Alfonso Lebron-Berges wrote:

How about making the fan swivel to get out of the way of the
airstream when it is no longer needed? Would generate less drag and
keep the fan hidden from the effect of that airstream and high temp.
Something similar to the proposed backup fan/alternator but
internally instead of externally. A switching device could be
included so the fan activates when deployed and shuts off when
retracted.

Alfonso Lebron-Berges

 
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