Alan Johnstone

j121 2

j121 1

j121 3

Fiberglass

<p>Monohull boats are vessels with just one hull, as the name itself suggests. They can be monohull <a href="https://theboatdb.com/boats/type/sail">sailboats</a> or <a href="https://theboatdb.com/boats/type/power">powerboats</a>, which means they can be powered by an engine or by the wind. In addition, monohull boats can have a high level of luxury on board and can therefore be referred to as monohull yachts. At TheBoatDB you can look into monohull boats and explore their features. In addition, you can filter your search through monohull sailboat manufacturers and explore all models available on our site. Compare all models on our website from the comfort of your home.</p>

Monohull

j121-1_1580721484

J Boats

Euro

<p>The category of sailboats includes both <a href="https://theboatdb.com/boats/category/daysailer">sailing yachts</a> which are luxurious and charming vessels used for recreational purposes, as well as <a href="https://theboatdb.com/boats/category/cruiserracer">racing sailboats</a> that are used for sports. Some have a single hull while others can have two or three. Compare different types of sailboats through sailing boat specs on TheBoatDB and find out the best one for you. Choose according to boat specs, and explore sailboats that vary from very large vessels, appropriate for ocean cruising, to small ones used to roam the shores.</p>

Name	Value
Maker	J Boats
Maker website	https://www.jboats.com
Model	J/121
First built hull	2017
Boat type	Sail
Category	Cruiser Boats
Hull type	Monohull
Hull material	Monohull

Name	Value
Top speed	12.89 kmh
Length overall	12.19 m
Length at waterline	10.7 m
Beam overall	3.78 m
Draft maximum	2.16 m
Displacement	5,199.98 kg
Ballast type	Cast iron fin with lead bulb
Helm	2 wheels
Rudder	1 spade rudder
Cockpit	Open aft cockpit

Name	Value
Naval architect
Name/Studio	Alan Johnstone
Website	http://www.jboats.com/

Name	Value
Spars	Mast and boom in Carbon fiber
Standing rigging	Single-strand (ROD) discontinuous
Number of spreaders	2
Spreaders angle	Swept-back
Upwind sail area	90.02 sq.m
Downwind sail area	200.02 sq.m

Name	Value
Engine A
Power	29 HP
Type	Inboard engine ; Diesel
Engine B

2017 J Boats J/121

Boat Overview

Type

Maker

Hull type

Hull Material

Fiberglass

Category

Boat length (LOA)

12.19 m

See all details

Overview

Discover the Pro

Specs

Performance & Ratios

Name	Value
Sail Area to Displacement (SA/D)	0.08
Upwind SA to Displacement	30.5
Downwind SA to Displacement	67.78
Hull Displacement Speed	0.08
Displacement to Length (D/L)	7.94
Capsize Screening Formula (CSF)	2.2