15. Which tank destroyer was created by Ferdinand Porsche to fight in Operation Zitadelle, but suffered from many fatal problems?
From Quiz The Tank Destroyer Menace
Answer:
Elefant
Operation Zitadelle, the third major campaign against Russia, was delayed by Hitler so the 90 Elefants could have their problems fixed. Even so, as the offensive began, the Elefants still had many bugs, both minor and major. One of the biggest problems was that although the gun was quite effective against armor, the Elefant had no defense against determined Soviet infantry anti-tank squads. Most of the Elefants were killed by the Soviet tank-killers, and the remainder were outfitted with machine guns and used as stopgaps for the rest of the war. The Nashorn was Germany's second attempt at a Panzerjäger, using the same chassis as a Hummel, which was a self-propelled artillery piece. The Jagdpanzer IV was a tank destroyer based on the versatile Panzer IV chassis.