In my early days on the FunBus, I recall doing some trial support for Boscombe. They were flying an F2 in a 4 tank fit and wanted to try some AAR.... If I recall correctly, we had to go down to about FL150 and use no more than 20° AoB - even then it really struggled trying to stay in contact.
I'm not sure which tanks the F2 was carrying, but I don't think that they were Hindenbergers?