Need help with German pilot Willie Gerner
 

Hi,
I´m trying to help a Brazilian writter with details about Willie Gerner career in the Luftwaffe.
It´s known he did test flights with the Me 262. In the first war years he flew sailplanes in the Russian front and during a mission did a emergency landing in the enemy territory being able to return safe.
He imigrated to Brazil in 1954 with his family and passed way in 1985.
Any help very welcomed.
Thanks in advance.