sirius 21 sailboat data

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Sirius 21/22

Sirius 21/22 is a 20 ′ 11 ″ / 6.4 m monohull sailboat designed by Hubert Vandestadt and built by Vandestadt and McGruer Ltd. between 1977 and 1987.

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)

Vandestadt & McGruer was the Canadian importer of the American built MacGregor line of trailerable sailboats in early 1970s. The company also built the SIREN 17. 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 include a reverse sheer transom at which point the boat was renamed the SIRIUS 22. A fixed-keel model was also offered.

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Sirius 2122 can

The sirius 2122 can is a 21.0ft masthead sloop designed by vandestadt and built in fiberglass by vandestadt and mcgruer ltd. (can) between 1977 and 1987., 500 units have been built..

The Sirius 2122 can is a light sailboat which is a high performer. It is stable / stiff and has a low righting capability if capsized. It is best suited as a racing boat.

Sirius 2122 can for sale elsewhere on the web:

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Specifications SIRIUS 21/22 (CAN)

1977 - 21.00 ft / 6.40 m - Vandestadt - Vandestadt and McGruer Ltd.

SIRIUS 21/22 (CAN) Sailboat Data

Hull Type: Swing Keel Rigging Type: Masthead Sloop LOA: 21.00 ft / 6.40 m LWL: 18.75 ft / 5.72 m S.A. (reported): 205.00 ft² / 19.05 m² Beam: 7.92 ft / 2.41 m Displacement: 2,000.00 lb / 907 kg Ballast: 525.00 lb / 238 kg Max Draft: 5.00 ft / 1.52 m Min Draft: 1.33 ft / 0.41 m Construction: FG Ballast Type: Iron First Built: 1977 Last Built: 1987 # Built: 500 Builder: Vandestadt and McGruer Ltd. Designer: Vandestadt

Information from  sailboatdata.com .

Hull Speed: 5.80 kn

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Sirius 21/22 - Sailboat Data, Parts & Rigging

Sailboat data, rig dimensions and recommended sail areas for Sirius 21/22 sailboat. Tech info about rigging, halyards, sheets, mainsail covers and more.

Sailboat Data directory for over 8,000 sailboat designs and manufacturers. Direct access to halyards lengths, recommended sail areas, mainsail cover styles, standing rigging fittings, and lots more for all cruising and racing sailboats.

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Sirius 21 with Pop Top cabin, on trailer

Price: $7,500, location: perth, ontario..

General Information

Make of Vessel: Sirius 21

Manufacturer: Vandestadt and McGruer Ltd.

Designer:  Vandestadt

Hull Discription: Fiberglass

Engine: 7.7 HP Honda with charging coil

Builders Dimensions

Builder’s LOA: 21  feet

Builder’s Beam: 7  feet 9 inches

Builder’s draught: 5  feet

Rig Type:  Masthead Sloop

Disp: 2000 Lbs.

Ballast: 525 Lbs.

Found on Board

Sails - main sail, jib and genoa (current rigged for furling). 

Pop top cabin enclosure

Depth Sounder: Standard Communicatoin Horizon.

YHF Marine Radio: Ray Jefferson model 5000M

TV Box: Platinum (Recieves colour tv signals and play through Acer monitor).

AM/FM/DVD/DIVX/MP4 Stereo: Innotovatek.

Lights located fore and aft, navigation lights

Fire extinguisher

Marine chemical toilet with pump out

Manual water pump

Retractable galley table which turns into a double bed. V-berth sleeping for two adults. Port side with quarter berth. 

Trailer is a dual axes cumstom, with electronic brakes and extendable tougue for easy maneuvering. 

Privateer Yacht Sales offers the details of this vessel in good faith but cannot guarantee or warrant the accuracy of this information nor warrant the condition of the vessel. A buyer should instruct his agents, or his surveyors, to investigate such details as the buyer desires validated. This vessel is offered subject to prior sale, price change, or withdrawal without notice

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Brigantine Inc/Canadian Tallship Expeditions and the Sail Training Vessel, St Lawrence II participated in all the Canada 150 Tall ship port events on the Great Lakes and Maritimes in 2017. During 2018 to present, we have operated in the Great Lake and upper Gulf of St. Lawrence with trainees from across Canada. This included a number of youths from Nunavut and the Yukon Territories. If you have a son, daughter or grandchild interested in a life changing tallship experience, with an Brigantineintroduction to a professional marine career log into www.brigantine.ca to book a berth for 2024 to sail Newfoundland and Labrador waters and visit the French Islands of St Pierre and Miquelon.  Visit us at Portsmouth Olympic Harbour  join the fun.     Brigantine Inc. founded 1954 ,is the oldest contineous traditional sail training program in the western hemisphere. 

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new sailboater just bought a Sirius 21

• Thread starter old salt new sailboater
• Start date Aug 17, 2015
• Brand-Specific Forums
• Sirius 21/22

old salt new sailboater

Hello, not very computer literate either, retired last month, got a bug to be on Lake Erie here in Northeast Ohio after living on the Lake since 1981 ! (I'm into cars and didn't have money or time to do both). looked at sailboats for sale. then googled the namebrands and for specs. Like the Sirius and got one TODAY ! 1981 in storage for about 10 years. Great looking hull, the swingkeel looks terrible ! great title forum topics. Will use those wood 'blocks' raise the boat and pull out trailer, lightly sand blast swingkeel and paint. SO... i'll google swingkeel, what is made of ? steel, casing? with lead? ALso: got it for great price, but of course needs a main sail. Needs outboard engine too.. ughh those are expensive, any recommendation on Horsepower 5 or 8 ? I'll read every post and check it out. Guess I got to take a 'sailboat course ! lol. Got a launch place in Madison Ohio just a mile away from my Lake house. I need an 'anchor' also. Figured I'd just motor around until I get the hang of 'sailing' ! Any info is appreciated !  

Congratulations on your boat purchase and welcome to sailing! The keel is solid cast iron so sandblast away. As far as a motor size 5 HP will be fine just make sure it is a long shaft. Lower motor weight is important in these Sirius 21's because the stern sits down in the water a bit. This issue was fixed with a reverse transom on the later Sirius 22. My first motor was a 1983 Mariner 8 HP two stroke. I had the prop re-pitched to get it up to full rpm as i think it was designed for a higher hull speed. (John boat?) It weighed around 63 lbs and had ridiculous power. A few parts broke on it so last year I bought a 2005 Yamaha 6 HP four stroke. It has plenty of power but it weighs around 90 lbs and is heavy for this boat in my opinion. It is a little scary on the original outboard bracket so an upgrade is in the near future.  

shanester said: Congratulations on your boat purchase and welcome to sailing! The keel is solid cast iron so sandblast away. As far as a motor size 5 HP will be fine just make sure it is a long shaft. Lower motor weight is important in these Sirius 21's because the stern sits down in the water a bit. This issue was fixed with a reverse transom on the later Sirius 22. My first motor was a 1983 Mariner 8 HP two stroke. I had the prop re-pitched to get it up to full rpm as i think it was designed for a higher hull speed. (John boat?) It weighed around 63 lbs and had ridiculous power. A few parts broke on it so last year I bought a 2005 Yamaha 6 HP four stroke. It has plenty of power but it weighs around 90 lbs and is heavy for this boat in my opinion. It is a little scary on the original outboard bracket so an upgrade is in the near future. Click to expand

I would go with the smaller motor say 4-6 hp. We used a 3.5 on our 22 for several years and traveled all over Lake Superior and Lake Huron. We replaced it with a 7.5 which was more than enough. A friend has a 4 hp and we may do a swap as I sure would like the lighter weight. I have used standard shaft length motors but with the different transom on the 22 maybe the the mount is lower or drops down lower.  

srust58 said: I would go with the smaller motor say 4-6 hp. We used a 3.5 on our 22 for several years and traveled all over Lake Superior and Lake Huron. We replaced it with a 7.5 which was more than enough. A friend has a 4 hp and we may do a swap as I sure would like the lighter weight. I have used standard shaft length motors but with the different transom on the 22 maybe the the mount is lower or drops down lower. Click to expand

old salt new sailboater said: Being a novice and reading everything I can, I decided on a 5 hp Honda four stroke, will double check its 'weight'. Hope to order on line and get free delivery. Was kicking around a propone 'motor' versus gas. I bought an emergency generator for my house that runs on either. Hope to go to the local 1 mile away boat launch here in northeast ohio, Madison ohio. They did an upgrade no many years ago. looked at it last night. just to see how it 'floats' and get it off the boat trailer and see if swingkeel lowers. hope it will crank back up ! better oil the winch and cable. THanks for any info ! Click to expand

srust58 said: just remember to lift the keel off the trailer bed just before you back down the ramp so the boat comes off easier and to lower it back down after you load the boat back on the trailer. You don't want the weight carried by the winch when you drive down the road. It can be easy to forget with everything else going on. It's the first thing wife asks when we get into the car to drive away. Is the keel down? Click to expand

Read through the "leaking in the yard" thread as there is discussion and photos about the proper thru hull fitting for the sink. Sounds like you have a gate valve. They are notorious leakers and have no place in the hull of a boat. Post a photo of your mast step and the heel of the mast. Need to see if you have the OEM setup or something that has been modified before offering advice.  

Welcome to sailing and congrats on the Sirius! I love the flexibility of trailering and the shallow draft of Sirius. You've found a great group here that always wanting to help fellow sailors. Your lucky to find that loose cockpit drain. A small leak like that will turn into an unstoppable gusher once it gets below the waterline. And although the Sirius is supposedly unsinkable, none of us want to be the one that demonstrates its neutral buoyancy. I've also had to deal with leaking from the topside. Ultimately, the only way to fix it is to just remove all the through-deck hardware, clean it up. Then remount with plenty of 3M 4200. Never use caulk or silicone on your boat. Go get you some 4200 and 5200. 4200 is the best sealant but can still be scraped out later if needed. 5200 is a strong adhesive sealant, very hard to remove, even years later. I fixed my leaking "ports"(windows) by prying open the rubber gasket, blowing out the trash and moisture, then squirting in some black 4200 on a hot day. No more leaks, my cabin is dry as a bone now. So..those carpeted board thingys, those are trailer bunks. Oh and there are no ropes on a sailboat. Yes they look like ropes, but they are "lines". Study the terminology online, its important for crew to be able to communicate and understand each other. It's usually not hard to find someone who will give sailing lessons on your boat. Call the marinas or look on Craigslist. Your mast step should have a slot in it that the mast slips into. The mast step doesn't support the mast at all. It just holds it in place on the deck. The Shrouds and Stays hold the mast upright and keep it centered. I just did a bottom job on my Sirius, not a fun job. My keel was covered with rusty scabs. I was amazed how easy it just scraped off. I dont think sandblasting would be worth while, unless you want to remove the keel and apply an epoxy barrier coating. Otherwise it's just gonna rust again, so just scrape it and slap some paint on, then go sailing. I say, never leave the dock without your anchor. If your engine fails or rudder breaks, the anchor is the only thing that might keep you from drifting into the rocks or other dangers. Propane on board it not great either, it can accumulate in the cabin and explode or become CO. Learning to sail is best done in 4-9 knots of wind. I found a great app called Windfinder. It shows your areas wind forecast and it's very accurate. I look at it almost everyday. Just to see how many great sailing days get by me. This forum is probably your best resource for sailors helping sailors. Post some pics of your Sirius, we all love pictures.  

Attachments

Need Sirius 21 sailboat info plz OK... got the sail cover unwrapped and its the main sail. Great news. Now, I need a cable that goes from back of boom up to ...what part of main sail or mast. I'm guessing its a cable (or rope) that goes to the top of main sail down to boom. anyone got a 'length' I need. I'm closer. One more info... can I sail in small winds with just a main sail. I don't have a 'jib'. Thanks Going motoring, since I have not mastered, raising and lowering the mast.  

I think I figured it out... sitting in the house.. watching the Sirius 21 video posted by mavic00, with the music AWOLNATION-Sail. I see something coming down from top of mast.. obviously the cable to goes to stern and then another.. blowing more into the wind.. implying possibly a rope.... which I have that has two knots/lopes in it.. which I was using to pull up the mast into place. (Sorry, I have been reading a lot but not using the nautical terms yet. the back of the boom has the clip in it, and i'll guess the rope comes down and clips onto the back of the boom. will have to try it and see if my hunch is right. lol, lol. Would be nice to have a Sirius handbook or manual that details that. Please provide any info as I prepare to learn sailing by going right out into the water ..on a very calm day.. close to sure.. with my brand new 5 HP 4 stroke ready should I need it !... Thanks  

It is called a "topping lift" and prevents the boom from dropping to the deck (and from hitting you in the head) when the mainsail is not hoisted. The sail when hoisted will support the boom and then the topping lift should be a tad slack so it does not interfere with the shape of the sail. I think mine is 1/4" diameter dacron (low stretch line made for halyards).I recommend you find an experienced sailor in your area to help you out with the boat setup and getting sailing. Without a headsail (jib) most sloops (boats with one mast and fore and aft sails) wont sail to weather (closer to upwind than down wind) very well. It will add to your frustration of learning to sail. A used jib should be somewhat easy to find as they do not need to be as "fitted" as a main.  

thanks very much for the info on the boom. Hope to go out this morning with the outboard for just a little while to get use to the sailboat. Will keep working on practice raising and lowering the mast. Ok.. time to find a jib sail, any places recommended. I read about 'unfurler' type of gizmo ? seen in the youtube video too. thanks for the patience as I learn and duck around the Honey Do list playing with the boat ! Got to tackle the electrical on the boat next. A friend gave me a 4 year old marine battery. Wonder how long those new lithium ion type of recharge drill motor batteries last if i'm only using it for the mast and deck lights? Much lighter than carry a heavy marine battery aboard. I see in the video's those solar panels on the stern.  

You do not need a furler for the jib. It is mostly for convenience although some people may argue that it is a safety item. My boat has never had one. Make sure you purchase a "hank on sail". The "hanks" are clip things that allow the jib to be raised and lowered while being attached to the forestay. You will need to measure the length of forestay and subtract at least a foot for the luff length. The length of the foot and leech are not as critical but can change the sailing characteristics of the boat. I can't recommend a place to buy used sails but just search for them on the internet. Also I want to make sure you realize that when stepping (raising) the mast all shrouds and the backstay are connected. Only the forestay and baby stay are not connected until the mast is in position. The first time you do this two or three people are recommended. Once the forestay and baby stay are attached then the turnbuckles can be adjusted. Make them somewhat tight but not too tight. You will figure it out eventually. After the boat is launched you may find some of them have tightened or loosened a bit because of hull flexing. When unstepping the mast you would just loosen and remove the forestay and the baby stay. The others would stay connected and already be adjusted for the next time. (they will need periodic adjustment though) The capacity of a deep cycle battery vs a drill battery is probably over a hundred times. Using a drill battery might work if you used a 14.4 Volt and switched out the incandescent bulbs for LEDs. My 12V Bosch batteries are really 10.8V for some reason. Also the old wiring may have a lot of resistance so even with the LEDs the drill battery may not last long at all.  

Thanks very much, I really appreciate any info. Had the boat out this morning at NE Ohio, Lake Erie, very calm day... got to 'motor' around get use to launching and loading the boat back on the trailer... had a heck of time getting it lined back up on the trailer after 1/2 hour messing around, finally got it lined well on trailer. Yes.. I figured out watch a youtube video and 'common sense' the mast needs the cables connected except the 'front' ones.. sorry.. will take a way to get the terminology down. At this point, just have a retired guy just going only with me and my 30 year old kids and no one has experience. That won't stop me. Went on ebay and looked at jibs. will check the local marina and using that dimension will consider jibs. Surprised after all these years of Sirius boats.. not many videos. Took a lot of pictures of houses on the lake shore since I live on the lake... Got more honey do list fix up the house better for lake side ! (after 30 years !)... but 'calm' days.. I'm going out. Will make a gizmo with a 2x8 board, put in back of my large pickup truck tailgate area, with Walmart portable power winch and make a long 2X2 wood with a pulley at top to be able to raise and lower the mast by myself. Surprisingly not many people ..sail...around here and really for short time I'm happy to go out with just a few people. Later I keep learning sailing... will practice raising and lowering main sail on land first along with jib if I can find one right away. Thanks again for any info !  

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Image upload Sirius 21

• The boat as such
• The cockpit
• For sailboats: The keel
• For sailboats: The rig
• For trailable boats: The boat on a trailor

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