Errata

Equation reads ...
Rf = 1/5 rho V**2 S Cf
but should be ...
Rf = 1/2 rho V**2 S Cf

Two errors on page 13.
1)The W(Total) figure is added up wrong. Should be 4313 pounds not the 4317
pounds amount shown.
2) The x(CG fuel) amount is wrong. It is listed as 93 ft in Table 1-2, but
is transferred as 100 ft in the X(CG body) totals.

In the formula for X(cg body), I think the substituted value for X(cg fuel) is wrong
(should be 93ft, not 100ft). Am i mistaken?

Xcg body = .....(100ft)(210lb)}/4317lb -> ....(93ft)(210lb)}/4317lb

In the equation
C = AB sin theta
C is not a vector, so it shouldn't be printed as bold letter

vector F should be normal to the perpendicular distance d.

The equation in form:
T - R = ma
should be modified by:
T + R = ma
At the top of this page we have: R = -Cv. Substitiuting that we get:
T - R = T - (-Cv)= T + Cv
which means that total resistance force R has the same direction as propeller thrust
T. The resulting equation
T + Cv = ma
means perpetuum mobile - the dream of all magicians.

there are two equations that "define the wind direction as measured by the angle
<gamma>", one for the x-component, and one for the z-component. In the middle of
the second (z) equation there is a "cos <gamma>" when it should be "sin <gamma>".
The error appears to be due to copying the equation above it (x) and changing the
sin in one place (at the right end of the equation), but missing the other change
(in the middle).

defining C.d as independent of mass(or volume) results in
a ridiculous equation. Should be able to define C.d=0 for F.d=0
This is explained later in book(p.111).

It is printed
Fwx = Fw*cos(r) = - (CwVw)cos(r)
Fwz = Fw*cos(r) = - (CwVw)sin(r)

But Second Equation should be
Fwz = Fw*sin(r) = - (CwVw)sin(r)

In the equation for calculating displacement in the z direction, the term in the
exponent should be (-Cd/m)*t instead of (-Cd*m)*t

The first equation is incorrect, it should read that the
sum of the forces is Fp - Ff1-Ff2.

0.008 should be 0.0008

This figure is drawn incorrectly. The line of action n is not perpendicular to line
t. It should be, since this moves ball 2's center so its j-axis seperation from ball
1's center is r. That's what's required by the equation for the normal vector n on
the next page:

n = (sqrt((2r)^2 - r^2)i - rj)/|n|

Dividing by |n| does not make much sense since n is by definition a unit vector and
so |n| equals 1. Instead divide by 2r here.

Same problem as on page 92. Dividing by |n| does not make much sense since n is by
definition a unit vector and so |n| equals 1. Instead divide by r_1 + r_2 here.

The v1n- and v2n- are vectors. They are incorrectly presented as scalars.

the tangential friction force is only equal to the
normal force times the coefficient of static friction
immediately before slippage occurs.

I_cg should be I_1 and I_2 for omega_1+ and omega_2+

1st equation;
Equation reads ...
J= -V_r(e+1)...
but should be ...
J= -(V_r dot_prod N)(e+1)...

(V_r and N are vectors)

the right hand side of the integral should be with respect to dw only instead of w*dt

Should not "b" and "h" be measured from the same baseline?

As it is shown now, h is measured from the top of the shaded area, and b is measured
from the bottom, leaving their relationship ambiguous.

"b" should be measured from the same hight as the x/y coordinate axes.

stalling at an air show is not an example of stalling as a result of
reduced density with altitude - confusing example?

shows C.l=0.75 at 8 degrees (not 0.92)

'Instructions.txt' is missing from the download files.

In the definition of the class Body3D, the line

TFace Face[MAX_NUM_VERTICES];

should be changed to

TFace Face[MAX_NUM_FACES];

"Multiple rotation matrices reflecting multiple sequential rotations can be combined into a single rotation matrix using usual matrix multiplication. If the rotation matrices are expressed in terms of fixed, global coordinates, then they are combined as follows:
Rc = R2 R1
Here Rc is the combined rotation matrix reflecting a rotation first by R1 and then by R2. If the rotation matrices are expressed in terms of rotating, body-fixed coordinates, then they are combined in the reverse order as follows:
Rc = R1 R2"

One of the references given in the General Physics and Dynamics section of the Bibliography is the book Advanced Engineering Dynamics by Jerry Ginsberg. I have the second edition of this book, which in Chapter 3 Relative Motion, Section 3.2.1 Body-Fixed Rotations, states that the rotation matrix for n body-fixed rotations is given by
[R] = [Rn] ... [R2] [R1]

Section 3.2.2 Space-Fixed Rotations states that for n space-fixed rotations the rotation matrix is given by
[R] = [R1] [R2] ... [Rn]

Note that Bourg has it reversed.