601
Hi flying68 yes i have operated a 601-1a with a tail tank,basically it gives you the climb to cruise.601,s will burn roughly 3000lbs in the first hour.
Gama operate a 601-1a with a tail tank, you can,t miss it it is painted in the oakley sunglasses paint scheme.The owner has a great sense of humour!!!Be very carefull if your buying a 601 on a budget, there are many undermaintained ones out there, that have been abused.Get a good engineer to look at it or get a pre buy done by Ruag in Germany.Pm me if you need any more,