The reason why PLo9 is having truble running his sub is that the sub is, one loseing forward speed as the stern props are cavitating the more the bow sinks .
Secoundly the bow has no operable dive plains so rapid change in attitude angle is not done to dive the sub and then maintain the desired water depth.
He has not finished out his sub in my opinion.Scale has nothing to do with it because we are dealing with the same rules and medium
I THINK THE DISCUSSION IS MAKING EVERYBODY CONFUSED WITH EVERYTHING

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1) FIRSTLY THE SUB IS RUNNING QUITE GOOD EVEN IN THE OPEN LAKE ERIE. THE STERN IS HIGH BECAUSE I DID NOT BOTHER TO OPEN IT UP TO TRIM IT AT THE BEACH AS THERE IS NO BENCH TABLE THERE.
2) THE JOKE ON ' NOT RUNNING GOOD BUT TASTING GOOD ' REFERS TO THE CUCUMBER ITSELF.
3) THE TYPHOON SUB HAS CONTROLLABLE BOW PLANES, BUT FIXED STERN PLANE.