Schleicher ASW 20
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|---|---|
 UIUC-Version | |
 ASW 20 in landing configuration (JSBSim) | |
| Type | Glider aircraft |
| Propulsion | Unpowered aircraft |
| Manufacturer | Schleicher |
| Author(s) |
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| FDM | JSBSim, UIUC |
| --aircraft= | asw20 |
| Status | Early production |
| FDM |
 |
| Systems |
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| Cockpit |
 |
| Model |
 |
| Development | |
| Website |
 |
| Repository |
 |
| Download |
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| License | GPLv2+ |
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Development status/Issues/Todo
UIUC-Version:
Outside:
- flaps are not animated
- rudder, ailerons and pitch elevator are not animated
- top of the wings are not textured - aircraft has no shadow
- landing gears are not animated when retracting/lowering them
- model is taken from MSFS. FG does not support .mdl
3d Cockpit:
- 3d cockpit is not available
General:
- sailplane seems to have an inbuild engine, but that one is not visible or can't be deployed (there's also no bay doors for the engines)
- no hud available
JSBSim-Version:
The 15m flapped sailplane ASW 20 was converted from UIUC to JSBSim and considerably further developed. Focus was on the FDM.
Features are:
- accurate speed polars for all five flap positions
- good stall characteristics
- tailspin
- weight and balance
- water ballast
- rain impact on performance
- ground effect
- wing failure
- wing bending
- correct control surface deflections
- checklists
The original flight manual, speed polars and other valuable data of the ASW 20 is publicly available on the internet. A lot of this data is incorporated into this model (performance and handling). For the next development steps, fine tuning, the feedback of real life ASW 20 pilots is necessary.
To give an example:
In the flight manual you'll find this passage: "Even in stalled flight attitude (the vario will read 1,5 to 2 m/s sink in calm air, that is 300 to 400 feet per min.) ailerons and rudder work in the usual manner, as long as only half control deflections are applied. Full control deflections result in light wing dropping, whereas full deflected controls in opposite directions with stick pulled completely back will cause rapid wing dropping."
Try it out yourself!
External links
- Original ASW 20 Flight and Operations Manual (PDF)
- (de) ASW 20 brochure including speed polars
- ASW 20 brochure including measured speed polars
- Measured speed polars ASW-20(A)
- Luftfahrt-Bundesamt Geraetekennblatt Nr. 314; Ausgabe Nr.13; 20.02.1997 (PDF)
- Johnson, R.H., "A Flight Test Evaluation of the ASW 20," Soaring Magazine, May 1978 (PDF)
- Jones, Nathan H, "Glider Ground Effect Investigation" Thesis, Department of The Air Force Air University, Wright-Patterson Air force Base Ohio, USA, 1989, Storming Media, Washington DC 20002 (PDF)
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