Shemarah II

[Gareth JonesParticipant @garethjones79649]

Hi Arthur,

Thanks for your good wishes, all the best to you, your family and all the other model boaters out there.

Just to prove I have not spent all of the Xmas holidays sitting in front on the television in my festive onesey, here are a couple of photos of one of the trawl winches. Some of the parts are evolving as it is built and I end up throwing bits away and making new ones. One of the characteristics of the real winches is that there are a lot of exposed hex head bolts or set screws so I think I am going to need a lot of photo etched hexagons to simulate them. I still havent worked out how to do the lead screw. The latest bit I have just started is the main drive reduction gearbox (the disc on the LHS, top photo) and the hydraulic motors (not shown). The gearbox for the paying on gear and the brake drum have progressed a bit though.

Gareth

[ARTHUR COLLETTParticipant @arthurcollett48040]

Hi Gareth.

No Problem. Did not do much as well. Had lots off visitors over the vestive season. At least you had some time to continue. Back to work tomorrow. Thanks for the photos. always interesting.

Regards

Arthur

[ARTHUR COLLETTParticipant @arthurcollett48040]

Hi Gareth

Seems that job keeps you busy. Returning to work after pension never stops. Retirement age seems to be 80 now.

regards

[Gareth JonesParticipant @garethjones79649]

Hi Arthur,

Work does take up a lot of time but I have not been completely idle on the model boating front, just got sidetracked by a round about route on to a project I meant to do a while ago. As a result Shemarah has not really progressed much since Xmas.

I have spent the last three weeks replacing the shower and decorating our downstairs bathroom. One of the jobs that needed doing for some time was to clean and regrease the taps on the bath and washbasin as they were getting very stiff and difficult to operate. While I was buying some new sealing washers, the man in the local bathroom store said what you need is some waterproof silicone grease for your taps, don't use ordinary car grease it's a waste of time. So I also purchased a small tube of clear grease and the taps now work beautifully again.

A thought then ocurred to me, this could be just the stuff for lubricating model boat propshafts and rudders. I have been meaning to do a bit of winter maintenance so the first target was my model of an 80 ft Elco PT boat, Snogg. I built this model about 5 years ago and had a lot of motor and speed control problems in the process. This inspired me to write my first article for Model Boats magazine. (Its still on the website if you search for PT602). I subsequently did quite a bit more motor development and planned to write a follow up article, provisionally titled Snogg the sequel, but never got round to it.

While tinkering with Snogg on the bench I remembered that at one time I was planning to fit some alternative batteries as I have been using an odd combination of old, different capacity NiMh batteries. The following day as if by serendipity I got an email from Paul Freshney saying my article on my wife's gaff rigged ketch would be published in the next issue of Model Boats. Excellent I thought, I can use the fee to buy a couple of 11.2 volt 6100 mah LiPo batteries. I will also buy a couple of low voltage warning units as I don't want to go down the Dreamliner route and set fire to the boat or my workshop. So the batteries and bits are on order and hopefully Snogg should get its first outing in a couple of weeks. When I have done the comparative performance measurements I should be well placed to write Snogg the sequel. If that gets published who knows what might be next, maybe it will be Snogg goes brushless.

In the meantime Shemarah is resting under a dust sheet in the workshop. How are you progressing with your model?

Gareth

[ARTHUR COLLETTParticipant @arthurcollett48040]

Hi Gareth.

Yep. I do get the eye from the wife as well regarding the mainetnance at home. I also had the house painted on the outside and some rooms on the inside. The inside i did myself. At the moment i am finishing off my Amsterdam / Malabar transformation. She's about 90% complete now. I will post photo's soon. I would like to finish off this model first as space is a bit of a factor on the bench. We just got news regarding a new model boat club that was opened a week ago in Johannesburg. This will cut my travelling in half. Still a 140Km round trip. It is called the Gauteng Model Boat Club. They also got a Website under the same name to all the South Africans reading this.

Regards

Arthur

[ARTHUR COLLETTParticipant @arthurcollett48040]

HI Gareth

What she looks like now. small things such as windows, stairs etc. to fit. All spares already made just takes time to fit all.

Regards

[Gareth JonesParticipant @garethjones79649]

Hi Arthur,

Your model of Amsterdam/Malabar looks very neat and tidy. Are you going to complete it in a pristine paint finish or is it going to be weathered to some degree? I think I will finish Shemarah looking slightly scruffy but not as bad as some of the photos I have seen of her. However now she is operating as an offshore industry support vessel she always seems to look immaculate.

Over the last couple of months I have been distracted by work and various DIY jobs at home. I have finally got around to fitting a dust extractor in the workshop so we will be able to use the disc sander and scroll saw without covering everything in dust and starting coughing fits.

Shemarah has emerged from under the covers, blinking in the sunlight again. I have abandoned the winches for a while and made a start on the deck platform around them. I started by making a paper pattern to make sure the platform will fit around the winch bases as they are not fitted exactly where shown on the plans.

The supporting structure has been built on a drawing of the platform, which is a combination of the photos I have of the area and the plans. Most of the structure is 2.5 mm angle or Tee section plastic, fixed together with superglue. There are a couple of 2 mm thick 6 mm wide strips along and across the base into which are fitted 4 brass pins to locate the structure on the deck. Here is an early stage of the construction.

After carefully prising the base off the paper pattern it has been sprayed in grey primer ready for fitting the grating.

There are about 70 separate pieces of plastic strip making up the framework. The grating will be made in two halves from Isopon aluminium mesh. The mesh will be sprayed gun metal grey and given a bit of scuffing and rusting to make it look as though it has been there a while.

I will post a photo of the completed assembly in a few days. This Saturday is our club's first show outing of the year with the traditional Goole Hobbies exhibition where we will be attempting to win the coveted Lord Mayors trophy for the best stand. (only one sucessful year in 18 attempts)  Last year I had my 15 minutes of fame and was interviewed on Vixen FM radio with questions about the hobby and Goole Model Boat Club. Not quite up to Bob Abell's celebrity status but its a start.

Gareth

 

Edited By Gareth Jones on 28/02/2013 20:29:47

[ARTHUR COLLETTParticipant @arthurcollett48040]

Hi Gareth.

Also finished the painting around the house. Got the garden to look neat etc. Well these have to be done as well. After reading the artickle in the magazine on your wife's restoration i thought you might put her to work on the Shemarah LoL. Hope it goes well with the exibition and secure a win. I got involved in a new MBC in Johannesburg. Still to get every thing off the ground. I am not that upto scratch with weathering procedure for the MALABAR. Would like to try on something else first. but a bit here and there i think would look great as the pictures i'm working form was taken in drydock and it looks quite neat as it had a new paint job.

Regards

Arthur

[Gareth JonesParticipant @garethjones79649]

The grating has been completed and painted, just needs a bit of weathering and distressing to finish it off.

I have made a bit more progress with the first of the winches. It's reached the point where I have had to tack it together with superglue as there are so many bits in the assembly.

Still lots to add though but I am planning to retire from work again at the end of this month so I should have more time to spare and progress Shemarah a bit faster than the past 6 months.

Gareth

[Gareth JonesParticipant @garethjones79649]

Well after 6 months hard labour I am now a free man again. Well as free as I can be bearing in mind my wife's new list of jobs to do now I have retired. Its not quite as long as the one when I retired 3 years ago and the jobs are not quite as big but its still a big list.

However I did manage to get a few hours in the workshop today, mainly sticking photoetched nuts on to the first winch. The sizes are a range including 0.8 mm, 1.0 mm and 1.2 mm as seems appropriate.

The next steps are the detailing of the brake drum, the hydraulics, the paying on gear and finally the cable itself, plus painting at various stages.

[LARRY WHETTONParticipant @larrywhetton68737]

Hi Garath,

Nice nuts , the model ones i mean very nice detail i enjoy making the little bits and bobs

like several mini models, a long side the main feature,

building a narrow boat 12th scale , all internals will be scratch built ,

but like swmbo as other plans decorating , gardening, and the todoit list ,

enjoy the retirent , cheers Larry….

[LARRY WHETTONParticipant @larrywhetton68737]

Hi Garath,

Nice nuts , the model ones i mean very nice detail i enjoy making the little bits and bobs

like several mini models, a long side the main feature,

building a narrow boat 12th scale , all internals will be scratch built ,

but like swmbo as other plans decorating , gardening, and the todoit list ,

enjoy the retirent , cheers Larry….

[ARTHUR COLLETTParticipant @arthurcollett48040]

Hi Gareth.

Welcome back. Wonder how long this retirement will last. Well as long as the health keeps up one will never know. Enjoy.

Arthur

[ARTHUR COLLETTParticipant @arthurcollett48040]

Hi Gareth.

Welcome back. Wonder how long this retirement will last. Well as long as the health keeps up one will never know. Enjoy.

Arthur

[ARTHUR COLLETTParticipant @arthurcollett48040]

Hi Gareth.

Welcome back. Wonder how long this retirement will last. Well as long as the health keeps up one will never know. Enjoy.

Arthur

[Gareth JonesParticipant @garethjones79649]

Thanks for that Larry, glad you like them. Now I have shown you mine, the rules are you have to show me yours. I got the photo etched nuts from a company called Kit Form Services who specialise in 1:24 scale commercial vehicle models and accessories but they do quite a few bits that are useful for model boats including windscreen wipers, treadplate/chequerplate and various meshes. However they work exclusively in 1:24 scale so if your model is a smaller or bigger scale, hard luck.

Retirement is better the second time around Arthur. Less stress in leaving work, no need to make a speech and less time sitting around thinking this is nice, rather than getting on with something productive.

Here are a couple of pictures of the second version of the winch paying on gear. The first prototype wasn't up to much. By the time I have made them for all three winches and got the knack of it I might make an extra one and replace this one.

On the real Shemarah the upper cross piece has a very prominent lead screw cut into it, but not having a lathe, I have not yet worked out how I am going to reproduce that.

[Gareth JonesParticipant @garethjones79649]

Thanks for that Larry, glad you like them. Now I have shown you mine, the rules are you have to show me yours. I got the photo etched nuts from a company called Kit Form Services who specialise in 1:24 scale commercial vehicle models and accessories but they do quite a few bits that are useful for model boats including windscreen wipers, treadplate/chequerplate and various meshes. However they work exclusively in 1:24 scale so if your model is a smaller or bigger scale, hard luck.

Retirement is better the second time around Arthur. Less stress in leaving work, no need to make a speech and less time sitting around thinking this is nice, rather than getting on with something productive.

Here are a couple of pictures of the second version of the winch paying on gear. The first prototype wasn't up to much. By the time I have made them for all three winches and got the knack of it I might make an extra one and replace this one.

On the real Shemarah the upper cross piece has a very prominent lead screw cut into it, but not having a lathe, I have not yet worked out how I am going to reproduce that.

[Gareth JonesParticipant @garethjones79649]

Thanks for that Larry, glad you like them. Now I have shown you mine, the rules are you have to show me yours. I got the photo etched nuts from a company called Kit Form Services who specialise in 1:24 scale commercial vehicle models and accessories but they do quite a few bits that are useful for model boats including windscreen wipers, treadplate/chequerplate and various meshes. However they work exclusively in 1:24 scale so if your model is a smaller or bigger scale, hard luck.

Retirement is better the second time around Arthur. Less stress in leaving work, no need to make a speech and less time sitting around thinking this is nice, rather than getting on with something productive.

Here are a couple of pictures of the second version of the winch paying on gear. The first prototype wasn't up to much. By the time I have made them for all three winches and got the knack of it I might make an extra one and replace this one.

On the real Shemarah the upper cross piece has a very prominent lead screw cut into it, but not having a lathe, I have not yet worked out how I am going to reproduce that.

[Bob Abell 2Participant @bobabell2]

Hello Gareth

Could you not use screwed rod?…….For the top bar

I could make you one…….FOC of course

Bob

[Bob Abell 2Participant @bobabell2]

Hello Gareth

Could you not use screwed rod?…….For the top bar

I could make you one…….FOC of course

Bob

[Bob Abell 2Participant @bobabell2]

Hello Gareth

Could you not use screwed rod?…….For the top bar

I could make you one…….FOC of course

Bob

[Gareth JonesParticipant @garethjones79649]

Hi Bob,

Thank you for your very kind offer. I have considered using a piece of threaded rod and if I eventually go down that route I would probably just thread a length of brass rod using a die by hand. However, while it might seem a bit pernickety, it would not really look like the real thing. The picture below is by Jim Pottinger and shows one of Shemarah's winches. As you can see the lead screw is a very coarse square or acme thread shape and its that effect I would like to create.

If you have any eureka moments I am sure you will let you know. I had one on Elizabeth's 36R yacht last week, I must get round to adding it on the thread.

Regards

Gareth

[Gareth JonesParticipant @garethjones79649]

Hi Bob,

Thank you for your very kind offer. I have considered using a piece of threaded rod and if I eventually go down that route I would probably just thread a length of brass rod using a die by hand. However, while it might seem a bit pernickety, it would not really look like the real thing. The picture below is by Jim Pottinger and shows one of Shemarah's winches. As you can see the lead screw is a very coarse square or acme thread shape and its that effect I would like to create.

If you have any eureka moments I am sure you will let you know. I had one on Elizabeth's 36R yacht last week, I must get round to adding it on the thread.

Regards

Gareth

[Gareth JonesParticipant @garethjones79649]

Hi Bob,

Thank you for your very kind offer. I have considered using a piece of threaded rod and if I eventually go down that route I would probably just thread a length of brass rod using a die by hand. However, while it might seem a bit pernickety, it would not really look like the real thing. The picture below is by Jim Pottinger and shows one of Shemarah's winches. As you can see the lead screw is a very coarse square or acme thread shape and its that effect I would like to create.

If you have any eureka moments I am sure you will let you know. I had one on Elizabeth's 36R yacht last week, I must get round to adding it on the thread.

Regards

Gareth

[Bob Abell 2Participant @bobabell2]

Hello Gareth

Looking at the threaded shaft…….It happens to be a left and right hand groove and not a thread, it is used for a reciprocating motion

To do it properly would be very difficult, as the threads are contious…..and don't break out at the ends

What are the dimensions please?

Bob

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