d0qetq$h02$1@news.hispeed.ch...
>> "Lakeview Bill" <bdentonchi@hotmail.com> schrieb im Newsbeitrag
>> news:Rj1Yd.11628$FN6.2693@newssvr31.news.prodigy.com...
>> > Does anyone know the proper combinations of Manifold Pressure and RPM's
>> > for
>> > the Mooney Bravo during climb, cruise climb, cruise @ various power
>> > percentages, and descent?
>> >
>> > The MS documentation doesn't have any thing.
>> >
>> > TIA
>> >
>> Well, it has a bit, but admittently not exhaustive. The thing is there's
> not
>> even a common power setting table for all TIO-540 engines as they use
>> different ratings on different A/C. In the Mooney e.g. they use a T/O
> power
>> setting of 38" Hg whereas in the Piper Malibu the same engine develops a
> bit
>> more power at 42" Hg.
>> So as long as you can't get hold of an original Mooney Bravo manual take
> the
>> following figures:
>>
>> T/O 38" Hg 2575 RPM
>> Climb 35" Hg 2400 RPM, leaning to 1400 °F EGT and 400 CHT allowed
>>
>> Cruise between 28 and 34" at RPM's between 2200 and 2400. Mixture leaned.
>> Never exceed 1450 °F EGT and 420 °F Cylinder Head Temp.
>>
>> For descent initailly reduce to 25" and 2200 RPM and let it stabilize for
> at
>> least 1 minute. Inorder to not cool down too fast lean the mixture to
>> max.
>> 1350 °F EGT.
>> After one min. you may reduce to 20" and partial still leaning. Try to
>> avoid power settings below 20" to reduce excessive piston ring wear
> (ok,ok,
>> we're in a game......or sim, as you like.. ;-) )
>>
>> These values are derived from a Lycoming TIO 540 Manual however not
>> specially adapted for the Mooney Bravo but still valid as a general
>> guideline. As you might see it's quite tricky to do a reasonable descent
>> schedule without the help of speed brakes. In this exceptional case it is
>> recommended to use speed brakes in first priority to avoid excessive
> cooling
>> of the engine. Handling of turbocharged engines is a bit delicate.......
>> Hope this helps.
>> --
>> Oskar
>> (retired captain)
>> Remember, in the great scheme of things, we're all small potatoes...
>>
>>
>
Just a small addition to that. The somewhat altered configuration on the
Bravo allows for TIT (Turbine Inlet Temperature) up to 1750 °F and CHT of up
to 450 °F. However I must admit that I never tested these values whether
they are realistic on the MS2004 Bravo. But as I know the default A/C it
should be more or less ok. They are not as bad as their reputation is....
;-)
--
Oskar
(retired captain)
Remember, in the great scheme of things, we're all small potatoes...