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Author Topic: Coastal range ex-Smit-tug  (Read 169626 times)

Hande

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Re: Coastal range ex-Smit-tug
« Reply #450 on: May 13, 2021, 02:27:12 pm »

Thank you!  :-)
Hande
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Hande

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Re: Coastal range ex-Smit-tug
« Reply #451 on: May 27, 2021, 09:44:49 pm »

I had the snap! {:-{
I didn't (wasn't skilled enough to) use pins for better attachment of the kort nozzels.
This is my punishment!  <*<
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Hande

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Re: Coastal range ex-Smit-tug
« Reply #452 on: May 27, 2021, 09:57:40 pm »

The mast is ready for painting. I liked working with brass tubes and wires.
Ignore the pins that the mast is hanging from (the picture is turned 90 degrees).


I needed to make the ...erm... pieces that the mast holding strings are connected to in the back of the wheel house and in the stacks.


I dived into my fishing gear and found a practical solution to the ends of same strings  %)
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Hande

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Re: Coastal range ex-Smit-tug
« Reply #453 on: May 27, 2021, 10:01:28 pm »

This is now the implementation of the solution for a water tight deck as earlier advertised my me.
I am already building a small testing pool in our garden to make some trials and to get the ballast right.
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Hande

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Re: Coastal range ex-Smit-tug
« Reply #454 on: May 27, 2021, 10:07:54 pm »

Final assembly of the propeller shafts, now that I finally got the stainless steel ones. This is the lubrication that I happened to have (intended for roller skates originally). I'm expecting to see some under pressure in the shaft tube as the lubricant diminishes. I can see this by observing the level of lubricant in the transparent hoses. The installation has standed now for two weeks and no grease has come out. I have nylon spacers-slash-seals at both ends the shaft tube.
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derekwarner

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Re: Coastal range ex-Smit-tug
« Reply #455 on: May 27, 2021, 11:54:09 pm »

Hullo Hande.......


I realise the original vessel may have VPP's, but the fixed propellers shown here appear to have a very aggressive pitch  :o for a motor drive, or is it just a camera angle thing?


PS...excellent brass mast work in image 453  :-))


Derek
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Derek Warner

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Hande

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Re: Coastal range ex-Smit-tug
« Reply #456 on: May 28, 2021, 09:09:21 am »


Thank you, Derek - helping me again about propeller matters :-)
what do you mean by "for a motor drive"?

I am totally ignorant of the propeller theory. On the very first page of my blog (posts #5 through #15) in 2016 (!!) I learned alot already about kort propellers. You, too, contributed to me attaining a new level of knowledge - Thank you and the rest of the Mayhemmers O0
I was pleased then with myself about the aquisition of "real kort propellers". I didn't have - and still don't - understanding about the effect of the pitch. Well, other than realising that an aggressive pitch requires more power from the engine room, but leads to more thrust with lower revolutions.
I haven't seen pitch being an attribute of model propellers sold in webshops. So, I just chose "Kort propellers" with a given diametre.
What are the possible problems that appear with (too) aggressive pitch? My motors are brushed 540 (919D61) with a 6/1 gear delivering 2633rpm (geared) on 12V.
Motor alone delivers 154g torque and 21W at max efficiency and stall torque of the motor is 1000g. I don't know, what effect the gearbox has on these torque figures.

How worried should I be?



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Hande

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Re: Coastal range ex-Smit-tug
« Reply #457 on: June 20, 2021, 09:07:22 am »

FIRST DIP  :}


https://youtu.be/_iINEg0Ue1U


Ballast only consists of the lead battery and is too much forward.
Steering seems to work, basically. It will get better after the ballasting.
No water came through the shaft tubes.
Am I relieved!!

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derekwarner

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Re: Coastal range ex-Smit-tug
« Reply #458 on: June 20, 2021, 12:28:40 pm »

Very maneuverable  :-))  ...are you as good at 3 pint turns in the car parks?  {-) .....with a greater water footprint you will have even better success


Derek
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Hande

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Re: Coastal range ex-Smit-tug
« Reply #459 on: June 20, 2021, 12:54:42 pm »

I edited out the bits, where I rammed into the borders of my ocean. I have a lot to learn in steering - especially, when the boat is coming toward me ...
I, too, expect maneuverability to improve, once I get her down to the waterline.


Next, I want to learn about scale speeds.
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Hande

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Re: Coastal range ex-Smit-tug
« Reply #460 on: September 02, 2021, 06:56:07 pm »

I have found the amounts and positions of ballast.
First, added nails in plastic bags forward, mid-deck and aft until I got her where I wanted.
Then I weighed the bags and bought corresponding number and weight of nautical anodes. Total about three kg.
Fitted the anodes around the bottom of the hull in the right positions, and voilà, I got it right in the first iteration. I have some additional fishing weights for fine tuning after all deck fittings are installed.
The nail bag on top of the superstructure is a place holder - weight-wise - for the wheel house, stacks and the mast.
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Hande

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Re: Coastal range ex-Smit-tug
« Reply #461 on: September 02, 2021, 07:00:47 pm »

I found a very practical chariot in a camping equipment store.
Front wheels turn so that the chariot turns on the spot. Hard bottom is removed and folded, when the whole is folded as per pics.
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Hande

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Re: Coastal range ex-Smit-tug
« Reply #462 on: October 09, 2021, 07:34:23 pm »


VIDEOTest #3, with correct ballast.
Maneuverability is better than I ever dreamed of. Here tank steering.
Rudder steering in a pond this small doesn't tell me anything.
I need to practice much much more. But even this trial with my poor steering skills shows that I am going to make her turn on the spot.
The response to throttle is too abrupt to be realistic. I have to look into the settings of my Taranis radio.


https://youtu.be/R-JfN9IEBHY


Summer was all about domestic affairs and travel, then I broke my back. Now I will finally be able to carry on with my build.

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Hande

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Re: Coastal range ex-Smit-tug
« Reply #463 on: December 17, 2021, 07:56:19 pm »

Been working on the little things.
https://youtu.be/DE4j1PGPAMo

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Hande

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Re: Coastal range ex-Smit-tug
« Reply #464 on: January 09, 2022, 10:18:53 am »

A number of tyre fenders being made. It helps a lot the fact that my tyres are (at least mostly) of real rubber. Once you get the chain through, the rubber naturally squeezes back in to secure the chain in place.
I thank Ray (CaptPodge) for his question, whether I was going to use string or chain. Having not even thought about it beforehand, I realise that chain looks so much greater than string.
I got the chain from Italeri
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RST

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Re: Coastal range ex-Smit-tug
« Reply #465 on: February 19, 2022, 12:54:59 am »


I got exactly the same "Formula 560". Amazing it lasts forever!
Might I interject with some note of caution on this adhesive.  It might work great as canopy glue but having used it myself on a BOAT a couple of times I found it is NOT waterproof. It's not even splash-proof!  I bought this stuff on recommendations from forums but unless my bottle was wrong it is NOT waterproof -indeed I found it no different from "tacky glue" PVA on application anyway....

...When I disposed of it I splashed some water on it as a test and it pretty much turned back into white school glue after a few seconds!
It's pretty much school PVA glue in a fancy bottle in my experience!  You can see in the pic below just a few squirts of water and the 560 canopy glue all starts to go back white and back to being rtegular PVA again.  Use it with caution on a model boat!  I've no idea how to unpick some parts of a couple of models I have to get rid of this stuff!
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Hande

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Re: Coastal range ex-Smit-tug
« Reply #466 on: February 19, 2022, 02:44:09 pm »

Thanks for the good point! I have used it way above the waterline, but sure thing, splashes are inevitable all over the ship. I have to check if there are some critical spots to cover.


Fortunately, it is very easy to remove with a blunt stick. I haven't tried to actually separate parts that are joined by the glue so I don't know how hard it sticks in the acual seam. Secondly, my application is rather as a kind of putty than a glue and I never expected it to hold under any kind of stress. The most important application is the attachment of the wheelhouse windows. If they come off, they are easy to fix.


Thanks again  O0

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Hande

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Re: Coastal range ex-Smit-tug
« Reply #467 on: March 02, 2022, 01:07:33 pm »

After months of hesitation I suddenly thought that I got it. Assembled the stacks-mast ass'y and all is fine.
I thank Oldiron for encouragement to pursue my wish to implement the mechanism by which the mast can be taken down for bridges - and of course for storage at home. To my astonisment, it actually works  :} .

edit:
Once again - deformation of a vertical picture - it's really frustrating...
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Hande

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Re: Coastal range ex-Smit-tug
« Reply #468 on: March 02, 2022, 01:11:21 pm »

corrected pic
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Hande

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Re: Coastal range ex-Smit-tug
« Reply #469 on: April 15, 2022, 10:25:56 pm »

Tyre fenders now installed.
I soldered the chain-ends together on the inside of the bulwark.
If there ever will be need, the tyres can be removed by just pulling the chain out of the squeeze of the rubber.


I have done everything to postpone the making of the handrailings. I guess, I simply have to start working on them. I know I have to make a jig. But my fear is that I cannot make it precise enough.


Also, can anyone, please, help me with the stanchions? The Billings stanchions are flat-ended, but the places they should go into are small round holes. I really don't want to spoil the work I have done so far by trying to make the holes flat to accomodate the flat ends of the stanchions!
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RST

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Re: Coastal range ex-Smit-tug
« Reply #470 on: April 15, 2022, 11:03:58 pm »

Hi Hande,

Ref: stanchions yes square peg in round hole, I usually force mine into a much smaller hole so it's elongated as they push-in rather than drilled out so wide.  I think this is pretty normal.  I tried a few things with mixed success the past few years...

Mix a little enamel paint (and I mean a little and some experimentation required with good epoxy such as Araldite, don't do it with acrylic paint but can be done with powders) and experiment how small a "blob" you can get on the end.  Otherwise I usually make sure I use a paint I can touch-up aftterwards but I'm no fine-scale modeller such as you!

If it were me I'd be more interested how you can get the gold look off those chains on the fenders!  I've not found any fool-proof method out there yet apart from blackening before fitting.

It's a great model you have built.

Rich
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Hande

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Re: Coastal range ex-Smit-tug
« Reply #471 on: April 16, 2022, 06:24:32 pm »

Thanks for the comment and the flattering, Rich!  ;)
The chains will be stained. In the pic they look more golden than they really are, but still - too clean as they are.


For the stanchions, my latest idea is to solder a pin at the end of each one. After the effort I saw with the 72 bulwark knees, it doesn't seem too tedious.
One of these days, I will begin - once I have a workable design.


I confess that I couldn't follow your idea with paint and Araldite. Is the idea that the blob would act as the pin to go into the hole on the deck?


Hande













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Hande

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Re: Coastal range ex-Smit-tug
« Reply #472 on: May 12, 2022, 06:52:25 pm »

The radar is now ready.
A tiny video here: https://youtube.com/shorts/_WJHiWdjqL4


Please, can anyone help me with the revolution scheme.
- clockwise or counterclockwise (when observed from above)?
- how many revolutions per minute?


The kit came with a regulator for tuning the rpm.


The whining noise is annoying! I know it's part of the game - but still...

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Taranis

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Re: Coastal range ex-Smit-tug
« Reply #473 on: May 12, 2022, 06:57:47 pm »

Clockwise  :-))
RPM varies on the distance being tracked
Usually between 26-30 rpm


My scratch made radar for Shannon. https://youtu.be/f753umCEzSg
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Hande

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Re: Coastal range ex-Smit-tug
« Reply #474 on: May 12, 2022, 07:21:28 pm »

Thank you very many, Andy!
I thought it looked more right running clockwise
Yours is quieter than mine - well done!

Now I can finalise the tuning.
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