The Optimist builders guide from CKD Boats cc

The builders guide was developed as we built the first kit we made.  Finding that the plans are not really exactly correct we changed the first build as we found the mistakes. None of the changes are in the guide, the way we would like you to build our kit is.

These three sets of manuals will soon be packed with a three kit order and shipped to a sailing school in the USA with three of our Optimist kits 

The top set are the ten pages of plans, also four pages of the measurement rules.

The lower set is our fourteen page builders guide, it tells you and shows you what to do in the  next step .

Roy

Hillman Imp bronze valve guides

Now made in South Africa and fitted with an oil control seal.

Click on the image to enlarge it.

In stock now, postage world wide, contact me for pricing.

The valve is an Imp Sport inlet valve, the guides will fit all Imp sized valves.

Roy

How to bleed a Perkins 4108 marine diesel engine ?

The owners manual gives a good account of the process and really that should be all you require?

Bleeding is the term used to remove air from the high pressure side of a diesel engines high pressure injection pipes, as with air in the system the diesel will not flow and the engine will not run.

The picture shows the engine and in the lower left hand corner is the diesel oil filter, start by opening the top fitting and pumping diesel through with the diesel pumps finger lever, when no air is seen you can close the vent plug off.

There is a catch though, the pictures shown in the manual are without the exhaust manifold and a mass of related pipes and fittings.

This spare Perkins 4108 engine has the exhaust manifold removed and for that reason the bleed screws or bolts are more accessable and easier to see.

The picture below shows the actual vents you need to open.

Look for the three spanners, which are two 5/16" and one 1/2" in size. In practice you will only require one of each size.

Click on the images to enlarge them.

The system should be vented by opening the lower bleed plug first, pump with the finger lever untill there is no sign of air, leave the plug open then move onto the top plug, vent that too until there is no air, leave that one open also.

Then open the nut to the fitting on the right, there will be a pipe exiting there, when no air escapes open the nuts at the base of the four injectors.

Next move the engine throttle control to fully open, with the key crank the engine until diesel comes out of the four injector pipes and with no air.

Then close all the open unions up and the engine is ready for starting.

The manual does not show you what the vent plugs look like when removed, this picture is the upper plug.

This upper fitting is actually a spring loaded piston valve, cracking off the lower 1/2 " nut did not achieve a result. After removal of this spare set of bleed bolts,  I could better understand why?

In practice you will only need to slacken the smaller top bolt to bleed the air out, the bottom one is the one lying loose, it goes into the top of the main fitting and then compresses the spring we can see.

You Do Not Remove The Entire Assembly!  as that was done so that I could better explain what is inside the unit.

Note, you may have to use a 7/16" spanner to hold the center nut in place as you loosen the upper plug with a 5/16" spanner, ring spanners are better than the open spanners for this work.

This is the lower vent plug, check the flat side, that allows the air to vent out when the plug is opened.

All of the above pictures were taken with a Canon G12 digital camera set to Auto.

The Perkins 4104 marine engine shown is due for a full rebuild in 2016, new liners, pistons, crank bearings etc, it has a brand new cylinder head, contact me for pricing.

Roy

The inside of a wood / epoxy composite yacht

The boat will be some sixteen years old next month, it was possibly the first yacht launched in the Cape Town area in the year 2000.

The design is a Dix 43, the first such yacht to be crafted in a wood / epoxy manner, as the picture shows even sixteen years on the application and finish is good.

Click on the picture for a larger image.

The veneers used were in a flexible sheet form in teak and white ash.

The yacht is for sale, contact me for a Word document with details of the boat.

Roy

Dragon Boat class paddles

As with most sports equipment is closely controled and the Dragon Boat Racing class is no different.

We  ( means me) have made hundreds of such paddles, working with a genuine one sent in from Hong Kong and the measurements page.

Recently the last of the original Old Mutual sponsered  paddles have been spruced up and sold at a good price.

There are just two more left, they need some TLC and repairs but once fixed and primed coated in a twin pack paint they will be good to go again.

Any more would need to be made from scratch and at todays pricing.

Roy

What size should the Wood / Epoxy Optimist Mast Step be?

Try as I might and as yet I have not found those measurements.

Please check the picture.

The yellow drawing is one of about ten we will supply you with our fourteen page builders guide.

This plan shows the mast step details.

The so called unoficial builders guide supplied by the Optimist Asscociation, lists various sizes of meranti that the builder will require, we supply as per that list, excepting the mast step.

That is to be supplied as a meranti block 100mm x 60mm x 180mm from which your supposed to cut the mast step from?

That is a large chunk of wood and I doubt the average home builder will have a band saw large enough to deep cut down the 100mm size (4") ?

The other thing is that no where in the plans is the mast step size detailed, no dimensions at all on the actual meranti block itself.

We worked it out according to the other dimension rules and always supply a pre cut (laminated) mast step with each kit we sell.

There are three in the picture above as we are preparing a three kit set order for shipping to a sailing school in the USA.

Regards

Roy

British Seagull outboard restoration

This is as much a hobby as a paying event, mind you the work is very involved and having the old parts re machined and plated does take time and money.

These parts are from an engine around fifty seven years old now.

Just knowing where to take the parts is a story all on its own, the miles traveled are soon stacked up.

They will re assemble to look more or less like the engine in the picture below.

I have at least three more to do, one will be for sale.

Roy

Packing Optimist dinghy kits for America

I say kits as this is a three boat order and it is going to a sailing school in the USA.

The idea is ( a good one ) to have the kids build their own boats, then learn to sail on them when complete.

We are supplying the  plywood base kit, the meranti wood, builders jig ( for free ) epoxies and related consumables, North Sails and Harken deck gear.

With the exchange rate right now buying from South Africa has never been more attractive.

http://www.ckdboats.com/optimist.html

Contact me for pricing.

Roy