Impossible Aerospace founder and CEO Spencer Gore hopes to make self-flying electric planes that would make jet fuel — and the pollution from burning it — obsolete.

But he’s starting small by building battery-powered electric drones.

The company’s flagship product, dubbed the US-1, can fly for about two hours on a single charge, about as long as a helicopter can fly on a full tank. Gore describes the small unmanned aerial vehicle half-jokingly as “a battery with propellers attached.”

More than half of the mass of the US-1 is made of battery cells and the entire structure serves as one big battery pack.

Impossible Aerospace shares DNA, and a clean energy mission, with Tesla.

Before he caught the start-up bug, Gore worked as an intern at two Elon Musk-led companies, SpaceX and Tesla. He was offered an internship at the electric vehicle maker in 2014, and and later became a full-time battery engineer there. He accepted the internship even though he was still working on a…