Home Electric Aircraft Honeywell and Denso Collaborate on Electric and Hybrid Powertrains for UAM Honeywell and Denso Collaborate on Electric and Hybrid Powertrains for UAM 10 Jun 2019 | Electric AircraftHybrid AircraftNews Honeywell and Denso Collaborate on Electric and Hybrid Powertrains for UAM Honeywell will partner with Japanese automotive manufacturer Denso to develop hybrid-electric and electric powertrains, with an emphasis on the UAM market.