Archer Aviation Inc. (NYSE:ACHR) shares are ripping higher, with roughly 19.6% gains in a single session. The market move comes after Archer, with Anduril, unveiled its Thunder autonomous vertical takeoff and landing defense craft, which is designed to accompany crewed aircraft and helicopters. Archer Aviation (ACHR) Gains 20%, Should You Buy This Penny Stock? At the Farnborough Airshow on July 20, Archer Aviation Inc. (NYSE:ACHR) and Anduril unveiled a jointly developed, series hybrid-electric VTOL platform built for both defense and commercial missions. ​Rocky Five Years Since IPO​This platform holds immense importance for Archer Aviation as, even after 5 years since its IPO, the company does not generate meaningful revenue.