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Author Topic: Rudder and rudder post help  (Read 321 times)

dave parker

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Rudder and rudder post help
« on: January 16, 2020, 10:51:09 AM »

I am planning on using one of the standard rudders and posts that you find in most model shops.

I am a little confused as to the best way to set it up.

For example

Does the brass rudder have to be push right up as far as it can against the black outer tube ie the underside of the hull?

If I don't do this, surely it will be possible to push it up and hence push up the tiller part inside the boat?

My sketch below shows what I intended on doing but am concerned with the gap between the top of the rudder and the underside of the hull




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DaveM

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Re: Rudder and rudder post help
« Reply #1 on: January 16, 2020, 10:59:37 AM »

Dave
You'll find that as you push the shaft further up into the tube you'll encounter a slight resistance/ridge at one point, after which the rudder is slightly stiffer. Don't be tempted to file this internal ridge away or you'll find, as I did just yesteday, that water will find its way into the boat. Pushing the rudder hard up against the plastic bush does nothing to prevent water ingress so I'd suggest going with the drawing.
DaveM
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canabus

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Re: Rudder and rudder post help
« Reply #2 on: January 16, 2020, 11:33:11 AM »

Hi Dave
I use a short piece of IC silicon tube at the bottom and another piece between the shaft tube top and the rudder horn.
If the horn comes loose you do not loose the rudder.

Canabus
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dave parker

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Re: Rudder and rudder post help
« Reply #3 on: January 16, 2020, 11:39:51 AM »

Thankyou
Have you got a picture to help me understand?
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radiojoe

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Re: Rudder and rudder post help
« Reply #4 on: January 16, 2020, 07:32:19 PM »


Hi Dave, As long as the top of the rudder tube is well above the water line you'll have no trouble with water ingress, just make sure the tube is sealed at the hull, set up as your sketch personally I would use a spacer between the rudder blade and the bottom of the tube ie. brass washers or a piece of brass tube to stop the rudder being pushed up, just a thought.


Joe
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dave parker

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Re: Rudder and rudder post help
« Reply #5 on: January 16, 2020, 09:52:13 PM »

Hi Radiojoe


Many thanks for your reply


I am definitely going to have a spacer in the gap to make sure of no movement!


Ylurnspeingers jave been my inspiration so it means a lot that you have replied!



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radiojoe

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Re: Rudder and rudder post help
« Reply #6 on: January 16, 2020, 10:12:48 PM »


No problem Dave, let us know how you're getting on with it.


Joe.
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RST

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Re: Rudder and rudder post help
« Reply #7 on: January 17, 2020, 08:06:19 PM »

Hi,

But sorry, is there actually any problem here at all?  I don't know the scale but I held up a spare one to your pic and scaled the zoom "roughy".
Just remember to trim the tube and post so you have enough access around that combing.  Something I often forget!


Rich
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dave parker

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Re: Rudder and rudder post help
« Reply #8 on: January 17, 2020, 08:26:13 PM »

Thanks Rich


The only difference is that you have you propeller pushed as far up as it will go where I havenít
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RST

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Re: Rudder and rudder post help
« Reply #9 on: January 17, 2020, 08:57:02 PM »

Rudder, you mean. But why do you desire such a "gap"? It's not "normal" in some respects.


Rich
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dave parker

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Re: Rudder and rudder post help
« Reply #10 on: January 17, 2020, 09:13:40 PM »

Hi yeah sorry rudder not propeller! Was reading something else earlier  :}


I was trying to ge the top of the rudder away from the hull for clearance and so it was centrally with the propeller 
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RST

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Re: Rudder and rudder post help
« Reply #11 on: January 17, 2020, 09:28:22 PM »

I think you're over thinking it.  There doesn't look much of a problem with clearance and I wouldn't worry too much about being central with the prop!  If you want an extra couple of mm that rudder kit gives you a big brass washer and even an o-ring for inspiration.

Have a look at modelboats.co.uk.  There's a guide just posted for Glynn guest on how to fit a rudder and propshaft etc.  It is a great explanation of everything in simple terms for a greenhorn.


Rich
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