First of all, the A-8/R2 was not designed specifically for ramming. It carried extra plating to protect the pilot and vital areas of the aircraft from fire it would receive by close-in attacks. The SonderKommando aircraft were usually stripped of armor and weapons as these items were considered moot in a ramming attack.
Might I suggest some reading:
Warplanes of the Third Reich - William Green
The Defense of the Reich - Werner Held
Luftwaffe At War - Galland & Ahnert
Last Days of the Luftwaffe - Albert Price
Focke Wulf - Fw-190 and Ta-152 - Heinz Nowarra
Fw-190 Design History - Vol. 1-5 - Kagero Monograph
Fw-190A/F - Aerodetail #6 (but you'll have to learn to read Japanese)
As other mentioned, there was one mission, it failed. Done.
A vehement, punch-you-in-the-face NO. Epic Fail. -10000000
Sorry for dragging this pathetic thread back from the dead.