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Pringle’ (US1m) Prototype Launch / Including March Report


John Taylor
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A few weeks ago, saw the launch of ‘Pringle’ (US1m) at Fleetwood. This 3D printed prototype yacht is our entry into this development class and a rare site within the UK. ‘Pringle’, is not to be confused to an International One Meter (IOM), although the yacht has an overall hull length of 1000mm / 39.37 inches, the design has a reduced displacement of 2.75kgs, which is the average weight for this class. ‘Pringle’ employs 4 carbon rigs with the maximum sail area of >387096+ mm* or >600+ sq/inches. Therefore, the whole concept is a lot different in comparison to the IOM. The US1m class is normally only seen within America and Canada, but ‘Pringle’ represent our latest design within our expanding portfolio, which includes entries to specialised development classes across the Atlantic.

The timely launch of ‘Pringle’ came as the news broke from across the Atlantic, the difficult decision was announced, due to the Corona-virus pandemic to cancel the Sacramento Sail Week, which included the class championships with ‘Pringle’ set to compete in the regatta.

As we have a further 12 months of development time, we will take the opportunity to modify further Pringle’s rig and deck layout. I hope to visit Wickham Park, Florida in early January 2021, to test sail this prototype in front of the local class skippers. Should the test be successful, we will produce the first carbon version after returning to the UK and in preparation for the class championships in 2021.

Class Rules https://www.theamya.org/boats/us1m/US1M_Rules.pdf

 

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Edited by John Taylor
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It was nice to read about the launch of John’s new boat.   During the lockdown I had the idea to build a US one metre.   I was fortunate to get a carbon hull made from an American plug.  The boat was launched last week and went extremely well.   It weighs in at 2.6 kg with 1.6 kg of lead.  The physics of this class rule seem ideally suited to our sheltered inland lakes.  I liked the concept of the class ,  it seemed like a mini Marblehead and mine has turned out just so.   The lighter weight makes for much easier launching at my nearest lake where dangling it over a muddy bank is the only way in.    Mine responds very well to our flukey inland winds and is easy to read.   Its ability to carry a relatively tall rig on a light lead was an eye opener.   Like John I’ve gone for shroudless carbon rigs so it’s quick and easy to rig.     The class rules are very simple to work with and straightforward to measure.  Its a class that also takes me back to the days when home building was the norm and now today given the huge progress in materials and construction techniques it’s a rule that still works.    Modern IOMs sometimes have to carry heavy corrector weights to comply with the minimum weight limit which to me seems to defeat the object of starting with a lightweight hull moulding.    I know that this type of restriction is normal for any restricted class but my boat has proved to me what is possible with a smaller development class.   It’ll be nice to hear how John’s boat fares against our American cousins.

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Had the pleasure to sail my IOM in company with Tho's US One Metre recently. Very interesting comparison indeed. 

On the water the expected performance differences, as a consequence of the lighter displacement on the same waterline and rig,  results in predictably distinct pro's and con's which probably equalise overall.  A mixed fleet would be extremely interesting.

The rig is a revelation compared to the IOM and so much easier to set up and transport.  Also cheaper.  The rule is far simpler too with measurement very easy.

Really impressed and seriously tempted to follow suit; literally.

Richard

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Good Afternoon Gents,

Thanks for your correspondence, where are you located Tho? I assumed that my US1m was the only UK based boat. It would be nice to visit you and sail both boats together. After Pringle's launch a few weeks ago it was necessary to alter a few features and adjust the rigs prior to sailing again. I predict we can have my US1m on the water again in 4 weeks from now.  I am located in the Gosport area, but I do travel up and down the country often. It would be a great opportunity to meet in the near future.

 

Regards,

JT

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  • 2 weeks later...

John,

We sailed on Charnworth lake; Loughborough Radio Yacht Club's water. A notoriously fickle water with light/no wind very often. I was sailing  my old, but up dated, Image IOM with an experimental shroudless carbon mast. I am going to "dual rate"the Image as a USOM as another project. The displacement reduction with a 1.6Kg ballast will slightly reduce the WL, but will come onto the 1 metre when heeled anyway. A bit more wetted area / a bit more form stability a bit of fun. The US rule does not appear to ban ballast changing, so when the wind pipes up; use the IOM ballast and fin. Watch the others having to change down. The USOM hull will not carry that much ballast. Downside: light wind performance: maybe.

What are your plans for the US boat ? A real move back to a development class.

Richard

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Richard

Thank you for your comment, the Pringle development has been a 2 year project which involved travelling to the US and sailing these boats. Now I have a prototype US1m of my own, I hope to return to Florida to test sail my boat in January. Once the concept has been proven with other US1m, my intention will be to construct a carbon version of Pringle. 

The plan will be to return to the US later in 2021 for the class championship. Should I achieve a positive result, then the  long term future plan will be to produce my design and make Pringle available for  US class skippers. 

Edited by John Taylor
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  • 1 month later...

This weekend I was a lonely figure on the Gosport Lake as trials continue with my new US1m design 'Pringle'. Weather conditions were ideal to have a look at my top rig for the first time since the yacht's launch in August. These light wind conditions are predicted to be the appropriate scenario when I eventually race in the US. Therefore, I took the opportunity to see how my rig and yacht would perform. Obviously, I cannot compare my design to other boats but after an hour of sailing, 'Pringle' seemed to skip through the water nicely, as well as naturally pointing to windward when there was some weight in the wind. Overall I am happy with the successful trials this year and I await the opportunity now to compete in the US in 2021.

JT

 

'Pringle' Short Film Link: 

 

Pringle (US1m) Nov-2020..jpg

Pringle (US1m) Nov-2020.jpg

Pringle (US1m) Nov 2020.jpg

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  • 4 months later...

Today I took the opportunity to complete 'Pringle's' final trial on the water. Taking full advantage of the weather conditions, whilst testing out the boat using its storm rig.

The rig configuration is shroudless, with a high modulus carbon mast and pocket luff sails.  For those skippers who may have read my previous post within the IOM page, it is the US1m class which is dedicated to the invention of carbon hulls and rigs. Therefore, there is no point in skippers who try and push for drastic changes to the IOM Class rules.

I think now we can move forward by producing the full carbon version of 'Pringle', with some minor alterations we are still hopeful to race in this years Championship at Sacramento in September.

JT

Some video footage and pictures showing Pringle (US1m). 

 

 

 

 

 

 

Pringle (US1m) (1).JPG

Pringle (US1m) (2).JPG

Pringle (US1m) (3).JPG

Edited by John Taylor
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  • 2 weeks later...

Hi again John,

Just re visiting your US 1M having noticed that you have changed to shroudless and therefore forestalled my question.

Worth pointing out to potential new class members; that the sail area you quoted is just the triangle area and that a substantial free roach area is up for grabs. My target for my dual rated project boat seems to be 525600 sq mm which is approaching the IOM sail area. (rough calc only)

This small difference may be what made the initial sailing in the company of a US 1M so close when balanced with the reduced displacement and wetted area.

I really like your pocket main and would be interested to hear how you configured the pocket. I have resorted to multiple tabs on any test sails I have made; sort of works but not ideal. Also are you using a built up mast to obtain a nice luff curve and still maintain a consistent wing effect at the training edge ?

Fully understand if any of this forms a "trade secret" but I am always experimenting with these fundamentals, often with surprising effects.

Richard

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Richard

Thanks for your correspondence, to answer your question. 

Studying the class rules and having conversations with the US skippers who sail these boats on a regular basis, I gradually formed an understanding of the how my boat and rigs should be configured. The class rules largely supports development with only a small number of limits to be aware of.  When it came to designing my US1m package, I took advantage of the development aspect of what was possible. I soon became inspired by using the best ideas from different classes when producing Pringle. For example, my hull and deck configuration is of the same theme as for an IOM. However, my rigs are constructed using ideas from the Marblehead Class.  Using pocket luff sails on stiff shroudless carbon rigs, purpose built for the boat should maximise sailing performance, whilst not forgetting to have the ability of changing your rig easily at the lakeside. 

There are no trade secrets, for me it was an opportunity to use the best ideas from 2 other classes and incorporating previous lessons learnt into my US1m. The only thing now is to wait until we are allowed to travel again, so I may have the opportunity to race against these guys and find out if I have produced a competitive boat?

JT

Short Video Link:  https://youtu.be/GAuCEUV6PJ0

 

 

 

Pringle 2021 (1).jpg

Pringle 2021 (3).jpg

Pringle Rigs.JPG

Edited by John Taylor
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  • 1 year later...

(Fleetwood Club sailing abroad)

It has been a 3 year long wait but this week I finally tested my prototype US1m 'Pringle', against others here at Wickham Park, Florida. The Space Coast club members here have all made me feel welcome.

Due to the temperature of nearly 90 degrees we could only sail for part of the morning. In the small fleet of 6 boats I managed 2nd place overall, but that was enough evidence to determine that I have a competitive design and a project worth pursuing. Moving forward, I will now compete in the class championships with my 3D printed prototype at Long Beach, California in August. Hopefully in 2023, we will finalise the hull shape and build the carbon version of 'Pringle'.

I want to thank the guys of the Space Coast Model Sailing club for their warm welcome. Its been great fun and I look forward to my next visit sometime soon.

 

Space Coast Club Members and me.jpg

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