Sierra Nevada unveils cargo-only Dream Chaser with folding wings

The unmanned cargo-only version of the Dream Chaser spacecraft that Sierra Nevada Corp. unveiled Tuesday will have folding wings and an added cargo module attached to the back.

The changes from the crewed version of Dream Chaser, company officials said, will help add to the vehicle’s versatility as SNC vies for an estimated $14 billion in NASA contracts to carry supplies and experiments to the International Space Station from 2018 to 2024.

Landing a piece of the NASA cargo contracts would be a big boost for SNC, which bases its Space Systems division in Louisville. The company lost out last year to…