----- Original Message -----
From: "Lorenzo Boelitz" lorenzo@backyards.biz
If you want to compare singles and twins purely on economics, take a look
at what's done around the world by commercial operators trying to squeeze
every nickel they can out of their boats in a competitive market. They
pretty much all have single mains and single screws. That's not to say that
twins aren't worth the extra money to the recreational boater.
REPLY
Great Lakes bulk carriers have twin engines and single screw. The
difference in power needed to go upstream against a 4 knot current is
considerable. The ore carrier I was on had twin 10,000 HP engines. A
gear box tied the two to a common shaft. We needed both engines at full
power to go upstream but when in a lake or going downstrean only one engine
sufficed.
Handling and rudder action never varied regardless of using one or both.
Volvo did make a few of these but the idea never caught on in the North
American recreational market.
Cheers
Arild
----- Original Message -----
From: "Lorenzo Boelitz" <lorenzo@backyards.biz>
If you want to compare singles and twins purely on economics, take a look
at what's done around the world by commercial operators trying to squeeze
every nickel they can out of their boats in a competitive market. They
pretty much all have single mains and single screws. That's not to say that
twins aren't worth the extra money to the recreational boater.
REPLY
Great Lakes bulk carriers have twin engines and single screw. The
difference in power needed to go upstream against a 4 knot current is
considerable. The ore carrier I was on had twin 10,000 HP engines. A
gear box tied the two to a common shaft. We needed both engines at full
power to go upstream but when in a lake or going downstrean only one engine
sufficed.
Handling and rudder action never varied regardless of using one or both.
Volvo did make a few of these but the idea never caught on in the North
American recreational market.
Cheers
Arild
