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Author Topic: Fairplay 00: A Mutlifunctional Vessel (based on PAULA by Romarin/Krick) 1:25  (Read 7208 times)

Speed123

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Hello,


some time ago I got hold of complete Kit For "Paula by ROMARIN" including all required basic stuff (Motors, Servos, Winches)
So the project started to build this kit with as much as possible function.
The model is not based a real ship, it is designed with a working crane for handling of buoys.
Also the goal was to make changes/improvments whereever sensable.


The kit:
Baukasten.jpg


Hull:
S4-01004HPG.jpg


At first the weigths were checked and the initial ballast (Leadballs) were placed in the hull and fixed with epoxy-resin.
S4-01005HPG.jpg


Next the ship was equipped with a small bow truster as it is also intended to fetch free floating objects (buoys);
this thruster should help in the effort.
S4-01008HPG.jpg


Fixing the deck to the hull is easy, just make sure that you enough clamps:
S4-01030HPG.jpg


For operating the crane hook up and down, the intended sailing-winch was replaced by a continious turnnig servo; the handling of the hook is now much easier and can be done more precise:
S4-01071HPG.jpg


The designer of the model forgot some openings in the bulwark for getting ropes to the bollards. four of them were added to the front section:
S4-01062HPG.jpg


In the meantime the crane is working and first tests in the drydock were made:


https://youtu.be/tZDtxYGn65Y


Also a first short test in the water was made to check the leveling and the drive functions:


https://youtu.be/YFmR6xroEgo


All seems to work fine, so this project continues.


Best regards
Hans


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Pauli

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Hi Hans,


I am really pleased that you have started this build log of the Romarine "Paula" as I intend this should be my next project. I also intend to incorporate some complexities into the build such as a functioning boom/crane and bow thruster.


Might I ask what make/model of bow thruster that you installed in your model?


Looking forward to the next up date to your build log.




Pauli

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Speed123

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Hello Pauli,


good selection for your next project. It will offer a lot possibilties for added functions.
for operating the crane there a special set available from ROMARIN/KRICK.
Just make sure that this set and the kit for the ship are matching, since different versions of both were existing over time.


The bow thruster is made by RABOESCH; it is the smallest with 10mm diameter.
On the second video it is in operation starting at 0:38.
I have attached the spec-sheet for your reference.


Best Regards
Hans
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Pauli

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Hi Hans,


Thanks for your advice regarding ensuring that both the version of the boat and the version of the special functions kit match (I hadn't considered that).


I have found a vendor that can supply the model, and the special functions kit, but I will check with them that they are indeed compatible, before placing my order.


Also thanks for the info on the bow thruster - much appreciated!


Good luck with the rest of your build!


Pauli
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Speed123

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Hello Pauli,


good look for your build too; any question just a post it here or mail.


On my homepage you find a folder with of all important pictures made so far and some hints.


https://www.stapelberg.net/RC-Modellschiffe/Model-Ships/Fairplay-00/index.php/


Best Regards
Hans
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Pauli

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Hi Hans,


Thanks for pointing me to the pictures in the "Fairplay 00" folder of your homepage. The number and clarity of the pictures are a valuable resource to anyone such as myself who is thinking of building this model.


I haven't purchased this kit yet, but I will be sure to post some questions when I eventually start.


Pauli

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Speed123

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Hello,


some further steps were documented.
 The crane is now operational including working lights:
S4-01074HPG.jpg
S4-01059HPG.jpg


The back access opening was not secured with screws, instead 4 magnets were used:
S4-01035HPG.jpg
S4-01038HPG.jpg


A thin tear plate was glued on the cover for this opening; it is 5 mm bigger on each side as the coverplate, thus hiding the gap between plate and deck:
S4-01039HPG.jpg

Two wooden crossbars with threaded inserts were glued to the hull to carry a plate which will hold the receiver and other electronic equipment:
S4-01048HPG.jpg
S4-01049HPG.jpg


As I had already some light collisions with the doorframe, I decided to add an edge-protection profile (mostly used on glas or metal sheets) to the edge of the sidewall:
S4-01087HPG.jpg


The profile was secured each 5cm with a small drop of clue; it was possible to stretch it a little bit around sharp curves as in the bow:
S4-01088HPG.jpg


So far the actual status.


Best regrads
Hans
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Pauli

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Hi Hans,


Thanks for up dating your build log - great progress  :-))


I especially like the work lights attached to the crane jib.


Might I ask if the pushrod that moves the crane jib connected to a standard servo?


It looks as though a lot of effort would be required for a regular servo to move the crane jib, especially as the pushrod ball link is so close to the fulcrum point formed by the crane jib and the deck mounting thus giving only a small mechanical advantage.




Pauli

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Speed123

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Hallo Pauli,


part of the extension set for operating the crane is a strong servo and a lever, which transforms the movement from below deck to on deck:
S4-01025HPG.jpg


The movement can be seen on the this small video:


https://youtu.be/yNb8ajcvAdY


The initial tilting of the crane is shown here:


https://youtu.be/qjD1_qyOWjU


The jerky movement was due that the lever was too flexible in twisting.
A reinforcement with some 2-componet-glue stabilized the lever and the jerking got better.


Best regards
Hans
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Pauli

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Hi Hans,


The photo explains it all!


The long servo arm provides the necessary mechanical advantage in order to move the crane jib arm - quite a simple yet effective mechanism.


Thanks for the photo and links to your videos.




Pauli
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Speed123

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Hello,


the next picture shows the final guiding of the rope for the crane hook. This way the rope doesnot go through the wheelhouse and make is easier in handling:
S4-01089HPG.jpg


The wheelhouse just gets a litte slot in the bottom:
S4-01090HPG.jpg


The baseplate for the electronic equipment got a female plug for supplying the wheelhouse:
S4-01097HPG.jpg


The painting of the wheelhouse is finished ready for further assembly:
S4-01098HPG.jpg


So far the actual status


Best Regrads
Hans
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Pauli

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Hi Hans,


Thanks for updating your build log - your photos are remarkably clear.


You have made a really neat job of the electrics insulation. Regarding the DIN plug to supply power to the wheelhouse - what electrics do you intend to install there?


Also I have a question regarding the operation of the servo that you are using as a winch. Will the operator have to carefully regulate the reeling in of the rope so that the grappling hook doesn't foul the pulley mounted at the top of the crane boom or will you have some kind of limiting switch to stop the servo when it reaches it's limit?


Looking forward to your next update.  :-))




Pauli
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Speed123

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Hallo Pauli,


I try to install the "electrics" as clean as possible for it helps during the later trouble shooting


The DIN plug connects 5 wires to the wheelhouse:
+6V via the shielding
 -6V Radar
 -6V Navi-lights
 -6V Working lights
 -6V Search light
 all four are via a remote switch.


The "servo" is continious turning 360+ degrees without limits;
it is operated by one of the sticks thus having full control over the speed of the hook.
This is useful as you have the pull up the hook at the same time the crane is tilting in.
But the operator has to careful indeed.


Best regrads
Hans


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Pauli

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Hi Hans,


Thanks for the reply and explanations - those are some nice additional features with the lights and rotating radar.


Should really help to bring the model "to life" when it is completed.


Pauli

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Martin (Admin)

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Wow a DIN socket!!!

Where did you find that?!   :o


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tsenecal

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Wow a DIN socket!!!

Where did you find that?!   :o



search ebay for "4 pin DIN connector"
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Speed123

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Hallo Martin,


 the socket was purchased from my favorite supplier for electronic-components: www.conrad.com, which has an international branch with shipping to the UK.


Best Regards
Hans
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dougal99

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Ah Conrad's, busiest stand at Intermodellbau Dortmund. Total Aladdin's cave.  :-))
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Speed123

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Started with building the mast; there are two topics which needed attention and changes:


1st: The red/white/red ligths to show restricted maneuverability were not considered in the kit.
S4-01101HPG.jpg


As support for later components a washer was soldered to the mast at each relevant position:
S4-01102HPG.jpg


2nd: The overall length of the mast is planned at 330mm, which for me is way too long and not proportional to the ship:
S4-01103HPG.jpg


So the mast was shortened by 50mm, which makes it look more suitable:
S4-01104HPG.jpg


Three small holders to carry the additional lights were cut out of 3mm PS und then glued to the washers on the mast:
S4-01105HPG.jpg
S4-01106HPG.jpg


After adding the support for the radar the mast assembly looks like this:
S4-01108HPG.jpg


So far the current state of the project.


Best Regards
Hans
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Pauli

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Hi Hans,


Thanks for updating your build-log.


Is it your intention to make the lights work? If so are going to feed the wires through the hollow mast?


Also I noticed that you have mounted the radar pedestal on the mast. Will you include a motor in the pedestal to rotate the radar array?


Great progress  :-))


Pauli
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Speed123

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Hallo Pauli,


the intention is to make all four lights on the mast working by feeding the wires through the hollow tube.


The motor for the radar will be located in the wheel house and will turn the antenna via a small brass wire.


This is the plan. :-)


Best Regards
Hans
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Pauli

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Hi Hans,


Thanks for your reply.


I didn't think about having an extended drive to the radar via the wheelhouse. I guess that the radar pedestal is too small to accommodate a motor - be interesting to see how you do this.


Looking forward to your next update.


Pauli
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Speed123

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Hello,


next step in the build is the driven radar antenna. As the box underneath the radar is rather small, I decided to drive the antenna from inside the wheel house.
At first the antenne received a 1mm wire as drive-shaft:
S4-01110HPG.jpg


The kit contains some brass bushings, which can be used as bearing for the drive shaft.
One build into the box underneath the antenna:
S4-01109HPG.jpg


And the second one is build into the roof of the wheel house:
S4-01111HPG.jpg


A small motor with gear redction serves as drive:
S4-01112HPG.jpg


The coupling between both shafts was done via a shrink hose and two clamping rings:
S4-01113HPG.jpg


Once the hose is shrunk to both shafts, the clamping ring are fixed and are transfering the "torque":
S4-01114HPG.jpg


The motor is then mounted to some substructure suitable to be glued to the wall of the wheel house:
S4-01116HPG.jpg


After fitting the assembly in heigth until both shafts are inline, it can be fixed and both shaft are clamped:
S4-01117HPG.jpg


The motor is operated at 5VDC and the movement looks like this:


https://youtube.com/shorts/a8n2r2g6kqo?feature=share


Best Regards
Hans



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Pauli

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Hi Hans,


Thanks for updating your build-log.


Very neat installation of the radar drive mechanism and your choice of motor and gearbox results in a very realistic rotational speed of the radar array.


Might I ask why you are powering it from a 5V supply as most batteries are made up from multiples of 1.5V e.g 3.0V / 4.5V / 6.0V etc. ?


Anyway, great progress - looking forward to your next update  :-))




Pauli

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Speed123

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Good morning Pauli,


The ship has source of power; a 6-cell 7,2Volt rechargable NiCd Battery.


I have an adjustable step-down converter set to 5,6 Volts and have everything that is supposed to run
at 6Volts hoocked up to it;
My idea is to run lightbulbs, LEDs, Foghorn and other with this reduced voltage given them a longer life.
I just do not want to exchange a bulb at the mast for example.


As for the radar motor - in order to get e decent RPM -I have reduced the feeding voltage by another 0,6 Volts using a
Zener diode.


Hope this not too confusing.


Best regrads
Hans
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