sr max 21 sailboat

The Sr 21 is a 21.08ft fractional sloop designed by Glenn Henderson and built in fiberglass by C&C Yachts since 1992.

The Sr 21 is a light sailboat which is a very high performer. It is stable / stiff and has a low righting capability if capsized. It is best suited as a day-boat.

Sr 21 for sale elsewhere on the web:

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Engineering:C&C SR 21

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The C&C SR 21 is a Canadian racing sailboat that was designed by Glenn Henderson and first built in 1992. It was introduced under the name SR MAX . [1] [2] [3]

• 1 Production
• 4 References

The design was built by C&C Yachts starting in 1992, but it is now out of production. [1] [3] [4]

The SR 21 is a racing keelboat , built predominantly of fibreglass. It has a fractional sloop rig, a raked stem, an open reverse transom, an internally-mounted spade-type rudder controlled by a tiller and a lifting fin keel . It displaces 1,380 lb (626 kg) and carries 439 lb (199 kg) of ballast. [1] [3]

The boat has a draft of 4.50 ft (1.37 m) with the lifting keel extended and 0.92 ft (0.28 m) with it retracted, allowing ground transportation on a trailer . [1] [3]

The boat may be fitted with a small outboard motor for docking and maneuvering. [1] [3]

The design has a PHRF racing average handicap of 165 with a high of 174 and low of 159. It has a hull speed of 5.69 kn (10.54 km/h). [3] [5]

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Related development

• C&C SR 25
• C&C SR 27
• C&C SR 33

Similar sailboats

• ↑ 1.0 1.1 1.2 1.3 1.4 Browning, Randy (2018). "SR 21 sailboat specifications and details" . sailboatdata.com . https://sailboatdata.com/sailboat/sr-21 . Retrieved 2 October 2018 .  
• ↑ McArthur, Bruce (2022). "Glenn Henderson" . sailboatdata.com . https://sailboatdata.com/designer/henderson-glenn . Retrieved 3 April 2022 .  
• ↑ 3.0 3.1 3.2 3.3 3.4 3.5 Sea Time Tech, LLC (2022). "SR 21" . sailboat.guide . https://sailboat.guide/cc/sr-21 .  
• ↑ McArthur, Bruce (2022). "C&C Yachts" . sailboatdata.com . https://sailboatdata.com/builder/cc-yachts . Retrieved 3 April 2022 .  
• ↑ InterVisionSoft LLC (2018). "Sailboat Specifications for SR 21" . Sailing Joy . http://www.sailingjoy.com/sailboat_specs/sailboat_specs/view/79/sr-21 . Retrieved 2 October 2018 .   [ yes|permanent dead link|dead link}} ]
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1993 SR Max 21', by C and C yachts

• Description

Seller's Description

Go to Sailing Texas classifieds for current sailboats for sale SR Max 21’, by C and C yachts, 1993 Boat is race ready needing nothing. Very nice bunk style trailer included, safe for cross country. Nice Keel lifter.

UK Carbon main, Dacron main, Uk Carbon 155%, heavy number one, blade, 2 kites one Sobstad used in two regattas. New Yamaha 2.5 less than 5 hours.

Lots of extras, very well cared for,

clean title/registration PHRF 163 Indian harbour Beach Florida east of Melbourne on east coast, $9000.00 for package boat, trailer, motor.

Rig and Sails

Auxilary power, accomodations, calculations.

The theoretical maximum speed that a displacement hull can move efficiently through the water is determined by it's waterline length and displacement. It may be unable to reach this speed if the boat is underpowered or heavily loaded, though it may exceed this speed given enough power. Read more.

Classic hull speed formula:

Hull Speed = 1.34 x √LWL

Max Speed/Length ratio = 8.26 ÷ Displacement/Length ratio .311 Hull Speed = Max Speed/Length ratio x √LWL

Sail Area / Displacement Ratio

A measure of the power of the sails relative to the weight of the boat. The higher the number, the higher the performance, but the harder the boat will be to handle. This ratio is a "non-dimensional" value that facilitates comparisons between boats of different types and sizes. Read more.

SA/D = SA ÷ (D ÷ 64) 2/3

• SA : Sail area in square feet, derived by adding the mainsail area to 100% of the foretriangle area (the lateral area above the deck between the mast and the forestay).
• D : Displacement in pounds.

Ballast / Displacement Ratio

A measure of the stability of a boat's hull that suggests how well a monohull will stand up to its sails. The ballast displacement ratio indicates how much of the weight of a boat is placed for maximum stability against capsizing and is an indicator of stiffness and resistance to capsize.

Ballast / Displacement * 100

Displacement / Length Ratio

A measure of the weight of the boat relative to it's length at the waterline. The higher a boat’s D/L ratio, the more easily it will carry a load and the more comfortable its motion will be. The lower a boat's ratio is, the less power it takes to drive the boat to its nominal hull speed or beyond. Read more.

D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

• D: Displacement of the boat in pounds.
• LWL: Waterline length in feet

Comfort Ratio

This ratio assess how quickly and abruptly a boat’s hull reacts to waves in a significant seaway, these being the elements of a boat’s motion most likely to cause seasickness. Read more.

Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam 1.33 )

• D: Displacement of the boat in pounds
• LOA: Length overall in feet
• Beam: Width of boat at the widest point in feet

Capsize Screening Formula

This formula attempts to indicate whether a given boat might be too wide and light to readily right itself after being overturned in extreme conditions. Read more.

CSV = Beam ÷ ³√(D / 64)

First introduced as SR MAX.

This listing is presented by SailingTexas.com . Visit their website for more information or to contact the seller.

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any opinions on the sr max 21 for river/lake day sailing? thanks in advance ciscojoe  

I sailed quit a bit on an sr33 maybe 10 years ago. Thought it was a fun and fast boat. Sailed through some challenging conditions. Did well for what it is. If i were in the market for a cool/fun/fast 20-24 footer, i would consider the max for sure. I knew a guy who sailed one pretty successfully out of St Pete. But, i have not seen him in 4/5 years. I think they have an owners site on the web. they do and here it is: SR MAX Class hope this helps  

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Let's Get to Know Each Other

Let's connect, why it's important to partner with a designer on your sr 21 max sail.

The design is the most critical part of your new sail. Ensuring the sail fits and performs its best is a must for our crew. The Precision Sails Design team are experts at their craft. Unlike other sail lofts all of our sailors work one-on-one with a designer to perfect their Sr 21 Max sail.

No Two Sr 21 Max Sails Are Alike

There are many factors that affect the performance and design of your sails. Location, sailing experience, and weather conditions all come into play when picking the perfect sail. Two mainsails made for two Sr 21 Max’s in California and Florida will have different designs, sailcloth, and options based on what is best for the sailor.

Taking measurements is easy. All sailors work alongside our measurement team to measure and confirm their rig specs. This helps ensure your design is flawless and allows us to extend our Perfect Fit Guarantee to all of our sailors.

Discover the best cloth for your sailing needs, our sail details, or more about how Precision Sails is leading the sail-making industry with innovative new practices.

Proudly offering the largest selection of sailcloth in the industry, our team is always available to help you find your perfect sail. Whether you're a weekend sailor, coastal cruiser, or club racer our team is ready to walk you through the process.

Types of Sails

Precision Sail Loft specializes in producing headsails, mainsails, spinnakers, gennakers, and code zeros. So no matter the type of sail you’re looking for, we can help. Our sails are trusted by cruisers and racers alike from around the globe. Review the sail options and craftsmanship available to customize your dream sail.

Build & Process

Every sail we craft is produced to the highest standards with the best hardware, craftsmanship, and skill-set in the industry. Pair that with Precision Sails' approach to communication and your sailboat will be ready to set sail before you know it.

Unparalleled Commitment To Helping Sailors

As experts in design, communication, and production our team is ready to take on the task of making sails for your boat. Give us a call to get started.

“ I just received my asymmetrical spinnaker, with sock and turtle bag, along with a new 135 Genoa. The entire process was simple and both sales and the design team were in regular contact if there were any questions. The customer portal was easy to use and lets you keep track of where in the process your sails are. Great sails, great service -Graham Edwards (Facebook)

“ The whole team at Precision Sails was fantastic from start to finish. We’ve had a laminate main and genoa made so far and have a spinnaker on the way. They listened carefully to our needs and recommended a great sail cloth. We couldn’t have gotten more bang for our buck! -Noah Regelous (Google)

“ We received our spinnaker and launched it yesterday and I just wanted to let you know how pleased we are with it. The service we received from your company was exceptional and the quality of your product is second to none. We will certainly be return customers in the next few months to replace our main and jib sails and will recommend your company to all our sailing buddies. Once again-thank you.” -Daniel Jackson (Google)

“ we had good communication during the planning stages and the knowledgeable people at precision sails really got me fixed up good! The sails look and work fabulous! my boat sails better than it ever had! couldn’t be more pleased with the product AND the service!” -Fred Jelich (Facebook)

“ Our new furling jib for a Corsair 27 Had to be specially designed due to the height of the furler, but this was accomplished quickly and in short order we had our sail which fits beautifully and has a great shape. It’s everything we could have wanted, high tech design, thoughtfully executed and affordable.” -Nancy Y. (Yelp)

Request a Sr 21 Max Quote

Looking to buy a new headsail or mainsail for your Sr 21 Max? Request a free quote from Precision Sails for a new custom sail. Our team will work with you to design the perfect sail for you.

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48° North Boat Test

From the May 2019 issue

In 2018, the British small boat specialists, RS Sailing, came to market with a new keelboat that has been generating a lot of excitement; and now it’s come to the Pacific Northwest. By the numbers, it might not seem particularly unique – it is one inch shy of 21’, displaces 1,433 lbs, draws 4’ 6”, and carries its 7’ 3” beam well aft. Yet, after sailing it, there is both a ton to like about the RS 21, and also a lot to distinguish it from its competitors.

The intent from RS Sailing was not to create the fastest 21’ sport boat in the world. In fact, much of the design intent is built around a different priority, and an RS rep told me they aren’t even calling this a sport boat. The RS 21 aims to be quick to plane and a blast to sail, while emphasizing simplicity in its systems, design, and sailing experience; all of which put it squarely in the conversation for the best available club racer and training platform. Sport boat enthusiasts might have noted that the displacement seems a tad on the heavy side for a sport boat of this size. This can be at least partly explained by the choice to endow the boat with 730 lbs of ballast. That better-than-50% ballast-to-displacement ratio clearly fits the design ethos.

The boat has a distinct and eye-catching appearance, sleek and low-slung, somewhat reminiscent of an RS Aero on steroids. I liked it from the jump. Its chamfered bow design and hard chines maximize waterline and denote modernity. Unlike nearly all of its competitors, it is an open-boat design; meaning there’s no cabin or doghouse of any kind. The boat actually is all cockpit. Forgoing what would be a tiny interior anyway means that there’s a much greater sense of space for the crew and more real estate for ergonomic rigging. There’s still a water-tight hatch in the bow that offers a surprisingly generous amount of storage for crew bags, lunch, and your beverage of choice.

The structure of the one design class is taking shape and will be inviting. The boat will be sailed with three or four, and there’s no legs out hiking allowed, making it comfortable compared to some sportier alternatives. There are restrictions on sail purchases, sail cloth usage, and professional sailor involvement, meaning an effort is being made to keep the cost of racing the boat fairly low.

I got to go sailing on the RS 21 on a puffy April day in Richmond, CA. Seeing no outboard on the transom, I assumed we would be sailing off the dock, but then Jake Sorosky, the sales rep for West Coast Sailing (the regional RS dealer) in Washington State stepped to the middle of the cockpit, released a line that was keeping the electric Torqueedo of the water, and asked me, “You want to drive us out?” This innovation is a clever solution to the auxiliary power problem on small sport boats; anyone who has ever done the contortions to stow an outboard down below will appreciate the set-it-and-forget-it ease.

We began sailing inside the harbor in flat water with wind affected by geography and some massive commercial traffic, and mystery puffs and lulls from seemingly every direction. Driving and trimming main, I had to stay on my toes but found it easy to keep the boat on its feet. After a while, I fought my instincts and started letting the big lifting puffs heel the boat without easing. We even tried powering-up in the puffs, inducing excess heel while close-hauled to see if we could lose the rudder. We couldn’t. This kind of sailing is neither comfortable nor fast, but such stability and drive-ability boggles the mind. One word that RS uses to describe the 21 is forgiving, and this is definitely accurate.

Sailing beyond the breakwater into 15-20+ knots of breeze against San Francisco Bay tide, I was aware of the boat’s relatively low freeboard. It tracked beautifully and stayed pleasant to drive, but digging a wave didn’t just slow the boat, it sent a bit of water through cockpit. Careful driving minimized this tendency. The boat seemed to like backstay and the jib, which has athwartships-adjusting leads, could be sheeted hard and still gave great shape and a well-proportioned slot.

Upwind or down, it’s a combination of hull form and foil shape, in addition to the ballast, that makes it eminently drivable. This puts the RS 21 in stark contrast to some of its closest competitors, boats that may be faster and more powered up, but that require much more nuance of tune and trim to drive easily.

You might think all of this stability and ease makes the boat feel slow. Hardly! It was just about as easy to get on a plane as any keelboat I’ve sailed, and declaratively easier than some. It never felt heavy to me, but rather stiff and stable. We weren’t using any instruments, but on an easy plane, I’d guess we were happily cruising along in the low double-digits, pushing into the low teens in the puffs.

Of all the features, the one that gets the double-edged-sword award, in my opinion, is the mid-cockpit pedestal that doubles as a housing for the Torqueedo and the bar for the mainsheet attachment point (there is no mainsheet traveler). The backstay adjustment is also here, as is the double-ended main sheet that may be trimmed from forward or aft of this pedestal.

It has numerous positive attributes. Sheeting the main from an aft and above-the-deck position means that the boom can be trimmed to nearly centerline. Keeping the lifting motor there retains the full range of tiller-motion at the transom and keeps the weight better centered. It’s an easy foot push for the crew seated nearby. And finally, the arch in the middle is an exciting asset as a hand-hold for sailors who struggle with balance or mobility. A recent J/70 world champion installed something somewhat similar to aid him in getting from one side of the boat to the other, and this pedestal could do the same for RS 21 sailors.

The potential downside of this element is that it really is in the middle of everything. On jibes, in particular, we had a couple issues in which the extra main sheet would get caught on parts of this pedestal. There will surely be a learning curve for someone regularly sailing the boat, and it’s far from an insurmountable challenge.

Considering these unique attributes, who is the RS 21 really for? It will be a great first boat for anyone entering sport boat sailing, whether they’re adults getting into it or kids coming out of high school or college racing. Because of its simple and user-friendly approach, I think it will be a popular choice among sail training programs and clubs that provide race boats for fleet or match racing. And, among the boats of similar design, I would call the RS 21 the easiest to day sail, either short handed or with an inexperienced crew. So with this in mind, a fair answer to the question above could genuinely be: everybody.

Joe Cline has been the Managing Editor of 48° North since 2014. From his career to his volunteer leadership in the marine industry, from racing sailboats large and small to his discovery of Pacific Northwest cruising —Joe is as sail-smitten as they come. Joe and his wife, Kaylin, welcomed a baby girl to their family in December 2021, and he is enjoying fatherhood while still finding time to sail, make music, and tip back a tasty IPA every now and again.

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