#### Radicaldude1234

##### Well-Known Member

Waking up today after the holiday food coma, I decided to get on with it and ran the study again. Was also wondering if I could get a sanity check before finally proceeding to designing the structure?

Methods used: 3 different approaches

1. Algebraic equations in Nelson's book

2. Matrix based on Nelson's book and MATLAB ODE

3. X-Plane Simulation (ABSOLUTELY NOT PRIMARY)

Without rehashing what's in the pictures, conclusions are:

- Overall generally stable

-Positive Static Stability

-Manageable Dynamic Stability

- Fairly stable for short period disturbances

-The oscillations are damped

- UNSTABLE for phugoid

-Slow phugoid, but increasing over time

-Fairly normal for light aircraft

-Large horz tail might be contributor

- Probable dutch roll tendencies

- Due to long vert tail moment and large area (spin recovery authority)

All this fairly verified in X-Plane.