Interesting that Jan W provided an answer to the questionnaire back in 29 March 2023 when he put the question to Chat GPT. (See thread entitled "One out of five for artificial intelligence"),
The answer, according to Chat GPT was mostly garbage:
Question: Why is the junk rig not as popular as the bermudan rig?
ChatGPT:
There are several reasons for the junk rig not being as popular as the bermuda rig:
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Lack of Visibility: With a junk rig, the sails are typically mounted on a multi-masted system, which can obstruct views forward and to the sides. This can be an issue for safety reasons.
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Less Efficient: Compared to the bermudan rig, the junk rig has more drag, and it doesn't sail as efficiently to windward. Therefore, it's not ideal for long-distance or offshore sailing.
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Limited Options: The junk rig is not as versatile as the bermudan rig when it comes to different sail configurations. It is more challenging to adjust or adapt to changing conditions and different sailing styles.
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Unfamiliarity: Many sailors and boat designers are more familiar with the bermudan rig, making it a more popular choice.
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Cost: The junk rig design can be more expensive to build and maintain compared to the bermuda rig.
Overall, the bermudan rig is a versatile, efficient, and widely recognized rig design, making it the preferred choice for many sailors and boat designers."
I tried the same question this morning, with Co-Pilot - result somewhat more accurate and nuanced.
Question: Why is the junk rig not as popular as the bermudan rig?
CoPilot:
"The short answer: the Bermudan rig dominates because it is faster upwind, easier to industrialise, and became entrenched through racing rules and fashion, while the junk rig—though superb for cruising—never fit the performance‑oriented direction of mainstream yachting.
Below is a structured, evidence‑based breakdown, with citations.
Core reason: Upwind performance and speed expectations
Modern yachting culture—especially from the late 19th century onward—prioritised upwind speed, and the Bermudan rig simply performs better in this domain.
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Direct comparisons show Bermudan rigs are significantly faster upwind than junk rigs, even when the junk rig is modernised with cambered panels or split configurations.
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Performance data from the Junk Rig Association confirms that a Bermudan‑rigged Varne 27 outperforms junk‑rigged boats upwind at most wind speeds.
This single factor—superior windward ability—is the biggest reason the Bermudan rig became the default for racing and then for mainstream cruising.
Industrialisation and standardisation
Once the Bermudan rig became associated with racing success, it benefited from:
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Mass production of aluminium masts and stainless rigging
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Standardised sailmaking techniques
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Design optimisation driven by rating rules
Forum discussions note that its popularity was “pushed by ratings and fashion,” reinforcing a feedback loop: the more Bermudan rigs were raced, the more they were built, and the more they were perceived as “normal.”
The junk rig, by contrast, remained a niche, largely home‑built or custom‑built system, lacking industrial momentum.
Ease of handling vs. performance culture
Ironically, the junk rig excels in areas that cruisers value:
These advantages are well documented in modern junk‑rig literature and practice.
But because the mainstream yachting world was shaped by racing, charter fleets, and production boatbuilders, the market rewarded performance, not ease of handling.
Historical inertia
The Bermudan rig’s rise in the 19th century—especially in Britain—was tied to:
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Its proven windward ability in Bermuda’s conditions
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Adoption by influential designers like Fife and Linton Hope
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Its early success in small racing classes, which shaped later yacht design culture
Once embedded, it became the default rig for naval architects, sailmakers, and insurers.
The junk rig, despite Blondie Hasler’s revival in the 20th century, never overcame this historical momentum.
Modern junk rigs can perform—but remain niche
Modern innovations (cambered panels, split junk rigs, aerojunk variants) have improved performance:
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Split junk rigs can approach Bermudan performance off the wind and sometimes exceed it in stronger breezes.
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But even the best modern junk rigs still lag upwind compared to a well‑designed Bermudan rig.
Thus, the junk rig appeals to a small but dedicated community—often long‑distance solo sailors—rather than the mass market."
I would answer the question in simpler terms: People are like sheep, they follow others. Commerce follows trends, then leads the process.