Author Topic: Elevator Control System Stiffness  (Read 302 times)

flyboy9000

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Elevator Control System Stiffness
« on: Oct 01, 2017 »
Hi,
I bought an S2 recently.  It hasn't seen regular flying since the early 80's.  I find the elevator control system stiffer than any other aircraft I’ve flown.  I have tried isolating various components in the system.  The only things left to check are the elevator hinge points and connection point on the elevator horn to push tube.

Is it normal to have some stiffness in the elevator control system on a Sonrai.  The ailerons take no effort at all.

Thanks
john

mhflyit

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Re: Elevator Control System Stiffness
« Reply #1 on: Oct 02, 2017 »
There shouldn't be any stiffness. Post some pictures of the control linkages for the whole elevator control system if you could so we can take a look. Elevator hinge links are on the 'outside' of the plane so pretty easy to check if there is any interference. Check all eye bolts and lubrication.
« Last Edit: Oct 02, 2017 by mhflyit »
Matt

Mytonic

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Re: Elevator Control System Stiffness
« Reply #2 on: Oct 02, 2017 »
disconnect the pushrod from the elevator and then check the elevator for any binding, not uncommon for the spar to be warped and hinges not aligned after welding

flyboy9000

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Re: Elevator Control System Stiffness
« Reply #3 on: Oct 15, 2017 »
Thanks for the reply’s.

I removed the elevator this weekend and cleaned out the 40-year-old grease.  The elevator now moves nice and smooth :)

 

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