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I Ae 41 "Urubú" (Eaglet) 

The project of this two - place, side by side flying wing glider begun in 1951 in the Instituto Aerotécnico at request of free flight clubs and made his first glides in 1953. Five units were built and one of them, with Heinz Scheidhauer at the controls and escorted by Claudio Dori in a "Sky 34", made in historical flight in October 30 of 1956; the first glider crossing of Andes' Cordillera*, previous arrive to San Carlos de Bariloche from Córdoba, in air - tow by more than 1000 km!. 

In this 18 meters class machine were capitalized all the hits and corrected all the problems found in the I Ae 34. It was a very simple to fly machine and stable in turbulent air, in contrast with its predecessor, whose wing - tips had a stall tendency in similar conditions. Also landings were made easier with a tandem gear with extra - soft shock - absorbers. 

During the design provisions were made for the installation of a 30 to 50 H.P. pusher engine with retractable propeller and years later some Urubú (known as Ho XVc) were built in Germany. 

  
First glider crossing of Andes' Cordillera: 

The idea of Andes' Cordillera glider crossing arises from the initiative shared by Dirección de Fomento de Aviación Civil and Instituto Aerotécnico. The trip will be done by a "Sky 34" and a "Urubú", pertaining to each entity. 
As starting point was chosen the San Carlos de Bariloche airport. Specialized personnel from both entities was assigned to that place in September of 1956 . 
Heinz Scheidhauer with the "Urubú", towed by a "Moranne Saulnier" would represent the Instituto Aerotécnico and Claudio Dori with the "Sky 34", towed by a "Stearman" the Dirección de Fomento de Aviación Civil. 
Once the task plan was made, it was necessary to wait a suitable day to do the crossing, as after beginning it, there were no chances to step back. It is important to remark that, no matter the experience and hierarchy of both pilots, it was not very common to fly among peaks in a flat land as ours. 
In October 30 ideal atmospheric conditions were met and without delay  the couples "Urubú - Moranne Saulnier" and "Sky 34 - Stearman" took off. 
Once released from the towing - plane, both machines headed for Cerro Otto, but Dori stayed behind because of a condor that almost striked him. 
At a height of 3000 m. both pilots left behind the Catedral and Goye peaks, arm Tristeza and Puerto Blest. Scheidhauer directed to Tronador peak, flying over the south of Frías lagoon, passing near the Lanín vulcan and El Puntiagudo and Osorno peaks. 
The "Urubú" landed after three hours of flying, and the "Sky 34" twenty minutes later; in place Ensenada in Chile. 
The return was done fifteen days later due to bad atmospheric conditions, marking another hit: They returned towed by the "Moranne Saulnier" and "Stearman". 
 

 
Wingspan 18.00 m.
Fuselage length 05.80 m.
Height 01.90 m.
Wing area 28.00 m2
Empty weight 250 kg.
Total weight 450 kg.
Payload 200 kg.
Maximum glide speed 200 km/h
Landing Speed 52 km/h
Best glide ratio 1:24 at 81 km/h and 15.2 kg/m2 loading
 

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