Originally Posted by
tremblerman
The "coke bottle"shape of the F4 was straightened out to get the Spey in. This affected the area rule characteristics.
The 7 tank was not in the fin, it was the last tank between the engines. It was permanently locked closed, valve controls in the right undercarriage bay (I think).
It was not used because it was prone to venting on rotation, straight on to the reheat flame.
Thank you for that. I was well aware of the area rule design... and why. That said, I forgot the exact location of the No7 tank....it's been a while since I spent several weeks incarcerated in a classroom located in the heart of the Lincolnshire tundra.....
