Model Boat Mayhem
The Shipyard ( Dry Dock ): Builds & Questions => Working Vessels => Topic started by: Speed123 on October 16, 2021, 05:21:27 pm
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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:
(https://www.modelboatmayhemimages.co.uk/images/2021/10/11/Baukasten.jpg)
Hull:
(https://www.modelboatmayhemimages.co.uk/images/2021/10/11/S4-01004HPG.jpg)
At first the weigths were checked and the initial ballast (Leadballs) were placed in the hull and fixed with epoxy-resin.
(https://www.modelboatmayhemimages.co.uk/images/2021/10/11/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.
(https://www.modelboatmayhemimages.co.uk/images/2021/10/11/S4-01008HPG.jpg)
Fixing the deck to the hull is easy, just make sure that you enough clamps:
(https://www.modelboatmayhemimages.co.uk/images/2021/10/11/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:
(https://www.modelboatmayhemimages.co.uk/images/2021/10/11/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:
(https://www.modelboatmayhemimages.co.uk/images/2021/10/11/S4-01062HPG.jpg)
In the meantime the crane is working and first tests in the drydock were made:
https://youtu.be/tZDtxYGn65Y (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 (https://youtu.be/YFmR6xroEgo)
All seems to work fine, so this project continues.
Best regards
Hans
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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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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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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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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/ (https://www.stapelberg.net/RC-Modellschiffe/Model-Ships/Fairplay-00/index.php/)
Best Regards
Hans
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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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Hello,
some further steps were documented.
The crane is now operational including working lights:
(https://www.modelboatmayhemimages.co.uk/images/2021/10/11/S4-01074HPG.jpg)
(https://www.modelboatmayhemimages.co.uk/images/2021/10/22/S4-01059HPG.jpg)
The back access opening was not secured with screws, instead 4 magnets were used:
(https://www.modelboatmayhemimages.co.uk/images/2021/10/22/S4-01035HPG.jpg)
(https://www.modelboatmayhemimages.co.uk/images/2021/10/22/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:
(https://www.modelboatmayhemimages.co.uk/images/2021/10/22/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:
(https://www.modelboatmayhemimages.co.uk/images/2021/10/22/S4-01048HPG.jpg)
(https://www.modelboatmayhemimages.co.uk/images/2021/10/22/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:
(https://www.modelboatmayhemimages.co.uk/images/2021/10/22/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:
(https://www.modelboatmayhemimages.co.uk/images/2021/10/22/S4-01088HPG.jpg)
So far the actual status.
Best regrads
Hans
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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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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:
(https://www.modelboatmayhemimages.co.uk/images/2021/10/25/S4-01025HPG.jpg)
The movement can be seen on the this small video:
https://youtu.be/yNb8ajcvAdY (https://youtu.be/yNb8ajcvAdY)
The initial tilting of the crane is shown here:
https://youtu.be/qjD1_qyOWjU (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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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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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:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/01/S4-01089HPG.jpg)
The wheelhouse just gets a litte slot in the bottom:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/01/S4-01090HPG.jpg)
The baseplate for the electronic equipment got a female plug for supplying the wheelhouse:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/01/S4-01097HPG.jpg)
The painting of the wheelhouse is finished ready for further assembly:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/01/S4-01098HPG.jpg)
So far the actual status
Best Regrads
Hans
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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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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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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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Wow a DIN socket!!!
Where did you find that?! :o
(https://www.modelboatmayhemimages.co.uk/images/2021/11/01/S4-01097HPG.jpg)
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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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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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Ah Conrad's, busiest stand at Intermodellbau Dortmund. Total Aladdin's cave. :-))
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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.
(https://www.modelboatmayhemimages.co.uk/images/2021/11/05/S4-01101HPG.jpg)
As support for later components a washer was soldered to the mast at each relevant position:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/05/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:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/05/S4-01103HPG.jpg)
So the mast was shortened by 50mm, which makes it look more suitable:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/05/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:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/05/S4-01105HPG.jpg)
(https://www.modelboatmayhemimages.co.uk/images/2021/11/05/S4-01106HPG.jpg)
After adding the support for the radar the mast assembly looks like this:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/05/S4-01108HPG.jpg)
So far the current state of the project.
Best Regards
Hans
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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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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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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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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:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/08/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:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/08/S4-01109HPG.jpg)
And the second one is build into the roof of the wheel house:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/08/S4-01111HPG.jpg)
A small motor with gear redction serves as drive:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/08/S4-01112HPG.jpg)
The coupling between both shafts was done via a shrink hose and two clamping rings:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/08/S4-01113HPG.jpg)
Once the hose is shrunk to both shafts, the clamping ring are fixed and are transfering the "torque":
(https://www.modelboatmayhemimages.co.uk/images/2021/11/08/S4-01114HPG.jpg)
The motor is then mounted to some substructure suitable to be glued to the wall of the wheel house:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/08/S4-01116HPG.jpg)
After fitting the assembly in heigth until both shafts are inline, it can be fixed and both shaft are clamped:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/08/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
[/size]
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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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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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Hi Hans,
Thanks for your detailed reply.
Great idea using a step down converter to regulate the voltage to the various accessories and the zener diode to more precisely regulate the voltage to the radar motor.
You attention to detail with the electrics should make for a flawless model.
Pauli
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Hello,
next issue is finishing the mast.
At first the wires for the bulbs needed to be fiddled into the mast (was easier than thought of):
(https://www.modelboatmayhemimages.co.uk/images/2021/11/13/S4-01119HPG.jpg)
The housing for lights were taped and then glued to the holder.
The wires were fixed underneath the holders:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/13/S4-01121HPG.jpg)
After spray painting (primer and top coat) the mast is ready for assemby to the wheel house:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/13/S4-01122HPG.jpg)
Last details were mounted to the wheel house (position- and search-lights, horns, safety equipment):
(https://www.modelboatmayhemimages.co.uk/images/2021/11/13/S4-01124HPG.jpg)
Once the mast ist set to the wheel house wiring will start.
Best Regards
Hans
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Hi Hans,
Thanks for updating your build-log - its coming along nicely.
By the way, that's a nice chrome search light on the cabin roof - was that provided with the kit or did you source it separately?
Pauli
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Hello Pauli,
the search light was part of the kit and has room enough for a decent light.
Best regards
Hans
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Hello,
Yesterday the mast was mounted and fixed:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/15/S4-01125HPG.jpg)
All lights were wired and tested:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/15/S4-01127HPG.jpg)
(https://www.modelboatmayhemimages.co.uk/images/2021/11/15/S4-01130HPG.jpg)
The search light came out strong enough to act as such:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/15/S4-01133HPG.jpg)
So far the installed illumination:
two working lights at the crane
navi lights (stb, port, top und rear)
three signal lights
one search light
The working deck in the rear has not enough illumination; two working lights will added.
https://youtu.be/z3_DJ9qhP_I (https://youtu.be/z3_DJ9qhP_I)
BestRegards
Hans
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Hi Hans,
Your build is looking great - the lights really help to bring it to life :-))
Do all of your lights use incandescent "grain of wheat" bulbs or have you used LED's in any of them?
Also are they all powered by one switched supply or are some switched individually?
Thanks for the update - looking forward to the next instalment of your build.
Pauli
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Hallo Pauli,
Stb, port, and search light are LED, the other are lightbulbs,
Three "groups" to switch:
a) Search light
b) Navigation lights
c) Signal- and working lights
Best Regards
Hans
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Hi Hans,
Thanks for your prompt and detailed reply.
Pauli
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Hello,
Little progress to announce; some details were added to the ship.
Lifebuoys and life jackets were installed:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/20/S4-01135HPG.jpg)
Captain and helmsman arrived in the wheel house:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/20/S4-01137HPG.jpg)
(https://www.modelboatmayhemimages.co.uk/images/2021/11/20/S4-01138HPG.jpg)
Little Hein still has no work and is waiting....
(https://www.modelboatmayhemimages.co.uk/images/2021/11/20/S4-01139HPG.jpg)
The working area will now get a wooden surface. The cutting of the sections is in progress:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/20/S4-01140HPG.jpg)
Best regards
Hans
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Hi Hans,
Thanks for updating your build-log.
Your wooden decking looks very realistic - was it provided with the kit or have you sourced it separately?
Pauli
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Crew seem happy enough! :-))
(https://www.modelboatmayhemimages.co.uk/images/2021/11/20/S4-01139HPG.jpg)
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Hallo Pauli,
the wodden decking was not part of the kit; the idea just came 2 weeks ago and I had to buy it > at www.Krickshop.de and search for "boatdecks".
Best Regards
Hans
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Hi Hans,
Thanks for your reply.
The wooden decking is a great idea - it will certainly add to the realism of the completed model.
Pauli
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Cheap Paula on ebay UK now: https://www.ebay.co.uk/itm/384513360555?hash=item5986c842ab:g:n-MAAOSwXThhml-l
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Little progress last week;
Made a few ropes:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/29/S4-01141HPG.jpg)
and placed them after painting on the deck:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/29/S4-01142HPG.jpg)
The holders for the lifevests and two flood-lights were added on the wheel-house:
(https://www.modelboatmayhemimages.co.uk/images/2021/11/29/S4-01143HPG.jpg)
Best Regards
Hans
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Hi Hans,
Thanks for updating your build-log :-))
The ropes are a nice touch - did you dye them?
By the way, I was wondering how the wheelhouse is attached to the deck - is it just a push fit over the raised coaming around the main access hatch?
Kind regards,
Pauli
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Hi Pauli,
the ropes were just brushed with paint.
The wheel-house fits very good (tight fit) to the coaming and does not need any additional holders.
Best Regards
Hans
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Hi Hans,
Thanks for the information.
Kind regards,
Pauli
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Hello,
in this week the wooden working deck was finished.
it consists of four sections cut out from a Boatdeck-panel sold by KRICK:
(https://www.modelboatmayhemimages.co.uk/images/2021/12/03/S4-01146HPG.jpg)
In the next step the deck was drained with special paint for wodden boats and after a few days of drying ist was ground.:
(https://www.modelboatmayhemimages.co.uk/images/2021/12/03/S4-01147HPG.jpg)
(https://www.modelboatmayhemimages.co.uk/images/2021/12/03/S4-01148HPG.jpg)
next step was weathering with some suitable colors and sealling with a coat of flat clear:
(https://www.modelboatmayhemimages.co.uk/images/2021/12/03/S4-01149HPG.jpg)
(https://www.modelboatmayhemimages.co.uk/images/2021/12/03/S4-01150HPG.jpg)
The overview looks like this:
(https://www.modelboatmayhemimages.co.uk/images/2021/12/03/S4-01151HPG.jpg)
Also finished is the transport/storage box for the model:
(https://www.modelboatmayhemimages.co.uk/images/2021/12/03/S4-01153HPG.jpg)
Next is the first real test in the water > waiting for some hours with decent sunlight somewhat higher temperatures.
Best Regards
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Hi, the aft deck looks much better than supplied with the "humps" to fit the buoys. Is that an F14/16 transmitter tucked up in the last picture?
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Hello,
it is a Reflex Stick Pro by Carson:
https://www.carson-modelsport.com/carson_de/kategorien/carson-zubehoer/fernsteueranlagen/fs-reflex-stick-multi-pro-lcd-24g-14ch-500501004-de.html
Best Regards
Hans
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Hi Hans,
Thank you for updating your build log - the weathered decking looks very realistic :-))
Do you intend to mount the Romarin / Krick buoys on the deck or are you going to use different buoys or perhaps you have another use for the crane mechanism?
Kind regards
Pauli
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Hallo Pauli,
I do not intend to use the buoys supplied with the model.
I am looking at an exploration submarine; something like this:
(https://encrypted-tbn0.gstatic.com/images?q=tbn:ANd9GcRqk58Bi0EweGEpvL_eyxqaFUuZi57rgHsdJw&usqp=CAU)
At present I am searching for a suitable model.
Best Regards
Hans
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Hi Hans,
Thanks for your reply.
That will look really good if you are able to source a suitable model sub / bathyscaphe.
I have just ordered a Paula 3 myself with the special functions kit and buoy set and will probably commence building it after the Christmas holidays.
It would be nice to see a video of your model on the water once it is fully completed.
Kind regards,
Pauli
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Hello Pauli,
all the best for your build;
It would be nice to see a video of your model on the water once it is fully completed.
Certainly; the batteries are charged up; I am just waiting for spot with sunshine and not to much wind.
Best Regards
Hans
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Hi Hans,
When I commence building my Paula 3 I also intend to install a bow thruster. Reading some other modeller's experiences with bow thrusters I wondered if you consider it worthwhile making an access hatch in the deck in order to remove the bow thruster's motor and paddle if there is a problem?
On your build you have mounted the bow thruster so that the motor is vertical. I wonder if it could be rotated by 90 degrees so that the motor lies horizontal? It should then make it possible to unscrew the motor screws by reaching through the main hatch.
I would be interested to hear your thoughts on this. Am I being over cautious in the need to provide an access to the bow thruster for maintenance?
Also is your bow thruster driven by an ESC to give variable thrust or a simple on-off switch?
Kind regards
Pauli
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Hello Pauli,
this topic is a question of risk to take or not to take.
as I had no negative experience with bow thrusters from "Raboesch" I decided not to add an maintenance access.
I case I would need it in the future I would than cut an access hole and cover it with a hatch.
Turning the thruster by 90 degrees looks is a good idea, that you can later still reach the fastening screws.
Since this area for access is in my boat already used up by equipment > this not an option for me.
My small thruster is driven by a mini controller that works direct from the receiver (like a servo).
(https://www.modelboatmayhemimages.co.uk/images/2021/12/13/S4-01027HPG.jpg)
Best regards
Hans
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Hi Hans,
Thanks you for your reply.
Yes, as you say - very much a question of risk. I will probably leave the deck as it is and retro fit a hatch later on if I encounter problems.
I may, however, explore the possibility of mounting the bow thruster horizontally, unless I hear of any plausible reasons not to mount it in that orientation.
Thanks once again for your courtesy in replying to my many questions throughout your build-log. Your replies have been very helpful :-))
Kind regards,
Pauli
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Hello,
there was today an opening in the clouds with sunshine;
my camera assistant was available and off we go to our pond:
(https://www.modelboatmayhemimages.co.uk/images/2021/12/16/S4-02008HPG.jpg)
(https://www.modelboatmayhemimages.co.uk/images/2021/12/16/S4-02014HPG.jpg)
(https://www.modelboatmayhemimages.co.uk/images/2021/12/16/S4-02017HPG.jpg)
With full speed ahead the hull seems to be more a glider than a working vessel; this requires some adjustment in the setup; the motor is too strong:
(https://www.modelboatmayhemimages.co.uk/images/2021/12/16/S4-02016HPG.jpg)
The video is being processed and will follow soon; also a decent load is being prepared.
Best Regards
Cheers
Hans
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Hi Hans,
Your model looks really good, and sits well on the water. I have read on a few other people's builds of the Paula 3 that they considered that the motor was perhaps too powerful for the model, but I suppose you can always do something about this such as a change of prop or reduction in battery voltage.
By the way, I like the first aid and fire hose box's. They add a nice extra touch off detail - may ask where you got these from?
Looking forward to seeing your video. :-))
Kind regards,
Pauli
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Hello Pauli,
the wallboxes were supplied by Hobby-Lobby;
(https://www.modelboatmayhemimages.co.uk/images/2021/12/17/Walboxes.jpg)
The link to this page:
https://www.hobby-lobby-modellbau.com/onlineshop/index.php/cat/c302_Wall---Boxes.html
Best Regards
Hans
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Hi Hans,
OK, thanks for the information.
Kind regards,
Pauli
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Hello,
here is the video about yesterday's Maiden Voyage.
I think I forgot to clean the windows. {:-{
https://youtu.be/j7yHxQG5XVE
Best Regards
Hans
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Hi Hans,
Your model performs really well on the water and has a good turn of speed when you open up the throttle!
I'd be interested to see what load you eventually use with the crane. I really think it needs something in order to make full use of the crane mechanism.
The camera works well - I like the way you rotated the model on the bow thruster to make a panning shot around the pond.
Congratulations on your build it was well worth the time and effort you put into it's construction - I have picked up quite a few tips from your build-log for when I commence my build.
Kind regards,
Pauli
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Hello Pauli,
thanks for your positive Feedback and nice comments.
The load is already in the works and i might try it in the dry dock next week.
Best Regards
Hans
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Hello,
handling buoys was never my favorite; I always had a ROV for handling with the crane in mind.
So I bought a defective Mini-Sub and removed all electronic equipment, to make a little bit lighter:
(https://www.modelboatmayhemimages.co.uk/images/2021/12/22/S4-01160HPG.jpg)
Adding a "catching-ring", closing all openings glueing all parts together was the next step:
(https://www.modelboatmayhemimages.co.uk/images/2021/12/22/S4-01161HPG.jpg)
Finally a new paint and I see something that could be an underwater-unit.
(https://www.modelboatmayhemimages.co.uk/images/2021/12/22/S4-01164HPG.jpg)
The tilting area of the crane was reduced a bit and the drytests could commence.
https://youtu.be/5rQ-xA-I7-Y
All the best for Christmas to all Mayhemers and stay healthy
Hans
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Hi Hans,
The mini-sub works well with the crane and makes a nicely balanced load for it to raise and lower. It looks really good with the new paint job.
Wishing you a merry Christmas!
Kind regards,
Pauli
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Hello
On New-Years-Day it happened: the dryruns from the workbench moved to the pond.
With beautiful weather new insights were generated:
watering the submarine = no Problem;
picking it up was rather difficult and after various trials it was stopped for the day.
the gear for that function (hook and others) needs some redesign.
the catching wires as per original plan seems to have a reason for existance;
however I will still try to make it work without them.
Also the cam in the water requires a ballast in the bottom to avoid tilting
Tight turns are no problem for this boat as the center of gravity is low enough.
Details can be seen in the video below.
https://youtu.be/PjtBiolBU4A
Best Regards and all the best for 2022
Hans
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Looks great in the water and love the little submarine/rov, very cool.
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Hello
since the retrieving of the ROV was not successful some changes were incorporated:
two sycringes were taken to build additional floating devices:
(https://www.modelboatmayhemimages.co.uk/images/2022/01/13/S4-01166HPG.jpg)
Inside of the tubes a M3-scew was placed and the tubes were glued to the ROV:
(https://www.modelboatmayhemimages.co.uk/images/2022/01/13/S4-01170HPG.jpg)
Inside the hull a strong peranent magnet was placed:
(https://www.modelboatmayhemimages.co.uk/images/2022/01/13/S4-01172HPG.jpg)
This combination is strong enoug to hold the ROV in position:
(https://www.modelboatmayhemimages.co.uk/images/2022/01/13/S4-01173HPG.jpg)
So far the general idea; but is the crane strong enough to work against the magnetic force and detach ROV from the boat?
The video shows the drytest
https://youtu.be/hITjVHLS8e0
And still it remains the waiting for better conditions to test the whole issue on water.
Best regards
Hans
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Hi Hans,
An imaginative solution to the problem of retrieving the ROV and should work - but the real test will be in the water!
Kind regards,
Pauli
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yesterday we had nice and calm weather, so a first watertest was started to see if the additional magnet in the transom will improove the fetching of an object in the water.
simple answer: it does;
Also an additional run with full speed was done to demonstrate the overpowered drive of the kit.
https://youtu.be/DzzCd9-T-VE (https://youtu.be/DzzCd9-T-VE)
still open is improoving the crane for easier manipulation of the hook.
Best regards.
Hans
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Hi Hans,
Thanks for updating your build.
The ROV sits nicely in the water and the magnet seems to provide just enough force to hold the ROV in place for the crane's grappling hook to engage.
It would be nice to see a video of the crane lowering the ROV and then recovering it in order to fully demonstrate your system.
By the way, your local pond is vey nice with some delightful properties situated close by - I am very envious.
Kind regards,
Pauli
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Hi Pauli,
you are right - the next video will show the complete cycle.
I am still trying some options to make the crane operation more suitable.
I love this pond; it is in the lovely village of Wassenberg.
Best Regards
Hans
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Hallo,
here is video about the final testrun after building the model; including dropping off and retrieving the "dive unit" and lowering an underwater cam.
https://youtu.be/9bVG0e2CMOY (https://youtu.be/9bVG0e2CMOY)
So far so good; the crane operator need some more exercises and the dive-unit needs to be replaced with a more realistic unit.
Best Regards
Hans
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Hi Hans,
Thanks for updating your project.
The crane system works really well, although probably requires quite a lot of skill from the operator in order to launch and retrieve the submersible.
The mini-cam is an interesting addition to the project.
Kind regards,
Pauli