Hopefully - The Definitive Answer
Ok,
Here we have the definitive answer Troops.
German Technical - Klappe = flap, valve, hatch, damper.
Took some finding but:
All Extracts taken from D 656/21 Manual. Pages 75, 97, and 98
Page 75 Exhaust System
Second Paragraph mentions that there is a hinged Flap which is held/kept open by a bolt.
Last Paragraph: Basically Translated says;
The Flap is closed for underwater driving in that the bolt is removed, which hangs on a chain. Exhaust gasses force the flaps open against exterior water pressure.
Page 97 - Preparation for For Underwater Driving
15: Sperrbolzen der Auspuffklappen lösen - Remove Locking Bolt from the Exhaust Flaps
Page 98 – After Underwater Driving
7: Auspuffklappen mit den Sperrbolzen festsetzen - Secure Exhaust Flaps with Locking Bolt.
So the Exhaust Flaps do not get secured in the closed position for submerged driving - hence no gasket or seal needed.
They act like Flappers whilst submerged
Hope that helps solve the mystery or any confusion - unless you know differently
Kind regards,
Pete.
Ok,
Here we have the definitive answer Troops.
German Technical - Klappe = flap, valve, hatch, damper.
Took some finding but:
All Extracts taken from D 656/21 Manual. Pages 75, 97, and 98
Page 75 Exhaust System
Second Paragraph mentions that there is a hinged Flap which is held/kept open by a bolt.
Last Paragraph: Basically Translated says;
The Flap is closed for underwater driving in that the bolt is removed, which hangs on a chain. Exhaust gasses force the flaps open against exterior water pressure.
Page 97 - Preparation for For Underwater Driving
15: Sperrbolzen der Auspuffklappen lösen - Remove Locking Bolt from the Exhaust Flaps
Page 98 – After Underwater Driving
7: Auspuffklappen mit den Sperrbolzen festsetzen - Secure Exhaust Flaps with Locking Bolt.
So the Exhaust Flaps do not get secured in the closed position for submerged driving - hence no gasket or seal needed.
They act like Flappers whilst submerged
Hope that helps solve the mystery or any confusion - unless you know differently
Kind regards,
Pete.
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