Scanned from an 8x10 photograph that was part of a collection of aircraft photos with the De Havilland of Canada backstamp from circa 1946
The photo shows men holding up what appears to be a mock up of a powered glider, some of the lines in the photo have been inked in.
This is possibly one designed by Waclaw Czerwiński who was designing gliders at De Havilland at this time.