The Hindenpeter was a zeppelin owned by Peter Griffin. It is grey, with Peter's face molded into the front of the balloon part. However unlike the Petercopter which also has his face on it, the Hindenpeter seems to have Peter's whole face on it where the Petercopter literally looks like a half Peter. Its name is a portmanteau of "Peter" and the "Hindenburg", a famous early 20th century German zeppelin named after German President Paul von Hindenburg that exploded after a spark ignited its highly-flammable hydrogen gas which it used to stay afloat.
The Hindenpeter appears in "The Cleveland-Loretta Quagmire" shortly after the appearance of the Petercopter. Like its predecessor, it crashes into the Swansons' property. Joe questions how Peter could afford both aircraft, which still remains a mystery.