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RL24 MK?
Could someone be so kind and please explain the difference between MK 1, MK 2, and MK 3 for the RL24 Thank you
Helmut Sedlmaier25-Nov-2003    Edit    Delete 
Mark 1
Helmut

The mark 1

A nice lightly laid up hull with no mast post in the cabin. The cockpit had horrible narrow coamings with low side seats (Quarter berths too small in area). No self draining cockpit. The cast swing keel was light on in weight (94 kgs) and low in area. The rudder arrangement was not very effective. The Rl 24 then was very fast and exciting to race in comparison with other TY's at that time. The mark 1 was known to be tippy and made lee way when going to windward. The mast used to pump the cabin top when going to windward in waves.

Mark 2

Was made from a different mould and had a heavier lay up with a wider and heavier cast swing keel (130 kgs). Improved coaming with self draining cockpit. Improved quarter berths.

Mark 3

Built with 100 mm more free board and a heavier again cast swing keel (? kgs). I not sure but some were sold with efficient fibre glass laminar flow drop keels.

The RL24's were bought by many ex dinghy racers and many of the older boats were modified and improved. The class CBH rating went from .710 to .725. Recently the introduction of the bulb to the laminar flow drop keel has taken the drop keeler Victorian CBH rating up to .760!!!

In my opinion the major improvements in boat speed to the Rl's was with the introduction of the following:

The Mike Coxon skiff rig (peelgreen mast)

The Holm Brothers drop blade rudder and their laminar flow drop keels ( 100kgs of lead in the foot).

Doing away with the outboard well.

Fitting a filler and keel lock down behind the swing keel. This was very neccesary if you had a swing keeler and wanted to keep up with the drop keelers. We were all on the same CBH rating then (late 70's or was it the early 80's???).

I reckon the best hull for racing would have to be the Mark 1

I hope this info helps

Alastair


Alastair Russell26-Nov-2003    Edit    Delete 
Rl marks
Lloyd.

Thanks for all the good info.

When I replaced my mark 1 keel with a mark 2 keel in the late 70's i weighed them both on my el cheapo bathroom scales and I came up with 94 and 140 kgs. I am now starting to think maybe that the scales were not accurate as both readings are out by the same amount when compared with your specification. I bought the second hand mark 2 keel from Rob Legg Yachts who I understood had converted a few mark 3s to drop keel.

The mark 2 keel was definataly wider as I had to heighten the centreboard box ( not lengthen). These changes along with the prop under the mast area and a Holme bros rudder improved the handling and performance of my boat substantially.

Alastair

Alastairrussell28-Nov-2003    Edit    Delete 
Marks of RL24's
I have been involved with the RL24 for over 18 years and have sailed on all the different Marks even though I have only owned Mark 4's.

In the late 80's the Victorian Association developed a Boat Show Handout Brochure on the RL24, I scanned the part of it that gave a good but brief diffinition off the types (Marks) of the RL24. Prior to the Mark description there is a brief list giving a number of reasons for owning an RL24 back in the 80's and still relevant today.

Extract - RL24 Handout Brochure

The RL24 has stood the test of time in the highly competitive trailable yacht arena. The RL.24 was first produced in 1975 as a fast, cruising yacht, but quickly made its mark on the racIng scene.

The design concept, which won the Australian Design Award in the seventies, is still relevant in the eighties. Naturally there have been some changes over the years, but the original concept and basic profile remains the same.

YOU WON'T NEED A NEW CAR TO TOW YOUR RL24

The RL24 was originally designed with family cruising (and budget) in mind and the class rules have been developed accordingly.

-With a minimum weight of 750kg the RL can be towed behind the average family car.

-The specially designed single axle, tilt trailer allows the boat to be launched and retreived by one person, in just 300mm of water .

-The simple sail plan and uncomplicated rig make for easy rigging in a short time.

-Class rules restrict the number of sails to 4, which allow those on a tight budget to remain competitive.

-The roomy cabin and large cockpit offer maximum flexibility of layout. The addition of a boom tent increases the "living space" dramatically.

-For those on a bigger budget, the DEVELOPMENT CLASS permits experimentation with new rig designs and exotic, lightweight materials.

-The yacht is self righting with the keel locked down, and will float when filled with water .

EXISTING RL24's COME IN THE FOLLOWING CONFIGURATIONS:

Mark I: Swing keel-lOOkg, High rounded combings, Removable cabin floorboards

Mark 2: Introduced in 1976. Cockpit floor and seats raised giving more room in the quarterberths and self draining cockpit. Aft side decks eliminated, foredeck changed (wider cockpit combings). Full furniture mould, including false floor added Swing keel-150kg.

Mark 3: Introduced 1977. Hull freeboard raised IOOmm increasing internal area. Sink unit (furniture mould) replaced by ice-box unit. Swing keel-180kg.

Mark 4: As for mark 3 but swing keel replaced by foil section drop keel-125kg. Optional furniture mould available.


Lloyd27-Nov-2003    Edit    Delete 
Mks
Helmut. There were many improvements made to the RL24s over their period of manufacture. the easy way to identify the various models is as follows..Mk1 (1972-76)has narrow coamings without non skid, the hull may show a slight chine up forward, and the quater berths are very cramped. Mk2 (1976-80)sported a new updated deck mould with wide flat coamings with non skid on top,the hull was upgraded, the quater berths were dropped down 100mm and the centre board weight was increased to 120 kg but the hull still had low free board. Mk3 (1980 on) A complete make over the most notable feature was an added 100 mm freeboard. Mk4 were factory built boats with drop keels, but otherwise same as Mk3. Note. some Mk1 boats were later fitted with 120kg keels and some were converted to Mk4 configuration as were some Mk2 boats. The rigs on many early boats were modernised so this is not any indication.
Rob28-Nov-2003    Edit    Delete 
RL mark 1
Rob

I have a very slight chine which is not in forward end but in the after part of the part of the hull on my mark 1 RL 24. What does that signify?

On which mark was the the outboard well modified so that an outboard could be tilted?

Regards Alastair


Alastair Russell30-Nov-2003    Edit    Delete 
Mk1
Alastair. Several mould workovers were done on the Mk1 hull mould and I think the aft end was done towards the end of the run, I can not remember when the outboard well was changed.
Rob.1-Dec-2003    Edit    Delete 

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