User:Urwumpe

OrbiterWiki administrator since december 2005

Lord of the block list

A/S/L: 33/M/Wolfsburg, germany

Occupation: Full-time software developer for computer-aided engineering solutions.

Orbiter addon developer since summer 2003.

N-Mail: Urwumpe(ät)Yahoo(döt)com

We were, We are, and we will be.

Math formulas

Nodal regression

$P$	Orbit parameter, $p=a \cdot (1- \epsilon^2)$
$u$	corrected true anomaly, $u=\omega + \varphi$
$R_E$	mean planetary radius
$J_2$	non spherical gravity term
$i$	inclination
$\omega$	Argument of perigee
$\epsilon$	eccentricity

$\frac{d\Omega}{du} = -3\cdot J_{2}\cdot (\frac{R_E}{p})\cdot \sin^2{u} \cdot \cos {i} \cdot [ 1 + \epsilon \cdot \cos{u - \omega}]$

Current Orbiter projects

• Space Shuttle Ultra project
• Black Dart project (military VTOL spaceplane with FBW and TVC)
• Starstreak (suborbital spaceplane)
• Soyuz launcher meshes
• SRTM data-to-mesh converter
• Ares V and Earth 2018 project

Technical Drawing Gallery

Some technical drawings I made, nothing too fancy.

• 

  Alpha Rescue Capsule