It is all fun until you are feeding fuel to two of these...
It did however get to dive sites rather expediently.....
It did however get to dive sites rather expediently.....
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Definition of redundancy pertaining to engineering:If you lose one of your two engines you are not adrift powerless at sea. You have redundancy!!
It would be smarter to rig each engine with its own control system, fuel storage, filtration and delivery system as well as an independent battery. It would also be unwise not to be able to switch fuel, battery etc, from one engine to another. Twin engines can deliver a certain degree of redundancy and it can be enhanced or ompromised depending on how the boat is riggedThere is no way to power that hull from a single 300.
And in most cases dual outboards are less efficient (HP wise you have almost twice as much drag from the skeg) and end up failing together when they fail because fuel issue (water, bacteria, and/or sediment) take out both engines anyway. Sort of like bad gas taking out a set of doubles even if they are not synonymous.
Shinny! I like shinny!It is all fun until you are feeding fuel to two of these...
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It did however get to dive sites rather expediently.....
Unless you have a catamaran as I do. One engine would be pretty squirrely with two pontoons.Twin screws come into play when docking. You can just about dock a twin screw boat without steering. One forward, one reverse. Nearly a bow thruster. To a skilled caption.
To an unskilled weekend skipper, it's just 2 levers to push in the same direction instead of 1.
If you know what you are doing twin screws are functional. If you don't, they are redundant.
My weekend skipper duties, single. I know what twin screws can do, doesn't mean I can do it. But I am impressed when I am on a boat with a caption who can.
It can also be pretty funny to watch a weekend skipper trying to move his twin engine boat after one engine stalls and they don't realize it
Also twin engine will typically have redundant electrical system. If the charging system on one engine dies, there is another charging system. May not be enough to keep all the toys powered up, but enough to keep 2 engines powered up. There can be more failures besides just if the engine runs or not.
While at it, how many outboard engine options are there in the 150HP class? And the 300HP class?
A hull designed for one engine or two?
Cost of the engines is generally negliable, they will add up to about the same. But what about mainteneance? Twice the number of seal, twice the props, twice the water pumps. So the twin will cost more to keep running.
Not nearly as cut and dry as some of you are trying to make it out to be. Redundant to make it back on only 1 engine, that is one of the least of the reasons.
Except that fuel contamination typically happens at the source tank on the fuel dock moreso than in or on the water. When it does happen on the water its often a fuel separation issue due to age which also hits both tanks anyway. Or #1 cause? Just plain out of gas. None of which redundant engines solve.It would be smarter to rig each engine with its own control system, fuel storage, filtration and delivery system as well as an independent battery. It would also be unwise not to be able to switch fuel, battery etc, from one engine to another. Twin engines can deliver a certain degree of redundancy and it can be enhanced or ompromised depending on how the boat is rigged