Closed bow - Page 2

Idrian · 12 October 2011, 10:15

Another example of a selfmade cabin.

http://up.picr.de/5446658.jpg

http://s1.up.picr.de/5446659.jpg

http://s2.up.picr.de/5446660.jpg

http://s4.up.picr.de/5446662.jpg

gtflash · 12 October 2011, 19:22

Scorpions have a large deck flang inside, like the inside of a bath tub. Instead of fixing to the tubes i did wonder about starting on the deck flange so the cuddy/cabin didnt rest on tubes. Then it would swoop up to console height. I worked out a cougar p1 deck would fit very well. I suppose a bit like. Few of the old fabio ribs. I'll take some pictures to help

biffer · 12 October 2011, 19:40

Our cabins don't rest on the tubes. If you let the tubes down the cabin stays where it is. It has a couple of benefits. 1 you can't rip the tubes off. 2 you can run with the tubes deflated for almost half the boat if you couple it to the engine box you can deflate the tubes altogether

sent from a remote device

Rokraider · 13 October 2011, 08:43

This is my ongoing project RIB, I am modifying the cabin to make it more usable.

Nasher · 13 October 2011, 12:33

Quote:

Originally Posted by Rokraider

This is my ongoing project RIB, I am modifying the cabin to make it more usable.

I remember looking at that boat when it was for sale at Sparkes a year or so ago.

I went to look because of the cabin and the inboard Diesel, but decided to stick with my Ocean instead.

Good to see somebody took it on, as I remember the cabin was 'crawl in' height, and I thought about cutting the deck out inside it to get some extra space.

Nasher.

Rokraider · 13 October 2011, 18:28

I Have totally gutted it and am extending the top upwards enough to enable me to sit with my legs flat on the floor and have reasonable headroom. I have rebuilt a Castoldi jet thats going on the back and a 275 bhp BMW 3.0 TDi to shove it along.

captnjack · 13 October 2011, 19:21

Quote:

Originally Posted by Rokraider

I Have totally gutted it and am extending the top upwards enough to enable me to sit with my legs flat on the floor and have reasonable headroom. I have rebuilt a Castoldi jet thats going on the back and a 275 bhp BMW 3.0 TDi to shove it along.

That engine space is enormous! How long and heavy is she? A 275hp diesel seems like alot of power.

Louise · 13 October 2011, 21:44

A lovely guy from the Netherlands (I think he posted on here as MarkM but haven't seen anything from him for a while) has/had a Scorpion with a closed bow. I think he modified it himself. I think he did use it for sleeping in. I'll see if I can find a piccie to post.

Louise · 13 October 2011, 21:47

Here's a piccie of Mark's boat. He brought it to Ribex one year by sea.

Click image for larger version

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willk · 13 October 2011, 22:07

Quote:

Originally Posted by Louise

I think he posted on here as MarkM but haven't seen anything from him for a while

You either, a year to the day in fact.

Louise · 13 October 2011, 22:10

Oooo, is it really exactly a year?! How spooky! Life just gets in the way sometimes!

Rokraider · 13 October 2011, 23:36

The engine box is huge, but For what I intend to use it for, it is not a problem. I did look at making a box that just covered the engine and would allow access to the stern down each side, but the engine is designed to sit slightly pissed which actualyl makes it quite wide, not leaving a sensible walkway down the side. I want to have storage at the rear and will be mounting a sampson post on the front of the bulkhead (suitably re enforced) which will give me a clean 180 degree sweep over the top of the engine cover with a stainless frame at the edges for the rope to slide over. The entire engine lid will be covered in foam rubber and will be an area to put a dinghy across or a Moth etc. It will also be a film platform to work from. I will not be using an A frame at the rear, everything will be kept as low as possible.
I will run a frame over the front bulkhead for nav lights, aerials and flags etc.

The BMW is an exquisite engine with no fat on it at all. It is probably physically smaller than the 4 cylinder Yanmar it is replacing and will be lighter even though it has 2 extra pistons for the same cc's. It also has another 50 HP.

I am considering using a conventional radiator and cooling fans to cool the engine and intercooler, rather than using a sea water / heat exchanger system. It will spend quite a bit of time in shallows and we get quite a lot of seaweed in Chi Harbour. Blockages are a common problem with several engines getting cooked when the seawater system gets blocked with seaweed. I have successfully cooled off road vehicles with similar power and a radiator in the rear with little airflow, I don't see why I can't do the same on the RIB?

In the pictures you will notice I have made the bottom of the keel into a second fuel tank. It has been totally re glassed and gelcoated (not shown) with a lid sealed on and another layer of class still to be applied. The hull is at its deepest where the bow stops approx 1/3 rd of the way back from the front. My plan is to use the bottom tank as extra fuel and ballast to trim the ride using a transfer pump to move the fuel from top to bottom and back. This system will give me a approx 270 litres of fuel. I don't know whether this will work, only one way to find out.

I am building it when I have time and spare cash and hope to finish it in time for the spring.

captnjack · 14 October 2011, 06:02

Thanks for the pictures

Not sure about air cooling a diesel that large. Its going to take alot of air for combustion, maybe you can suck that air across the radiator? Although hot air is a bit less dense than cool and she might run a bit rich that way. I don't really know electronic ignition diesels, the electronics will probably compensate.

Alternatively you can get intake seachests with marcerator pumps at the screen to chew up detritus. I think Jabsco makes one.

MarkM · 17 October 2011, 10:01

Quote:

Originally Posted by Louise

A lovely guy from the Netherlands (I think he posted on here as MarkM but haven't seen anything from him for a while) has/had a Scorpion with a closed bow. I think he modified it himself. I think he did use it for sleeping in. I'll see if I can find a piccie to post.

Hello Louise how are you and the family? Do you still own Blue Ice?
No I didn't make the closed bow myself, was specially made by Scorpion.
Yes we sleep in the Scorpion and make many long journeys with her.
Did many modifications to the RIB since we met in 2005. New engine, powerlift, new instruments, etc.