RE: Aston Martin's powerboat

[Agent XXX]

Mmmmmmmmmmmmmmmm

[SlimRick]

Not the prettiest boat in my opinion, and reminded me of this:

[ChemicalChaos]

soad said:

cuda said:

I have to ask. How much?!

I heard £1.3m (if accurate)?
http://www.cityam.com/250265/want-more-like-james-...


At least (Rolls Royce) Aeroboat is propelled by a reconditioned, waterproofed 27-litre Rolls-Royce Merlin V12 engine.

It will most likely be a Meteor tank engine, far more practical.
There was also a diesel marine version of the Meteorite V8 out of the Antar

[dvs_dave]

Krikkit said:

SuperchargedVR6 said:

I don't really understand boats, other than they float, but 1000hp to reach 57mph?!

Nice looking thing!

Water is quite a thick fluid to push a big blob like a boat through...

Indeed. And boats laugh in the face of double digit mpg figures as a result.

But I can assure you that 50+mph on a boat is every bit as exciting and intense as 150+mph in a car. Throw in some light chop and you have pretty wild and unruly beast on your hands. Fast boats are a lot of fun as it's rare that you have speed limits to worry about outside of the harbor. But they demand a lot of respect as it can go wrong very quickly if you're not careful or don't know what you're doing.
http://youtu.be/dE-nfzcUiPk
Ouch!

[SuperchargedVR6]

dvs_dave said:

Krikkit said:

SuperchargedVR6 said:

I don't really understand boats, other than they float, but 1000hp to reach 57mph?!

Nice looking thing!

Water is quite a thick fluid to push a big blob like a boat through...

Indeed. And boats laugh in the face of double digit mpg figures as a result.

But I can assure you that 50+mph on a boat is every bit as exciting and intense as 150+mph in a car. Throw in some light chop and you have pretty wild and unruly beast on your hands. Fast boats are a lot of fun as it's rare that you have speed limits to worry about outside of the harbor. But they demand a lot of respect as it can go wrong very quickly if you're not careful or don't know what you're doing.
http://youtu.be/dE-nfzcUiPk
Ouch!

Christ! Ouch indeed! The way the 'driver'(or pilot/captain/skipper?), flops over like a sack of spuds like that is mental! Water clearly has substance at speed!

Every day is school day so I did a bit of looking into fast boats and the Spirit of Australia seems to the be the fastest, at 317mph!!

Do marine engines differ much from land engines? Do they take coolant directly from the sea, so no radiators?

[daveco]

So this is essentially similar to their Aston Martin Cygnet marketing ploy?

Aston Martin skin on much cheaper underpinnings, but with an AM type price?

[ChemicalChaos]

SuperchargedVR6 said:

Do marine engines differ much from land engines? Do they take coolant directly from the sea, so no radiators?

I'm not an expert, but as far as I know the main difference is tuning.
A land engine is tuned for a wide powerband at a variety of revs. A marine engine is set up to spend long periods at constant medium revs.
As for cooling, the engines aren't cooled directly by the water the boat is on, probably for corrosion reasons, but there is an engine water:raw water heat exchanger rather than the air cooled radiator of a land engine.

[soad]

Nanook said:

ChemicalChaos said:

It will most likely be a Meteor tank engine, far more practical.
There was also a diesel marine version of the Meteorite V8 out of the Antar

It'll most likely be a Merlin engine, the Meteor was a boat anchor (fittingly) that spun the other way. You'll not be wanting to squeeze 1100bhp or more out of the cast pistons I'd imagine!

"The supercharged Merlin V12 engine with its bespoke gearbox and final drive can be specified in various states of tune from 1500hp up to 2500hp giving rise to speeds in excess of an astonishing 75 knots."
http://www.claydonreeves.com/portfolio-item/aerobo...

[dvs_dave]

ChemicalChaos said:

SuperchargedVR6 said:

Do marine engines differ much from land engines? Do they take coolant directly from the sea, so no radiators?

I'm not an expert, but as far as I know the main difference is tuning.
A land engine is tuned for a wide powerband at a variety of revs. A marine engine is set up to spend long periods at constant medium revs.
As for cooling, the engines aren't cooled directly by the water the boat is on, probably for corrosion reasons, but there is an engine water:raw water heat exchanger rather than the air cooled radiator of a land engine.

Unlike automotive engines, they are tuned to run at constant speeds for prolonged periods at high loads and power outputs. This means they need to have significantly beefed up cooling, lubrication and fueling systems. They also have beefed up head gaskets to cope with this higher duty level.

Many marine engines (particularly outboards and older inboards) do use raw water directly in the water jacket for cooling as it's cheap, simple, and space efficient. Although most these days use a coolant to raw water heat exchanger as its more durable.