Re: [Flightgear-devel] ASI: YASim & Systems/pitot bug ?

[Andy R. <an...@pl...>]

Melchior FRANZ wrote:
> 1. YASim delivers a positive "/velocities/airspeed-kt" on backward
>    flight.

This strikes me as correct behavior.  If you stick a pitot tube
into an airstream backwards, you will get exactly the same
reading as forward (well, modulo viscosity and mach effects).  If
what you want are the actual airstream velocity with direction,
those are provided as a 3 element vector.

If the gauge in the actual aircraft is bidirectional, it's
probably because it's a special design and you'll need to model
that separately.

Andy