SteveK
Guru
- Joined
- Jul 5, 2019
- Messages
- 5,141
- Location
- Gulf Isalnds BC canada
- Vessel Name
- Sea Sanctuary
- Vessel Make
- Bayliner 4588
Curious if it came that way. Looks like it would keep trap lines at bay too.Love the protection our setup provides
Curious if it came that way. Looks like it would keep trap lines at bay too.Love the protection our setup provides
Curious if it came that way. Looks like it would keep trap lines at bay too.
She came with it.
Most trawlers (working) seem to
Info below on advantages, claimed better speed, bollard pull and fuel economy at lower speeds.
The Propeller Pages - Nozzles
Chiming in as a rookie to the TF site but a veteran of boating and working offshore and in hazardous marine environments.
When an engine fails and you are in a storm, in a narrow channel with busy traffic, coming inland via the breakers or dikes, or the wind or current is moving you towards imminent danger, you will be calling on your God, be he Jesus or Poseidon, you will at that moment wish you had a second engine.
Chiming in as a rookie to the TF site but a veteran of boating and working offshore and in hazardous marine environments. When an engine fails and you are in a storm, in a narrow channel with busy traffic, coming inland via the breakers or dikes, or the wind or current is moving you towards imminent danger, you will be calling on your God, be he Jesus or Poseidon, you will at that moment wish you had a second engine.
A sales guy kept trying to push me towards buying a single engine trawler that had a bow thruster, and I’m just as persistent “ How in the hell is that bow thruster going to get me home”?
It’s a personal decision regarding 1 or 2 and advantages to both. I am currently in Ventura Harbor which has a large contingent of squid boats. Many come down from AK for the season here. They range from about 40 to 80 ft and I always enjoy walking the docks and talking to them when I am here. EVERY single one of them, is a single screw.
Unfair comparison.
Next time ask them about engine problems. I will guess each is well maintained, used often and the crew can make underway repairs. They probably replace items before the long trip that many pleasure cruiser waits to fail.
Unfair comparison.
Next time ask them about engine problems. I will guess each is well maintained, used often and the crew can make underway repairs. They probably replace items before the long trip that many pleasure cruiser waits to fail.
Best not get a job on a working trawler or a ship that travels the globe.
Most run singles.
Well since those vessels mentioned above have full time engine room crew to keep her going, and engine(s) that have the capability to run on half the cylinders while work is being performed on the other half. I guess I will be relegated to sending the wife down below to breath live back into the blasted beast as we drift towards Scylla or worse Charybdis
The fallacy I see in Kapodisn's argument above is the assumption a complete propulsion failure is more likely with one engine than with two. I strenuously disagree. Unless the twin screws are mounted on heavy struts with skegs beneath them -- something I've seen only a very few times -- it is far more likely that you will loose propulsion due to damage to both shafts than to an engine failure. Log or grounding damage is much more common than a diesel engine failure assuming you have proper triple fuel filtration.
I also disagree that twins are more maneuverable, but that's a much more subjective decision.
My peace of mind comes from having much better protection underwater.
Jim
It depends on the boat. Our last boat, a President 41, had twin engines. We were going up the Hudson early in the spring in 2016 and hit submerged objects, I assume trees since there were a lot of them floating in the river, about 12+ times. Some were hard enough to make the whole boat shudder. I thought well we have spare props so we can always change them out. When we got home and had the boat hauled there was absolutely no damage to the props. Now out Formula would sustain severe damage to the props in the same situation because it doesn’t have a keel. So I don’t buy that all twin engine bolts are likely to have prop damage if you strike something.
I suffered a failure of the DriveSaver coupling.
Nope, it's twins for this guy, every day, every boat.
Your typical 5kW Kohler may push you along at 1 knot... downwind.
,
.....Buy a SeaTow membership.
Thanks for sharing. For me my personal choice, I am with you, twins for every boat.
Question. On the DriveSaver coupling, if you have an extra on hand would that be able to resolve the situation you encountered?
Yup, you are 100% correct but I still rather twins. And not all boats with twins have the same level of risk of damage. My boat, a DeFever 44, has a full-length keel such that the leading edge of the props are about four inches above the keel. While not as protected as a single, the risk is not nearly that of the naked running gear found on many boats.Most single screw boats protect the wheel behind a keel. With twins, they are generally more exposed, so damage to one screw is certainly easier to see happen. What this means is that those with twins love them because they may have experienced damage to an exposed screw so are grateful for the other. Single screw folks don't have that experience since their prop is better protected. That, plus the 1/2 maintenance hassle may explain why most commercial vessels in the size we putt around in are singles.
While I understand the sentiment here - that twin owners have more experience with engine failure due to prop exposure - the bulk of the assertions are bunk. There simply is no denying that twins offer some level of redundancy - what is debatable is how much risk is mitigated and what are the tradeoffs. That can be a really personal calculus, it is for me.Most single screw boats protect the wheel behind a keel. With twins, they are generally more exposed, so damage to one screw is certainly easier to see happen. What this means is that those with twins love them because they may have experienced damage to an exposed screw so are grateful for the other. Single screw folks don't have that experience since their prop is better protected. That, plus the 1/2 maintenance hassle may explain why most commercial vessels in the size we putt around in are singles.