Model Boat Mayhem
Mess Deck: General Section => Tugs and Towing => Topic started by: Moller62 on January 20, 2018, 12:22:44 pm
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The winter print.
Searching for a small tug as a winter project I came accross the Damen Stan tug 1907.
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There is no actual kit of this tug in a small size but it's 'offered' as a 3D print here: https://www.youtube.com/watch?v=oz8k-SL4xmU and here: https://www.thingiverse.com/thing:2346104.
I wrote a mail to mr. Ernest aka 'byedesign'.
I got the stl file for 10 $ i think, and ordered a print at a local 3D print shop here in Copenhagen.
The result is here.
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The hull was glued with super glue aka cyano acrylat and basic car primer filler was applied.
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The propeller shafts
The shafts are expected to be 2mm i diameter in order to fit the printed propellers.
I made my tube/bushings of brass Ø 4/3 mm and Ø 3/2 mm.
The shafts were made along the describtion in http://www.building-model-boats.com/model-boat-propeller-shaft.html (http://www.building-model-boats.com/model-boat-propeller-shaft.html) .
The dimensions of the shafts are depicted below.
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And yes it is your's truly on the double bass - http://allanmeinhardt.dk/trio
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An important hint regarding the propeller shaft, is to insert the shaft in the outher tube and bushings,
while you are doing the soldering job.
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Here the shafts are mounted in the hull.
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test mounting
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Final 'montage'
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That's Awesome!!
What are the overall 3D model dimensions?
How much were the print costs?
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Great work so far! I really do think 3D printing will really be a huge part of modelling eventually, even though it's really cheating.
Damen's website never fails to amuse me. Want a 20,000t bulk carrier? Not a problem, we've got 3 of those in stock, would you like to buy a few harbour tugs, a dredger, a dive boat and whilst you're at it you may as well buy a fleet of police boats too?
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Oops, I thought you were looking for a kit.... %)
There is a kit in 1/25 scale
http://www.modellbau-sievers.de/ (http://www.modellbau-sievers.de/)
https://www.rcgroups.com/forums/showthread.php?2450835-Damen-Stan-Tug-1907&highlight=stan (https://www.rcgroups.com/forums/showthread.php?2450835-Damen-Stan-Tug-1907&highlight=stan)
I did the fendering for the builder. ok2
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That's Awesome!!
What are the overall 3D model dimensions?
How much were the print costs?
I think the same and want to have it 1/87 scale :-)
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Thx. for the nice comments.
Dimensions:
Length of the model is approx 27.5 cm aka 27.5x72 = 19.8 m.
According to the Damen site:
https://products.damen.com/en/ranges/stan-tug/stan-tug-1907 (https://products.damen.com/en/ranges/stan-tug/stan-tug-1907)
it should be 19.54, so that seems pretty close.
Print price:
I paid 130$ for the print.
Cheep or expensive?
If the print was to be ordered at Shapeways, I think the price would be at least double up, but the print quality would most likely also be better.
You could also compare to the Graupner Pollux 2 available at approx 130£.
Sievers:
Great work with the fendering. I was not aware of the kit from Sievers.
Scale:
The stl files from Ernest ([email protected]) are in scale 1:72, but it should be straight forward to rescale it to 1:87. Maybe we will see Stan 1907 in Hamburg WunderLand someday :-) ?
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. Maybe we will see Stan 1907 in Hamburg WunderLand someday :-) ?
Oops, you are able to read my thoughts... ;-)
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The rudders are intended to have 2 mm shafts and the same goes for the 'printed' bushings.
I decided, as seen on the preveies picture, to make 3 mm holes and insert ø3/2 mm bushings.
Here the rudder arrangement can be seen from inside the hull.
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The print contains servo-horns but there is no means of fixing them without glue.
Instead I sourced some at the internet and made a small modification to fit my needs.
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Time for painting.
I used various acrylic paints.
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Here is a picture of the rudder arrangement suggested by the designer (byedesign). Pricture from thingiverse.
(https://cdn.thingiverse.com/assets/70/8a/31/87/d8/20171119_222141.jpg)
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This will block where I draw the red circle...
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Yes you are right. That might be potential problem.
On the other hand I guess it's the tug you can see on youtube.
Anyway I had a similar issue with my rudder handling.
So i had to cut the plywood at the dotted line.
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Another pic from the paint session, now including the driveline(mabuchi 2x130).
The speed controller is the smallest available for action called P68A.
http://www.action-electronics.co.uk/pdfs/P68A.pdf (http://www.action-electronics.co.uk/pdfs/P68A.pdf)
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The controller gets it's power supply from the receiver, thus savings weight.
(http://www.action-electronics.co.uk/Action%20Electronics-speed_files/P68A.jpg)
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Looks fine :-)
What's the diameter of the propellers? Are they printed ones too? I'm very interested in building this tug 1:87 scale. Theoretically the allowed weight is about 280 g. Do you know the weight of your model without RC equipment?
Regards
Harry
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Regarding the drive line.
I can not remember where i ordered the moters, but I recall they were rated at 3-6(12) volt.
Most likely its similar to this one https://www.pololu.com/product/1117 (https://www.pololu.com/product/1117).
The specs are given as:
Approximate specifications at 6 V: free-run speed of 11,500 RPM, free-run current of 70 mA, and stall current of 800 mA
(https://a.pololu-files.com/picture/0J1101.1200.jpg?de2189bded7d3451eca8de02491878d3)
The two motors are connected in parallel to the Action pico controller.
There is also another 130 motor rated at 1-6 volt.
Here the specs are quite different:
Approximate specifications at 3 V: free-run speed of 17,000 RPM, free-run current of 250 mA, stall current of 3.85 A, stall torque of 0.75 oz-in.
This motor would most like cause the Pico controller to shot down, given the higher current consumption. The Pico controller has a peak load of 1000 mA.
The propellers are part of the print. They have 5 blades with an approx. diameter of 21 mm. The narrow part of the kort nozzle is approx. 23 mm.
I'll try to get hold of the weight tomorrow.
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Weight:
Tug all inc. 360 g
Bat + radio 113 g
Tug 247 g
Pico 16 g
Motors 2x18 36 g
Rudder servo 3 g
Actual 192 g
As seen on the picture the tug floats approx 5 mm above the expected waterline.
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...Hi Guys...
I built my Tug in 1:32 Scale for Tug Towing Competitions based on the Damen Stan Tug 1907 using one of MMB,s ASD Tug Hulls. The hull needs a wee bit of tinkering but not much...Here are a couple of pictures of my model called FREEDOM...I hope you like them...
You can buy a hull from Mark,s Model Bits on E-Bay for £45 plus £15 post & Packing...
...Best Regards...Norry Mason...
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Nice looking tug clearly inspired by the Damen design. Thx. for showing U.S.
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Paint scheme inspired by(http://www.shipspotting.com/photos/middle/7/3/3/2011337.jpg)
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Still working on the roof details.
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Wonder what the 'main mast' with the two 'balls' on the side is doing. Is it a compass?
It appears to be a prominent feature of the 1907 design.
(http://static.heavyliftnews.com/media/fd/a/46c4a4f51becaad22ced4d671c784558427bc42cc20587bed86da9636e33eadf_m.jpg)
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This is not a mast but a Binnacle. At the top under the dome is a magnetic compass for navigation. The balls are used to counteract the magnetic field of the steel hull and allow the compass to read correctly.
Jim
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A colleague of me wanted to have a 3D printer as I told about the files. I hope, on Monday I will get the parts :-))
Regards
Harry
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Looks great. Is it rescaled to 1:87? What material is it printed in?
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I hope, my colleague did it scale 1:87.... It's made from PLA, quite difficult to handle I read. On Monday I will get the parts.
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Good luck.
I also heard that it should be difficult to handle.
But using cyano acrylat as glue:
(https://www.harald-nyborg.dk/media/images/800/1715_665254.jpg)
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and a car filler primer it seems to work ok.
(https://dyncdn.thg.dk/img/49012_0_m_526_878.jpg)
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Captain Airfix
Captain Airfix (from an old 1:72 kit) inspecting the 'top deck'.
The binnacle has an impressive size, but a lot of sanding and painting appears to be pending.
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Here the Captain is inspecting another Damen product.
[/img]http://www.skalamodelskibe.dk/forum/attachments/agter.jpg[/img]
(http://www.skalamodelskibe.dk/forum/attachments/total.jpg)
(https://sliedrecht24.nl/wp-content/uploads/2017/06/Sea-Axe-fast-crew-supplier-Damen-e1498556199163.jpg)
http://www.skalamodelskibe.dk/forum/viewthread.php?thread_id=162&rowstart=60 (http://www.skalamodelskibe.dk/forum/viewthread.php?thread_id=162&rowstart=60)
Cheers Søren
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Are you doing what I read is apparently "normal" prep for 3D printed parts? A wash with something like acetone or IPA is supposed to help smooth the surface and remove the printer contours before sanding, priming and then sanding / cutting back before painting.
...just regurgitating the info from other sources -Ive watched lots of guys do 3-d printing but never tried it myself.
Nice little model anyway.
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Smoothing with hot acetone vapour only works with ABS not PLA. PLA does not dissolve with solvent based glues so needs something like superglue to join. I have found 2 part acrylic adhesive will stick to PLA so is an alternative.
Jim
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I agree that acetone will not work with PLA. I washed the parts with standard dishwasher solution and applied 3 rounds of car primer filler with sanding in between.
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How is it going with the ‘Wunderland’ version?
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Ice breaking
https://youtu.be/auBvZO6US3Q (https://youtu.be/auBvZO6US3Q)
4 mm ice, 300 gram tug.
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Still working on the roof details.
Eventhough the Damen web site is a great source, when making the 1907 tug,
it could be nice with some drawings.
By accident i found this Russian page about tug 1907.
https://paper-models.ru/journals/item/bumazhnoe-modelirovanie-198-buksir-kantovshhik-general-raevskij (https://paper-models.ru/journals/item/bumazhnoe-modelirovanie-198-buksir-kantovshhik-general-raevskij)
(https://paper-models.ru/images/models-pub/bm/151-1.jpg)
The page has a download link to a zip file, containing a full cardboard model of the Stan tug 1907.
It appears to be of good quality with instructions sheets and drawings,
usefull for details regarding fitting out your model.
You can of course also build the model using cardbooard or plywood and make a cheep working model without 3D print.
Here is an extract from the zip file.
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The missing table.
The print includes a table for the wheelhouse.
Somehow it got lost but luckily i managed to recover it before the vacuum cleaner.
Looks as if the painter has some small repair jobs, but the color on the floor seems pretty close to the Damen choise.
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Searching for a new motor
The very limited test sailing performed sofar, has proved that the current Polulu motors works fine.
The Polulus are strong enough but as always with small modelboats they seem to fast.
I'am looking for high torque and low RPM.
The Polulus has enough torque for the given propellers,
but due to possible debris in the water you would always want more torque and if possible lower RPM.
The model is designed for 130 size motors but the length of the motors are not limited so 180 size motors will also fit.
I've ordered 3 different motors, sourced on the internet.
The motors has been 'tested' metering the 'empty load' current and the stall current.
The motos were attempted stalled with my fingers.
The test was performed using 4 new alkaline 1.5v cells.
The voltage at the motor pins was 5.5v and the short circuit current was 1500 mA.
After the test I've opted for the no name motor KK A6
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The motors
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For convenience I've added the links as text.
KK A6 [size=78%]https://www.aliexpress.com/item/2PCS-180-dc-motor-strong-magnet-3-9V-For-toy-ship-Car-model-3V-10000-RPM/32843900135.html?spm=a2g0s.9042311.0.0.IvqRlU (https://www.aliexpress.com/item/2PCS-180-dc-motor-strong-magnet-3-9V-For-toy-ship-Car-model-3V-10000-RPM/32843900135.html?spm=a2g0s.9042311.0.0.IvqRlU)[/size]
180SH-2395 [/size][size=78%]https://www.aliexpress.com/item/2X-16mm-long-axis-WFF-180SH-2395-Metal-brush-DC-motor-Mute-High-speed-CD-player/32775610642.html (https://www.aliexpress.com/item/2X-16mm-long-axis-WFF-180SH-2395-Metal-brush-DC-motor-Mute-High-speed-CD-player/32775610642.html)[/size]
FF-180PH-2855 [/size][size=78%]https://www.ebay.com/itm/MABUCHI-FF-180PH-2855-DC-3V-6V-17400RPM-High-Speed-180-Motor-DIY-Electric-Shaver-/262977697471 (https://www.ebay.com/itm/MABUCHI-FF-180PH-2855-DC-3V-6V-17400RPM-High-Speed-180-Motor-DIY-Electric-Shaver-/262977697471)[/size]
Polulu [/size][size=78%]https://www.pololu.com/product/1117 (https://www.pololu.com/product/1117)[/size]
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Looking at the motor specs (shown above) how are you going to slow those motors down? 17000rpm :o the tug will be planing like an offshore power boat racer!
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I agree with Brian60 that the motor rated at 17000 rpm is not well suited for this projekt.
Instead I used the no name option rated at 3V 10000 rpm.
I've tried the motors in two configurations.
The first configuration with one esc controlling both motors.
A video with this configuration can be seen here.
https://www.youtube.com/watch?v=4ymHigkdKt0&t=55s (https://www.youtube.com/watch?v=4ymHigkdKt0&t=55s)
It works ok, but the steering ability does not seem to good.
It's hard to turn the tug around in a simgle arch without touching the banks of the pond.
The second configuration utilizes the p82 w-tail mixer from action.
http://www.action-electronics.co.uk/pdfs/P82.pdf (http://www.action-electronics.co.uk/pdfs/P82.pdf)
This setup has a dedicated esc for each motor.
It can be seen here.
https://www.youtube.com/watch?v=WHRA70MtYQk&t=15s (https://www.youtube.com/watch?v=WHRA70MtYQk&t=15s)
Now it's possible to turn the tug on the spot.
Only concern is is that the mixer seems to accelrate the tug when a turn is attempted at low speed.