Speaking of diffuser rings, why...
11-01-2007 | 09:18 AM
#11
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Joined: Mar 2002
Posts: 5,143
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From: Cajun Country
Cool video. Agreed, the similarities between air and water are very close. Of course the big factor is the density difference.
Submerged applications have had major advances in recent years. Look at the Azipods used in ship applications.
A very similar application to that is the new Volvo drive http://www.volvo.com/volvopenta/glob...PS/howitworks/
designed to replace the traditional shaft/propeller/rudder design. It puts the propeller in front of the hardware thus getting clean water.
True surface designs don't require this as the shaft and mounting hardware is above the water when at speed.
I have often wondered why a "speedmaster" style of lower never became a reality with the Bravo drive. Since it shifts in the top one could make a small diameter lower. Almost all high performance applications use through hull exhaust so the exhaust is not an issue on these applications.
Recent airplane designs show that a pointed trailing edge is not the most efficient design. A flat trailing edge is more efficient. Makes you wonder if Volvo knew this when designing the IPS system.
Submerged applications have had major advances in recent years. Look at the Azipods used in ship applications.
A very similar application to that is the new Volvo drive http://www.volvo.com/volvopenta/glob...PS/howitworks/
designed to replace the traditional shaft/propeller/rudder design. It puts the propeller in front of the hardware thus getting clean water.
True surface designs don't require this as the shaft and mounting hardware is above the water when at speed.
I have often wondered why a "speedmaster" style of lower never became a reality with the Bravo drive. Since it shifts in the top one could make a small diameter lower. Almost all high performance applications use through hull exhaust so the exhaust is not an issue on these applications.
Recent airplane designs show that a pointed trailing edge is not the most efficient design. A flat trailing edge is more efficient. Makes you wonder if Volvo knew this when designing the IPS system.
