Rudder vibration
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- Rank: Lubber
- Registered: Feb 27, 2021
- Last visit: Aug 19, 2021
- Posts: 3
Posted: Aug 19, 2021 - 09:57 PM
I bought a Hobie 16 this year and have had it on the water a couple times. I have found that when I get up to speed, I have a vibration coming from the rudder. What do I need to adjust? -
- Rank: Mate
- Registered: Oct 07, 2020
- Last visit: Feb 29, 2024
- Posts: 359
Posted: Aug 19, 2021 - 11:26 PM
A comment from one of the videos I posted:
Here is my rudder noise video:
https://youtu.be/GOX88EIhWDw
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Bryan in Poplar Grove, IL
Supercat 17, unknown year. Future project
Hobie 16, 1977 - died a spectacular death https://youtu.be/Y7O22bp2MVA
Hobie 16, 1978 - current boat
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- Rank: Mate
- Registered: Aug 01, 2002
- Last visit: Sep 14, 2024
- Posts: 425
Posted: Aug 20, 2021 - 06:26 AM
It's the fat lady singing!
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Jerome Vaughan
Hobie 16
Clinton, Mississippi
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- Rank: Mate
- Registered: Apr 07, 2017
- Posts: 367
Posted: Aug 20, 2021 - 09:04 AM
Correct me if I'm wrong but I heard it could be caused by your rudders being perfectly aligned which isn't a bad thing. If it annoys you try toeing them in a tiny bit.
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Bill Townsend
G-Cat 5.0
Sarasota
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- Rank: Mate
- Registered: Mar 19, 2004
- Last visit: Nov 21, 2024
- Posts: 964
Posted: Aug 20, 2021 - 09:57 AM
What type of rudder blades do you have (Lexan, fiberglass, EPO, etc.)? The classic explaination for Hobie rudder hum is turbulence coming off of the trailing edge. The fix is to clean up the trailing edge of the blade.
https://www.hobie.com/for…ewtopic.php?f=18&t=12859
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Edited by Dogboy on Aug 20, 2021 - 09:59 AM. -
- Rank: Chief
- Registered: Nov 26, 2009
- Last visit: Aug 10, 2024
- Posts: 2531
Posted: Aug 20, 2021 - 12:32 PM
I have the EPO rudders on my H18. They hum quite a bit at speed.
I followed the Hobie “fix”, didn’t do anything, they still hum.
It’s now something I ignore.
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Hobie 18 Magnum
Dart 15
Mystere 6.0XL Sold Was a handful solo
Nacra 5.7
Nacra 5.0
Bombardier Invitation (Now officially DEAD)
Various other Dock cluttering WaterCrap
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- Rank: Mate
- Registered: Jan 14, 2004
- Last visit: Sep 25, 2024
- Posts: 866
Posted: Aug 20, 2021 - 12:43 PM
We've had success by slightly beveling one side of the trailing edge and giving it an asymmetrical profile. It also helped some with the N20 1st gen. rudder ventilation issues.
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Philip
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- Rank: Lubber
- Registered: Jul 11, 2014
- Last visit: Mar 18, 2024
- Posts: 80
Posted: Aug 20, 2021 - 12:58 PM
I like it.
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1978 H18
1983 H18 (some of it)
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