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[asimmd]

HI All

I need to make a rudder post and I am considering making it myself.

I can make the mould no problem but,what do I pour into it?

My epoxy is too thick,and I don't know where to get resin from.

Can someone help please.

Thanks

Alan

[Martin (Admin)]

http://www.resincasting.co.uk/
http://www.resin-supplies.co.uk/casting%20resin%20detailed.htm
http://www.thecraftsupplier.co.uk/product_info.php/casting-resin-1kg-p-1035
http://shop.ebay.co.uk/?_from=R40&_npmv=3&_trksid=m570&_nkw=CASTING+RESIN
http://www.youtube.com/watch?v=cL33dO8mQuQ

 

[asimmd]

Hi Martin

Thanks for the onfo,it's exactly what I was looking for.

Alan

[Martin (Admin)]

Make me one too!   

[triumphjon]

just to be different i make all of my own rudders from brass , 4mm diameter for the stock , 4.2mm internal diameter for the post , and whatever flat sheet is required to make the blade to the size required for its designated model , this way every rudder is able to use a standard tiller arm from a model shop , the blade dosnt look over sized for its intended model , the joint between the blade and post are always slotted & soldered , this has never failed me yet , and only costs a fraction of a bought in rudder unit !

[stuartm]

With you on that one triumjon, I've done one for my canal boat and it works a treat. There' s always a bit of scrap brass in in the bits box and a cheapo blow torch and resin cored solder does the job just fine. Cost was negligible, satisfaction great.

[ben hall]

cant you use soider heat it up over the hub or eny source of heat in a pan pour it into the moulds its how i make my cleats and most my details

[triumphjon]

i now solder all of my rudders & small brass fittings using a multicore solder that about 4mm in diameter , i got a large roll for 50 pence at a local second hand store , it dosnt melt very well using an electric iron , but ive got a smallish gas torch that works a treat !  im currently awaiting the delivery of some brass balls so that i can make some ball cleats as ive so far not been able to source what i want for my next three builds ! 

[asimmd]

Thanks for the replies everyone.

I think my description of what I want is wrong.

I need something to sit over the rudder hole in the hull so the
rudder tube dosen't flop about.

The Marwede rudders from SHG Models have a cone for the support but as I have made
my own rudders from Robbe commercial rudders,I need to make a support of some sort.

The reason for the Moulding question is that my Wife has a small oiling bottle from her
sewing machine which has a cap on it that is exactly what I need.
I was thinking of making a mould from it then casting 2 supports from resin.

As she is away on holiday at the moment,she won't be any wiser.He He

Alan

[Colin Bishop]

You could try fitting a horizontal beam across the hull above the rudder position with a hole to take the top of the tube. Then the tube is supported at both ends and, more importantly, where the turning forces are exerted by the servo. The bottom end can be epoxied into place and built up with a small amount of car body filler to provide a bit of extra support.

Colin

[Bunkerbarge]

Make a 'dam' around the tube out of bits of scrap plywood then simply pour your material into the dam until it fills it.  I have done this with small parts using epoxy glue and with bigger stuff using fibreglass resin and had very good results with both.

[asimmd]

Horizontal beam won't work as the Daughter boat sits at the stern.

I have cut 2 pieces of hard balsa and drilled a 4mm hole at the centre of each.

The edges have been rounded off and the end result is quite good.

I reckon added strength will be achieved when the tube is epoxied into place.

Alan

[stuartm]

 Photos of my rudder on the working canal boat. All made from offcuts from the scrap box. about an hours work.