Pietenpol-List: Bellcrank question

matronics · Post by **matronics** » Wed Jan 26, 2005 10:14 am

Original Posted By: Les Schubert

matronics · Post by **matronics** » Wed Jan 26, 2005 10:40 pm

Original Posted By: "rod wooller"
Subject: Re: Pietenpol-List: Bellcrank questionRick,I believe the purpose of two holes on top, and two holes on the lower end of the bellcrank, is to offer redundency, in the event of a pin failure.Chuck G.________________________________________________________________________________

matronics · Post by **matronics** » Wed Jan 26, 2005 11:16 pm

Original Posted By:
I don't think any redundancy is gained by the use of four pins. If any oneof the four bellcrank pins breaks, elevator control is lost...you can't pusha cable.Counter-intuitively, having only two pins would reduce the theoreticalprobability of failure.Mike Hardaway----- Original Message -----

matronics · Post by **matronics** » Thu Jan 27, 2005 12:00 am

Original Posted By: Clif Dawson

matronics · Post by **matronics** » Fri Jan 28, 2005 2:16 am

Original Posted By: Les Schubert
Subject: Re: Pietenpol-List: Bellcrank questionIn a message dated 1/26/05 11:29:50 PM Central Standard Time, bike.mike(at)verizon.net writes:>Mike,Bernard Pietenpol was a master of design. If he put four pins in there, then there was some very good reason for it. Sometimes, the purpose of a design is not readily evident. The plane can certainly be flown if only one half of the elevators (flippers) is operational. Power setting can also be used for pitch control.Chuck G.________________________________________________________________________________Date: Fri, 28 Jan 2005 07:48:33 -0700

matronics · Post by **matronics** » Fri Oct 13, 2006 12:53 pm

Original Posted By: "Rick Holland"