Matthew Law wrote
> Sent: 27 July 2004 11:55
> To: FlightGear developers discussions
> Subject: Re: [Flightgear-devel] Tried the Spitfire
>
>
> Boris Koenig wrote:
>
> > wow, I am just about to notice how much work some people spend on
> > really resembling all the various aircraft subtleties properly ...
> > didn't know that so far, would definitely recommend to create some
> > kind of summary for each aircraft and place it as a
> textfile into each
> > aircraft's folder.
> >
> > Many such things aren't that obvious, and even if they are it's
> > interesting how these things are implemented or what workaround is
> > being used to resemble a certain functionality.
> >
> > On the other hand such a detailed description of the implementation
> > could also provide some insights for other user who want to create
> > their own aircraft, or simply extend pre-existing aircraft.
>
>
> Things like carb ice may be a hinderance to the casual user
> (having it
> disabled by default would probably be the way to go) but since there
> are so many aircraft and pilots lost to it, it's fairly
> important for me
> even in a sim. Does Nasal do timers? If so maybe something
> like this
> would work:
>
> while (engines_running)
> {
> If (engine rpm < 40% && OAT > 4 deg C && OAT < 15 deg C)
> {
> if (carb_heat_enabled == false)
> {
> lean_mixture_by_increment; // lean mixture by a
> small value
> from user selected value
> }
> else
> {
> enrich_mixture_by_increment; // richen mixture by a small
> value until equal to user selected value
> }
> }
> else
> {
> enrich_mixture_by_increment; // as above, but by a
> smaller amount,
> for higher power settings ?
> }
>
> sleep 20 secs;
> }
>
> Please excuse the pseudo code - I've never done any nasal at all. I
> can't remember what temperature range carb ice most commonly
> occurs at
> and I'm not sure that after partial icing, a higher power
> setting would
> clear the ice... probably not.
>
Yup, all do-able in nasal no probs. David Megginson recommends adjusting the
manifold pressure to simulate icing. That's probably more realistic.
Regards,
Vivian
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