ACME stern thruster

tyce

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Talk some sense in to me please.

My boat is of the twin rudder variety 35foot lift keel.
She handles lovely when having a bit of weigh on but I really miss the use of prop thrust when tight manoeuvring and she has a good walk to port when astern until she gets moving which is great if you want to go that way not if you don't.
I can deal with this 9 times out of 10 but there has been the odd occasion that a tight marina has been very busy and I struggled to get in and even harder to get out.
A few of this type of boat have gone the bow thruster route which I don't mind doing also but as I use a mooring and only do marina manoeuvring occasionally I did not want to be stuck with two big holes in the bow causing drag not to mention the hassle and cost of fitting.
Soooo what I was thinking is buy something like a Torqeedo electric outboard 1kw or if I found a cheap second hand one 2kw and put it on the back of the boat.
The layout of my transom is such that I could easily fit a removable bracket with no holes drilled in the boat and seconds to fit the clamp.
The key bit is I don't want to be trying to control an outboard whilst juggling the helm but I was thinking lock the engine of sideways and they come with remote controls so the control velcroed to helm position and then I can select forward and reverse.
I know this won't be as good as a bow thruster but as said it'd only be occasional use.
Has anyone seen something similar, I have read a few posts on other forums which basically confirms I am mad as there will not be enough thrust but I'm not so sure, my little 2hp outboard on my dinghy if the dinghy is tied across the stern whizzes the boat round not even near full throttle.
Its only a 35foot boat and its only to help whilst I get her moving or in very slow manoeuvring situations.
What do you reckon?
 
I had a transom mounted outboard on my Jaguar 23 (no inboard engine). The fact that outboard could be rotated a full 180 degrees port to starboard made manoeuvring supremely easy. That said it was an 8hp motor on a 23ft boat. I don't think your idea is a bad one, but reckon you would need a fairly 'oomphy' motor to move boat sideways at a useful pace.
 
This year I saw a chap with a long keel, maybe 35footer, with an outboard mounted on a removable bracket on the stem. He did not use it as he came in but it was there ready to go.

I think your set up could work. The ultimate luxury would be a sliding bracket of some sort where the motor could be stored, above the water, and slid down to operate.
Of course you would still face the dilemma of judging the conditions where the limited thrust would prove ineffective. Which is, sort of, the position you are at now.
 
Problem with the side power unit as far as I can see is-

1. Cost
2. Big ugly lump under the boat that slows it down.
3. if I ever hit anything with it particularly if bow mount I would imagine it could be ripped clean off which would be rather disastrous with a 2" hole remaining.
So I ruled them out on the above.
As regards thrust that's my concern but the electric outboard are all about thrust rather tan speed if the marketing blurb is to be believed.
I was thinking about picking up an 100lb thrust trolling motor to try the theory they go second hand for not a lot of money and would come in handy on my dinghy if it does not work.
Total cost should only be £150 so not the end of the world.
 
Doug,

I have a cunning plan for similar set up, I do not want any changes to the boat and the bracket I have in mind would be fitted in seconds and stored with the electric engine in the cockpit locker.
Alright I will look a bit of a chump when its attached but I don't really care about that and It will rarely be used anyway. Like I say 9 times out off 10 its not an issue just the odd occasion.
Prioritys are an easy fit, effective and non permanent like a bow thruster. And I don't have to carry round an extra outboard for the dinghy as this would double up for that duty.
I think if I was using it to get in and out of my marina berth every time I went out then I would definitely go the bow thruster route but for my usage a bow thruster seems excessive.
 
PVB,
They do both stern and bow, I think if I was doing it properly and paying decent money I would go for the bow mount option for my boat.
I would rather go the tunnel route though than an external lobby but can see the advantages.
 
A different thought. Is it possible to rig a transom mounted centre rudder that you can drop in place when you need to get some sideways thrust from the engine?
 
PVB,
They do both stern and bow, I think if I was doing it properly and paying decent money I would go for the bow mount option for my boat.
I would rather go the tunnel route though than an external lobby but can see the advantages.

I only suggested it as you were looking for a stern thruster, and the EX works well in that mode. If you'd asked about a bow thruster I'd have suggested a Side-Power tunnel thruster.
 
Norman,
Yes thought about that one but cant really think of a decent design that would take the forces involved without major surgery on the transom so ruled it out.
It would have been a good solution though.
 
Amused by this as I had a mad idea for when I win a triple rollover (unlikely, as I haven't bought a ticket for years :cool:) to work with Southerly, as I've always like the concept of their boats, to replace some of the weight of the grounding shoe with batteries, fit a generator instead of an engine, and powering the boat with a mini Azipod ahead of each rudder. Add a retractable bow thruster, and easy parking in any conditions I'm likely to be out in. Also easy to get off when wind & tide decide they don't want you to.
 
Hanse have already come up with similar to this, they have a Torqeedo mounted in the rudder, makes them very easy stop turn.
 
Hanse have already come up with similar to this, they have a Torqeedo mounted in the rudder, makes them very easy stop turn.

Sadly, Hanse's e-motion drive hasn't been a great success. Even in the Hanse 315, it's fairly slow and has minimal range. Plus it's very expensive - around a £12K option at minimum spec, and buying that option means you don't get the diesel engine otherwise fitted as standard, so the real cost is maybe double. Certainly not an alternative to a stern thruster.
 
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