But even so, they say, both companies' plans involve large spacecraft that rely on electronics and software designed specifically for those systems.
History shows some reason for concern when large spacecraft come down, though none are known to have caused serious injuries, deaths or major property damage.
Perhaps it was the sheer scale of the spacecraft, so much larger than anything ever built by human beings.
A large spacecraft suddenly crashes through the studio roof.
That was another thing he hadn't anticipated: while exploring a large spacecraft from the future, your feet could begin to hurt.
An extremely large spacecraft is approaching Stardown from the east.
After that they translated us to a larger conventional spacecraft.
It is the largest scientific spacecraft to be carried into orbit by a shuttle.
The space agency is reluctantly shelving plans for large spacecraft in favor of ones that are relatively small and simple.
Their largest spacecraft are not even as big as this car.