One question of outboard engine

Had anybody known there was a ship or boat that applied outboard engine at inboard side, which means it applied outboard engine at front of stern or transom like a POD or inboard engine.

I'm very sorry for this ridiculous idea, but my boss insisted on this. I have not found any document to let him give it up

 

Sure. Look at the Nina.

https://www.boatbuildercentral.com/StudyPlans/LB22_STUDY.pdf

it’ll never plane is all

 

Welcom to the forums
Sure, all the time down east in the Carolinas in skiffs, yawl, and net boats. Look at the Simmons Sea Skiff.
The Simmons Sea Skiff - Small Boats Magazine https://smallboatsmonthly.com/article/the-simmons-sea-skiff/

 

Thank you for you reply. one more question follows, will CE or other class certification allow this design?

 

Thank you for you reply. one more question follows, will CE or other class certification allow this design?

 

Yes, there are more than a few trailer-sailer type yachts with CE certification, that have "inboard" outboard-motor wells.

 

Take a look at Francois Vivier designs. François Vivier Architecte Naval – Boat plans to make the sea more beautiful https://www.vivierboats.com/en/
All to CE certfication.

 

Hi ..
there are also some sailing boats using more or less the same concept. Checkout the following:

• Seascape 27
• Saphire 27
• Reacher 780

Best regards ...

 

many thanks, design like this is totally new for me. it is grand help

 

Hi, thanks for your reply,
I think it is much easier for monohulls of design category C &D . I got one 40ft sailing catamaran, and primarily used Volvo D1-30 with sail drive as inboard engine. However it could not meet requirements for exhaust emissions standards in my country. If you have any news about type like this, please help me and known. Thank you

 

@Hiro Chen what is the actual purpose of your question? Is it a general conceptual thing or related to a specific design?

And I don't get the point why the engine or propulsion concept effects the CE Design Category, which covers stability and seaworthiness. Yes, the engine it self must comply to some emission regulatories, etc.

You wrote that you want to convince your boss not to use such a concept, but it also has some advantages.

For example it is way lighter than a inboard diesel engine with the same power output.

The Seascape 27 is constructed in a way that you can take out the engine, with a folding mechanism, during sailing to reduce the drag.

The engine might be more easy to maintain by a better accessebility.

Once there was an outboard engine converted to an saildrive on the market, but I guess it is not available anymore, unfortunately. You can Google for "Saildrive 330".

 

For me, the main reason I don’t like these designs is my uncertainty about what happens to fumes; especially at idle. I’d not want CO emissions inside my boat.

 

In most cases the outboards are mounted in open cockpits. In some cases, like the old British Hunter yachts, the engines were in vented cockpit lockers, behind a sealed bulkhead from the accomodation.

 

Oh, I understand all of that; even tunnels under and the like, but I still don’t like them for that reason.

 

I would say the risk is as about as much as sitting inside an idling car, unless you are running an old 30-1 mix 2 stroke Seagull, they can make your eyes smart till under way to clear the smog.