Alaka’i Technologies, a Hopkinton-based aviation company with around 30 employees in Massachusetts, emerged from stealth mode on Wednesday by revealing Skai, a flying vehicle powered by hydrogen that can carry up to five passengers.

Boston Biz Journal https://www.bizjournals.com/boston/news/2019/05/29/alaka-i-a-startup-designing-a-hydrogen-powered.html?ana=RSS&s=article_search