SZD-13 Wampir
# SZD-13 Wampir

The SZD-13 Wampir (Szybowcowy Zakład Doświadczalny - Glider Experimental Works) was a single-seat tail-less glider designed and built in Poland from 1955.

## Development

The SZD-13 Wampir was a development of the SZD-6X Nietoperz, using a NACA laminar flow aerofoil. Main designer was Irena Kaniewska. Wind tunnel tests on the prototype were not encouraging, so it was not flown, in favor of the more advanced SZD-20 Wampir II.

## Specifications and predicted performance (SZD-13 Wampir)

Data from http://www.piotrp.de/SZYBOWCE/pszd13.htm

General characteristics

* Crew: 1
* Length: 3.64 m (11 ft 11 in)
* Wingspan: 15 m (49 ft 3 in)
* Wing area: 16 $m^2$ (172 sq ft)
* Aspect ratio: 14.1
* Airfoil: NACA laminar flow

Performance

* Maximum speed: 210 km/h (130 mph, 113 kn)
* Stall speed: 57 km/h (35 mph, 31 kn)
* Maximum glide ratio: 29.4 at 75.5 km/h (46.9 mph/40.8 kts)
* Rate of sink: 0.64 m/s (126 ft/min) at 63.5 km/h (39.5 mph/34.3 kts)
