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dh-prb4253
Impulse 31 dual rudder assembly anyone think this assembly will work on the Mystic?
Impulse 31 dual rudder assembly anyone think this assembly will work on the Mystic?
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I too would like to know. Im thinking of modding mine some and would like the dual rudder setup and the use of two water lines -
Here is Darin Jordan's reply on the topic. According to him it is not worth it.
"Here is the answer I gave to another user who just asked this same question yesterday... It could probably be done. Would take some fabbing... Not sure why you'd want to do that. It'll increase drag for little benefit. The MG/Mystic already turns like it's on rails..."Comment
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I'm not sure what the benefit of adding an additional rudder on the Mystic would be... It would add drag, weight, etc., with very little, if any, positive benefit.
What would the goal be that is making you consider doing this??Darin E. Jordan - Renton, WA
"Self-proclaimed skill-less leader in the hobby."Comment
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Well for starters the looks, I personaly like how two rudders look on a boat and then looking for additional stability. In theory is it correct to say that if you were to go with a dual rudder design, in order to lessen the drag, you would have to go with shorter rudders? I am just speculating on the subject. You are the Mystic Guru anyway so I'll keep it simple and stay with the stock single rudder.Comment
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Funny you guys are talking about this and Im in the process of adding another rudder right now. Ive got another OE rudder and bracket on the way and by the way it looks I can just flip it over and bolt it to the left side. I havnt figured out exactly how to tie the two together for steering. Im thinking if I can find or make a threaded tube, I can screw it into the rudder where the water fitting goes and put a ball link on that, then a nut then the rubber tube. Im sure somebody can come up with a better idea on this.
I mainly needed more coolant running through as I am dealing with warm water temps, 80 to 85 deg, and equipment temps were unacceptable, even after opening up the cooling system. Thought about a prop wash pickup at first, but heard it would be more drag than an extra rudder. Im still considering a dual pickup rudder too. I was hoping cooler motor/esc temps will offset the extra drag enough to make it worth it. I hadnt read this thread before ordering the parts. Either way itll be fun to build it and look cool.
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Have you guys seen the dual rudder system designed for the Impulse 31? I believe this system will fit the Mystic well. Here is OSE's and Proboat's links:
http://www.offshoreelectrics.com/pro...rod=dh-prb4253
I just installed it on my brother's Impulse and the boat rides beautifuly, gaining on stability and cooling (one rudder water pickup feeds the ESC and the other the motor).Last edited by gyrotron; 08-21-2012, 10:57 PM.Comment
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It looks to me that the Impulse brackets are just a little bit shorter than the mystic rudder brackets, therefore the rudders would be closer to the propeller, (not having these parts in my hands, and just by looking at pictures they look different). 120man I was thinking about doing the same thing that you're doing, adding another stock rudder and just flipping it, I'd like to relocate the water cooling hole thru the hull, and drill one on each side inside the rudder struts, for dual cooling, (one for the ESC and the other for the motor). [I live in Florida and the water here in the summer is 80 to 90 degrees, and the ponds are warmer.] I'd like to flip over the angled aluminum part for the steering, and use a small tie rod for the rudders. I just need to find some small longer bolts for going thru the right rudder.
120man - I'd leave the water hole alone, so that you dont block the cooling hose.Comment
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Hey garret,
good job on your bro's impulse, any pics?
It seems the OE bracket flip will work. Got the parts and just mocked it up for now. I really like how it looks!
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I was thinking about the steering brackets too, and it looked like a great way to do it, but I think that will throw the "geometry" off. Im thinking the pivot point of the linkage between the two rudders should be directly behind the rudder pivot. It seemed like if you use the brackets to tie the two together, the tie rod would end up inboard some, and the rudders wouldnt stay in line(parallel) with each other as you turn them. It might not be allot, but Im not sure.
Right now Im finding out if I can get parts made. Im not sure the threaded tube is the way to go, there are other options. Heres a not so pro drawing..
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If I could find a water fitting with longer threads, that might work. A longer bracket (bolted where the stock bracket is) that extends straight back past the rear of the rudder with the link on it? or Maybe attach an "L" to the back of the rudder??
Id like to see how the dual works for a slalom. And at the beach in the surf. Im hoping the extra cooling will let me run all out in warm water conditions.Comment
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Boredom?Comment
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Gyrotron has the brother, I do not. lol. But I'd like the Impulse 31!
120man- I'm thinking that without any major fabrication you could just get an adjustable tie rod linkage and like you said install it where the water tube is. I was thinking about just under the silicon tubing.
dual ruddered mystic tie rod.jpgComment
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Make sure that wherever the tie-rod ends up, it's not in the prop blast... Keep it in front of the spray from the prop!
My prediction on this is that, when turning, this setup is going to drive the nose of the boat down into the water even more that it currently does with the single angled-face rudder.
I modified my Mystic 29 "Minus-Two" to accept the Impulse 31 rudder mounting system with the IM31 straight faced rudder. Lightened the handling up in the turns quite a bit going from the slanted rudder to a straight blade.Darin E. Jordan - Renton, WA
"Self-proclaimed skill-less leader in the hobby."Comment
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Sorry about that, I was gonna make two different posts but forgot...duh
In your first pic, some water fittings with a longer threaded part would be ideal. I havnt been able to find any though.
The bracket method in the second pic looks like a great idea. Definitely the more you can get the tie rod outboard the better. It might be something you can put together and turn the rudders and see how it does. I know you dont want them to toe in or out too much or itll cause tons of drag. Look up "ackerman angle"
For now Im going to pursue the water fitting /tube option. Im going to call a local place that might be able to do the machine work. Still might end up a dead end. Ill keep you postedComment
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