Born in Elmer, Minnesota Flying Officer Langmack earned a degree in Mechanical Engineering in 1927. He chose to fight in WWII prior to when the United States entered the war, so he joined the Royal Canadian Air Force. While serving with the Detachment Suffield Alta he died when the Westland Lysander MK III Aircraft #417 he was co-piloting crashed in Medicine Hat, Canada. He was survived by his mother and brother.
https://www.findagrave.com/memorial/15056917
http://www.veterans.gc.ca/eng/remembrance/memorials/canadian-virtual-war...
https://oregondigital.org/catalog/oregondigital:fx71bm025#page/15/mode/1... (pg 15)
https://oregondigital.org/catalog/oregondigital:fx719v09c#page/489/mode/... (pg 489)
https://oregondigital.org/catalog/oregondigital:fx71b965k#page/5/mode/1u... (pg 5)
https://oregondigital.org/catalog/oregondigital:fx719t26t#page/16/mode/1... (pg 16)
https://oregondigital.org/catalog/oregondigital:fx71bm01w#page/14/mode/1... (pg 14)