UK-Cherub Forum

Cherub Chat => Tech Chat => Topic started by: simon_jones on December 30, 2012, 04:14:24 PM

Title: Wobbly Tiller
Post by: simon_jones on December 30, 2012, 04:14:24 PM

The issue is the hole that the rudder pin goes through on top of the tiller is starting to wear, when this first happened we carboned on a washer so the pin ran through it. As this has now come off does anyone know of anything that can be used to sleave the pin and stop the wear. This will be another project for the sticky weekend.

Title: Re: Wobbly Tiller
Post by: Phil Alderson on December 30, 2012, 09:37:50 PM

I have had the same problem with the bottom plate of the rudder, and with the pin in glued a carbon plate top and bottom. I made sure that I used hard filler mix in the middle to fill the void warn by the pin. It has not moved since.

If the top of the tiller is round, this is a bit more difficult and I would probably make up a tube of glass around the pin to act as a larger bearing surface, then open out the holes in the tiller and bond the glass tube into the top of the tiller. 

Title: Re: Wobbly Tiller
Post by: Graham Bridle on December 31, 2012, 10:54:21 AM

This happened on my old stock with a round tiller, what I did was take two penny washers and drill the hole to match the pin diameter, then greased the pin and araldited the two washers to the top and bottom of the tiller. When that set I removed the stock and wound carbon around the tiller over the washers, redrilling through the carbon when done. The job was a good-un, but as it was me there was resin everywhere.

Title: Re: Wobbly Tiller
Post by: Andrew Whapshott on January 01, 2013, 10:24:18 PM

If we have access to a lathe at the sticky weekend we could try making some delrin bearings for it.. I've got a few offcuts that would be perfect so will bring with

Title: Re: Wobbly Tiller
Post by: simon_jones on January 02, 2013, 02:47:20 PM

Thanks all, Andrew that would be great I'm sure Paul will have something latheish.

Title: Re: Wobbly Tiller
Post by: phil_kirk on January 07, 2013, 11:07:48 PM

OOOh! Graham did some sticky work.

My solution when building rudder stocks is to bond some pull-truded carbon tube into the tiller or bottom plate. This means drilling an oversize hole in the tiller tube allowing the carbon tube to be bogged in.  To ensure a perfect line up the carbon tube/s can be fitted while on a waxed rudder pin. it is easier to to start with overlong carbon tube and cut it down once cured.

Title: Re: Wobbly Tiller
Post by: Graham Bridle on January 08, 2013, 09:09:07 AM

I know, I have been waiting years for this question to come up !