On Friday, October 20, 2017 at 8:48:26 AM UTC-7, Steve Koerner wrote:
On Friday, October 20, 2017 at 3:51:04 AM UTC-7, wrote:
The official report does not provide any additional information.

http://www.asias.faa.gov/pls/apex/f?...R:NGLTRFD17001

Are we never going to know if this glider had a transponder?
Can someone who flies in the Chicago area please try to sort this out?

The official report lists the other aircraft (glider) as unknown. If it had Mode S, they would know.