#### Longitudinal Aircraft Dynamics #9 – more about forces and momenta – preliminary validation and testing

06/04/2011

This tutorial finalizes the implementation of the forces and momenta acting on the plane. It also initiates some hand testing and validation of the overall dynamics of the plane. [sociallocker][/sociallocker]

#### Longitudinal Aircraft Dynamics #8 – worksheet implementation of the dynamics equations (c)

06/03/2011

This section continues the worksheet implementation of the dynamics formulas for aerodynamic forces and momenta. [sociallocker][/sociallocker]

#### Longitudinal Aircraft Dynamics #7 – worksheet implementation of the dynamics equations (b)

06/02/2011

This section continues the  worksheet implementation of the dynamics formulas. [sociallocker][/sociallocker]

#### Longitudinal Aircraft Dynamics #6 – worksheet implementation of the dynamics equations (a)

06/01/2011

In this section, the parameters cl, cd and cm are scaled back to the force of lift, drag and the pitching moment of the aircraft. After that, the numerical  modeling scheme is described together with the macros behind it. At the end, the formulas for the angles of attack of the wing and the horizontal stabilizer are introduced. [sociallocker][/sociallocker]

#### Moment of Force and Torque Calculation

05/31/2011

This is an addition to a previous post, introducing the reader to different ways of calculating the moment of a force and the torque of a couple. This information will be useful in aircraft dynamics models.

#### Longitudinal Aircraft Dynamics #5 – finishing the aircraft

05/29/2011

This section finalizes the aircraft (glider) by inserting the wing, the horizontal stabilizer and a center of gravity (CG) sprite in the layout. [sociallocker][/sociallocker]

#### Longitudinal Aircraft Dynamics #4 – virtual aircraft definition

05/27/2011

This section of the tutorial explains how to create the  2D aircraft components for the animated longitudinal stability model. The first part deals with extracting the x-y coordinates for the fuselage, canopy, vertical stabilizer and rudder. The second part handles the main wing airfoil and the horizontal stabilizer airfoil. All thses parts will be put together in the next section. [sociallocker][/sociallocker]

#### Longitudinal Aircraft Dynamics #3 – layout parameters and wireframe fuselage generation

05/26/2011

This section discusses the layout of the virtual plane and provides for the worksheet implementation of the plane dimensions as input parameters controlled by spin buttons and macros. In the final part a freeform is used to generate raw data for the fuselage. [sociallocker][/sociallocker]

#### Longitudinal Aircraft Dynamics #2 – 2D polynomial interpolation of parameters cl, cd and cm

05/24/2011

In the previous section, the main wing airfoil and the horizontal stabilizer airfoil were simulated using Xflr5. The three coefficients, lift, drag and moment were then interpolated on charts in Excel using 4th and 5th order polynomials. This section shows a few tricks about how to easily introduce those 60 equations as spreadsheet formulas in Excel ranges. It also presents a simple linear interpolation method across the Reynolds number range. We need to do this since we simulated…

#### Longitudinal Aircraft Dynamics #1 – using Xflr5 to model the main wing, the horizontal stabilizer and extracting the polynomial trendlines for cl, cd and cm

05/23/2011

This is a tutorial about using a free aerodynamic modeling package (Xflr5) to simulate two airfoils in 2D (the main wing and the horizontal stabilizer) for ten different Reynolds numbers, then using Excel to extract the approximate polynomial equations of those curves (cl, cd and cm) and based on them, simulate a 2D aircraft as an animated model. This section deals with the aero modeling and the 4th and 5th order polynomial extraction….