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| Rudder Parallelism http://www.hobie.com/au/en/forums/viewtopic.php?f=14&t=38585 |
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| Author: | culpyy [ Mon Sep 19, 2011 11:47 am ] |
| Post subject: | Rudder Parallelism |
Good Morning. I had a little rudder hum over the weekend and shaved off the bulge as per other posts. Upon inspection of the tiller/rudder system, I found that the rudders were parallel to one another in the neutral position (that is rudders in line with long axis of hulls). When turning right or left, there was what I would estimate as a 15 to 20 degree discrepancy in the rudder alignment (between the two). Is that normal? I have not read anything regarding the level of parallelism the rudders take on or loose as they are put through a typical sailing day. Any thoughts on this? Should the rudders remain parallel during all aspects of using a Hobie 16? Thanks! |
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| Author: | reelknotty [ Mon Sep 19, 2011 12:28 pm ] |
| Post subject: | Re: Rudder Parallelism |
i am by no means an expert but I'm not sure what your explaining is physicly possible? If everthing is tight (no slop) if you move "X" 1 inch "Y" must move 1 inch as well. The only thing that i can imagine is if the holes in your rudders are worn and your getting some slop there? |
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| Author: | rattle 'n hum [ Mon Sep 19, 2011 12:40 pm ] |
| Post subject: | Re: Rudder Parallelism |
It's intentional....do some research on Ackerman steering. When you turn, the rudders have different angles of attack to give less drag as the two hulls travel through arcs of differing radii. (Cool stuff!) It is accomplished by having the crossbar shorter than the distance between the rudder pivots (pins). The tillers are angled in (going from back to front). That's why, if you put your rudder assembly on backwards (reversed left/right), you'll have a load of toe out and your cat becomes a dog! |
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| Author: | ChrisD [ Mon Sep 19, 2011 2:32 pm ] |
| Post subject: | Re: Rudder Parallelism |
Those crafty Germans! Very interesting. Thanks, learned something today just as time was running out. |
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| Author: | culpyy [ Mon Sep 19, 2011 4:53 pm ] |
| Post subject: | Re: Rudder Parallelism |
Thanks for the info! Always a pleasure! Awesome forum! |
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