REFLECTOR: Las Vegas accident

[Kevin Baker]

Found this....
http://www.lycoming.textron.com/support/publications/service-bulletins/pdfs/SB369J.pdf

Not sure if it's helpful.. but is information.
Tragic accident.

Kevin


At 10:38 PM 8/27/2008, Brian Michalk wrote:
>Not much more information that the original NTSB report.
>
>What does it mean to engage the supercharger?
>
>A supercharger is a positive displacement compressor.
>Now, technically speaking a turbine (centrifugal) compressor powered via
>belt or other non-exhaust type source is considered a supercharger.
>However, most people understand that a "supercharger" is a positive
>displacement device.
>
>This means that if the power source is removed from a supercharger
>(broken belt, etc.), then it will be a restriction to airflow.
>
>So, for the first flights, was the supercharger bypassed?  It's amazing
>to me that the first five hours were uneventful, then this had to
>happen.  It's a tragic loss.
>
>A turbocharger, or centrifugal compressor would not present such a
>restriction.  I have done quite a bit of ground testing with the turbo
>installed as part of the induction path.  The engine runs quite well
>with a seized or non-powered turbo.
>
>David Ullman wrote:
> > An article that just appeared on the eb concerning the engine in the fatal
> > accident
> >
> > 
> http://www.aero-news.net/index.cfm?ContentBlockID=efbfd58b-4a6f-4095-b7ff-fc
> > 783fa77709
> >
> >
> > David G. Ullman PhD ME
> > Robust Decisions
> > ullman at robustdecisions.com
> > 541-754-3609
> >
> >
> >
> >
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