Issues simulating vehicle with and without fuselage (3.47.0)

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Erik Fougner Arnesen

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Mar 4, 2026, 9:27:07 AM (4 days ago) Mar 4

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Hi, I been working on fixing the issues I have with my vehicle.

When I simulate with the full vehicle with the fuselage(including inside components), the results becomes very weird. The load seems to only look at the body and not take the wings into consideration, and looking at the longitudinal stability does not look when at all.

But when I simulate with only the control surfaces(wing, elevator, rudder) in a separate file, the load distribution looks good and is static stabile.

The only major difference between these two(as I can see), is that the full vehicle model has the fuselage as the parent component(all other are children of it).

Been looking at the tutorial videos on best practice, but cannot find the cause for the issue. Would appreciate greatly if someone could take a look at the full vehicle model and maybe point out what i have done incorrect.

With kind regards.

Vehicle_full_body_load_dist.png

Vehicle_full_body.png

Vehicle_full_body_long_static_stability.png

Vehicle_full_body_test_settings.png

Only_control_surfaces_test_settings.png

BMG109.vsp3

Only_control_surfaces_load dist.png

Only_control_surfaces_long_static_stability.png

Only_control_surfaces.png

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