<p>The sole Altostratus is now on display suspended in the new entrance building at the Muzeum Lotnictwa Polskiego.
Krakow, Poland.
23-8-2013.
</p><p>The following info is taken from the museum's website:-
</p><p>"During 1952–1961 Józef Borzęcki designed and built a motorglider called Stratus. It was initially powered by an engine from a Czech chainsaw and wings from Żuraw (crane) glider. It initially featured classic flight control system with a control stick and rudder pedals, subsequently replaced by a “coupled” control system, designed by Borzęcki, in which the stick was used to control the aircraft in all axes (pitch, roll and yaw). It was aimed at facilitating flight training and increasing comfort in non-professional conditions. During 1961–66 the Stratus was flown illegally and in secrecy.
</p>
In late 1960s the constructor undertook a rebuilding process. The aircraft was fitted with wings from Komar (mosquito) glider, lighter and providing better glide ratio and flat two-stroke four-cylinder RB2 engine, designed by J. Borzęcki out of two connected Riedel starter engines from German Junkers Jumo 004 turbojet engine from World War II. After this rebuilding the motorglider was named Altostratus and first flew in 1972. It remained in use till 1982."
<bdi><a href="https://www.wikidata.org/wiki/Q33132025" class="extiw" title="d:Q33132025"><span title="photographer from the UK">Alan Wilson</span></a>
</bdi>
<a rel="nofollow" class="external text" href="https://www.flickr.com/photos/ajw1970/14182526419/">Borzęcki Altostratus [ID Unknown]</a>