Originally Posted by
safetypee
As I recall, the larger 'finlets' were associated with the probe installation because the basic aircraft had a mild PIO, dutch roll, when tanking.Initial evaluation in the 'reprogrammbale' design sim at Hatfield considered several different fixes.
Spot on. The aircraft would yaw upto about 1.5 degrees per minute and was a sod doing astro. Obviously this became more apparent and a problem during AAR. Sticking two pair of VHF aerials was probably a quick and dirty fix. The larger fins were obviously a later design and manufacturing job. Whether they were fitted for Loral and with Loral is another matter. Maybe better stability would improve bearing accuracy.