LCOE Very tricky to design for, perhaps the most
complex key variable of all.
Max Power An top deliverable, but no good at all if other critical
variables are neglected.
Max Stability Generally overlooked in favor of active autonomy
beyond current stateoftheart.
Safety Absolutely essential and well understood, but with complex
economic dimensions.
KIS (Low Complexity) Early favored and possibly unbeatable, but
requires great faith and focused discipline.
Operations Many ideas are doomed by gaps in operational
practicality (like jumbo kiteplane VTOL).
Capital Cost A high LCOE is acceptable in many cases if the "cost
of entry" is low enough, and payback is fast.
Maximized Space Land and airspace efficiency will determine
acceptability in key cases.
Robust Reliability Essential, but deeply interdependent with other
essential variables.
Insurability, Regulatory Compliance, Social Factors, etc..
Discuss:
AirborneWindEnergy/message/8292

Working. Sift papers. Invite references and sample uses:
AR = aspect
ratio
C_{D }=
aerodynamic drag coefficient
C_{L} =
aerodynamic lift coefficient
C_{M} =
aerodynamic moment coefficient
D or F_{D} =
aerodynamic drag force
[N]
E = Emodulus [N/m2]
f = frequency [1/s]
F_{a} =
resultant aerodynamic force vector [N]
g =
gravitational acceleration vector [m/s2]
h = altitude [m]
I = inertial
moment [kg m2]
[[Indicated multiplication, as multiplication dot will be reserved for dot
product of vectors]]
l = length [m]
L or F_{L} =
aerodynamic lift force
[N]
M_{a} =
aerodynamic moment vector [Nm]
m = mass [kg]
n = normal vector
p = pressure [N/m2]
P = power [W]
r = radius [m]
r = position
vector [m]
S or A =
surface area [m2]
t = time [s]
T or F_{t }= tether force [N] [[ t here in subscript
is for "tether"]]
tension

Line Encyclopedia 
u = control vector
v = velocity [m/s]
v_{a} = apparent wind velocity = (v_{w} −
v_{k}) [m/s]
wiki/Apparent_wind
[[ k here in subscript is for kite]]
v_{k}
= velocity of kite
v_{w} = wind velocity [m/s] [[ w here in subscript is for
wind]]
v_{∞ }= free stream velocity [m/s]
x = state vector
Orbital_state_vectors
α = angle of attack [rad]
β = sideslip angle [rad]
η = efficiency
κ = camber
λ = crosswind factor
ρ = air density
[kg/m3]
ω = angular velocity
[[The SI unit
of angular velocity is radians
per second.]]
[
s^{−1} ]
=
angular acceleration
[
s^{−2} ]
[rad/s2]
[Author
is to define symbol without confusion with other parameters;
α is common, but do not confuse with angle of
attack.]
http://en.wikipedia.org/wiki/Rollpitchyaw
(x,y,z)=
(roll, pitch, yaw)=
(P,Q,R)
w =
{P, Q, R} = components of angular velocity
w_{x} =
P, w_{y} =
Q, w_{z} =
R.
Coordinates and rotation sets
P,Q,R =
roll, pitch, and yaw angular velocities [s^{−1}],
with the agreement that (x,y,z) = (roll axis, pitch axis, yaw axis)=(tail to
nose fuselage axis, center to right wing tip axis, center to down normal to roll
and pitch axes) under right hand directioning.
Note: Avoid being confused by geometric
lettering. Convention has it: P for the roll. Q for the pitch. R for
the yaw. Aeronautics: "xyz
convention" "time derivative of angles" Concern:
"gimbal lock" "body
frame"

Lecture 6 :
Aircraft orientation in 3 dimensions

http://www.euclideanspace.com/physics/kinematics/angularvelocity/pqrderivation.pdf
 PQR apparatus, rollpitchyaw apparatus, xyz apparatus,
Euler
angles ,
ΦΘΨ,
Φ roll,
Θ pitch, Ψ yaw. Some authors differ in
definitions.

http://www.kionix.com/sites/default/files/AN020%20Orientations%20and%20Rotations.pdf

http://en.wikipedia.org/wiki/Axes_conventions

Due to the special importance of international conventions in air vehicles,
several organizations have published standards
to be followed. For example, German DIN has published the DIN 9300
norm for aircraft^{[2]} (adopted
by ISO as ISO 1151–2:1985).
 North,
East, Down, referred as NED, used specially in aerospace
r,θ,φ = radial distance, polar angle, and
azimuthal angle [rad]
x,y,z = Cartesian
coordinates [m]
φ,θ,ψ = roll, pitch, yaw angles [rad]
Unless otherwise defined,
righthanded coordinate systems are a first choice in notes.
SI Units:
m :: meters, s :: seconds of time, rad :: radians, kg ::
kilogram (mass), m3 is the cube of meters,
Call for parameter notes was posted:
AirborneWindEnergy/message/8205 Dec.
14, 2012.

"crosswindspeedratio" (CSR)
comes closest to a consistent nomenclature...(ratio of crosswind airspeed to
true windspeed) ~ds, Dec. 14, 2012
[[This would be a scalar quantity, not a vector. ~JpF]]

v
