- Steve_Adamski
My main question for you all is regardless of original intention, wouldn't schurzen still provide protection against hollow charge weapons? It seems to me that it would. Spaced armor should weaken the jet of hot material.
They would. I'm not aware of any German tests suggesting that the Germans were aware of it*, but the British were looking into Schürzen as protection against HEAT weapons in 1944 and their results show that the German setup of Schüurzen on Panzers III and IV and StuG III and IV would likely defeat the 95mm HEAT shell fired from a gun and hits by the PIAT on most parts of the vehicle protected by Schürzen. But larger, un-spun HEAT rounds could probably bridge the gap, so to speak, and penetrate the main armour.
- Steve_Adamski
I would expect that the Germans figured this out and that is why so many later war vehicles still carried the schurzen ... long after antitank rifles were able to do anything serious.
The Schürzen protected the 30mm side armour of the German AFVs mentioned above and that armour remained 30mm right up to the end of the war, just as the Soviets continued to use large numbers of anti-tank rifles until the end of the war. Even the Panther had to wear a "miniskirt" to deal with the menace of the Soviet 14.5mm AT-rifle
Am I correct in this thinking? If they do weaken the penetrating ability, any idea by how much on average?
Judging from the British tests, it would appear that the PIAT with its 100mm armour penetration could defeat a 6mm skirting plate, 30cm of space and then 32mm of armour + 14mm of mild steel (target was a Centaur). It was soundly defeated by 6mm of skirting plate, 48cm of space and 32mm of armour plate with 14mm mild steel backing. With the same setup and 38cm of space, it would make a bulge in the main armour, but not penetrate.
Results would of course be different with thicker skirting plate, more or less space and thicker or thinner main armour, so finding an average based on this would be rather difficult 
Claus B
*They did test their own gun-fired HEAT against a 20mm armour plate spaced some 10-15cm from the main armour of a Panzer IV. It defeated the round, but the armour was shattered and broken, so it would've been a one-shot protection. Same thing with the 6mm plates in the British test - the gun-fired 95mm round made a complete mess of the plates but failed to penetrate the main armour. But with half the 6mm plate gone or knocked off its rails, it may not have worked well against the next round 