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  #31  
Old 05-10-2022, 07:31 AM
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PaulvS PaulvS is offline
 
Join Date: Aug 2019
Location: Western Australia
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Originally Posted by mtnflyr View Post
The instructions I got with my gussets don't talk about installing some on the aft side of the pedals. Seems that all the pedals would be loaded in compression on the forward (firewall) side. Can you clarify how some of the pedals could be in compression on the aft side and which ones need the gussets installed on that side, please?
The outer pedals are loaded in compression at the aft side when the inner pedal on the opposite side is pushed. For example, when the pilot pushes the right pedal (and its forward side is in compression) the torque is transferred via the long tube to the right pedal on the co-pilot side, where the rudder cable is attached. The "pull" from the rudder cable puts a compression force on the pedal aft side.

The instructions that came with the gussets that I got specified installation on the forward side only, so that's what has been done. I expect (and hope) the gussets will strengthen the joint whichever side they are welded. I vaguely recall (so may be wrong!) that there might also be some conflict with installing the finger patches on the same side as the tabs for the brake cylinders.
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Paul vS (yes I'm also a Van)
Building RV-6A #22320 O-320 FP. Wings and tail complete, fuselage almost done, working on canopy.
Flying my Aeroprakt A-22 STOL and the aero club's RV-9A while I build

Last edited by PaulvS : 05-10-2022 at 07:37 AM.
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  #32  
Old 05-10-2022, 11:32 AM
mtnflyr mtnflyr is offline
 
Join Date: Mar 2019
Location: Boulder, Colorado
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Originally Posted by PaulvS View Post
The outer pedals are loaded in compression at the aft side when the inner pedal on the opposite side is pushed. For example, when the pilot pushes the right pedal (and its forward side is in compression) the torque is transferred via the long tube to the right pedal on the co-pilot side, where the rudder cable is attached. The "pull" from the rudder cable puts a compression force on the pedal aft side.

The instructions that came with the gussets that I got specified installation on the forward side only, so that's what has been done. I expect (and hope) the gussets will strengthen the joint whichever side they are welded. I vaguely recall (so may be wrong!) that there might also be some conflict with installing the finger patches on the same side as the tabs for the brake cylinders.
Ah. Thanks. Now that makes sense. There is no load on the pedal that the cable is attached to when it is being pressed by the pilot, but when the force is transferred by the tube from the other side the compressive force is felt on the aft side of that pedal. Van's needs to update its instructions to reflect that.
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