Today's Message Index:
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1. 07:45 AM - Re: Engine boosting (rampil)
2. 09:52 AM - Re: Re: Engine boosting (William Daniell)
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| Subject: | Re: Engine boosting |
Rob is exactly correct. Compression always increases energy, in this
case heat. For a given compression ratio, there will always be the same
increase in heat energy and if starting from the same temperature,
always ending at the same higher temperature irrespective of fan blade design.
As for "Flygas", not in my airplane! There's something reassuring about
ground up system design and review of all affected parts in terms of
flight reliability.
Happy Holidays and Safe Flight!
--------
Ira N224XS
Read this topic online here:
http://forums.matronics.com/viewtopic.php?p=436250#436250
Message 2
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| Subject: | Re: Engine boosting |
Where I live in Colombia they developed a turbo for the stock 912 before
the 914 came out. It uses a Mitsubishi turbo with the standard carbs
albeit adjusted. I hear that you can get 39" but I only use 33" but given
that I fly out of SKGY MSL 8500 this gives 500' minute performance with two
adults aboard my ICPStol.
The system is pretty much what you would imagine with the four exhausts
feeding the turbo which has the standard vehicle blow off valve but with a
weaker spring than the vehicle one. I had manual adjustment with a vernier
for a while which also worked fine but added work. The cold side feeds an
airbox which feeds the carbs. I like this set up and I have flow nearly
500 hours on it without a problem except once when I fitted normal paper
carb bowl gaskets which let in air and high MP. Cork gaskets solved the
problem.
I had an engine tear down by a rotax certified mechanic at 500 hours and
all tolerances where within spec.
A lot of people use this set up here and I have never heard of any problems
except when the boost is set too high 40" +. In fact due to the complexity
of the 914 in many ways it seems a more reliable option.
Will
William Daniell
LONGPORT
+57 310 295 0744
On Thu, Dec 25, 2014 at 10:43 AM, rampil <ira.rampil@gmail.com> wrote:
>
> Rob is exactly correct. Compression always increases energy, in this
> case heat. For a given compression ratio, there will always be the same
> increase in heat energy and if starting from the same temperature,
> always ending at the same higher temperature irrespective of fan blade
> design.
>
> As for "Flygas", not in my airplane! There's something reassuring about
> ground up system design and review of all affected parts in terms of
> flight reliability.
>
> Happy Holidays and Safe Flight!
>
> --------
> Ira N224XS
>
>
> Read this topic online here:
>
> http://forums.matronics.com/viewtopic.php?p=436250#436250
>
>
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