The Steigeisen was designed to meet the highest demands as a Discus Launch Glider. Excellent penetration characteristics when returning from a downwind run, superior launch heights and great handling in thermals are some of the characteristics that resulted from extensive testing of all the design aspects.
The Logo Team went beyond current thinking with its design targets. The result is an extremely strong, lightweight fuselage with a horizontal elliptical cross section. The mount point for the fin is molded as part of the fuselage ensuring perfect vertical alignment. The horizontal-tail is an all flying stabiliser. Fixing the horizontal-tail takes a matter of seconds and a micro ball bearing gives you precise and direct control inputs in conjunction with carbon pushrods sheathed in Teflon Tubing. No more temperature drift of your linkages and an absolute repeatability of decalage are the results.
A Look Under the Hood : Aerodynamic Design
The biggest increase in aerodynamic performance comes from the new airfoil. The newly developed wing sections get their performance by a balancing act between excellent launch height and penetration as well as an excellent rate of descent.
Good penetration characteristics have become more and more important as most F3K competitions take place downwind nowadays. To further improve these penetration characteristics at moderate airspeeds, the aspect ratio was increased slightly. As a result wing loading can be slightly higher to achieve a better lift/drag ratio. At low airspeeds the lower induced drag makes up for the higher wing load.
What else can be done to get better launch heights? Simple geometric considerations said that the launch peg needed to be as far backward as possible. To fully understand this we analyzed the launch phase with high speed cameras as well as a computer simulation. Both showed that our simple considerations had been correct. To translate this launch peg lag into reality the wing geometry is slightly swept back. This results in nice handling characteristics as a side eff ect. Thermaling with the Steigeisen is a joy. Little aileron is needed to support turning in flight.
The elevator was designed as an all flying stabilizer. The main characteristics are advantages in drag when deflecting the elevator, as well as in trimming the glider. In addition to this the flight characteristics are very obedient. When you look at the position of the elevator compared to a regular F3K setup, you will find that its position is more towards the tail, providing improved dampening of the pitch axis. As a result we were able to reduce the surface area of the elevator.
Team SUSA Comments:
The Steigeisen is truly a collection of advances, more than we can list here.. We are very proud to add this model to our lineup of competition class aircraft. We will be stocking the “Disser + D-Box” version, which features a carbon D-box with Disser carbon tow, as well as a “strong+Lite” Aramid Space layup. All of our Steigs have Hyperion D09s installed in the wing at the factory! We can also special order other layups, just let us know what you would like ;-).
We also carry custom wing bags and ballast kits for the Steigeisen 😉
The SUSA Steigeisen comes 2.4 Ready!
Steigeisen RACE Recomended CG 73-76mm