420 Boat Speed?

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8 years 11 months ago - 8 years 11 months ago #5847 by tansey
420 Boat Speed? was created by tansey
We just closed on our 420. Whoop! Planning a trip from Tampa to Key West for Christmas. My wife and I have only sailed Beneteau and the like. Wonder what speeds the 420 averages.
10kts
20kts
30kts
Iron Genoa 2800 rpms
Last edit: 8 years 11 months ago by tansey.

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8 years 11 months ago #5850 by hayden
Replied by hayden on topic 420 Boat Speed?
David:

Congrats on your 420, that is one fantastic yacht. As Google tells us, you can calculate your hull speed as such:

How to calculate hull speed?
As a very general rule the maximum speed of any displacement hull--commonly called its hull speed--is governed by a simple formula: hull speed in knots equals 1.34 times the square root of the waterline length in feet (HS = 1.34 x ?LWL).



The waterline is sq. root of 37.333 feet = 6.11 x 1.34 = 8.18 is the IP 420 Hull Speed.

Now, on your trip to Key West, please take some photos and show us these speeds. We are counting on that :-)

Hayden

Hayden Cochran
IP35-165 Island Spirit
IslandSpirit35.blogspot.com
Rock Hall, MD
The following user(s) said Thank You: tansey

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8 years 11 months ago - 8 years 11 months ago #5852 by tansey
Replied by tansey on topic 420 Boat Speed?
FYI, if you ever want a logo made... www.hatchwise.com . I have used them for work for years. You submit a questionnaire about what you want to do a logo for, offer a prize($150.00ish) and you get dozens of entries from marketing artist. You can ask the designers to modify the design during the contest and they will. I attahed the 2nd place winnner we bought for crew shirts :) We had them modify the orginal to make it a cutter rig boat.
Last edit: 8 years 11 months ago by tansey.
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8 years 11 months ago #5853 by hayden
Replied by hayden on topic 420 Boat Speed?
David:

Thank you for the info, I will check it out. I also have looked at Fiverr for the same work. Your logo is great, well worth the money.
Hayden

Hayden Cochran
IP35-165 Island Spirit
IslandSpirit35.blogspot.com
Rock Hall, MD

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8 years 11 months ago - 8 years 11 months ago #5857 by Vyg
Replied by Vyg on topic 420 Boat Speed?
Congratulations on IP420! We just bought ours (SV "Lastochka" , hull #2) end of this summer and are still in the learning curve. We keep our boat in St. Petersburg, FL, so we are neighbors! Also planning to go South (but further - to Bahamas) around Christmas.

30 knots? The sailboat is not a transportation, it is a style of living. If you average 5 to 6 knots on a fair day you should feel content. As a friend of mine used to say - "A motorboat owner gets to wherever he wants fast. A sailboat owner is already there..." Enjoy...

Rosty
Last edit: 8 years 11 months ago by Vyg.

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8 years 11 months ago #5860 by tansey
Replied by tansey on topic 420 Boat Speed?

Vyg wrote: Congratulations on IP420! We just bought ours (SV "Lastochka" , hull #2) end of this summer and are still in the learning curve. We keep our boat in St. Petersburg, FL, so we are neighbors! Also planning to go South (but further - to Bahamas) around Christmas.

30 knots? The sailboat is not a transportation, it is a style of living. If you average 5 to 6 knots on a fair day you should feel content. As a friend of mine used to say - "A motorboat owner gets to wherever he wants fast. A sailboat owner is already there..." Enjoy...

Rosty


Agreed in general. However, we are planning our 1st overnight sail of 180 nautical miles to an unfamiliar harbor with a somewhat hazardous approach. One knot can make the difference in arriving in the light or dark. Hence, the question about speeds in different conditions. I now the speeds of a Beneteau in all those conditions but not my new lady.

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