1d48 sailboat

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• Sailboat Guide

1D 48 is a 48 ′ 5 ″ / 14.8 m monohull sailboat designed by Reichel/Pugh Yacht Design and built by TPI Composites between 1995 and 1996.

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)

1D 48 = ONE DESIGN 48. (A special one design racing circuit for this yacht did exist for at least a year.) Water ballast: 2315 lbs. max per side(2 tanks per side) Boats were equipped with a carbon spar.

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Who knew WhoDo would rise again

A wild chicago-mackinac race leads to a dramatic rescue moments before the 1d48 whodo sinks in the manitou passage.

In the chaos of trying to get the boat back on its feet, crewmember Russell Madsen said he heard helmsman and skipper Mike Gilburt say he “had no rudder.” When Madsen looked back moments later he saw the boat’s rudder and its broken post floating behind the boat with a chunk of hull attached to it.

“Someone was down below and they said, ‘We’re taking on water and we’re taking it on fast,” said Madsen, a Northport, Michigan, resident. “The hole was about 16 inches in diameter.”

While Gilburt called a mayday on the VHF radio, the crew worked to get the A2 spinnaker and the mainsail down and get life jackets for those who weren’t already wearing them, Madsen said. When he went down below to get a life jacket the water was up to his knees and rising fast. 

“When I went down a second time to activate the EPIRB, the water was up to my waist and the floorboards were floating,” Madsen said. 

WhoDo’s mayday, broadcast at 3:50 p.m. July 24, according to the Coast Guard, was heard by several other boats competing in the race, and several in the area immediately suspended racing to assist. Mark Bremer’s C&C 30 City Girl was only about a half mile away from WhoDo when they heard the call, Bremer said. 

“We were blasting along when we heard the distress signal and we started looking around and we pretty quickly spotted a boat that looked like it was in trouble,” Bremer said. 

The six-person City Girl crew immediately took down the sails and were standing by close to WhoDo as the crew of the beleaguered boat launched its 10-person life raft. 

With the boat already floating low in the water, the crew stepped into the life raft—one rented at the last minute after a problem with the boat’s original raft, according to Madsen—taking the boat’s race-tracking device with them. 

The City Girl crew threw a line to the life raft and pulled WhoDo ’s crew in, loading them onto the boat over the C&C’s open transom. Madsen estimated that the entire ordeal, from the knockdown to the time the WhoDo crew was safely onboard City Girl was only about 10 minutes.

“The whole thing was actually really calm and the way it worked out couldn’t have been any better,” Madsen said. “Nobody got a scratch on them.”

City Girl powered to nearby Leland, Michigan, and dropped off WhoDo ’s crew. The crew of the C&C opted to not resume racing.

“By that time we’d been out of the race for several hours,” Bremer said. “We were disappointed, but we felt really lucky that we were so close. There were other boats nearby waiting to help, we just happened to be the closest.”

WhoDo , owned by Helen and Gordon Mackenzie and Erik Owen, who was not onboard during the race, sunk quickly in about 30 feet of water near Pyramid Point, according to the Coast Guard, which launched a boat from Frankfort, Michigan, and a helicopter from Traverse City, Michigan, said Chief Petty Officer Lauren Jorgensen.

“The only hole in the boat when we were on it was where the rudder post broke,” he said. Likewise, although other sailors reported a large log floating in the area at the time of WhoDo ’s sinking, Madsen said they never saw and it and don’t believe it had anything to do with the boat’s sinking. 

WhoDo , which was built in the mid-1990s, sunk once before during Hurricane Katrina. Madsen said the boat received several upgrades for this sailing season including new sails, running rigging and other refits.

While the sailing on Sunday during the race, which started July 23 for racing divisions, was fast and warm, the fleet endured a series of squalls with winds up to 50 knots reported by some boats that caused knockdowns, obliterated sails and other damage. Twenty-two boats dropped out of the race. Later on Sunday a sailor suffering from a possible heart attack was airlifted off the Tartan 10 Temerity .

The downwind race was a sleigh ride for the 60-foot trimaran Areté , which finished the 289-nautical-mile course in 23 hours, still falling short of the multihull course record of 18 hours, 50 minutes set by Steve Fossett on Stars & Stripes . 

The TP52 Natalie J. , owned by Philip and Sharon O’Niel III of Bayview Yacht Club, won the Mackinac Cup division for larger boats and fellow Bayview Y.C. boat Flying Buffalo , an Offshore 36 owned by Al and Bob Declerq, won the Mackinac Trophy division. It was the fourth division win for the boat, which last won in 1969. 

For compete results, go to www.cycracetomackinac.com .

The following video, taken by WhoDo crewmember Russell Madsen, was taken as the boat dug into the wave that led to the rudder post breaking.

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YACHT RACING

America True Explores Advantages of Leasing

By Barbara Lloyd

• June 1, 1997

Dawn Riley has decided that ''the stickers stay on'' the yacht she is racing these days. It may only be lettering, but for Riley's status as a major player in America's Cup competition, the graphics mean progress toward her third cup effort.

The 32-year-old Riley and her coed America True syndicate of San Francisco have chartered a One Design 48 yacht for two seasons. That means that the team can leave its name and sail-shaped logo on the topsides of the 1D48 sailboat. Usually, a charter client such as America True has to peel off the graphics after finishing a regatta in a leased sailboat.

The 13-member America True crew is competing here this weekend in the 1D48 Class Newport Manhattan Series. The five-boat regatta includes an overnight race from Newport to New York City beginning tomorrow afternoon. The series ends Wednesday with a three-race competition beginning at noon off Battery Park in Lower Manhattan.

America True's long-term lease arrangement of the 48-foot yacht allows the syndicate to measure the progress of its crew while testing new sails and equipment.

''The One Design 48 feels a little different from an America's Cup yacht,'' Riley said of the ID48, which is a third smaller than a 74-foot International America's Cup Class yacht. ''But the brain of how to make the boat go fast is the same. The 1D48 has a similar sail plan to a cup yacht, and the crew positions are almost identical -- except that you need fewer grinders on this boat.''

Rather than buying a pair of used America's Cup yachts for training, as wealthier cup syndicates tend to do, the America True team has saved money by chartering. The program, which includes crew travel expenses, is expected to cost about $350,000 for two seasons.

In contrast, Italy's Prada syndicate has paid about $7 million for Bill Koch's 1995 inventory of cup yachts and equipment, including Mighty Mary, the yacht Riley competed on in the 1995 cup campaign. And Young America, the team sponsored by the New York Yacht Club, plans to practice with two used cup-class yachts: the former Young America, and New Zealand's Tag Heuer.

Only time will tell which system works. ''America's Cup is like a corporation with a whole lot of different factors that come together,'' said Jeff Madrigali, an Olympic bronze medalist in 1996 who is America True's program director. ''In the end, the fastest boat will win. It always does. But with enough resources, if you use them wisely, then you get to play.''

An America's Cup syndicate from Hawaii, the Aloha Racing team, has taken the 1D48 approach too, but with a different angle. John Kolius, the team's skipper, sails regularly on Abracadabra, a 1D48 owned by Dr. James Andrews, an orthopedic surgeon from Birmingham, Ala. He is an Aloha Racing sponsor.

John Bertrand, the 1D48 group president, said the yacht costs about $700,000 to buy, and about $25,000 for a first-time charter at one event. The fee increases to $40,000 for a second event, plus the cost of transporting the boats from one locale to another.

Dimensions of 1d48

as listed in PHRF database

DEFINITIONS

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John Bertrand (USA)

• By The Editors
• Updated: April 25, 2002

Bertrand (US) HOF

Bertrand (b. 1956) ascended to fame as the first to twice win the Laser Worlds (’76, ’77) and the NA championships (’75, ’77). The San Francisco sailor went on to win the Finn Gold Cup in ’78, and an Olympic silver medal in 1984.

He’s been involved in three America’s Cup campaigns, Courageous ’83, A2 in ’87, and Stars and Stripes in ’92, as tactician and strategist. He was also a key organizer of the 1D35 and 1D48 classes.

Bertrand now resides in Annapolis, Md. where his big-boat management company, Bertrand Racing Group, is presently involved in creating a new Maxi-Class to a box rule, of which Windquest _(ex _Zephyrus V )_ is a result. _

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1D 48 - Sailboat Sheets

Pre-Spec sailboat sheets for your 1D 48. Genoa, gennaker and spinnaker shets to fit your cruising or racing sailing style. Full range of options.

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