On Mittwoch, 7. Juli 2004 21:32, Vivian Meazza wrote:
> It would be a shame if we can't model individual wires, then we could
> experience hook-skip whereby the hook can miss all the wires. A chum of
> mine went around 14 times trying to catch a wire in a Gannet aboard HMS
> Hermes. But I think the 'wire-surface' would do quite well.
Hmm, let me explain a bit.
I for myself will be happy to model the relality in detail.
That wire-surface has grown from an experience I have made during the past
half year when I wanted to push changes into JSBSim. For example, I often
proposed a mechanical system which much better models gears. This is not hard
to do from my point of view. But Jon always told me that this stuff is tooo
complicated and it is better to keep things as simple as possible.
So that 'wire surface' has really grown from a extrapolation of my couterpart
in JSBSim to the flightgear community ...
... I am happy with individual wires. It is a bit harder since we do only have
the position of the hook at discrete times. But I have also thought about
that:
Does the surface spaned from the hook in the prevous timestep and the hook in
this timestep intersect a wire?
If yes we can have a propability where we catch. And if so apply two forces
from the ends of the wire.
So the API between the FDM and Flightgear will look something like a function
taking a geometry of a rectangle and returning a bool which tells if a wire
is caught and where the two points are where the wire leaves the deck. And as
usual, how these two points move.
> It's very difficult to manoeuvre an aircraft onto a cat. You should
> consider modelling the self-aligning rollers and chocks which bodily shift
> the aircraft into the correct position. This need be no more than a area
> on the deck on which, if the main wheels are resting on it, a press of a
> key will automatically correctly position the aircraft.
So with a little jump to the right :)
Sounds sensible!
> A key press should signify when the pilot is ready for launch, then the cat
> should fire after a random interval after.
>
> The Jet Blast Deflectors (JBDs) could also be modelled.
Hehe :)
And a cat officer showing you where to taxi :)
And all these guys with yellow and green and whatever jackets :)
One by one. But yes ...
I think I will put several hundred wires onto KSFO's runway to do the first
tests :)
> I can provide more details if you are interested.
Yes, whatever you fell that could be useful.
References ...
Thanks in advance!
Greetings
Mathias
--
Mathias Fr�hlich, email: [EMAIL PROTECTED]
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