[jhb_airlines] Re: Performance Query

  • From: "Mike Brook" <mike.brook@xxxxxxxxxxxxxx>
  • To: <jhb_airlines@xxxxxxxxxxxxx>
  • Date: Fri, 19 Aug 2005 12:54:08 +0100

Gerry -

My knowledge of RPN goes back to the dim and distant days of early HP
scientific calculators (late 1960's) so is VERY hazy <g>.  Maybe the
following site would help you in getting the logic sorted out:
http://www.calculator.org/rpn.html

MikeB

> -----Original Message-----
> From: jhb_airlines-bounce@xxxxxxxxxxxxx
> [mailto:jhb_airlines-bounce@xxxxxxxxxxxxx]On Behalf Of Gerry Winskill
> Sent: Thursday, August 18, 2005 6:10 PM
> To: jhb_airlines@xxxxxxxxxxxxx
> Subject: [jhb_airlines] Re: Performance Query
>
>
> Bones,
> It struck me I might be able to get around the comma problem,
> when using
> both the Vspeed gauge and your weight gauge.
> In the case of Vspeed, a version has to be created for each
> individual
> aircraft, by editing the source file and inserting the high and low
> takeoff weights to be covered, together with their Vnumbers
> at the flap
> settings permitted for takeoff config. No problem there.
> It considers actual Ramp Weight and signifies an over load, when
> present. That's the current problem with the Q400. The
> warning could be
> ignored but the calculated V numbers are daft, having been
> based on the
> comma'd weight. Now, if I include a factor of 1000 in the
> calculation,
> that might restore sanity.
>
> The existing line is
> (A:TOTAL WEIGHT,pound) (L:VSPEED_LOW_WEIGHT,number) - * +
>
> If I want to multiply the TOTAL WEIGHT by 1000, what's the syntax?
>
> Gerry Winskill
> gwinsk@xxxxxxx
>
>
> Gerry Winskill wrote:
>
> > I've spent the day, well most of it, modifying Rob
> Barendregt's Vspeed
> > gauge, to suit my normal CA aircraft. Once his instructions are
> > decyphered it's not too difficult.
> > The sticking point at the moment is that next in the queue
> is the Q400
> > and I haven't any real life data for it.
> > What I'm looking for is the Vnumber data for lowest and
> highest take
> > off weights, at the normal flap settings used. The
> Bombardier website
> > doesn't have it. Anyone able to suggest a site where I
> might find it?
> >
> > The gauge is useful in that it also provides the speed
> calls, filling
> > the empty second seat gap.
> >
> > Gerry Winskill
> > gwinsk@xxxxxxx
> >
> >
> >
> >
>
>



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