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List:       flightgear-flightmodel
Subject:    Re: [Flightgear-flightmodel] Jet or Propellers for YASim turbo-props?
From:       Lee Elliott <leee () spatial ! freeserve ! co ! uk>
Date:       2003-05-25 2:36:28
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On Sunday 25 May 2003 03:02, Arnt Karlsen wrote:
> On Sun, 25 May 2003 00:22:34 +0100,
> Lee Elliott <leee@spatial.freeserve.co.uk> wrote in message
>
> <200305250022.34119.leee@spatial.freeserve.co.uk>:
> > On Saturday 24 May 2003 22:19, Jim Wilson wrote:
> > > Lee Elliott <leee@spatial.freeserve.co.uk> said:
> > > > Any thoughts on this anyone, or suggestions for making either the
> > > > propeller or jet more closely resemble a turbo-prop?
> > >
> > > I'd start with the prop.  Take a look at some of the assumptions
> > > made in the readme and the code.  Play with the max engine rpm and
> > > horsepower values (the engine won't blow :-)).  Otherwise what may
> > > be required is a turbine counterpart to the piston engine
> > > calculation, and I don't think that exists yet.  When Andy checks in
> > > again he can probably give you a better idea.
> > >
> > > Best,
> > >
> > > Jim
> >
> > Thanks all.  I'm trying to do a Bristol Proteus 2, well ten of them
> > actually;) - 3200 h.p. with 16ft 6" dia props.
>
> ..a Princess?  ;-)
>
> > Looking at the size of the jet pipes, there may be a significant
> > thrust element there.
>
> ..early -50ies turboprops, say 3/4 prop thrust and 1/4 jet pipe trust,
> off my head.
>
> > I'll carry on having a play with it and see if Andy has any comments.
> >
> > LeeE

Yep - a Princess.  Michael S. is working on a uiuc fdm for it and I was 
thinking of trying a YASim one to compare it with.

LeeE


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