Reply
 
Thread Tools Search this Thread Display Modes
 
Old 01-09-2019, 10:27 PM   #21
Newbie
 
City: BAYVILLE, NY
Country: USA
Vessel Name: SEA SHARP
Vessel Model: 2005 CARVER 360 MARINER
Join Date: Nov 2017
Posts: 4
Through the years I have had the following: Single screw, twin screws and twins with bow thruster.
My absolute preference is the twins with thruster. The main reason for this choice is the home port where I dock my boat. She is a 36 footer with some windage issues and when I bring her in stern first with a strong outgoing tide and the afternoon southwesterly's, docking becomes a real challenge. The set up with twins and thruster helps tremendously.
__________________
Advertisement

Denpooch is offline   Reply With Quote
Old 01-09-2019, 11:28 PM   #22
Guru
 
BruceK's Avatar
 
Join Date: Oct 2011
Posts: 11,367
Started the tractor, attached the plough, but found the paddock has been ploughed, many times, already.
I prefer twins. I`ve had a single. Essentially I like the redundancy and the maneuvering benefits. I`d like a bowthruster as well. No point being hairy chested about it, if there are helpful features at reasonable cost why not have them.
__________________

__________________
BruceK
2005 Integrity 386 "Sojourn"
Sydney Australia
BruceK is offline   Reply With Quote
Old 01-10-2019, 12:04 AM   #23
TF Site Team
 
FlyWright's Avatar
 
City: California Delta
Country: California Delta
Vessel Name: FlyWright
Vessel Model: Marshall Californian 34 LRC
Join Date: Apr 2008
Posts: 12,977
I prefer the redundancy and maneuverability of twins but it depends on each boat.
You've got to be able to reach the essential maintenance items on each engine. I've seen a single with an ER the size of a large tuna can. My twins are sitting in a 12'x20' ER.
__________________
My boat is my ark. It's my mobile treehouse and my floating fishing cabin. It's my retreat and my respite. Everyday I thank God I have a boat! -Al

@DeltaBridges - 25 Delta Bridges in 25 Days
FlyWright is offline   Reply With Quote
Old 01-10-2019, 02:26 AM   #24
Master and Commander
 
markpierce's Avatar
 
City: Vallejo CA
Country: USA
Vessel Name: Carquinez Coot
Vessel Model: penultimate Seahorse Marine Coot hull #6
Join Date: Sep 2010
Posts: 11,970
Quote:
Originally Posted by FlyWright View Post
...
You've got to be able to reach the essential maintenance items on each engine. ...
Agree. Despite a small engine compartment, my single has easy access from starboard, port, and above, without any crawling. My engine mechanic loves it. (It's easier to concentrate loving attention on a single engine than on two.)
__________________
Kar-KEEN-ez Koot
markpierce is offline   Reply With Quote
Old 01-10-2019, 06:35 AM   #25
TF Site Team
 
Bacchus's Avatar
 
City: Seneca Lake NY
Country: US
Vessel Name: Bacchus
Vessel Model: MS 34 HT Trawler
Join Date: Nov 2014
Posts: 4,039
Having had a twin I never thought I could / would go "backwards" to a single.
After looking and considering the +/- and my situation of inland / Great Lakes boating the single looked reasonable.
The Mainship I found and liked was a single and already had B&S thrusters which might be the best of both worlds.
I can live w/o redundancy and the PM is a dream w SPACE in the ER.
__________________
Don
2008 MS 34 HT Trawler
"Bacchus"
Bacchus is online now   Reply With Quote
Old 01-10-2019, 07:32 AM   #26
Guru
 
O C Diver's Avatar
 
City: Fort Myers, FL... Summers in Crisfield, MD
Country: USA
Vessel Name: Slow Hand
Vessel Model: Cherubini Independence 45
Join Date: Dec 2010
Posts: 9,341
I prefer a single with a bow thruster for many of the above reasons. What I will add is that how a single engine boat is setup makes a huge difference in being easy to handle. Slow speed maneuvering with a single and small rudder can be very challenging. The rudder needs to be substantially larger and should swing 40 degrees to either side for outstanding slow speed and docking handling. The larger rudder and degree of turn allows you to push the stern to the side with very little forward motion. This makes stern in docking with the "back and fill" technique, quite easy. Also, being able to push the stern to the side with little forward motion and pushing the bow with a thruster, allows you to push the boat sideways to the dock for essentially parallel parking. There are other ways to accomplish this with spring lines, but a well setup single screw boat can be very easy to dock.

Ted
__________________
Blog: mvslowhand.com
I'm tired of fast moves, I've got a slow groove, on my mind.....
I want to spend some time, Not come and go in a heated rush.....
"Slow Hand" by The Pointer Sisters
O C Diver is offline   Reply With Quote
Old 01-10-2019, 07:46 AM   #27
Guru
 
ranger42c's Avatar
 
City: Maryland
Country: USA
Vessel Model: 42' Sportfish
Join Date: Aug 2013
Posts: 5,271
Quote:
Originally Posted by NewbieFromNJ View Post
PS the OP asked your personal opinion on your preference. Tired of responses to just do a search. Probably 99% of questions can be answered by search and this forum would just turn into another social media site. Not!

I don't quite understand your complaint.

A decent search usually turns up the "personal opinion" or "preferences" many have already written -- over and over and over and over and over again, on popular and generally unchanging topics like this -- so the OP's results would be the same.

Might be different if the query is about some kind of new/emerging technology or maybe a topic that's in flux for some other reason... but generally discussions about the pros and cons of singles/twins, anchors, and a few others, probably aren't gonna surface much if any new factoids, opinions, preferences... Somebody might say something in a different way than they've said it 30 times previously, and the different wording could perhaps be useful... but that's kind of a reach.

"Decent search" usually means using the Google or at least the Advanced versions, given the site's base search tool isn't great. And many new users don't know the base tool is so limited, so they don't always find much if that's the only tool they've tried...

Anyway, what do you see as the advantage of asking a commonly-asked question all over again? FWIW, I don't see it as a bad thing, just usually slow for my own purposes...

-Chris
__________________
South River, Chesapeake Bay
ranger42c is offline   Reply With Quote
Old 01-10-2019, 08:24 AM   #28
Guru
 
jleonard's Avatar
 
Join Date: Jun 2008
Posts: 3,983
I've been boating more than 30 years and have always had single engine boats.
Once I learned I have only had trouble maneuvering once or twice.
Had fuel issues a few times, always got them resolved (learn your boat).
Lost a belt once...keep spares aboard and do your PM. Easier to do with one engine.
Etc.
__________________
Jay Leonard

New Port Richey,Fl
jleonard is offline   Reply With Quote
Old 01-10-2019, 09:02 AM   #29
Senior Member
 
wpc691's Avatar
 
City: punta gorda, FL
Country: US
Vessel Name: Blue Bayou
Vessel Model: Hatteras 43MY
Join Date: Jun 2016
Posts: 143
One interesting advantage of twins that I’ve never heard mentioned: I woke up in an anchorage 25 miles from home to find the Schrader valve in the air-over-oil tank in my Hynautic steering system had failed, leaving me without steering. I decided to try throttle steering home; I cruised up the harbor, through the creek, down the canal and home, all at my normal speed, with no problem. Interestingly (maybe only to me), I found it much easier to hold the boat on course into the wind with the throttles than with the wheel. It makes sense when you think about the forces involved, but it would never have occurred to me to try it. And yes, I now carry a spare Schrader valve.
__________________
Punta Gorda, FL
wpc691 is offline   Reply With Quote
Old 01-10-2019, 09:23 AM   #30
Guru
 
Fish53's Avatar
 
City: Pitcairn Island
Country: yz
Join Date: Jul 2015
Posts: 689
I like large deep draft boats turning a single large propeller, a rudder to match and one good deckhand, but I'm sort of weird anyway. I've run singles, twins. triples, quads, bow thrusters, stern thrusters and oars but a single is my preference for just having fun at the dock.
Fish53 is offline   Reply With Quote
Old 01-10-2019, 10:58 AM   #31
Senior Member
 
Bkay's Avatar
 
City: Reedville, VA
Country: United States
Vessel Name: Wingspan
Vessel Model: Aluminum Catamaran
Join Date: Aug 2018
Posts: 409
Quote:
Originally Posted by Shrew View Post
Pulling up to the gas dock, I wish I had twins. Pulling away from the gas dock, I'm glad I have a single. Rolling in bad weather or a beam sea and I wish I had the extra speed of twins, however, doing maintenance, I'm glad I have a single.
OK - that's a pretty good response!
Bkay is offline   Reply With Quote
Old 01-10-2019, 11:01 AM   #32
Technical Guru
 
Ski in NC's Avatar
 
City: Wilmington, NC
Country: USA
Vessel Name: Louisa
Vessel Model: Custom Built 38
Join Date: Jan 2014
Posts: 5,836
One topic not yet discussed: Noise. I find the slight beat frequency created by twins annoying. Regardless of method of synchronizing rpm, they are never exactly the same (some computer engines are really close) and this creates a secondary noise frequency that varies.

If you want to demonstrate this on a twin, shut one engine down and run on one for a bit. Not only less noise due to one engine, but the secondary beat frequency is gone.

No doubt twins give more options regarding redundancy and maneuverability, but I prefer a well laid out single with bow thruster.
Ski in NC is offline   Reply With Quote
Old 01-10-2019, 12:00 PM   #33
Senior Member
 
City: tallahassee
Country: United States
Vessel Model: 1979 Mainship 34
Join Date: Aug 2016
Posts: 416
Quote:
Originally Posted by Seevee View Post
Mrwesson,

Good points, but some prefer a twin, both in top shape, and I could argue for that.

Engines DO quit and I know of several that have failed on Loopers, some in very awkward spots, like a lock. Loosing one on the Ohio, with current and traffic would be more than a minor inconvenience. And there are place where SeaTow isn't available and yes, we can be over 50 miles off shore.

You don't divide your maintenance time between two engines, your just about double it. That's the price for twins.

Now, I could argue that the risk benefit of a single could be argued as they rarely quit.

Do you really need a twin? Maybe, if that's your comfort zone.
To each their own but choosing twins over a single for maneuverability is kind of silly IMO. Yes you may need a bow thruster with the single but the trade off in economy is huge.

I may be biased because I get by with a single without a bow thruster and while I consider myself good it's always tricky backing into my spot in the river but it's made me better for it.

There are many good reasons for twins but I just don't feel like maneuverability is a strong one.. A single with a good bow thruster is just as maneuverable and i'd rather have a single with bow thruster or even stern thruster than twins without(around the docks).
Mrwesson is offline   Reply With Quote
Old 01-10-2019, 12:02 PM   #34
Senior Member
 
Mark P's Avatar
 
City: Hilton Head Island
Country: United States
Join Date: May 2018
Posts: 230
How diffcult or practical is it to add a “get home” engine to a single screw assuming room in engine room?
Mark P is online now   Reply With Quote
Old 01-10-2019, 12:07 PM   #35
Senior Member
 
Flybull's Avatar
 
City: USA
Country: USA
Vessel Model: 1983 Trojan F44 FBMY
Join Date: Dec 2018
Posts: 160
Quote:
Originally Posted by ranger42c View Post
I don't quite understand your complaint.

A decent search usually turns up the "personal opinion" or "preferences" many have already written -- over and over and over and over and over again, on popular and generally unchanging topics like this -- so the OP's results would be the same.

...Somebody might say something in a different way than they've said it 30 times previously, and the different wording could perhaps be useful... but that's kind of a reach.

Anyway, what do you see as the advantage of asking a commonly-asked question all over again? FWIW, I don't see it as a bad thing, just usually slow for my own purposes...

-Chris

Conversely... what "disadvantages" of re-visiting already discussed topics are there... other than your own personal "aggravation" of having to once again travel down this (now boorish, to you at least) road?

Most of us haven't been here for thousands of posts. Many of us are just lurkers or visitors here before joining. There may be a hundred lurkers for every member. This is your new member base. At this time in the history of this site, and in the boating world in general, practically EVERY topic has probably been discussed ad nauseum.

So that you and others holding the same opinion are no longer bothered with such useless topics as "Single vs. Twin"... how about we just have one Forum Topic called "New Boating Technology Only"? A message below that single Forum Topic will say...

"...For any other information... do a SEARCH, dumbass...!!!" Probably in BOLD text.

The most obvious solution... if it bothers you, don't waste nary a single key-stroke.

But if responding (over and over and over again) gives someone something to do and allows them to impart knowledge and wisdom to another who legitimately requests said knowledge and wisdom, there is literally, no harm in it.

Every third new poster, it seems around here, gets the ubiquitous "do a search in the archives... this topic horse has beaten to death... get off my lawn" response within the first ten. As a newer member, I find it rude and off-putting... but YMMV.
Flybull is offline   Reply With Quote
Old 01-10-2019, 12:16 PM   #36
Guru
 
Fish53's Avatar
 
City: Pitcairn Island
Country: yz
Join Date: Jul 2015
Posts: 689
It's seems that with modern technology there's probably room for redundant threads. If you search and pull up a ten year old thread entering the conversation with a question or comment is a bit problematic. I had this odd idea a forum was about conversation in something like real time. I still prefer single screw though, they've carried me thousands of miles.
Fish53 is offline   Reply With Quote
Old 01-10-2019, 12:25 PM   #37
Guru
 
Fish53's Avatar
 
City: Pitcairn Island
Country: yz
Join Date: Jul 2015
Posts: 689
Quote:
Originally Posted by Mark P View Post
How diffcult or practical is it to add a “get home” engine to a single screw assuming room in engine room?
I have a friend with a BHM 32 single that has a Yanmar GM20 with a 3/4" shaft and folding sailboat prop as a wing engine. I don't believe he's ever used it.
Fish53 is offline   Reply With Quote
Old 01-10-2019, 12:29 PM   #38
Guru
 
Boat's Avatar
 
City: SchoolHouse Branch
Country: USA
Join Date: Jul 2018
Posts: 616
Understand that a boat pivots around a point and pushes that point as it moves. If you keep the pivot point moving toward your destination, the boat will follow, just like you intended. Read about boat handling and pivot point.


Wind and current move you like a fly on a freight train. You can find that reference too, somewhere.


Read about how a spring line alters your pivot point, keeps you from scrubbing against the dock.
Boat is offline   Reply With Quote
Old 01-10-2019, 12:31 PM   #39
Guru
 
ranger42c's Avatar
 
City: Maryland
Country: USA
Vessel Model: 42' Sportfish
Join Date: Aug 2013
Posts: 5,271
Quote:
Originally Posted by Flybull View Post
Conversely... what "disadvantages" of re-visiting already discussed topics are there... other than your own personal "aggravation" of having to once again travel down this (now boorish, to you at least) road?

Every third new poster, it seems around here, gets the ubiquitous "do a search in the archives... this topic horse has beaten to death... get off my lawn" response within the first ten. As a newer member, I find it rude and off-putting... but YMMV.

I gave the wrong impression, apparently.

Didn't mean to suggest responding to questions is all that off-putting (you'll have seen I did reply to this question -- again -- too). And it's probably not reasonable to expect new members to automatically know what's been posted in the past, what search tools work best (and which one doesn't)...

I'm only surprised that some apparently don't want to also be directed to all the additional previous thoughts on a topic that would be available through a search.

-Chris
__________________
South River, Chesapeake Bay
ranger42c is offline   Reply With Quote
Old 01-10-2019, 12:38 PM   #40
Senior Member
 
NewbieFromNJ's Avatar
 
City: Monroe Twp
Country: United States
Vessel Name: TBD
Vessel Model: TBD
Join Date: Sep 2016
Posts: 103
Quote:
Originally Posted by ranger42c View Post
I don't quite understand your complaint.

A decent search usually turns up the "personal opinion" or "preferences" many have already written -- over and over and over and over and over again, on popular and generally unchanging topics like this -- so the OP's results would be the same.

Might be different if the query is about some kind of new/emerging technology or maybe a topic that's in flux for some other reason... but generally discussions about the pros and cons of singles/twins, anchors, and a few others, probably aren't gonna surface much if any new factoids, opinions, preferences... Somebody might say something in a different way than they've said it 30 times previously, and the different wording could perhaps be useful... but that's kind of a reach.

"Decent search" usually means using the Google or at least the Advanced versions, given the site's base search tool isn't great. And many new users don't know the base tool is so limited, so they don't always find much if that's the only tool they've tried...

Anyway, what do you see as the advantage of asking a commonly-asked question all over again? FWIW, I don't see it as a bad thing, just usually slow for my own purposes...

-Chris
Read post 29.
__________________

NewbieFromNJ is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off





All times are GMT -5. The time now is 08:56 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2020, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×