Model Boat Mayhem
The Shipyard ( Dry Dock ): Builds & Questions => Yachts and Sail => Topic started by: rob on July 20, 2018, 08:54:29 am
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heres a question for the experts.
I know Robbie did a roller reefing genoa set for the Atlantis, but I've never seen one on anything else.
Now that his sorted Koh-I-Noor has been sold, ( with redesigned suit and winged keel) my mate is looking for a genoa set up on something a bit racier.
Has anyone tried/failed/succeeded with such a set up ?
Has it been trialled and deemed a failure for a model ?
Your comments would be greatly appreciated before I spend lots of his money experimenting !
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Hi Rob,
Whilst I have no direct experience of this I was interested in your topic so hit Google - I simply searched on "genoa on model yacht"
Looks like quite a lot if info available
https://www.youtube.com/watch?v=UtlaIHy1sFs
https://www.youtube.com/watch?v=uBkOv2OR-ls
and one closer to home http://www.modelboatmayhem.co.uk/forum/index.php?topic=1685.0
Will be very interested to follow your exploits in this area
C-3PO
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***Topic split***
Roycv flying jib question is now here http://www.modelboatmayhem.co.uk/forum/index.php/topic,61262.0.html
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Thanks C3,
I've had an email back from the makers of the Sprinta RC model from Germany. Prices and specs are typically German, but they do seem to have it sorted. No details to enable anyone to copy their ideas of course other than the mention of a 'computer controlled ' winch.
I would certainly like to play with this one, I'm hoping my customer will go for the £700 option !
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Hi Rob,
http://www.ramoser.de/home_d/sprinta_rc_d/sprinta_rc_d.html (http://www.ramoser.de/home_d/sprinta_rc_d/sprinta_rc_d.html)
That got my attention!!! - what a great looking model.
(http://modelboatmayhemimages.co.uk/images/2018/07/24/SprintaRC002.jpg)
(http://modelboatmayhemimages.co.uk/images/2018/07/24/SprintaRC001.jpg)
Looks like this model has a big following in Europe - I wonder why it's not is the UK or is it?
(http://modelboatmayhemimages.co.uk/images/2018/07/24/SprintRC003.png)
I would love to have any additional info you find - I have hit Google to try and find more details - Search "Sprinta RC" in Google and then hit images tab - loads of pics
Found some video on uTube - Great looking models - I wondered what the boom was @ 1:10 in the video - very thick - wondered if this was some type of furling sail.
https://www.youtube.com/watch?v=gbKAoqc0El8 (https://www.youtube.com/watch?v=gbKAoqc0El8)
Google translate on the video description = "1: 6 model of Sprinta Sport, the Sprinta RC - successful and sustainable class. Standard with Genoa system. www.ramoser.de (http://www.ramoser.de)"
This video description - "original promo video" - https://www.youtube.com/watch?v=05945XVmzeI&t=51s (https://www.youtube.com/watch?v=05945XVmzeI&t=51s)
And this re "Computer Control" - https://www.youtube.com/watch?v=PEBIJrIf4oc (https://www.youtube.com/watch?v=PEBIJrIf4oc)
Other uTube links
https://www.youtube.com/watch?v=efPXs9_z7ek (https://www.youtube.com/watch?v=efPXs9_z7ek)
https://www.youtube.com/watch?v=MXoxGEEZSEk (https://www.youtube.com/watch?v=MXoxGEEZSEk)
https://www.youtube.com/watch?v=SnonRFJrm5Y (https://www.youtube.com/watch?v=SnonRFJrm5Y)
https://www.youtube.com/watch?v=zu4rhCm_I7o (https://www.youtube.com/watch?v=zu4rhCm_I7o)
https://www.youtube.com/watch?v=FklST8Kz1RE (https://www.youtube.com/watch?v=FklST8Kz1RE)
C-3PO
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A very interesting and ingenious sheeting system there.
It looks as if the main sheet goes all the way out and back in again as the Genoa is hauled in on the other tack, doesn't it? Or have I miss-read it?
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The mainsheet is controlled by a separate sail arm servo, as far as I can make out labelled trim servo on the drawing
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Does this help?
Today decided to get into it and start with the sheeting circuit, to help explain the genoa function have posted schematic of the circuit which controls the Genoa and Main from single ring in the circuit which travels from port to starboard off the closed loop circuit running from RMG winch that uses 90 mm drum.
There is a second servo (other being rudder) that is used only for main sheet trimming independent of the Genoa, where you can have few cms trimming adjustment under sail for leaking little when running or pinching close-hauled, it does have small influence on main twist but not much.
As Main & Genoa share same sheeting circuit, TX control is as normal left stick where when centred up & down sheeting is full out for running, stick down is closed hauled port & stick fully up closed hauled starboard. I’ve mixed the main sheet trimming with sheeting stick.
https://www.rcgroups.com/forums/showthread.php?1479438-Sprinta-RC/page2 (https://www.rcgroups.com/forums/showthread.php?1479438-Sprinta-RC/page2)
(http://modelboatmayhemimages.co.uk/images/2018/07/24/Ramoser2.png)
C-3PO
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The mainsheet is controlled by a separate sail arm servo, as far as I can make out labelled trim servo on the drawing
I don't think that's the case, the mainsheet is marked and goes forward of the mast right up to the bow and then back to the genoa traveller. Aft of the mast it goes along the boom and then in a conventional path to horse amidships and is then attached to that trim sheet, which seems to do exactly what it says.
C3PO's second diagram seems to show the same rig in a slightly different fashion too.
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My understanding is that the main winch (RMG in the pic) moves the "Circuit line" - poorly highlighted in blue which adjusts both the Genoa and Main sheet
The other servo/sail winch is just for small tweaks to the main sheet (Yellow Arrow)
(http://modelboatmayhemimages.co.uk/images/2018/07/24/Ramoser3.png)
C-3PO
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Emailed you Jonathon
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Well , I've spoken to my customer/friend this morning
£1169 didn't put him off.
I'm about to email the manufacturer for full and accurate cost, shipped to me.
Impressions and report to be published here soon !
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Waiting for updates and
saving pennies if the result
is good.
Ned
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With a lead time of 6 weeks, we are about to pay the 50% deposit on a pre painted and decorated (steinlager) boat.
Customer relations seem to be very important to Christian Ramoser, the designer and seller of these models. The build delivery and decoration has nearly doubled the initial £1100 price though.
I'm looking forward to getting my hands on this ( out of my price range) boat.
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Slight change of plan on the Sprinta rc.
At double the initial price, a fully built, fully painted and decorated 'steinlager', just add the rx and 2s battery, boat is to be ordered.
I will start a new thread when the boat arrives.
It's not mine but feels like Christmas will come in 6 weeks.
The boat is to be sailed at Hythe club winter series.
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I, for one, look forward to seeing that :-))
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Rob,
Very interesting - Look forward to the updates and your experience with the model - I have my hammer poised over my piggy bank...
C-3PO
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https://www.youtube.com/watch?v=_TzjHOPYQ0Ap
https://www.youtube.com/watch?v=shmu3yQs3do
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Hi Klunk,
Do I remember correctly I think you had issues with the Genoa on the Atlantis.
I have an Atlantis built by Brian Roberts and reviewed in Model Boats Magazine a few years back - but it does not have that option fitted
Another video showing Genoa operation - https://www.youtube.com/watch?v=XEyN0amOUZ8 (https://www.youtube.com/watch?v=XEyN0amOUZ8)
C-3PO
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Hi Klunk,
Do I remember correctly I think you had issues with the Genoa on the Atlantis.
I have an Atlantis built by Brian Roberts and reviewed in Model Boats Magazine a few years back - but it does not have that option fitted
Another video showing Genoa operation - https://www.youtube.com/watch?v=XEyN0amOUZ8 (https://www.youtube.com/watch?v=XEyN0amOUZ8)
C-3PO
no issues. I have the complete Genoa set up for the atlantis including a whirlwind sail winch. mine is still undergoing a r3furb, as it took 2 years to source new 50mm 2 hole stanchions.rigged then with 1mm wire rope. still to do the tunnels, which i have. it's just a long drawn out affair as nothing is simple, and spares are as rare as hens teeth.
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Rob,
Have you taken delivery of this model yet?
C-3PO
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Thanks for the continued interest.
Stage ( 2 off) payments have been made, the latest last week.
Some decoration was added to the order ( there will be nothing for me to do bar adding the 2s battery and installing Rx and putting up the mast)
Shipping is due this week !
Christmas is coming a bit early.
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It ( she) has arrived . . . . .. WOW.
bigger than anticipated, more beautiful and German engineering at its finest !
Pics will follow ( it's still wrapped in cling film ) as soon as the owner has unwrapped it.
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Hi Rob,
This is still on my bucket list - how did she perform?
Regards
C-3PO
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Good afternoon
I've not seen her on the water, but I know my customer is well pleased.
Further to making it even more realistic, I know he has had the foresail changed by Nylet to bring the bottom closer to the deck,and can now reef the sail aswell.i must get in touch with him this week.
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Anymore news on this model? Still going well?
Dan
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Yes indeed offshore.
Model has been changed from 2s to nimh battery for peace of mind and is sailed regularly in the Southampton area.
Owner is well satisfied with it.
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Ah Southampton is not to far away I'm from Portsmouth, I would truly love to see the boat out on the water if possible? I have sent a email to see what the prices are now, I guess it will be about £2k delivered hmm
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This one only went up to 2k due to the decorated sails and hull ( though it was a superb job )
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This one only went up to 2k due to the decorated sails and hull ( though it was a superb job )
That's not to bad then. I only want a white hull with the standard sprinta stickers and in a RTR form with out the charger. Do you still have contact with the company? I have sent a price request but it might be worth going through you if your a broker?
Dan
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I have no connection to the company, other than as a well satisfied customer.
My initial email took a couple of days to be replied to, I think he is very busy with the racing series for the Sprinta models in Germany.
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I have managed to get a Genoa working pretty well on one of Alan Horne's 60" J class models. Just recently launched but seems to work well if you time it right. https://www.youtube.com/watch?v=ne76tS5rnwI (https://www.youtube.com/watch?v=ne76tS5rnwI)