A cutaway illustration of the Bell D188A VTOL strike-fighter from the late 50’s/early 60’s. This Mach 2 aircraft would have used 8 small turbojets… two lift/cruise in the tail, two vertically mounted in the forward fuselage for lift and two each in wingtip nacelles that could tilt for VTOL or horizontal thrust. Often referred to as the XF-109, it was only called that in Bell PR material.. it never officially received that designation. The artwork below was scanned years ago at the Jay Miller archives.
There is more available on the D188A in two sources I highly recommend (because I wrote them):
1: Aerospace Projects Review issue V2N4. Jam-packed with info, diagrams, artwork of this and several variants.
2: US Supersonic Bomber Projects Vol. 2, which uses the D188A as the cover image.
If you’d like the full resolution version of the cutaway artwork, it has been uploaded to the 2023-07 APR Extras Dropbox folder, available to all $4 and up Patrons/Subscribers. If you would like to help fund the acquisition and preservation of such things, please consider signing on either for the APR Patreon or the APR Monthly Historical Documents Program.