Decurion
After I reviewed the documents I am a little bir confused with your comment:
The spillage drag is also likely to increase due to the reduction in airflow through the engine.
With the term "Spillage Drag" I understand the drag formed as forcing some intake air around the engine rather than through the engine due to locked fan. That makes sense, this makes an increasing drag however -what I understand from first document`s initial paragraphs- the
"internal drag" not increase, on the contrary decreases with a locked engine. At the end, there is no clue that in which direction (decrease or increase) the whole drag (total drag) of the engine changes.
Do I miss something?
If you can kindly explain.
Thanks