Helo drone maker unveils new electric aircraft for maritime, covert missions Helo drone maker unveils new electric aircraft for maritime, covert missions arif2020-09-22T22:07:15+00:00 JERUSALEM — Unmanned helicopter maker Steadicopter has created two new models of its rotary Helo drone maker unveils new electric aircraft for maritime, covert missionsarif2020-09-22T22:07:15+00:00