Rainbow 24 Information, Review, Specs

Boat drawing
Make
Model
Number Built
500
Production Year(s)
1962 - 1977

The Rainbow 24 is a classic 24-foot masthead sloop, renowned as a highly effective and safe training vessel. Designed by the esteemed firm Sparkman & Stephens (S&S) and built by Tidewater Boats near Annapolis, Maryland, this sailboat was specifically conceived to introduce aspiring sailors to the fundamentals of sailing using the hands-on "Annapolis Way" methodology. Its reputation as a reliable and forgiving boat made it an ideal choice for the Annapolis Sailing School, where thousands of beginners gained their initial sailing experience.

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The genesis of the Rainbow 24 dates back to 1961 when Sparkman & Stephens, under design number 1701, developed the vessel specifically for the Annapolis Sailing School. Production commenced in 1962 and continued until 1977, with approximately 500 hulls built during this period. Sparkman & Stephens, a firm celebrated for its influential and prolific designs, tailored the Rainbow 24 to meet the precise requirements of a beginner-friendly training boat, emphasizing safety and ease of handling.

Tidewater Boats, the Annapolis-based builder, operated within a vibrant maritime community, though specific details regarding its manufacturing ethos are scarce due to the company ceasing operations by 1977. However, it can be inferred that their production during this era focused on contributing functional sailboats to the local sailing scene. The design saw some important variations during its production run. The original Rainbow 24 featured a cuddy cabin. A version with an extended coach roof and a full cabin, designed for more comfortable cruising, was known as the Rainbow Weekender. Additionally, a version without any cuddy or cabin, built for the U.S. Naval Academy, was aptly named the Knockabout. Interestingly, initial versions of the Rainbow 24 were found to be somewhat tender, leading to an increase in ballast to 1120 pounds, enhancing its stability.

Sailing Performance and Handling

Given the Rainbow 24's length of 24 feet, traditional performance ratios are not typically applied for qualitative analysis. However, real-world accounts consistently describe the Rainbow 24 as a light sailboat that offers good performance, making it an engaging vessel for its size. It is widely regarded as a very stable and stiff boat with excellent righting capabilities, a crucial characteristic for a training platform. The boat’s fin keel contributes to its maneuverability, though this comes with a slight trade-off in directional stability compared to boats with full keels. With a draft of 3.5 feet, it retains the ability to access shallower anchorages and marinas, a practical advantage for coastal sailing. Owners and sailing schools frequently praise its "super safe" and forgiving nature, asserting that it remains an outstanding basic trainer. Some reports indicate that the Rainbow 24 is "significantly overrigged" compared to many similar sailboats, suggesting a design that prioritizes spirited sailing characteristics.

Accommodations and Layout

The interior accommodations of the original Rainbow 24 are minimalist, reflecting its primary purpose as a daysailer and training boat rather than an extended cruiser. The boat features an "enormous cockpit," capable of comfortably seating six to eight adults, which is a significant asset for a boat of its size and its role in sailing instruction. The original design included a cuddy cabin, providing a very basic enclosed space. Due to this design focus, there is limited headroom within the cabin. For those seeking more substantial interior comforts, the Rainbow Weekender variant offered a full cabin in place of the cuddy, better suited for overnight stays. Based on its role, the interior finishes of the Rainbow 24 would have been practical and durable, designed for heavy use and easy maintenance, prioritizing functionality over luxury.

Owner's Perspectives

Owners and users of the Rainbow 24 consistently laud its robust construction and its inherent safety, traits that stem directly from its design as a school boat. It is frequently described as a reliable and enjoyable vessel, particularly for those learning to sail or seeking a simple, low-maintenance daysailer. The enduring presence of the Rainbow 24 in the fleet of the Annapolis Sailing School decades after its introduction stands as a testament to its effectiveness and timeless design as a basic trainer. While the initial versions experienced some tenderness, this issue was addressed early in the production run with an increase in ballast. No other pervasive design flaws or common maintenance issues are widely reported by owners, reinforcing its reputation as a well-built and dependable sailboat.

Measurements

Construction & Hull

Construction Material
Fiberglass (Solid)
Hull Type
Monohull Sailboat
Keel Type
Fin
Rudder
1x Spade
Ballast
1120 lbs (Iron)
Displacement
2250 lbs
Water Capacity
-
Fuel Capacity
-

Engine

Engine Make
Engine Model
Engine Type
Engine HP
Engine Count
1
Drive Type
Fuel Type
Hover over a measurement
IJPE FS LOALWL

Rig & Sails

Rig Type
Masthead Sloop
P (Main Luff)
21.7 ft
E (Main Foot)
10 ft
I (Foretriangle Height)
24 ft
J (Foretriangle Base)
8.8 ft
Forestay Length (est)
25.56 ft
Main Sail Area
108.5 sqft
Foretriangle Sail Area
105.6 sqft
Total Sail Area (Reported)
214 sqft
Total Sail Area (Calc)
214.1 sqft

Dimensions

LOA
24 ft
LWL
17.25 ft
Beam
6.25 ft
Draft
3.5 ft
Max Headroom
-
Air Draft
-

Calculations

Hull Speed
5.57 kn
Pounds per Inch Immersion
385.23