V-80 in 1936: does it actually change anything?

Walther proposed a perhydrol submersible in 1934 to the German Navy who promptly rejected it. Doenitz helped with funding in 1937, by 1939 we have a submersible doing 28 knots underwater with *lots* of kinks to work out. Had Walther gotten funding in 1934 and a working prototype in 1936, what impact does this have on German subs? Will the long-range Walther submarine that eventually became the Type XXI come online two years earlier, and if so, what of the Type XXVI follow-up? Or does it become another boondoggle of wasted resources for a spectacular failure?
 
Hydrogen Peroxide is just too dangerous for wartime subs, so maybe it will lead to the Electroboats but by itself it won't change much...
 
Agree. The experimental USN X-1 had issues as did the Soviet QUEBEC class, the X-1 got a conventional engine and the Quebec's got scrapped.
 
How about fixing torpedoes?

Prewar high speed subs were not required because the U boats were supposed to attack on the surface at night.
 
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