Topic: Bourbon Orca : not just a project... (Read 14150 times)

midori gaoka · « **on:** December 12, 2021, 08:23:30 pm »

Hello,
Few month after completing the "HMS Blyth" at 1/100 scale, I wondered which original project I could started. Walking on Cherbourg's quay, the choice was made: an original green hull: Bourbon Orca. In a 2020 July afternoon, I was able to get on board and took photos as much as I needed. Special thanks to the captain and crews who let me visiting anywhere.120 photos taken, were not the major challenge....How to get plans ?

Umi_Ryuzuki · « **Reply #1 on:** December 12, 2021, 10:09:12 pm »

Could purchase a kit.

https://barracudarcboats.mysimplestore.com/t/x-bow-tug-boats

steve mahoney · « **Reply #2 on:** December 12, 2021, 11:36:21 pm »

PM sent.

midori gaoka · « **Reply #3 on:** December 15, 2021, 08:55:10 pm »

Hello,
So I 've decided to make this project by my own as far as I can. I've contacted the "bourbon" relationship company, and explained what I would do with plans.
Few weeks later, I ve received the general arragement and 7 copies of bridges but not the lines drawing. I've superimposed the bridges and got 7 points that I linked.I' ve used a curve ruler to linked the points.

derekwarner · « **Reply #4 on:** December 16, 2021, 01:02:31 am »

Good to see traditional Lofting

.....but I am a bit lost

During some very rudimentary training many years ago [from an ex Loftsman employed by the Whyalla Ship Yards] was to keep all progressions equal ......[in those days Feet and fractions of Feet + Inches], however my training being for a model ship was using mm

We see you have a Datum 0.000 [assumed as cm]...then position 1.5 cm....then position 5.6 cm....then position 8.5 cm [Deck Levels above 0.0]

The issue here, without using equal progressions is that the human eye has greater difficulty in understanding the uniformity of the shape, and hence inaccuracy in the flow of the individual waterline

Do you have End Elevation views?....if so, equal progressions can be achieved, the lines are for hull profile, irrespective of deck level

So if you have chosen 1.5 [cm], then an equal progression would be 3.0, 4.5, 6.0 cm etc......[although the use of cm can be confusing

]

In general engineering design protocols for machinery components for Metric units is hard mm........ 152mm, 1527mm or 20157mm

It is not too late, if you try equal progressions you will not be disappointed [and certainly less frustrated with the result]

Derek

chipchase · « **Reply #5 on:** December 16, 2021, 08:50:23 am »

Good luck with your build, this was my attempt with an X-Bow. I was quite pleased with the result

midori gaoka · « **Reply #6 on:** December 16, 2021, 09:25:37 pm »

Hellom
You should be proud of the result.
Bon travail

ballastanksian · « **Reply #7 on:** December 16, 2021, 10:30:31 pm »

I remember you working away on that from buck to finished hull Chipchase. It was an interesting read as I am sure your build will be Midori!

Looking forward to more.

midori gaoka · « **Reply #8 on:** December 19, 2021, 09:16:17 pm »

Hello,
To answer at your question, I 've the end elevation. I watched many photos about the "Bourbon Orca" in dry dock. To compare with my drawing, Her shape does not look so bad. But I can't be sure. So it's time to cut frames. As you can see, in the middle, hull is flat but very thin in front

midori gaoka · « **Reply #9 on:** December 24, 2021, 06:04:02 pm »

Hello every body,
And first I wish you a merry christmas.
The keel appears quite massive at the front. the thruster's diameter looks large. The keel was cut in 8 mm plywood

midori gaoka · « **Reply #10 on:** January 07, 2022, 10:02:39 pm »

Hello everybody,
At first an happy new year with few modelboat project.
It was necessary to make a work plan with a floor, and check after that if bottom of frames are on the same plan.

chipchase · « **Reply #11 on:** January 08, 2022, 08:14:56 am »

Starting to take shape

midori gaoka · « **Reply #12 on:** January 10, 2022, 09:48:12 pm »

Hello,
As you said , it takes shape. So, now, Keel is nested in frames. As you can see, at bottom of frames, there are some holes. They are used to pass electric wires.

midori gaoka · « **Reply #13 on:** January 15, 2022, 09:22:29 pm »

Hello ,
The keel is laid.On each side of the hull, there is a plywood board. It's flat and do not need to follow a curve. there are several slats with different widths. They are glued with 5 min glue. I staple them to flattem them well. Few minutes later, I take them off.

mrzippy · « **Reply #14 on:** January 16, 2022, 04:03:15 pm »

Hi Midori,
Nice start to an interesting project ! what is the overall length of the hull please?
Paul.

midori gaoka · « **Reply #15 on:** January 21, 2022, 08:15:59 pm »

Hello,
So the length of the hull is 86 cm but its beam is 18 cm long which is a large size at this scale.
In the same time, I 've completed the hull, I've prepared the mechanism of propulsion. The 2 large gears allow the 360° pods rotation.

midori gaoka · « **Reply #16 on:** January 28, 2022, 10:11:21 pm »

Hello,
Let's talk about pods. It's clear that it's hard to find this kind of thruster with the scale you are looking for. I did not have a lathe , so without, you can just forget to create nozzle or gear. So , a call and a copy of plan to my brother Guillaume, and thruster start. On a photo, you ll be able to see that propellers are curved in a brass block. They are not completed yet

midori gaoka · « **Reply #17 on:** February 05, 2022, 07:43:38 pm »

Hello,
So this is the end of the assembli of the pods. I 've put marine grease on gear before closing bulb. As you ll be able to see propellers are completed

hama · « **Reply #18 on:** February 06, 2022, 10:05:27 am »

Wow, nice pods!
Love to watch your builds

Hama

SteamboatPhil · « **Reply #19 on:** February 07, 2022, 08:48:53 pm »

Really nice work

midori gaoka · « **Reply #20 on:** February 12, 2022, 05:52:48 am »

Hello,
And at first, thank you for your comments, it shows me that I 'm on the good way for the Bourbon Orca. I'm sorry for the poor quality of photos, but my mobile phone as failed and my camera lens is broken. So, on the first photo, I've added a bow thruster tube. Diameter is big enough, 27 mm. Putty is applied around. On the second one, I've used plasticard sheet to complete the top of the hull. There are many cutting to do.

midori gaoka · « **Reply #21 on:** February 14, 2022, 08:43:54 pm »

Hello,
So now, both side on the top of hull, have been added. It's the last step before fiber glass and resine.

midori gaoka · « **Reply #22 on:** February 20, 2022, 08:04:40 am »

Hello,
So ,the hull looks well good and it is time to strengh the hull. On first photo, I 've applied epoxy resin with a paint brush. And then ,a square of fiber resin has been laid on. With the same paint brus, I pushed out bair bubbles. On the second one, I had waited 1 day to cut the excess of fiber glass.

midori gaoka · « **Reply #23 on:** February 26, 2022, 06:47:30 pm »

Hello dear modellers,
I've forget to send photos about the pods construction .On the first one, you can see template to place the nozzle. For the last one, few holes have been made on the main gear, this made it possible to make the right adjustment for pod rotation

midori gaoka · « **Reply #24 on:** March 05, 2022, 08:59:07 am »

Hello everybody,

It's a part of the "apron" (I hope the translation from french to english is good). On real boat, this part can move to touch water in order to facilitate the anchor's lifting .
I took many photos to represent rust of rear boat. On last photo, I will be able to see that right sid of apron need to be enlarged

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