Pietenpol-List: Oscar penned the Firewall Forward of the latest Sport
Posted: Tue Mar 01, 2011 11:47 am
Original Posted By: Ryan Mueller
Subject: Pietenpol-List: Re: Rudder bar and forward controlsActually, the stresses induced on the rudder bar from the rudder are almost inconsequential.Since the ends of the rudder bar are only connected to the rudderby means of cables (if built to the plans), then only one end of the rudderbar (the end that is pulling on the rudder) can be loaded at a time (you can'tpush a rope).What you need to be aware of is the potential for the pilot to bend the rudderbar, by inadvertently pushing with both feet. The pilot will undoubtedly haveboth feet pressing against the rudder bar at all times, and a bit of uncoordinatedfootwork, or panic can result in an excessive amount of pushing on both sidesof the rudder bar at the same time.Probably what you should do is take a scrap piece of the tubing you're using, thesame length as the rudder bar, and duplicate the center pivot arrangement,and secure this bar to something solid. Then position yourself in a well securedseat located at the proper distance from the rudder bar, and see how difficultit is to bend the sample rudder bar. You may be surprised how little forceit takes to bend the tube.There are very few metal parts in the plans that actually call for cro-moly steel,but the rudder bar is one. Methinks it is specified that way for a reason.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Tue, 1 Mar 2011 14:33:23 -0600Subject: Pietenpol-List: Oscar penned the Firewall Forward of the latest SportAv
Subject: Pietenpol-List: Re: Rudder bar and forward controlsActually, the stresses induced on the rudder bar from the rudder are almost inconsequential.Since the ends of the rudder bar are only connected to the rudderby means of cables (if built to the plans), then only one end of the rudderbar (the end that is pulling on the rudder) can be loaded at a time (you can'tpush a rope).What you need to be aware of is the potential for the pilot to bend the rudderbar, by inadvertently pushing with both feet. The pilot will undoubtedly haveboth feet pressing against the rudder bar at all times, and a bit of uncoordinatedfootwork, or panic can result in an excessive amount of pushing on both sidesof the rudder bar at the same time.Probably what you should do is take a scrap piece of the tubing you're using, thesame length as the rudder bar, and duplicate the center pivot arrangement,and secure this bar to something solid. Then position yourself in a well securedseat located at the proper distance from the rudder bar, and see how difficultit is to bend the sample rudder bar. You may be surprised how little forceit takes to bend the tube.There are very few metal parts in the plans that actually call for cro-moly steel,but the rudder bar is one. Methinks it is specified that way for a reason.Bill C.Read this topic online here:http://forums.matronics.com/viewtopic.p ... ______Date: Tue, 1 Mar 2011 14:33:23 -0600Subject: Pietenpol-List: Oscar penned the Firewall Forward of the latest SportAv