Topic: Damen AXE Bow concept (40 metre Patrol boat) (Read 12606 times)

nick_75au · « **on:** January 22, 2011, 08:39:40 am »

Hi,
Not quite sure on where to post this one

I've started on the hull of this unusual vessel.

Cheers
Nick

pugwash · « **Reply #1 on:** January 22, 2011, 09:52:26 am »

Well give us a clue - what is it going to be
Geoff

RaaArtyGunner · « **Reply #2 on:** January 22, 2011, 10:02:27 am »

Looks like a Model boat

nick_75au · « **Reply #3 on:** January 22, 2011, 10:24:43 am »

Not Yet it don't

I should have it skinned in a few more days then we will see.

Nick

Netleyned · « **Reply #4 on:** January 22, 2011, 10:27:22 am »

Turbinia?

Ned

nhp651 · « **Reply #5 on:** January 22, 2011, 10:29:41 am »

wrong shape bow for Turbinia

oldiron · « **Reply #6 on:** January 22, 2011, 10:31:50 am »

How about that new three hull naval vessel. This being the center hull.

John

DavieTait · « **Reply #7 on:** January 22, 2011, 10:44:01 am »

AXE-Bow concept , pretty weird looking ship must admit

http://www.uscg.mil/acquisition/sentinel/

gondolier88 · « **Reply #8 on:** January 22, 2011, 11:33:26 am »

Apart from the superstructure that looks like a pretty standard LDL (low displacement length) hull, most small and medium displacement hull manufacturers are using them these days, but the largest one is around 200ft if I remember correct.

Greg

nick_75au · « **Reply #9 on:** January 22, 2011, 11:46:45 am »

DavieTait wins the prize

I have some images of a slightly different version of that pic, their haven't as far as I'm aware been any military full size versions built, so this is going to be a semi scale boat.

Nick

DavieTait · « **Reply #10 on:** January 22, 2011, 03:32:53 pm »

Damen shipyards are already building oil rig supply vessels to this design

Sea Axe 5009 IV ( won ship of the year 2009 )

Bryan Young · « **Reply #11 on:** January 22, 2011, 04:48:22 pm »

This vertical or near vertical bow intrigues me a little. Are ship designers kind of acknowledging that the shipbuilders of the early 20th century "got it right"? Or is it (perhaps) yet another example of some crew comfort being sacrificed in the name of hydrodynamic efficiency? Possibly OK for a warship where crew and cargo comfort was never a consideration, but having a flared bow area certainly reduces deck cargo weather damage.
It also appears to me of little brain that this sort of bow is solely concerned with the hull slicing into a head sea. But in reality, butting into a head sea is not the "norm"....your'e just as likely to be rolling the ships guts out in a beam sea.
So why is this "style" now the flavour of the month? BY.

Shipmate60 · « **Reply #12 on:** January 22, 2011, 05:48:02 pm »

Bryan,
The theory is that the bow cuts through the sea like an axe, (hence the name), and reduces pitching and the resultant forces on the hull and crew.
Serco Marine have one of these based in Greenock the SD Eva.

Bob

Aeronut4 · « **Reply #13 on:** January 22, 2011, 06:11:01 pm »

Looks to me like they've been scaling up Glyn Guest's warships!

Bryan Young · « **Reply #14 on:** January 22, 2011, 06:51:01 pm »

Quote from: shipmate60 on January 22, 2011, 05:48:02 pm

Bryan,
The theory is that the bow cuts through the sea like an axe, (hence the name), and reduces pitching and the resultant forces on the hull and crew.
Serco Marine have one of these based in Greenock the SD Eva.

Bob

Pitching is more to do with a ships length and the periods of the waves than a hull form. No matter how well a hull "slices" through the water her buoyancy will cause the hull to rise and fall. If the "side" of a wave is as long as the ships hull then the hull will adjust to the angle of the wave. What happens when the hull topples off the wave top and into the trough is a matter for conjecture. A ship with a good "flare" will resist burying itself into the next wave. Not always successfully. But at least it wouldn't try to morph into a submarine. Personally, I'd rather remain on top of the water rather than being submerged under it. I had one experience of that you. Never again. BY

nick_75au · « **Reply #15 on:** January 23, 2011, 03:37:10 am »

It apparently aids crew comfort rather than sacrificing it, by reducing the slamming in the same way as the Ulstein X-Bow, fuel savings as well.

Courtesy of Umi

not quite a GG hull

Nick

http://www.rcgroups.com/forums/attachment.php?attachmentid=3742499

nick_75au · « **Reply #16 on:** January 23, 2011, 04:27:54 am »

I have sheeted the bottom, there's a hint of a ship there now

there's a quick and dirty layer of epoxy bog to fill in a couple of hollows, only problem is the micro balloons are lumpy from the tin, I don't know how to fix that?

Nick

nick_75au · « **Reply #17 on:** January 23, 2011, 07:46:10 am »

2x #SK-2836-750/7872 TGY AerodriveXp SK Series 28-36 750Kv / 262W = $30.74
2x #HK-30A/11742 HobbyKing Brushless Car ESC 30A w/ Reverse = $29.98
2x #HD-3001HB/9621 Power HD Standard Servo 43g/3.5kg/.15sec = $11.18

will be the gear going in, 2 Darke Horse custom shafts with 35-40 mm props

Nick

nick_75au · « **Reply #18 on:** January 26, 2011, 07:47:21 am »

Bit more progress, a little more fairing got a Graupner thruster on order and 2 type C Raboesh 5 blade props,

Any weapons experts know a gun I could model for the bow, Auto 20-30 mm I guess

Cheers
Nick

nick_75au · « **Reply #19 on:** January 28, 2011, 07:37:23 am »

Mr Moderator,

is it possible to change the title of the thread to

Damen AXE Bow concept (40 metre Patrol boat)

and then delete this post.

the catchy title has run its course

Thanks
Nick

Martin (Admin) · « **Reply #20 on:** January 28, 2011, 07:59:48 am »

pugwash · « **Reply #21 on:** January 28, 2011, 08:27:54 am »

Nick a lot of smaller ships are bieng fitting with the Bofors 57 mm as main gun armament.
Geoff

nick_75au · « **Reply #22 on:** January 28, 2011, 09:22:11 am »

Thank you Martin

Geoff, still looking Aselsan stamp is looking good , If I can get some 3 View drawings of it

Started Fibre glassing the hull with Epoxy and cloth, using Boat Cote epoxy thinned with about 20 % acetone.

Nick

nick_75au · « **Reply #23 on:** January 28, 2011, 11:11:30 am »

Only the other side to go

Nick

hama · « **Reply #24 on:** January 28, 2011, 11:25:30 am »

Interesting boat!Looks good so far. I believe I've seen a build of a axe-bow here before, someone in Holland or Denmark? Can't find it now but I'll keep searching.
Keep up the good work!
Hama

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Author Topic: Damen AXE Bow concept (40 metre Patrol boat) (Read 12606 times)

nick_75au

pugwash

RaaArtyGunner

nick_75au

nhp651

nick_75au

Aeronut4

nick_75au

nick_75au

nick_75au

nick_75au

nick_75au

pugwash

nick_75au

nick_75au

hama