These types of discussions are always entertaining, but at some point reality has to rear it's ugly head.
How many types/classes of submarines past and present have retractable bow planes?
How many have retractable stern planes?
How manyfolks think the bow planes are retractable only to protect them from pier/docking damage?
I am no expert, but as far as model submarines go, I have shot underwater video ofprobably 50 different models of all types and no model with bow planes in my library has matched the performance of a properly balanced Albacore or Skipjack.
They run like they are on rails.