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Showing results 1 to 8 of 8
Search took 0.00 seconds. Search: Posts Made By: Trim50
Forum: General Cruising Forum 05-02-2008, 07:14 PM
Replies: 28
Views: 16,049
Posted By Trim50
Yep...most likely, but it would have to be one...

Yep...most likely, but it would have to be one hellova bearing design not to transfer any bending load to the upper bearing.

I'm like'n my full keel barndoor rudder more all the time.
Forum: General Cruising Forum 05-02-2008, 07:08 PM
Replies: 28
Views: 16,049
Posted By Trim50
I have a full keel vessel with a barndoor rudder...

I have a full keel vessel with a barndoor rudder supported from top and bottom on a 2.25" diameter stainless steel post thru-hull above water and two keyways on my bronze tiller arm. My weakest link...
Forum: General Cruising Forum 05-02-2008, 06:44 PM
Replies: 28
Views: 16,049
Posted By Trim50
Also, if I'm not mistaken, the rudder on the...

Also, if I'm not mistaken, the rudder on the Hanse is not supported from the bottom of the shaft thus loading the rudder post in bending by virtue of design. Why then would they place a diameter...
Forum: General Cruising Forum 05-02-2008, 06:31 PM
Replies: 28
Views: 16,049
Posted By Trim50
Oh, it can have a predicted fatigue life...it...

Oh, it can have a predicted fatigue life...it just doesn't have a fatigue limit...therefore fatigue life is not infinite. This is one of the major motivators behind the 787 Carbon Fiber design....
Forum: General Cruising Forum 05-02-2008, 05:22 PM
Replies: 28
Views: 16,049
Posted By Trim50
After reading the introduction to fatigue, you...

After reading the introduction to fatigue, you can now look at the failed aluminum stock and see that it failed in torsion...not bending. The torsional fatigue crack was initiated at the right side...
Forum: General Cruising Forum 05-02-2008, 05:15 PM
Replies: 28
Views: 16,049
Posted By Trim50
"Material such as aluminum, copper and magnesium...

"Material such as aluminum, copper and magnesium do not show a fatigue limit, therefore they will fail at any stress and number of cycles."

Simple introduction to fatgue and materials...
...
Forum: General Cruising Forum 05-02-2008, 04:30 PM
Replies: 28
Views: 16,049
Posted By Trim50
Aluminum is NOT the right material for a rudder...

Aluminum is NOT the right material for a rudder shaft. I don't care where you place the tiller or quadrant. For such a critical element of a vessel which is always being cyclically fatigued, why on...
Forum: General Cruising Forum 04-30-2008, 06:37 PM
Replies: 28
Views: 16,049
Posted By Trim50
Some will disagree with me, but I find the whole...

Some will disagree with me, but I find the whole idea of using aluminum of any grade in salt water completely ludicrous. The only thing protecting aluminum from corrosion is corrosion.
Showing results 1 to 8 of 8

 
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