Configure pilot weight (parachute)

[bobibob]

Hello,

Is there an option to know and configure the pilot's weight ?

Thanks

[TheEagle]

In-sim, go to Menu -> Equipment -> Fuel and payload, in that dialog on the right side you should find a "Pilot" slider. Some aircraft don't have it - then there's usually no way to adjust the pilot's weight.

[erik]

The weight of the pilot for the parachutist model is defined in the <pointmass name="Falling"> section and then by the <weight> parameter.
Note: this is weight of the pilot including parachute gear.

Erik

[TheEagle]

Ah, I overlooked that the question is specifically about the Parachuter. @erik Maybe, you could add a section like this in the -set.xml file so that the weight can be adjusted in-sim ?

Code: Select all

   <payload>
      <weight n="0">
         <name type="string">Pilot</name>
         <weight-lb alias="/fdm/jsbsim/inertia/pointmass-weight-lbs[0]"/>
         <min-lb type="double">0.0</min-lb>
         <max-lb type="double">220.0</max-lb>
      </weight>
   </payload>


[erik]

Good idea. So far I've never done such a thing but it sounds useful.

Erik

[TheEagle]

Then, you should consider also adding this to your other aircraft !

[erik]

I agree.

But I now see it was already implemented for the Parachutist..

Erik

[bobibob]

Oh that's great in what file can we modify the weight of the parachutist ?

[erik]

It's in /flightgear-fgaddon/Aircraft/Parachutist/Parachutist.xml

Or:

In-sim, go to Menu -> Equipment -> Fuel and payload, in that dialog on the right side you should find a "Pilot" slider.

Erik

[bobibob]

Thanks for your answers. The only thing I found about weight is in parachutist-set.xml where there is 2 weights section for faling and gliding but it use a min and max weight.

"
<payload>
<weight>
<name type="string">Falling</name>
<weight-lb alias="/fdm/jsbsim/inertia/pointmass-weight-lbs[0]"/>
<arm-in alias="/fdm/jsbsim/inertia/pointmass-location-X-inches[0]"/>
<min-lb type="double">0.0</min-lb>
<max-lb type="double">182.0</max-lb>
</weight>
<weight>
<name type="string">Gliding</name>
<weight-lb alias="/fdm/jsbsim/inertia/pointmass-weight-lbs[1]"/>
<arm-in alias="/fdm/jsbsim/inertia/pointmass-location-X-inches[1]"/>
<min-lb type="double">0.0</min-lb>
<max-lb type="double">182.0</max-lb>
</weight>
</payload>
"

Is <max-lb> the weight of the parachutist and the equipment ?

[erik]

The min and max properties limit the range which users can select in the Fuel and payload dialog.

Erik

[bobibob]

Thanks

Why is the weight of the pilot can be changed between falling and gliding?

Does the fact to change weight make the parachutist fall differently (for exemple a parchutist with 200lb fall faster than a parachutist with 100lb) ?

[erik]

Why is the weight of the pilot can be changed between falling and gliding?

The weight of the skydiver is interpolated between the two locations when transitioning from skydiver to parachutist. All weight is at the first location in freefall and at the second location after the chute is deployed completely. So you will only have to set the first.

Does the fact to change weight make the parachutist fall differently (for exemple a parchutist with 200lb fall faster than a parachutist with 100lb) ?

Yes.

Erik

[S&J]

I bet Galileo is spinning in his grave.

[erik]

This isn't about a free-falling object but about a parachutist with it's parachute deployed.
A parachute can only generate so much lift so mass influences it's descending speed.

Erik