First a pilot is an experimental undertaking prior to full scale operation. Micro is a modest one.
Also, a blimp is a test balloon filled with hot air ever since the Hindenburg put the crapper on helium, thanks a lot.
Finally, blimp is an quasi-acronym of sorts for BLog Is MicroPilot — a mnemonic rebus. I have a hard time keeping up with all this stuff (it’s not attention deficit, I’m distraction wealthy). I need a pun to remember the name of my own blog.