John Eaves: "...the rejected idea (of the Vulcan Rescue Ship) came from a football shape cut open like a sandal,...". (johneaves.wordpress.com - May 7, 2009) It's called DSRV (Deep Space Rescue Vehicle).
design scetch by John Eaves (johneaves.files.wordpress.com)
The DSRV is very accurate. I only added some lines on the down side of the upper section and I have sanded a lot of material from the small wings so that they fit more to the original.