So Elon Musk on Wednesday tweeted:
After people started asking questions about it, he also voluntered: “aiming for orbital flight by June (2019)” and “won’t land propulsively (…). Ultra light heat shield and high mach control surfaces are what we can’t test well without orbital entry. I think we have a handle on propulsive landings.”
This has led to some further discussions and speculations about what exactly Elon Musk has in mind specifically; amongst others it was discussed by Scott Manley (here:https://www.youtube.com/watch?v=adSY9nek1Hg ) and Tim Dodd, the Everyday Astronaut (here: https://www.youtube.com/watch?v=CSCmC7p0Ud0&t=3279s at 28:00). I can really recommend those two discussions.
Here’s an illustration of how that might look like by Twitter user @itagakikeisuke1:
I also put my two cents in, in the comments of the two above mentioned videos and here’s what my toughts were (for reference, Scott was suggesting that the mini BFR Ship might be more of a Falcon 9 second stage with fins and a heat shield rather than a bonafide miniature BFR Ship):