Author Topic: Elevator Control System Stiffness  (Read 553 times)

flyboy9000

  • Subscriber
  • registered
  • *
  • Join Date: Sep 2017
  • Posts: 2
  • My Gallery
  • Engine: 2054CC great plains
  • Sonerai Model: 218
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

  • Subscriber
  • registered
  • *
  • Join Date: Jun 2012
  • Posts: 706
  • My Gallery
  • Engine: GP built 2276
  • Sonerai Model: Sonerai IIL
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

  • Subscriber
  • registered
  • *
  • Join Date: Mar 2017
  • Posts: 19
  • My Gallery
  • Engine: 2180
  • Sonerai Model: 2LS
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

  • Subscriber
  • registered
  • *
  • Join Date: Sep 2017
  • Posts: 2
  • My Gallery
  • Engine: 2054CC great plains
  • Sonerai Model: 218
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 :)

 

Recent Topics

Photo file size by Chucker
Jan 19, 2018

Chucker's Sonerai II (minus) by Pttim
Jan 19, 2018

Ribblet Airfoils by Bobcat Kid
Jan 18, 2018

Oil Cooler Adapter by Chucker
Jan 15, 2018

Aeromomentum Engines by Smokyray
Jan 15, 2018

Jabiru 3300 engine by Bil438
Jan 15, 2018

Rotax 582 by Chucker
Jan 14, 2018

FS: Aluminum Sheet by eschrom
Jan 14, 2018

A sad day! by N127PZ
Jan 13, 2018

What is longest length of single tube for 2 Stretch? by Soneraifred
Jan 13, 2018

Fuel line connections by Smokyray
Jan 03, 2018

Racegunz's Sonerai 1 by racegunz
Jan 03, 2018

Counterweights by racegunz
Dec 31, 2017

Elevator Trim Cable by myles-dean
Dec 31, 2017

Powered by EzPortal