In an answer to this question Are the US shuttle and Buran the only space planes to have launched vertically with wings exposed? Schlusstein mentioned the proposed MAKS system, which was new to me.
(image by By Titutik at Russian Wikipedia, CC BY-SA 3.0, https://commons.wikimedia.org/w/index.php?curid=29868251)
It sounds pretty interesting but I'm having trouble visualizing how this sat on/was carried by the Antonov 225 carrier plane. Is there any concept art or photos of how the mated vehicles looked? My google search has been fruitless - maybe I need some Russian terms.