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Author Topic: US Coast Guard 45 RBm (Graupner Pilot Boat)  (Read 28537 times)

Umi_Ryuzuki

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US Coast Guard 45 RBm (Graupner Pilot Boat)
« on: February 16, 2018, 07:57:43 am »

I started this a while back, and have been pecking away at it.
Probably the first kit I have built in 17 years. But it was on sale, free shipping, and I accidentally purchase one.  %)

It's a great kit, blow molded one piece hull and deck and Pilot house roof, and CNC pilot house walls and railings, a resin cast mast.
When I opened the box everything was great, even a set a plans,... but no instructions.
Ah well, I wasn't intending to follow any plans or instructions in the first place, but it would have been nice to
know where they had intended people to to start construction.

So the first thing I decided to do was sand away the top hatch, and open up two windows on either side of the roof.
I cemented a styrene patch to the interior indentation to make sure I didn't sand through the material and open up a new hole.

The bow was the next modification. The Pilot boat has a raised wave break, and the CG45 has a flush deck.
The hull is pretty thick, but a few strikes with a heavy duty Olfa snap blade, and the wave break parted from the deck.
The hull is ABS, or something, it weld pretty nicely with styrene. So I pushed an oversized patch into place from the inside, and
chemically welded that into place. Once that had cured, I placed a filler patch into the cut to flush out the deck. Then filled and
sanded that till the deck faired out smooth.

Umi_Ryuzuki

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #1 on: February 16, 2018, 08:35:20 am »

After getting the hull back in shape there were also two hatches I needed to add, so I commissioned
Alex, at Barracuda Boats USA to CAD me up some hatches. While he was doing that, I started assembling the pilot house.
The parts are all CNC cut, so it was simply cutting the tabs, and a bit of folding to assemble the parts.
I used a 123 block to help square things up. Things were going so well, I didn't notice that the forward part of
the CG45 had some extra bevel cuts to the forward corners, and a slightly different panel assembly.
I decided to push forward as is rather than cut it apart and get full accuracy.

I did however rebuild the area at the back around the door. The CG45 has a bit more head room back there, so I
raised the sidewalls around the door, and cut the back of the roof piece to create a taller opening.
I cut the window frames clear of their sheet, and sanded each of the outer faces with 350 grit sandpaper.
I then applied dots of Extra thick CA cement to make up the rivets. Placing a couple of drops of kicker on the face of
the frames, and wiping it across the surface and away prevents the cement from spreading out, and keeps the  round rivet head tall.

The CNC parts fit together nicely.  :-)

.

Umi_Ryuzuki

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #2 on: February 16, 2018, 08:44:43 am »

I then set to reworking the back of the pilot house.
The door and air intakes are just a bit different, so I set to making things right.
I built up a vent, and molded and cast up a pair. Then made up a left hinged door to match the photo.
Of course someone saw the door, and wanted a pair... so I made a pair. So as not to make it too
awkward, I matched the window base line to either side of the door.  O0

I also added the tank and fresh air vents to the either side.
 

Umi_Ryuzuki

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #3 on: February 16, 2018, 08:54:03 am »

The hatches came in, so  I got those molded and cast and then added them to
the bow and center of the engine hatch at the back. I also created the lazerette for the stern of the boat.
The core of the lazzerette was designed to be screwed down to the deck and if necessary tow off of the bitt.
I also created a new base for the mast, I designed it to hold a servo for powering the radar.

Xtian29

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #4 on: February 16, 2018, 09:13:56 am »

Hello Aimée


Very nice job, I will follow this topic with attention


I also "accidentally" bought one   {-)    My project is to built it as yellow dutch pilot boat.


Xtian
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morley bill 1

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #5 on: February 16, 2018, 09:58:37 am »

Hello if your looking for graupner instructions they can be found on a pdf file on the internet I got the Bernhard Gruben before Christmas and it came without instructions which after spending £563 pounds I thought was pretty rubbish also they were not for the mark II that is now being sold but you may be lucky with the jet boat just try a google search as I did hope this helps   Bill....
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Charlie

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #6 on: February 16, 2018, 05:17:55 pm »

Very nice, will be following your build.


Charlie

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #7 on: February 17, 2018, 07:13:03 pm »

 Dito O0
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spongie

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #8 on: February 19, 2018, 01:13:32 pm »

Nice to see some more worldwide builds, I love seeing all the RNLI builds but its nice to have some variety! :)
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Umi_Ryuzuki

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #9 on: February 19, 2018, 07:34:40 pm »

Thank you to everyone, and sorry if this gets stalled, or has a few hiccups as I get time to work on this.

The railings are a nice sheet of CNC cut styrene.
However, as they are cut from flat stock the railings are, well, flat, and for a Pilot boat.
So I set about building up railings, for the Coast Guard version

Umi_Ryuzuki

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #10 on: February 23, 2018, 10:50:02 pm »

The railings on the bow, and the hatch that was added.

 :-)

Umi_Ryuzuki

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #11 on: March 07, 2018, 05:20:19 am »

Trying to fit the drives, I didn't quite open up the jet holes wide enough.
Pressing the drive into one of the holes, I caused a hairline crack t the base of the transom.
I welded the crack with some plastic weld, and then added some square bits of styrene inside to reinforce the bottom corner.
Then back filled it a bit with epoxy.  The blow molding is a bit thin all the way across that area.

I added a reinforcing piece to the forward railings, and the small vent tube.
In reality, I was trying to avoid masking and painting the non-skid on the deck. %)

Dreadnought

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #12 on: March 07, 2018, 02:48:01 pm »

Looking good Umi  :-)) :-))
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Umi_Ryuzuki

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #13 on: March 14, 2018, 05:21:06 am »

Some more bits done... to  avoid masking and painting the deck.  %)

chipchase

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #14 on: March 14, 2018, 07:52:45 am »

Great job  i think your detail work is spot on :-))

ballastanksian

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #15 on: March 14, 2018, 10:10:35 pm »

The hatches and brass work is excellent Umi! I like the new bits you are doing as well such as the mast mounting (I would call it a Tabernacle, but it isn't that shape!)
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Umi_Ryuzuki

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #16 on: March 17, 2018, 06:16:44 pm »

Thanks, for the compliments.

So after a tortuous amount of delay, and thought on masking, I dug out a roll of airbrush frisket.
It is a light tack vinyl sheet with a frosted finish. I cut a bit to fit the bow, and tacked it onto the deck.
I then drew out the non-skid pattern, and cut and picked out the areas where it was to be painted.
I had done some experiments with paint and sand, and finally sleuthed out Rustoleum Fine Textured spray paint for the finish.

Once I had sprayed down and let dry a bit of the original metallic base coat, I laid in two and a bit coats of the black textured paint.
... worst thing, ... that moment when you remove the masking and find you forgot to pick one of the paint areas.  {:-{

I let everything cure up, and then came back and remasked for just one non-skid plate, and finished up the bow.

Neil

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #17 on: March 17, 2018, 06:31:41 pm »

i have used that Rustoleum textured on  3 of my models Umi, and as you say it is brilliant stuff. you just have to remember NOT  to touch it for a good few hours of curing...........your model looks superb and superb masking as well.


could i ask you what "airbrush frisket" is.............a masking tape perhaps.
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Umi_Ryuzuki

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #18 on: March 17, 2018, 07:09:01 pm »

I use it now and then, and forget I have it often...  %)
It's actually called Frisket Film.

https://www.amazon.co.uk/frisket-film/s?ie=UTF8&page=1&rh=i%3Aaps%2Ck%3Afrisket%20film

Umi_Ryuzuki

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #19 on: March 18, 2018, 04:58:53 pm »

The back hatch, masked and painted.

Neil

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #20 on: March 18, 2018, 08:02:50 pm »

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Umi_Ryuzuki

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #21 on: March 21, 2018, 03:36:29 am »

Mask mask mask, draw draw draw, cut cut cut, pick pick pick, overmask and paint paint.

...

hama

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #22 on: March 21, 2018, 07:30:23 am »

Wow! Amazing. All worth the effort.
Hama
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Umi_Ryuzuki

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #23 on: March 22, 2018, 01:48:02 am »

Thank you.

The roof, sort of the final bit of non skid.  O0

Umi_Ryuzuki

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Re: US Coast Guard 45 RBm (Graupner Pilot Boat)
« Reply #24 on: March 22, 2018, 05:56:07 pm »

And that last little bit on the front of the pilot house.
Now I can get back to railings.  O0
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