A few nice prototype components images I found:
BrickArms MPC Prototype
Image by enigmabadger
Just my own quick shot of the BrickArms MPC prototype! It’s truly a fun accessory with a near limitless number of ways to use its different components in building
G-92 “Krut” Jet Fighter
Image by Backward Matt
For too long the engineers of the Kingdom’s navy laughed at the engineers of the air force, and for good reason; the Sky Ram produced by Meloa Industries was a disastrous little plane and paled in comparison to the Neustrasian’s Maelstrom offer.
But no more; after the -ahem- "perfectly legal" "acquisition" of the next generation jet engine prototype developed by the MURICANs, a secret project was contracted with Piccolo Aircraft. The majority of Meloa Industries personnel left to make naval versions of the Maelstrom for the leading naval designers, but a few
crazy, stubborn determined individuals joined the struggling engineers of Neustrasia’s Mayenne and a Georgian firm, founding Piccolo Aircraft which worked under the radar (literally, in some cases) to develop the Piccolo G-92 "Krut" to outdo all other jet fighters ever made up to that point. After 92 different design prototypes (most of them dying as wooden models in air tunnels) based of the Manchot, Direwolf and maybe a few stolen Germanikan fighters, the design team went through forty six pounds of coffee beans, five of some of Neustrasia’s best pilots, a few water blessings to purge demon spirits, and a particular rich man’s life savings going to charity after losing a bet; the fighter flies, and it flies well! So well, in fact, that many of its components are classified. :^)
Also, unknown to most of the world, but very perplexing to the military leaders of Neustrasia, all their best pilots not already out for active duty were mysteriously re-assigned. This is why; the best pilots of Terra get to fly the best fighter of Terra. 8^)
Note that all of that rambling is flavor text for the fictional universe of D&C IV, which is set in an alternate 1947.