The Air Force intends to begin soliciting proposals to upgrade its new personnel recovery aircraft next May and plans to award a contract in September 2021, according to a recent presentation to industry. The service hosted an industry day Nov. 20-21 and expects to hold another in March, followed by the release of a draft request for proposals in April, according to a notional schedule included in the presentation slides . The Air Force plans to purchase 113 Sikorsky HH-60W...