REFLECTOR: Sticking rudder pedals

[Geoff Gerhardt]

I was out at the hangar last night and picked up some lithium spray
lubricant at Autozone on my way there.  A little spritz to lubricate the
tube-in-tube area solved the sticking problem - both rudder pairs run
smooth now.  Thanks for the tip.

Geoff

On Mon, Nov 14, 2011 at 11:32 PM, John Tvedte <johnt at comp-sol.com> wrote:

> Geoff,****
>
> ** **
>
> The pedals should run free and smooth – and the toe brake system should
> not require any additional return springs.****
>
> ** **
>
> You should not use the external springs on the Matco cylinders either –
> they can cause scratches in the cylinder shaft which can damage the o-rings.
> ****
>
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>
> Some comments from Scott @ Velocity…re. external springs on brake shaft.**
> **
>
> ** **
>
> “ There are return springs built in but these were added
> as helpers to make that better.  Actually they were to
> help a person keep from pushing on them when they didn't
> want to.  It just didn't work all the way around.  Bad
> idea. ****
>
> ** **
>
> I would take those springs off the cylinders as I do not
> use them anymore.  They are not needed and do not do what
> they were supposed to do.  Scott”****
>
> ** **
>
> I used Lubriplate spray lithium grease to lubricate the pedals.****
>
> http://www.lubriplate.com/products/spray-lubricants/spray-lube-a.html****
>
> ** **
>
> John****
>
> ** **
>
> ** **
>
> *From:* reflector-bounces at tvbf.org [mailto:reflector-bounces at tvbf.org] *On
> Behalf Of *Geoff Gerhardt
>
> *Sent:* Sunday, November 13, 2011 6:14 PM
> *To:* Velocity Aircraft Owners and Builders list
> *Subject:* REFLECTOR: Sticking rudder pedals****
>
> ** **
>
> I have the toe break rudder pedal setup.  I just setup my rudders
> yesterday and found that the co-pilot left rudder pedal doesn't work.
>  Without the rudders attached both pedals, all the pedals work smooth, but
> as soon as I connected the rudder cables to the pedal system, the pilot
> pedals work nice and smooth and can exercise the rudders thru their entire
> range, and the co-pilot right rudder pedal works just fine, but when I try
> to depress the co-pilot left pedal, it just binds.  It will only depress
> down if I either pull on the right rudder pedal (either P or CP), or pull
> on the left rudder cable.  The only thing I can think is that the
> tube-in-a-tube rudder actuation mechanism is binding as the co-pilot pedal
> is pushed.  As I mention, it works fine as the pedal is not depressing
> against a load (i.e. with the rudder cable disconnected), so I'm guessing
> there's some torquing of the mechanism going on that is causing it to bind
> under load.  I don't see an easy way to get lubrication in between the
> tubes that might help relieve some of this binding.  Is this a problem
> others have experienced?****
>
> ** **
>
> Thanks.****
>
> ** **
>
> Geoff****
>
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