On Thursday, December 10, 2015 at 10:27:55 AM UTC-6, Jonathan St. Cloud wrote:

I wonder why the other manufactures have not noted the Antares electric motor and moved to have that as an option. Are there downsides? I thought the Antares showed a lot of original thought. I did not buy one for other reasons though.

Arcus E uses electric for self launch. From the SH website, "...produced in cooperation with the company Lange Aviation..."