rudder bracket 96, 26x

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Dawgfish
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Re: rudder bracket 96, 26x

Post by Dawgfish »

I will check out the cam release gadgets when I get an extra buck or 2. for now the welded reinforced aluminum will do . In the process of this whole thinking through a engineering flaw thing, I have been considering a "break away" or (quick release) style rudder, mounted to the place where the cavitation plate bolts to the lower unit of the outboard. I never motor if I have the choice and with the strength of the motor mount , makeing twin rudder system parallel to the skeg of the motor but with clearance for the prop (of course) . it could be wider( front to back) to provide better side drift control and would be a power trim too!!
has anyone heard of a setup like this ? Is this even a reasonable idea?
any feedback would be appreciated!!
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restless
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Re: rudder bracket 96, 26x

Post by restless »

actually I have seen a mod like this on a boat called Masquerade I think... fairly substantial size too and by all accounts it worked well. We had just smashed through the face of an F6.. of 11 boats only 4 made it including our two.

I have considered it, even though we rarely go above 6kts. If we needed to really open the throttle I would like to know that this add on is seriously well engineered! The one I saw was a permanent feature and had been on the boat from the po.
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Dawgfish
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Re: rudder bracket 96, 26x

Post by Dawgfish »

restless wrote:actually I have seen a mod like this on a boat called Masquerade I think... fairly substantial size too and by all accounts it worked well. We had just smashed through the face of an F6.. of 11 boats only 4 made it including our two.

I have considered it, even though we rarely go above 6kts. If we needed to really open the throttle I would like to know that this add on is seriously well engineered! The one I saw was a permanent feature and had been on the boat from the po.
wow only 4 boats....congratulations on your survival!
my biggest concern is straining the bolt-hole threads at the lower unit attachment area.
since there are long shaft housings made for extending the prop , I am guessing another 16-20 inches below the motors skeg may not be too strenuous for the cast aluminum. the front to back dimension has me scratchin my head a bit. this is where too much could be ....uhhh ....well too much!
I am glad to hear that at least one other person has tried it!
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Ixneigh
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Re: rudder bracket 96, 26x

Post by Ixneigh »

That rudder blade add on to the lower unit mod is on my to do list. But only as an emergency equipment. I'll probably make one out of foam core fiberglass.
Ix
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Dawgfish
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Re: rudder bracket 96, 26x

Post by Dawgfish »

Ixneigh wrote:That rudder blade add on to the lower unit mod is on my to do list. But only as an emergency equipment. I'll probably make one out of foam core fiberglass.
Ix
cool! I was considering using the Aluminum sheet that is used on semi trailer boxes. it is really hard(for aluminum) and is easy to work and also is available at any junkyard/scrapyard! priced by the pound! 8)
for corrosion inhibitor I am thinking bedliner since it has done well so far on my test spots I've tried on DAWGFISH.
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restless
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Re: rudder bracket 96, 26x

Post by restless »

the mod I saw was above the prop... a blade ran along the top of the cavitation plate line then hooked down into the prop stream. Can't remember how far down it went into it though. A point to bear in mind here is that this will have a big effect on motor trim, ie. could put big strain on steering gear.
Whatever goes there will need to be pretty hardcore and adjustable, else perhaps totally the other way, go for something that can flex and yield a bit at extreme stress (don't really need rudders so much at high speed) but still provide turning power at pootling to sailing velocities. Hmmmm... That idea is quite seductive.. 1/8 ss 'L' plate mounted on some rubber anti vibration mounts... off I go into engineering meditation. We can't do that as our engine provides a pretty crucial boarding ladder + we use it as a scuba dive platform. But then, if it were a qd (quick detach)...
btw my 'avatar' was the day after the one before, by which time it had gone up to F8
Image
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DaveB
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Re: rudder bracket 96, 26x

Post by DaveB »

That Picture is Reckless, not Restless. :?
That 40 degree heel would send a lot of stuff in the cabin sole and maybe a crew or to. :o
Must be fun getting the rail down. :)
Dave
restless wrote:the mod I saw was above the prop... a blade ran along the top of the cavitation plate line then hooked down into the prop stream. Can't remember how far down it went into it though. A point to bear in mind here is that this will have a big effect on motor trim, ie. could put big strain on steering gear.
Whatever goes there will need to be pretty hardcore and adjustable, else perhaps totally the other way, go for something that can flex and yield a bit at extreme stress (don't really need rudders so much at high speed) but still provide turning power at pootling to sailing velocities. Hmmmm... That idea is quite seductive.. 1/8 ss 'L' plate mounted on some rubber anti vibration mounts... off I go into engineering meditation. We can't do that as our engine provides a pretty crucial boarding ladder + we use it as a scuba dive platform. But then, if it were a qd (quick detach)...
btw my 'avatar' was the day after the one before, by which time it had gone up to F8
Image
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Dawgfish
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Re: rudder bracket 96, 26x

Post by Dawgfish »

restless wrote:the mod I saw was above the prop... a blade ran along the top of the cavitation plate line then hooked down into the prop stream. Can't remember how far down it went into it though. A point to bear in mind here is that this will have a big effect on motor trim, ie. could put big strain on steering gear.
Whatever goes there will need to be pretty hardcore and adjustable, else perhaps totally the other way, go for something that can flex and yield a bit at extreme stress (don't really need rudders so much at high speed) but still provide turning power at pootling to sailing velocities. Hmmmm... That idea is quite seductive.. 1/8 ss 'L' plate mounted on some rubber anti vibration mounts... off I go into engineering meditation. We can't do that as our engine provides a pretty crucial boarding ladder + we use it as a scuba dive platform. But then, if it were a qd (quick detach)...
btw my 'avatar' was the day after the one before, by which time it had gone up to F8
Image
nice picture! my cabin would be a catastrophe after that, not to mention filling my jeans :o
as far as the rudder thing goes I have a strong feeling that the balance of the rig(front to back ) will be key for reducing stress at the helm(just fixed mine dont wanna do it again anytime soon).
your "L" plate idea is good and may give you a bigger diving platform!
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