Regarding the bird ingestion test, does the test make any distinction between fans of different diameters?
One might assume that a larger fan has more robust blades and guide vanes than a smaller one therefore they can offer the same degree of resistance or survivability.
On the other hand a larger fan may be more susceptible to damage, for the same bird, if it is struck on the outer edge of the fan disc.
Also the larger intake will have a higher probabilty of catching a bird than a smaller one.
So, is it a one size fits all or do they factor in fan size?