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Impala 35 (S&S)

Impala 35 (S&S) is a 34 ′ 3 ″ / 10.5 m monohull sailboat designed by Sparkman & Stephens and built by Niccolò Puccinelli (ITA) starting in 1969.

Drawing of Impala 35 (S&S)

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)

Similar to the S&S 34 and the SAGITTA 35. (S&S #2008)

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impala 35 sailboat

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Impala 35 ss

The impala 35 ss is a 34.28ft masthead sloop designed by sparkman & stephens and built in fiberglass since 1969..

The Impala 35 ss is a heavy sailboat which is slightly under powered. It is very stable / stiff and has an excellent righting capability if capsized. It is best suited as a bluewater cruising boat.

Impala 35 ss sailboat under sail

Impala 35 ss for sale elsewhere on the web:

impala 35 sailboat

Main features

Model Impala 35 ss
Length 34.28 ft
Beam 10.10 ft
Draft 6 ft
Country ??
Estimated price $ 0 ??

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impala 35 sailboat

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Sail area / displ. 14.28
Ballast / displ. 40.85 %
Displ. / length 371.92
Comfort ratio 35.19
Capsize 1.68
Hull type Monohull fin keel with rudder on skeg
Construction Fiberglass
Waterline length 25.60 ft
Maximum draft 6 ft
Displacement 13977 lbs
Ballast 5710 lbs
Hull speed 6.78 knots

impala 35 sailboat

We help you build your own hydraulic steering system - Lecomble & Schmitt

Rigging Masthead Sloop
Sail area (100%) 516 sq.ft
Air draft 0 ft ??
Sail area fore 301.62 sq.ft
Sail area main 214.52 sq.ft
I 44 ft
J 13.71 ft
P 39.04 ft
E 10.99 ft
Nb engines 1
Total power 0 HP
Fuel capacity 0 gals

Accommodations

Water capacity 0 gals
Headroom 0 ft
Nb of cabins 0
Nb of berths 0
Nb heads 0

Builder data

Builder ??
Designer Sparkman & Stephens
First built 1969
Last built 0 ??
Number built 0 ??

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Fin with rudder on skeg

Specifications IMPALA 35 (S&S)

Home - Sailboat Listings 1969 - 34.28 ft / 10.45 m - Niccolò Puccinelli (ITA) - Sparkman $ Stephens

Specifications IMPALA 35 (S&S)

IMPALA 35 (S&S) Sailboat Data

Hull Type: Fin with rudder on skeg Rigging Type: Masthead Sloop LOA: 34.28 ft / 10.45 m LWL: 25.60 ft / 7.80 m S.A. (reported): 516.00 ft² / 47.94 m² Beam: 10.10 ft / 3.08 m Displacement: 13,977.00 lb / 6,340 kg Ballast: 5,710.00 lb / 2,590 kg Max Draft: 6.00 ft / 1.83 m Construction: FG First Built: 1969 Builder: Niccolò Puccinelli (ITA) Designer: Sparkman & Stephens

Information from  sailboatdata.com .

Type Engine: Diesel Hull Speed: 6.78 kn

Specifications IMPALA 35 (S&S)

Giornale della Vela

History of Your Classic Boats: Impala 35, an oceanic 10-meter

  • September 26, 2023
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impala 35 sailboat

Impala 35| History of Your Classic Boats

More than 200 of you have sent us stories and images of your Classic Boats, enriching the online archive dedicated to them and making so many of these great designs of the last century available to all. Keep up the good work! Now, however, after recounting dozens of them through your words and descriptions, it is time to also see the history and details of some of these great projects. So here is the Impala 35, a 10.45-meter mid-1970s boat that is highly regarded as a solid, elegant and extremely seaworthy boat.

Do you have a Classic Boat to report? Are you a Classic Boat owner? Place it in our archive at this link ! Just enter data and description of the boat. The editors will publish it in a very short time.

impala 35 sailboat

Impala 35 | Origins

The Impala 35 first saw the light of day in 1969, the first hull to be built in fiberglass by Cantieri Navali 71 (Niccolo Puccinelli). The signature is Olin Stephens, one of the top names in 1960s ship design. It was thus born in a period poised between “classic” design and more radical innovation, a design season still split between the binomials of traditional and mass production.

It is a transitional period in which, almost suddenly, the water lines and shapes of the hulls change, the maximum beams begin to grow, “fattening” and lengthening the live work at heeled boat, paralleling an important change in the appendages, increasingly tapered, away from the traditional long keels. And the Impala 35 is definitely a child of this change. And of another project at the same time, the S&S 34, just earlier and also signed by Stephens and his studio.

impala 35 sailboat

Impala 35 | The Project

Born just a year earlier, the S&S 34 is a fast, seaworthy and very elegant boat, featuring late 1960s lines with wide sweeps and tapered appendages, and performing masterfully in racing, with an overall win at the Sydney-Hobart in 69. The Impala 35 is not far from this philosophy; in fact, it is almost the same boat, pantographed larger (10.21 x 3.07 vs. 10.45 x 3.08 m) and with some technical differences, such as a more pronounced profile in the deckhouse and a different arrangement of the engine, no longer at the mast foot but under the hatch, with the shaft coming out half a length between the centreboard and skeg, instead of just behind the aft coupling of the centreboard, as is the case on the S&S 34. Armed with a sloop, the Impala is a boat designed for offshore sailing, marked by high course stability given by a large displacement, fairly pronounced water lines, and a semi-long fin design, followed by a skeg-equipped rudder.

Impala 35

Shifting attention to the interior, a quarter berth engages the port broadside behind the entrance, immediately engaged by the charting station in front of it and, to starboard, the galley. In the dinette, the classic 1960s and 1970s layout takes shape, with sofas and center table ready to be used as additional berths, a solution that increases in no small part the number of berths on board, otherwise limited to the quarter berth and forward V berth.

impala 35 sailboat

Impala 35 | Yours

Fast and a good bowler, like its shorter sister, the Impala 35 also proves to be a good design for the high seas, with several built and great market success. Also notable was Ida Castiglioni’s 30th place at the 1976 Ostar where, just with a 35, she managed to hold her own against more than three-quarters of the fleet (30th vs. 125).

As for the Classic Boats in our archive, however, several Impala 35s among the photos you have seen are yours. They are in fact Nina , Mona Lisa , Ossanha e Laura , from 1972, 1973, ’73 again, and 1974, respectively, and, of all of them, by clicking on the link on their names you will find the sheet with history and details.

impala 35 sailboat

Impala 35 | Data Sheet

Designer Olin Stephens
Length Over All (LOA) 10.45 m
Length at Waterline (LWL) 7.80 m
Baglio Massimo 3.08 m
Dive 1.83 m
Displacement 6.34 t
Ballast 2.59 t
Sail Area 47.94 square meters
Weapon Sloop
Year of first launch 1969
Cabins 2
Sleeping places 3 + dinette
Construction site Shipyards 71

Three “tidbits” about Classic Boats

  • Want to learn more about the world of Classic Boats (1967-1998), the iconic boats of the period, the legendary designers, the stories and races of the “golden age” of sailing? Check out our section dedicated to Classic Boats !
  • Do you have a Classic Boat to sell ? Put it (for free) on our classifieds market !
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impala 35 sailboat

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  • Cantiere Nautico 71

Impala 35 - Cantiere Nautico 71 / STW001752

impala 35 sailboat

cabin cruiser

overall length

hull length

waterline length

standard draft

minimum draft

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mast height

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Impala 35 SS - Sailboat Sheets

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Pre-Spec sailboat sheets for your Impala 35 SS. Genoa, gennaker and spinnaker shets to fit your cruising or racing sailing style. Full range of options.

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COMMENTS

  1. IMPALA 35 (S&S) - sailboatdata

    Designed to determine if a boat has blue water capability. The CSF compares beam with displacement since excess beam contributes to capsize and heavy displacement reduces capsize vulnerability. The boat is better suited for ocean passages (vs coastal cruising) if the result of the calculation is 2.0 or less. The lower the better.

  2. Impala 35 (S&S) — Sailboat Guide

    Impala 35 (S&S) is a 34 ′ 3 ″ / 10.5 m monohull sailboat designed by Sparkman & Stephens and built by Niccolò Puccinelli (ITA) starting in 1969.

  3. Review of Impala 35 - www.yachtdatabase.com

    The Impala 35 is a sailboat designed by the American maritime architect bureau Sparkman & Stephens in the late sixties. The Impala 35 is built by the Italian yard Niccolò Puccinelli.

  4. Impala 35 ss - sailboat data sheet

    The Impala 35 ss is a 34.28ft masthead sloop designed by Sparkman & Stephens and built in fiberglass since 1969. The Impala 35 ss is a heavy sailboat which is slightly under powered. It is very stable / stiff and has an excellent righting capability if capsized.

  5. Specifications IMPALA 35 (S&S) - Boatsector

    IMPALA 35 (S&S) Sailboat Data Hull Type: Fin with rudder on skeg Rigging Type: Masthead Sloop LOA: 34.28 ft / 10.45 m LWL: 25.60 ft / 7.80 m S.A. (reported): 516.00 ...

  6. History of Your Classic Boats: Impala 35, an oceanic 10-meter

    Armed with a sloop, the Impala is a boat designed for offshore sailing, marked by high course stability given by a large displacement, fairly pronounced water lines, and a semi-long fin design, followed by a skeg-equipped rudder.

  7. Impala 35 : STW001752 : the SailingTheWeb sailboat datasheet

    The Impala 35 produced by the builder Cantiere Nautico 71 and designed by Sparkman & Stephens, is a cabin cruiser for cruise, rigged Sloop ... read more on Sailing The Web, the ultimate sailboat database

  8. Impala 35 for sale - Daily Boats

    View a wide selection of Impala 35 for sale in your area, explore detailed information, photos, price and find your next boat on DailyBoats.com

  9. Impala 35 SS - Sailboat Sheets | MAURIPRO Sailing

    Pre-Spec sailboat sheets for your Impala 35 SS. Genoa, gennaker and spinnaker shets to fit your cruising or racing sailing style. Full range of options.

  10. 1995 Impala 35 for sale. View price, photos and Buy 1995 ...

    Used 1995 Impala 35 for sale with the beautiful name "Echo" is located in Germany. This vessel was designed and built by the Impala shipyard in 1995. Key features 1995 Impala 35: length 10.67 meters, beam 3.6 meters, boat displacement 7,000 kilograms and max boat draft 1.85 meters.