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Post by zebedee » Mon May 16, 2016 9:12 am

In the spotted boats thread, Peter Yates wrote: Alien 21 project - $3,800 neg. - Buttaba NSW Looks like a sound hull and trailer so may only be a minor project. http://www.gumtree.com.au/s-ad/buttaba/ ... 1112847024
byrdsworth wrote: Doing some research on these boats they seem to have an unstayed mast and no headsail The rig in the add looks to be a double spreader set up ... probably not standard hull looks good ... trailer looks to be overkill to me worth a look I reckon .... to bad it's too far for me Cheers Byrds

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Re: Alien 21

Post by byrdsworth » Tue May 17, 2016 11:18 am

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alien 21 sailboat specs

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Venture 21 Used-boat Review

The vintage macgregor is a good example of a budget-friendly boat..

alien 21 sailboat specs

Maybe this has happened to you: You’re on a country road, driving to a wedding (or family vacation or business conference), and you pass a sailboat on a trailer with a “For Sale” sign. It’s not a big boat. It’s not a small boat. But it’s just about right for launching a small adventure with your young family, or maybe you’re looking to downsize. You can’t resist stopping for a closer look. Incredibly, the sign reads “$600,” including a nearly new trailer and an old 4-horsepower, two-stroke outboard that “runs like a top.” You write down the number and drive away, thinking: “Somebody is giving away a perfectly good boat.”

Chances are that “steal of a deal” is a Roger MacGregor-designed Venture 21, and if not, it’s probably one of the many copycats riding the trailer-sailer boom that MacGregor’s little boat ignited. The Catalina 22, the Santana 21, and the San Juan 21 are just some of the boats that followed closely in the wake of the Venture 21’s introduction.

The concept for the Venture 21 came out of MacGregor’s master’s thesis in the Stanford University MBA program. The first hull was introduced in 1965, but full-fledged production didn’t begin until 1967. Several thousand hulls later, the last MacGregor 21 (the boat was renamed in 1980) rolled off the line in 1986 at the MacGregor factory in Costa Mesa, Calif. Today, with some 36,000 sailboat hulls behind it, the company builds just one boat, the hybrid sailboat/powerboat MacGregor 26x.

Although MacGregor sold fewer Venture 21s than its successor—the Venture 22, which later became the pop-top Venture 22-2—the 21’s easy trailerability and affordable price helped it maintain its popularity throughout the 1970s. Capitalizing on the fiberglass revolution in boatbuilding, MacGregor’s business-school project sparked a pivotal marketing shift that helped bring recreational sailing to mainstream America.

While the trailer-sailer boom is far behind us, the Venture 21 and its many look-alikes have renewed relevance today. With their discretionary spending sharply cut, younger sailors are taking the Craigslist-route into sailing, scouring the classified ads for boats that don’t require dock space but still have room for a family sail. Meanwhile, many owners of 30-plus-footers are considering downsizing to a boat that doesn’t require mooring fees and a hefty maintenance bill each spring. For better or for worse, in the dim light of a recession, a back-to-basics giveaway boat on the roadside begins to look awfully enticing. For these and other reasons, PS decided to take a closer look at the Venture 21, which, in many ways, is the epitome of “the boat with a price I couldn’t refuse.”

The Venture 21 was designed to be affordable, easy to trailer and launch, and fun to sail, with enough room below for storing gear, napping, or even spending a night at anchor. It was principally aimed at new sailors, but it also appealed to those who wanted to step up from an open daysailer. Its size, sail area, and hull design were tailored for lakes and bays with fickle breezes of less than 15 knots.

Seaworthiness and performance were important considerations but pragmatism and aesthetic appeal were the driving force behind its design features.

Although the boat’s low headroom and Spartan interior would not qualify it as a weekender today, it was initially marketed as a “cruising” sailboat. A sleep-aboard sailboat that could be hauled around the country behind the family station wagon seemed perfectly in tune with the wanderlust of the 1960s.

While the Venture 21 is regarded as one of the first modern trailer-sailers, no single design element stands out as particularly revolutionary or unique. Instead, MacGregor incorporated proven features that would not only appeal to serious sailors, but also would remain consistent with the public perception of what a good boat should be and look like. In the yacht market, the Cruising Club of America boats were still the aesthetic model. Carl Alberg’s popular Ensign, launched by Pearson in 1962, is a good example of a small boat that clung to the CCA philosophy and aesthetic.

The Venture’s heritage is more closely aligned with two daysailers that were enjoying a surge of popularity on the East Coast in the early 1960s: the 17-foot Day Sailer, designed by George O’Day and Uffa Fox in 1958, and, to a lesser degree, the Phillip Rhodes-designed Rhodes 19, first offered by O’Day in 1959. Both were built by the nascent O’Day Group of Fall River, Mass. The similarities in the three boats are most apparent above the waterline. All have a relatively flat sheer line and spoon-like bow overhang (or spoonbow), elements that predate the modern yachting era.

While the Rhodes 19 still carries fairly deep V-sections well aft, making it a capable performer in the chop typical of its New England home waters, the Day Sailer flattens out, particularly at the stern, giving it fast, near-planing speeds off the wind. Fox and O’Day later refined this feature, earning Fox a reputation as the innovator of the planing dinghy. With a modest V-shape and a relatively fine bow, the Venture 21 lies somewhere between the two Rhodes 19 and the Day Sailer.

The Venture’s swing keel gives it 5 feet, 6 inches of draft—even more than its popular big brother, the Venture 25—and retracts to allow the boat to float in about 15 inches of water. (The brochure says 12 inches.)

Although the original design called for a fractional rig with a 22-foot mast, this was later changed to a masthead rig, giving it quite a bit of horsepower for its era. At the peak of its production in the late 1970s, the Venture 21 enjoyed popularity as a racing boat, with fleets springing up on the Gulf Coast, the Great Lakes, and the Northeast, as well as its home waters of Southern California. Although some owners have gone to the trouble of re-routing running rigging, fairing the keel, adding travelers and vangs, and replacing the pinned turnbuckles with threaded turnbuckles, we’d encourage someone inclined toward performance to look at a more modern hull with an active racing fleet.

One of the most notable features is the boat’s 7-foot cockpit, as big as that found in the much larger and heavier Catalina 22. However, unlike the Catalina 22, the San Juan 21, and the successively longer Ventures (V-22, V-23, V-25) that widened the cabintop to provide more interior space, the Venture 21 preserves enough sidedeck for crew to move forward . . . with care. Many V-21s, like the one we sailed, never had lifelines; others have had their lifelines removed. The standard single lifelines—low and poorly supported by widely spaced stanchions—offer a modicum of safety, but these are still less than ideal. In our view, lifelines are not a deal-breaker on a 21-foot daysailer, but if you have small children, a boat that is equipped with lifelines with a supporting pushpit and pulpit would be preferable.

The cockpit has a small lazarette, presumably to store fuel for the small bracket-mounted outboard, but this leads directly to the bilge, a bad idea that presents a potential fire risk. The original boats came equipped with top-grinding winches with short T-tracks for the jib. The boat we sailed had only a single fixed-point for the jib sheet. The end-of-boom mainsheet has a 4:1 purchase that spreads the load to each corner of the stern, a basic setup that limits trim options. Some owners modified the leads and added a mainsheet traveler, although this entails either raising the traveler over the tiller, or moving the sheet forward on the boom; both are compromise solutions.

A modest 18- by 18-inch fiberglass bow hatch allows ventilation down below, as well as a place for sails to be passed down. There is no anchor locker or chain pipe. The boat we sailed had an 8-inch diameter screw-on PVC deck plate that was apparently used as a chain pipe.

Overall, the deck has a functional layout, fine for its primary mission, which is to enjoy some time on the water with very little hassle.

Accommodations

The biggest drawback to the Venture 21’s emphasis on trailerability and a 1960s aesthetic is the lack of headroom below. By keeping the cabintop and topsides profile low, MacGregor produced a boat that, in our view, is better looking than the slab-sided models that followed. However, the end result is a very cramped interior. The VW-camper-inspired pop-top on the Venture 22-2, which came shortly after the Venture 21, offered a compromise that was adopted by a number of boats in this size range. Gradually, the intrinsic appeal of a low profile gave way to market demands. (MacGregor’s current and only model, the M26x, is a classic example of the wedding cake look that eschews traditional aesthetics for the sake of comfort below.)

With two quarter berths and a V-berth, the Venture 21 technically could sleep four, but this sort of arrangement probably would be brief and acrimonious. Although you could pack a lot of gear under the cockpit, actual locker storage is limited. Some ambitious owners have added sinks, small galleys, 12-volt systems, and port-a-potties below, but the boat’s cramped headroom restricts its suitability for more than a few days of cruising. For the 20-something adventurer with aspirations of camp-cruising on one of America’s many inland lakes, it will do just fine, but more than a couple of days aboard a boat this size will be a sure test of any marriage.

Construction

During the Venture 21’s 15-year production run, from 1965-1980, the materials and construction methods used for its deck, rig, structural components, and keel went through several changes. Construction of the hull itself, however, remained virtually unchanged. The hull was hand laid up with woven roven and mat. The layup schedule was a single unit of alternating mat and woven roven. Owners do report flexing in some spots, although we noted none on the boat we tested. The early boats are fairly resin rich, so hull thickness is not necessarily a reflection of strength.

The earliest Ventures had a stick-built interior, with bulkheads and bunks made of resin-coated cuts of plywood that were laminated in place. These earlier versions make it easier for owners to modify or rebuild an interior, and this is almost an inevitable project, given plywood’s propensity to rot and delaminate.

By the mid-1970s, MacGregor switched to a molded liner, which accelerated production and eliminated issues of rot, but added about 200 pounds to the total weight. Large sections of the boat are enclosed and filled with foam—a touted safety feature—but it is nonsense to consider the boat unsinkable, as some websites and blog posts suggest.

About 50 V-21s featured lead keels. The poured lead was anchored to a steel beam, and the entire construction sheathed in fiberglass. This process was not only expensive, but it also presented significant corrosion problems, as water eventually migrated into the fiberglass-encased keel.

Most models have solid iron keels; corrosion, however, is still a problem with these keels, but they can be removed, ground-down, faired, and sealed with an epoxy barrier coat to provide many more years of service. This is the biggest “problem” with the Venture 21, and any buyer should take a close look at the keel and the related components.

The original deck was plywood core, but this was later changed to balsa. In either case, rot is a potential problem (particularly in areas of the owner-installed deck hardware), but none of the 14 owners of Venture 21s who participated in our survey reported significant problems with deck rot.

The hull-to-deck joint was initially a bolted and adhesive-bonded shoebox joint, in which the lip of the deck flange fits over the hull just like a shoebox lid. This was later modified to an outward turning flange joint, with the hull lip turning outward to present a horizontal bonding surface for the deck. In both cases, the joint was bonded with a polyurethane adhesive sealant such as 3M 5200, bolted together, and then covered with an extruded aluminum and vinyl rubrail. Neither joint is as rugged as an inward-turning flange, but this is method is typical for a boat of this size.

Early versions of the Venture 21 were fractional rigs, but the majority were masthead rigs with overlapping jibs. An off-center backstay and upper and lower shrouds add support to the 22-foot mast. Early boats, like the 1969 model that we test sailed, did not have spreaders on the upper shrouds. In windy areas, where mast pumping is a noticeable problem, retrofitting spreaders—or looking for a more suitable boat—would be a good idea. The chainplates are through-bolted to the hull, eliminating the typically rot-prone attachment to plywood bulkheads found in some larger boats of this vintage. The original turnbuckles are the fixed-adjustment type that allow 1/8-inch adjustment intervals, making it hard to tune the rig at sea, but impossible to over-tighten, a common novice error.

The two biggest problems cited in our owners’ survey were the hand-crank keel winch and the keel-retaining bolt. Although the keel winches on later MacGregor models are braked mechanisms that will not spin freely under load, the one on the Venture 21 is a common ratchet-type trailer winch. If it is let go under load, the handle can whip around dangerously. Many owners have replaced this with a braked winch—a good idea, although these winches will require more maintenance. The keel-retaining bolt is a 3/8-inch diameter bolt that is slipped through a hole in the centerboard trunk and a corresponding hole in the keel. It is used to lock the keel in place when sailing in deep water, preventing the keel from flopping back into the hull should the boat capsize or surf down the face of a wave. The retaining bolts are commonly bent during a grounding, and any boat with a bent one should be inspected closely around the hull and keel trunk for other signs of damage.

Overall, the construction is light, but adequate for the boat’s designed purposes. If the deck isn’t too rotten, and the swing keel and keel box aren’t shot, most any other potential problem on the Venture 21 is easily remedied by someone who is handy and has the time.

Performance

During its heyday, the Venture 21 was promoted for it speed. MacGregor touted its position as the first of the “hot retracting keel boats” and the “fastest of its type,” with “planing speeds at over 16 miles per hour.” In this age of ultra-light monohulls and multihulls with eye-popping sail area (see PS, September 2009 and May 2010), this sort of hype seems quaint, but if you compare the Venture 21 to other boats of its era, it is clearly no slouch (See “Venture 21 in Context,” page 11). Its sail area/displacement ratio puts it ahead of several contenders, and its hull form—as mentioned—does give it an ability to hit double-digit speeds in the right hands.

The boat we test sailed was handicapped by ancient sails and an outboard that could not be fully tilted out of the water. Although the boat had a masthead rig, the headsail was a fractional working jib. A 140-percent genoa, found on many boats, would have added about 25 percent to the total sail area. To windward, the boat tacked smartly through 90 degrees, although we’d expect a boat with good sails to point higher. The boat was initially tender on the wind, but once the full effect of the 400-pound keel exerted its influence, the boat settled into a comfortable heel. Despite the deep bellies in her sails, the boat handled gusts surprisingly well, and by adjusting the swing keel’s depth, testers could easily achieve a balanced helm. Off the wind in 12 to 15 knots of breeze, we were able to sustain speeds of 7 knots under working sails alone with the keel almost fully retracted. While not wind-in-your hair sailing by today’s standards, it meets our definition of fun.

Conclusions

After spending some time aboard the Venture 21, we were reminded how much and how little has changed since the boat was introduced more than 40 years ago. Most comparable modern “weekenders” with big cockpits and modest cabins, like the Precision 21 or Catalina Capris 22, offer much more in terms of safety, systems (limited as they are), and modern conveniences. And entry-level daysailers like the thermo-molded Hunter 216 offer more in terms of performance options, such as a sprit for the asymmetrical sail and rigging conveniences like a hydraulic lifting keel. If true small-boat performance with a potential for one-design racing is what you’re after, then a boat like the J/22 presents a more sensible choice.

While overall construction quality has improved over the past 40 years, most daysailer hulls (the Hunter 216 and the balsa-cored J/22 excepted) are still solid fiberglass and laid up by hand, an economical and forgiving method. Many daysailers with cabins are actually much heavier than the lightly built V-21, but they also have much better finish quality.

The bottom line with the Venture 21 is the bottom line. If you hunt around long enough, you are likely to pick up a sailaway boat with a trailer and outboard for less than $3,000­—about the cost of a new trailer. The boat we sailed sold for far less, including the trailer and 4-horsepower Evinrude. If you are really patient, you can probably find a fixer-upper that someone will give to if you promise to drag it off their property.

Is this 40-year-old, mass-produced boat still a viable option for the entry-level sailor, or someone looking to downsize? No question about it. The Venture 21 is not a boat we’d recommend for someone with offshore aspirations or in places like San Francisco Bay where heavy air and a stiff chop would render it wet, slow, and uncomfortable. However, if you plan some coastal or lake adventures and are limited by a 2,000-pound tow capacity and a recession-era budget, then the Venture 21 definitely deserves a look.

There is one key caveat: Because it is easy to underestimate the amount of work required to revive barn-found boat, we would strongly urge looking for a Venture 21 that is in sailaway condition, rather than a project boat. Dealing with the iron keel alone can be a time-consuming project, and despite the boat’s interesting history, this adds little or no to resale value. On the good side, however, should you decide to embark on the restoration of a Venture 21, you will not be alone. Plenty have done it before, and given the boat’s irresistibly low price tag, more will surely follow in their wake.

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What kind of Trailer did your boat have. Mine (1972) is a 4″ welded C Channel, Is this a factory style trailer or somebody’s back yard built. It has the right v notches for the C/B etc.

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Ocean Craft 21

Ocean Craft 21 is a 20 ′ 11 ″ / 6.4 m monohull sailboat starting in 1975.

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)

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Precision 21 Sailboat Review

Are you a sailing enthusiast looking for the perfect sailboat to enhance your on-the-water experiences? Look no further than the Precision 21 sailboat. In this comprehensive review, we’ll dive into the features, performance, and overall value of this popular vessel.

Table of Contents

Overview of the Precision 21 Sailboat

The Precision 21 is a versatile and well-designed sailboat that is ideal for both beginners and experienced sailors. With its thoughtful construction and excellent sailing characteristics, it has garnered a strong reputation in the sailing community.

Features and Benefits

The Precision 21 sailboat boasts a range of features that contribute to its appeal and performance on the water.

1. Spacious Cockpit

The cockpit is intelligently designed to provide ample space for the crew while maintaining comfort and functionality. Whether you’re enjoying a leisurely cruise or engaging in some spirited racing, the ergonomic layout of the cockpit ensures an enjoyable experience for everyone on board.

2. Performance-oriented Design

With its moderate sail area, generous beam, and efficient hull design, the Precision 21 offers impressive performance characteristics. Whether you’re chasing the wind or navigating tight quarters, this sailboat responds with agility and grace.

3. Comfortable Cabin

Below deck, the Precision 21 boasts a surprisingly spacious and well-appointed cabin. With comfortable seating, ample storage, and a well-equipped galley, it’s the perfect retreat after a day of sailing.

4. Easy Trailering And Launching

Thanks to its manageable size and weight, the Precision 21 is a breeze to trailer and launch. This makes it an excellent option for sailors who want the flexibility to explore a variety of sailing destinations without being tied to a single marina.

Performance and Handling

When it comes to performance and handling, the Precision 21 excels in numerous aspects:

  • Stable and predictable sailing characteristics, ideal for sailors of all experience levels
  • Efficient upwind performance, allowing for effective tacking and upwind progress
  • Responsive helm and balanced feel, providing confidence and control in varying wind conditions
  • Easy to single-hand, making it a versatile and accessible option for solo sailors

Precision 21 Sailboat Review

Credit: precisionboatworks.com

Value and Affordability

One of the standout aspects of the Precision 21 sailboat is its exceptional value and affordability. Despite offering premium features and performance, it remains accessible to a wide range of sailors, including those who are entering the sailing world for the first time.

Additionally, the overall construction and build quality of the Precision 21 ensure that it is a lasting investment, providing years of enjoyment on the water without significant ongoing expenses.

Frequently Asked Questions For Precision 21 Sailboat Review

What are the key features of the precision 21 sailboat.

The Precision 21 Sailboat features a spacious cockpit, a comfortable cabin, and excellent sailing performance.

How Is The Performance Of The Precision 21 Sailboat In Different Weather Conditions?

The Precision 21 Sailboat offers good performance in various weather conditions, providing a stable and enjoyable sailing experience.

What Makes The Precision 21 Sailboat Suitable For Beginners?

The easy handling and stability make the Precision 21 Sailboat an ideal choice for those new to sailing.

Can The Precision 21 Sailboat Be Used For Single-handed Sailing?

Yes, the design of the Precision 21 Sailboat allows for single-handed sailing with ease and convenience.

The Precision 21 sailboat stands as a testament to thoughtful design, impressive performance, and exceptional value. Whether you’re a seasoned sailor seeking a spirited and capable vessel or a novice looking to embark on your sailing adventures, the Precision 21 is a compelling choice worth considering.

With its versatile nature, comfortable accommodations, and strong sailing capabilities, it has earned its place as a beloved sailboat among enthusiasts. Consider the Precision 21 for your next sailing escapade, and discover the joy of cruising the waterways in a vessel that perfectly balances performance, comfort, and affordability.

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The Santana 21 is a 21.25ft fractional sloop designed by Seymour Paul and built in fiberglass by Schock W.D. between 1969 and 1976.

879 units have been built..

The Santana 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.

Santana 21 sailboat under sail

Santana 21 for sale elsewhere on the web:

alien 21 sailboat specs

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Sailboat specifications

  • Last update: 25th April 2020

RS 21's main features

  • 2019: SAIL magazine - Best Performance Boat under 30ft
  • 2019: Sailing World - Boat of the Year: Best Keelboat

RS 21's main dimensions

Rs 21's rig and sails, rs 21's performances, rs 21's auxiliary engine, rs 21's accommodations and layout.

RS Sailing RS 21  Picture extracted from the commercial documentation © RS Sailing

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IMAGES

  1. 1987 Australia America Alien 21 sailboat for sale in Alaska

    alien 21 sailboat specs

  2. 1987 Australia America Alien 21

    alien 21 sailboat specs

  3. 1987 America Alien 21

    alien 21 sailboat specs

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    alien 21 sailboat specs

  5. 1987 Australia America Alien 21 sailboat for sale in Alaska

    alien 21 sailboat specs

  6. 1987 Australia America Alien 21 sailboat for sale in Alaska

    alien 21 sailboat specs

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  6. "Флагманский лайнер": эксперт озвучил преимущества самолёта МС-21 с новыми двигателями

COMMENTS

  1. INTERNATIONAL 21

    A boat with a BN of 1.6 or greater is a boat that will be reefed often in offshore cruising. Derek Harvey, "Multihulls for Cruising and Racing", International Marine, Camden, Maine, 1991, states that a BN of 1 is generally accepted as the dividing line between so-called slow and fast multihulls.

  2. Alien 21 sailboat

    The Alien 21 is a great looker under sail. She moves well in moderate and heavey air, with spinnaker up the boat screams. the Alien 21. A rare boat indeed Sailboat: Alien 21 catboat, looks like an Ultimate 20. The unstayed mast is rigged for spinnaker and headsail for light air. Boat comes with 2 spinnakers, one headsail, and main.

  3. SailboatData.com

    SailboatData.com …is a database that contains information on over 9000 production and semi-production sailboats dating back to the late 1800's. COMPARE BOATS. To compare up to three boats at one time, click the (+) Remove a compared boat by clicking (-) FORUM.

  4. 1987 Australia America Alien 21 sailboat for sale in Alaska

    Alaska. $9,000. Description: Originally built in Australia, this Alien 21 is a really fun boat. This boat is designed as a "cat boat", meaning the mast is positioned forward with only a single mainsail to control. -Solid fiberglass. -Two mainsails (see photos). Loose footed Quantum full batten squarehead mainsail made of Technora Black Fiber ...

  5. Alien 21

    Mar 15, 2007. #3. already been a lot of talk about this one in an earlier thread, particularly about the claimed fleets in Sydney which don't exist. Yes claimed speed is BS, not unless that the boat is a wild turbo job with a Carbon hull, carrying a VO70 rig with a canting keel (or something to that effect) C.

  6. 1987 Australia America Alien 21

    Specs; Contact; Photos; Description; Specs; Contact; Seller's Description. Originally built in Australia, this Alien 21 is a really fun boat. This boat is designed as a "cat boat", meaning the mast is positioned forward with only a single mainsail to control.-Solid fiberglass -Two mainsails (see photos). Loose footed Quantum full batten ...

  7. Alien 21

    And there's a conventional rig Alien 21 at Mordialloc Motor Yacht Club: A man's boat is his Castle. The Gippsland Lakes are my moat. Castle 650 #10, Roller Coaster. Top. byrdsworth Able Skipper ... ↳ Location Reviews & Boat Storage; ↳ VICTORIAN Ramp and Location Reviews; ↳ NSW Ramp and Location Reviews;

  8. Venture 21 Used-boat Review

    Today, with some 36,000 sailboat hulls behind it, the company builds just one boat, the hybrid sailboat/powerboat MacGregor 26x. Although MacGregor sold fewer Venture 21s than its successor—the Venture 22, which later became the pop-top Venture 22-2—the 21's easy trailerability and affordable price helped it maintain its popularity ...

  9. Cal 21

    Cal 21 is a 20′ 6″ / 6.3 m monohull sailboat designed by C. William Lapworth and built by Bangor Punta Corp. and Jensen Marine/Cal Boats between 1969 and 1972. ... 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. Formula. D/L = (D ÷ 2240) ÷ (0.01 x LWL)³

  10. Swarbrick 21 $10500

    TRAILER SAILER $10,500. INVENTORY. 1990 Swarbrick design, 'ALIEN'. 21 ft trailer sailer. Outboard - 6 hp, 4 stroke Mercury. Fibreglass hull recoated, also coated with renew. Electric keel, antifoul professionally done. New 6mm safety lines, 2 new Gel batteries. Professional rigged, new shrouds, new deck cleats.

  11. Ocean Craft 21

    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. Formula. 16.03. <20: lightweight racing boat. 20-30: coastal cruiser. 30-40: moderate bluewater cruising boat. 40-50: heavy bluewater boat.

  12. Cal 21

    The Cal 21 is a 20.5ft fractional sloop designed by C. William Lapworth and built in fiberglass by Jensen Marine/Cal Boats between 1969 and 1972. 500 units have been built. The Cal 21 is a light sailboat which is a very high performer. It is reasonably stable / stiff and has a low righting capability if capsized. It is best suited as a day-boat.

  13. Precision 21 Sailboat Review

    Overview of the Precision 21 Sailboat. The Precision 21 is a versatile and well-designed sailboat that is ideal for both beginners and experienced sailors. With its thoughtful construction and excellent sailing characteristics, it has garnered a strong reputation in the sailing community. Specifications. Details. Length Overall. 20 feet 10 inches.

  14. Bay hen 21

    The Bay hen 21 is a 21.0ft gaff head cat designed by Reuben Trane and built in fiberglass by Sovereign Yachts (Custom Fiberglass Products) since 1984. The Bay hen 21 is an ultralight sailboat which is a very high performer. It is reasonably stable / stiff and has a low righting capability if capsized. It is best suited as a racing boat.

  15. FREEDOM 21

    40 to 50 indicates a heavy bluewater boat; over 50 indicates an extremely heavy bluewater boat. Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam^1.33), where displacement is expressed in pounds, and length is expressed in feet. Capsize Screening Formula (CSF): Designed to determine if a boat has blue water capability.

  16. Santana 21

    The Santana 21 is a 21.25ft fractional sloop designed by Seymour Paul and built in fiberglass by Schock W.D. between 1969 and 1976. 879 units have been built. The Santana 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.

  17. Hobie Cat 21

    Sailboat specifications. The Hobie Cat 21 is a 21'4" (6.48m) double handed sport/beach catamaran designed by Hobie Cat Design Office (United States) and John Wake (United States). She was built between 1987 and 1990 by Hobie Cat (United States). The SE version comes with the basic equipment needed to start sailing.

  18. RS 21

    40 to 50 indicates a heavy bluewater boat; over 50 indicates an extremely heavy bluewater boat. Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam^1.33), where displacement is expressed in pounds, and length is expressed in feet. Capsize Screening Formula (CSF): Designed to determine if a boat has blue water capability.

  19. PDF SWITCH CRUISE 21

    CAPACITY 21′˚170 21′˚230 Maximum Person Capacity (US) 10 10 Maximum Person Capacity (Canada) 9 9 Maximum Load Capacity 1,485 lb/675 kg Fuel Capacity 29 gal/110 L Total Storage Capacity 221.1 gal/ 840.6 L 243.2 gal/ 920.6 L ROTAX® ENGINE 21′˚170 21′˚230 Engine 1630 ACETM 170 ECT 1630 ACE 230 ECT Horsepower 170 hp 230 hp

  20. RS 21

    Sailboat specifications. The RS 21 is a 20'10" (6.34m) multiple crew sport keel boat designed by Jo Richards (United Kingdom) and RS Sailing (United Kingdom). She is built since 2018 by RS Sailing (United Kingdom). The Race version comes as standard with better hardware allowing more possibilities to trim sails.

  21. SIRIUS 21/22 (CAN)

    The SIRIUS 21/22 is said to be the first North American production-built, ballasted cruising boat with positive flotation. In a more expensive procedure, closed-cell foam was injected into some compartments, then into the gap between the inner and outer hull the full length and up to the deck level. In the early 1980s, the hull was modified to ...

  22. BAY HEN 21

    40 to 50 indicates a heavy bluewater boat; over 50 indicates an extremely heavy bluewater boat. Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam^1.33), where displacement is expressed in pounds, and length is expressed in feet. Capsize Screening Formula (CSF): Designed to determine if a boat has blue water capability.

  23. AQUARIUS 21

    40 to 50 indicates a heavy bluewater boat; over 50 indicates an extremely heavy bluewater boat. Comfort ratio = D ÷ (.65 x (.7 LWL + .3 LOA) x Beam^1.33), where displacement is expressed in pounds, and length is expressed in feet. Capsize Screening Formula (CSF): Designed to determine if a boat has blue water capability.