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Question

Dear Doctor L,

Many thanks for your last piece of wisdom, we have looked and discussed the various options and we feel that to enhance our fleet we will get some Oppies for the novices. We will then look at Picos for the more experienced and we will use the GP14s/Skipper and Wayfarer for groups doing instruction. I will also look at racing my GP14 on Sundays.

As our youngsters progress though we are looking at the faster racing boats so that the more experienced sailors can race at the top National Youth Level. Our youngsters have seen the Blaze and the mighty Moth win numerous races and although they are aware, that there is no substitute for the experience of both of the sailors who win the races, they would like to feel that the boats that they are racing will equal the two boats mentioned.

Could you let us know which boat they could compete in at National Youth and whilst giving the Blaze and Moth a run for their money?

As always we look forward to the Doctors wisdom.

Kind Regards,

Steven Brown

Group Sea Scout Leader


The Boat Doctor's reply -


Steven and rapidly improving youth squad,

My advice would be don't worry too much about the boat yet, concentrate on getting the best out of what you have. The Topaz can win races if sailed well and up to its handicap rating! The skills are developing, but wind awareness, boat handling and racecraft are easier to learn without fighting a powerful boat. Once competent the move into a faster machine will be much easier and effective. We are seeing some good racing develop between the lads on the water and a determination to finish despite mistakes and gear failures, its all part of the fun. The RYA youth squad use Laser radials and standard Lasers, 420s and 29ers which give very tight one-design racing in a very competitive environment. Thats serious commitment by youth and parents to ultimately try for the olympics. Not everyone has to go that way though, there are many other exciting classes to sail at club and national level.
Both Waggy and I learnt our skills in Moths many years ago. We both were fairly competent and experienced before attempting Mothing and spent many months swimming, but the steep learning curve levels off eventually and you become much more aware of what makes the boat go. That awareness and quick reaction makes sailing anything else easy. Only last year Waggy was neck and neck with me on the water in his Streaker, which proves that on a small lake its not the speed of the boat that matters as much as the way its sailed.

Soon it will be time for me to issue the "Moth Challenge". I have one candidate in mind, (mutterings about the moth handicap is asking for it) if he brings his wetsuit on a suitable day!

Regards The Boat Doctor

Question

Dear Doctor,

First and foremost I would like to thank everyone at Greensforge for the warm welcome and hospitality that has been shown to the Wheaton Aston Sea Scouts.

Over the last few Saturdays and Sundays we have used the clubs three Topaz, a Skipper, a Wayfarer and a Mirror dinghy at the club. We also have three GP14 boats to bring down. Given that we work with young people aged 6 to 18 years of age and we have novice to slightly experienced sailors our group are hoping to get other boats to enhance our fleet. Can you suggest four boats that would help with the varying age groups and with the varying skills of our young people?

We have discussed this at length with other Groups and Clubs but would welcome your opinion!

Kind Regards
Steven Brown
Wheaton Aston Sea Scouts

 

The Boat Doctor's Reply
Hi Steven,

No, but I can help you mend whatever you choose!

Seriously though, its a difficult choice, and we had the same dilemma with the club boats. The ideal boats for our water aren't the easiest to train in or maintain, so its more a case of what you can keep easily to do the job.

Only one I can be sure of - for very youngsters, Optimist is the best. Safe and manageable on and off the water, easy to rig, almost impossible to capsize. My Dad built one for me when I was 5 and it got me hooked. The RYA have a trailer of 6 Oppies you may be able to borrow to try out.

At the other end of the scale, your Wayfarer and GPs are great for an adult instructor with a couple of large trainees.

Its the middle range thats difficult, Oppies are too slow, big boats need an adult, and thats no fun, they need something they can sail themselves, single or 2 up with something to do for both. The Topaz is what we decided on as a package for club boats because the rig can be altered for many uses and the hull is indestructable, so less work for the bosun. Experienced sailors have reservations about their stiffness and lack of seating etc but I guess we're just too old to appreciate the fun factor! The most important thing is do the kids enjoy sailing them? So my advice for this group is ask the kids what they want, and let them try out as many boats as possible before committing your funds.

Hope this helps
 
Boat Doctor

 

Question


Dear Boat Doctor,

I am using our winter break to renovate by wooden phantom, having expended much elbow grease to strip the whole ting to bear wood, do you have recommendations regarding coats to be applied i.e. preservers, primers etc before varnish and hull paint?

Many thanks
Phantom Renovator


The Boat Doctor's Reply

Dear Phantom Renovator,
 
You've done well to get it back to bare wood, thats a lot of area!
Having stripped and hopefully sanded back to wood you may need to fill some dings and hollows to get a good smooth surface. You can use car filler for this but I would advise spending a bit more on epoxy filler as it will not absorb moisture and sticks better. If you have used SP epoxy for repairs etc then add some microballoons to make a lightweight filler. Be careful to colour match the filler if it has to be used under varnish (best avoided anyway). Marine epoxy filler is also available if you don't have SP eg: http://www.purplemarine.com/Product.aspx?ProductCode=184775.
I'm using Purplemarine links here but other suppliers are available!
 
Primer coats, 
Epoxy coating (SP106) is always best, provided the wood is clean sanded and dry. For a new boat or new panels definitely worth the expense because it soaks in and strengthens the ply, but limited effect on used wood because there is usually some old paint in the grain. Universal Clear Primer may be a better option as it is thin enough to soak in and provides a good bond for the paint or varnish. http://www.purplemarine.com/Product.aspx?ProductCode=YPA600%2f375
 
Paints,
The colour makes a big difference here. Reds and yellows in modern paints tend to be see-through and need more coats to cover blemishes. Build up the surface with matching undercoat (mix some topcoat in to get nearer the colour), flatting between layers and don't attempt topcoat until its perfect. Other colours still need undercoat but will cover better.
Brightside is a good value polyurethane finish. http://www.purplemarine.com/Product.aspx?ProductCode=YDB003. If the colour range is not to taste then there are other manufacturers, even some DIY shops, offering similar products.
Toplac is an even  tougher more glossy and longer lasting paint.  http://www.purplemarine.com/Product.aspx?ProductCode=YKF684%2f750 a bit more expensive and better colour range.
 
Varnish,
For most purposes use International Goldspar.  http://www.purplemarine.com/Product.aspx?ProductCode=YVA213 Its polyurethane so tough and gives a good finish, and its not too expensive. Don't bother with cheap DIY shop yacht varnish. From bare it takes at least 4 good coats to even begin to protect properly. A really good finish can take 10-12 thin coats.
 
For winter painting and varnishing, get it warm. Not easy to do in a domestic garage, but maybe worth taking time to draughtproof and insulate then hire some heaters. Warm the paint by sitting the tins in hot water beforehand. Decant into clean tins if thinning down.
 
look forward to seeing your pristine phantom soon
 

Boat Doctor

Question


Dear boat doctor,

How much of an effect can tuning my rig have on the performance of the boat?

How does one 'tune' the rig and the required information be obtained from?

Yours sincerely

An improving racer



The Boat Doctor's reply


Dear improving racer,

The answer of course is it depends! on how near or far from the ideal settings your rig happens to be. Some rig settings can have a big effect on performance. Mast rake for instance will greatly effect the pointing ability.
Achieving the ideal settings for your boat /rig/helm combination is important to get the best out of what you have but its only part of the story when it comes to winning races. On a small water like ours its possible to gain or lose more on a single windshift than by minor changes in the rig. However if you know the boat is set up right then you can concentrate more on making it go.

How to Tune it

I prefer to think about tuning the boat rather than just the rig. Sailmakers like to take the glory for winning and will happily quote all their measurements and settings but they sell their shiny new sails to customers with shiny new boats so the basics are often taken for granted.

The hull plays a large part in getting you round the course as efficiently as possible and hopefully keeping your feet dry. Water is heavy and if its inside the boat it will slow you down so fix the leaks. Check buoyancy tanks, centreboard case, self bailers, bungs and hatches and look for split joints or damage. Drain the boat between races if it does leak a bit until you can get it sorted.

Rudder and Centreboard (foils) are a large proportion of the underwater surface area. They should be as smooth as possible and held rigidly in use. Chunks missing from leading or trailing edges will cause turbulence and vibration even at low speed Sloppy rudder fittings can allow the steering to wander and lose feel, even breaking or falling off in heavy winds when there is more strain. In most classes the leading edge of foil should be vertical when fully down, better for pointing and lighter steering.

Attachment points should be strong and secure. Shroud plates, rudder fittings, mainsheet, jib fairleads etc should be bolted to something solid. Toe straps likewise unless you happen to like swimming. Bear in mind that older boats were not built to take the extreme rig tension often used by modern rigs so be careful not to pull too hard!

Pulley systems and control lines need to work smoothly and efficiently. Spend some money on ball-bearing blocks where there is high load such as kicker and mainsheet. Make sure ropes and cleats are suitable for the jobs. If you have to use both hands to operate something or the spinnaker always gets caught on a thingy - sort it out!

OK now we can progress to the fun bit, tape measures at the ready. Best place to start is your class association. Many have recommendations for basic setups, photos of controls and systems used on leading boats etc. Find out from the results of championships etc who the common sailmakers or builders are then contact them to get the latest information. Many sailmakers now publish tuning guides on their websites for the classes they are involved with so its easy to download, print out and keep in your toolbox.

For the Phantom i found a guide on Pinnel and Bax sails:

http://www.pinbax.com/docs/Phantom%20table.pdf there is also a more detailed description - http://www.pinbax.com/docs/Phantom%20Tuning%20By%20Simon%20Childs.pdf
and for many other classes:
http://www.pinbax.com/index.asp?selection=Tuning%20Guides

Starting with the notes at the bottom of guide, set the mast step position measuring from the transom to aft face of mast. Set the spreader length and angles as per diagram, then step the mast and measure the rake. Attach a long tape measure to the main halyard so that when hoisted it sits at black band. (upper limit for height of sail on mast) Measure and set rake with forestay or jib halyard tensioned as it will alter the measurement. Mark the position of shroud adjusters and rig tensioner for each windstrength setting, make a note of positions on your chart (eg shrouds 2 holes up at 22'2") in case marks get rubbed off on boat. It may be necessary to change adjusters or shorten wires to achieve some settings if its way out.

Of course if your sails are not up to date P&Bs there will be some differences in the settings such as outhall but if you generally follow the recommendations or consult a few other guides and take an average it won't be far wrong.

Remember these are basic settings, a guide to get the rig to perform consistantly and some tips on how to de-power in heavy winds. Once youv'e learned the tricks, throw the book away and learn from the boat itself. Its easy to get obsessed by the numbers, then instead of the excuse for a bad race being "oh its not tuned" it becomes "I went out on the wrong settings!"

Happy Tuning
The Boat Doctor

 

 

 

 

 
 

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