sandhopper yacht

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• Sailboat Guide

Sandhopper 19

Sandhopper 19 is a 18 ′ 11 ″ / 5.8 m monohull sailboat designed by Oliver Lee and built by Parker Yachts starting in 1970.

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)

The SANDHOPPER is a shallow draft, twin keel version of the SQUIB.

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Sandhopper Sailing Dinghy

Sandhopper sailing dinghy

The Sandhopper, designed some 30 years ago by Oliver Lee, still offers excellent sailing and is currently the largest One Design fleet on the Thames Estuary providing:

Racing with crew of two or three. Leisure sailing with the family. Bilge keel hull design for drying moorings. All at a very affordable cost and low maintenance.

The Class Association was reformed in 1997 as the Sandhopper Class British Association following a resurgence of interest in the Class and a strong desire of the owners of the original 40 boats to protect the One Design status.

The Sandhopper is the shallow draft version of the Squib Keelboat. She has the same delightful handling qualities as the Squib, being feather light on the helm at all times and has the added advantage of being able to lay safely on exposed moorings which dry out at low tide, with its lower draft and GRP twin bilge keels.

The underwater lines of the hull are as fine as possible to give good performance in light airs and the sections above the water line are flared out to a generous beam of 1.87m (6’2″) combined with a ballast ratio of 55 gives ample stability and power to carry full sail in the strongest of winds.

The mast can be stepped and rigged by two persons without crane aid and with an all up weight of around 740kg. Can be easily towed behind the average family car.

A new boat costs around £12000 in full racing rig and an older second hand boat from about £2500 although these rarely remain on the market for long.

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Length : 5.79m Beam : 1.87m Sail Area : 31.28m sq

Sandhopper Class Association

Sandhopper 19

The sandhopper 19 is a 19.0ft fractional sloop designed by oliver lee and built in fiberglass by parker yachts (uk) since 1970..

The Sandhopper 19 is a light sailboat which is a high performer. It is very stable / stiff and has a low righting capability if capsized. It is best suited as a racing boat.

Sandhopper 19 for sale elsewhere on the web:

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The Sandhopper is the shallow draft version of the Squib Keelboat designed by Oliver Lee. She has the same delightful handling qualities as the Squib, being feather light on the helm at all times and has the added advantage of being able to lay safely on exposed moorings which dry out at low tide, with its lower draft and GRP twin bilge keels.

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Review of Sandhopper 19

Basic specs..

The hull is made of fibreglass. Generally, a hull made of fibreglass requires only a minimum of maintenance during the sailing season. And outside the sailing season, just bottom cleaning and perhaps anti-fouling painting once a year - a few hours of work, that's all.

The boat equipped with a fractional rig. A fractional rig has smaller headsails which make tacking easier, which is an advantage for cruisers and racers, of course. The downside is that having the wind from behind often requires a genaker or a spinnaker for optimal speed.

Unknown keel type

The boat can enter even shallow marinas as the draft is just about 0.69 - 0.79 meter (2.26 - 2.56 ft) dependent on the load. See immersion rate below.

Sailing characteristics

This section covers widely used rules of thumb to describe the sailing characteristics. Please note that even though the calculations are correct, the interpretation of the results might not be valid for extreme boats.

What is Capsize Screening Formula (CSF)?

The capsize screening value for Sandhopper 19 is 2.13, indicating that this boat would not be accepted to participate in ocean races.

What is Theoretical Maximum Hull Speed?

The theoretical maximal speed of a displacement boat of this length is 5.5 knots. The term "Theoretical Maximum Hull Speed" is widely used even though a boat can sail faster. The term shall be interpreted as above the theoretical speed a great additional power is necessary for a small gain in speed.

The immersion rate is defined as the weight required to sink the boat a certain level. The immersion rate for Sandhopper 19 is about 65 kg/cm, alternatively 365 lbs/inch. Meaning: if you load 65 kg cargo on the boat then it will sink 1 cm. Alternatively, if you load 365 lbs cargo on the boat it will sink 1 inch.

Sailing statistics

This section is statistical comparison with similar boats of the same category. The basis of the following statistical computations is our unique database with more than 26,000 different boat types and 350,000 data points.

What is Motion Comfort Ratio (MCR)?

What is L/B (Length Beam Ratio)?

What is a Ballast Ratio?

What is Displacement Length Ratio?

SA/D (Sail Area Displacement ratio) Indicates how fast the boat is in light wind: - Cruising Boats have ratios 10-15 - Cruiser-Racers have ratios 16-20 - Racers have ratios above 20 - High-Performance Racers have ratios above 24 Sail-area/displacement ratio (SA/D ratio): 20.61

Maintenance

When buying anti-fouling bottom paint, it's nice to know how much to buy. The surface of the wet bottom is about 10m 2 (107 ft 2 ). Based on this, your favourite maritime shop can tell you the quantity you need.

If you need to renew parts of your running rig and is not quite sure of the dimensions, you may find the estimates computed below useful.

This section is reserved boat owner's modifications, improvements, etc. Here you might find (or contribute with) inspiration for your boat.

Do you have changes/improvements you would like to share? Upload a photo and describe what you have done.

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• Information

1. Boat details

2. class you are entering, 3. day selection, 4. communication link during the regatta, 5. helm and crew details, 6. media, publicity and advertising, 7. your personal data.

• All of the information provided on this entry form, excluding your payment details, will be stored by BWL and our IT Partner, FL1, so that we can manage your entry to the regatta. Management includes assigning your boat to the correct class, checking your eligibility for races and prizes, sending necessary materials in the post to you, contacting you prior to the event to resolve any queries regarding your entry, contacting you during the event to inform you of messages, protests and other key information.
• A subset of your data will be stored on our website and made publicly available so that your fellow competitors and other visitors can see who has entered the event. This data will be limited to your boat details, the days of the regatta for which you have entered, the name which you have chosen to be publicly displayed (which may be your own name or another name) and any additional data you have provided about the Person in charge or Boat for public viewing.
• The same subset of data will be made available to the media covering the event, together with the town and country in which you live, so that they can include a regional element in their reporting. The media will not be provided with further address details, and will only be given contact details where you have expressly indicated that you are happy to be interviewed.
• We will use your contact details before, during and after the event to provide you with information about the regatta. You may opt out of these communications at any time, except that you may not opt-out of communications containing important safety or race management information about an event that you are currently entered for.

8. Declarations

The Sandhopper is the shallow draft version of the Squib Keelboat designed by Oliver Lee. She has the same delightful handling qualities as the Squib, being feather light on the helm at all times and has the added advantage of being able to lay safely on exposed moorings which dry out at low tide, with its lower draft and GRP twin bilge keels. We are delighted that Sandhoppers are racing in Burnham Week 2024

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Home » Shop » Sails » Sandhopper » Sandhopper Mainsail

Sandhopper Mainsail

£ 580.00

4 Weeks for Delivery

Description

Additional information.

Made in 5.52PKRS blue – it is the best cloth available for the Sandhopper. Whilst not the same as the Squib main there are similarities that carry over in the design. However the large overlapping Genoa has an effect on the mainsail which has to be taken in to account. The sail comes complete with numbers, battens and long sail bag.

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