Good Morning Edward,
first of all ...
Henrich Focke not Heinrich!!!
Henrichs sister was born in 1893,
his Brother Wilhelm in 1878!
I don´t believe that Wilhelm was a fighter pilot, because he lost his interesting in aviation after the financial "Ente" desaster in 1909 / 1910.
Henrich had never a pilots licence!
In autumn 1914 he served in IR 75 Bremen
a short time on the eastern Front,
then in spring 1915 to the Fliegertruppe (Thorn & Kowno) as an engine-mechanic.
1916 Malaria!
1917 Funkerlehrgang Döberitz
Fliegerabteilung A 248 (Seraincourt / Reims)
After a checkflight (as passenger) Focke´s pilot crashed the DFW C V.
Hospital, then Flugzeugmeisterei Adlershof.
Thats all ...
Hal