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Building Tips and technical articles. => Building techniques => Topic started by: Jerry Reider on January 03, 2010, 07:34:58 PM

Title: Leadout / Bellcrank / Pushrod Alignment
Post by: Jerry Reider on January 03, 2010, 07:34:58 PM
Getting my elevator at 0 and my leadouts even has always been a crap shoot to some degree for me.  I came up with a method to get this right for sure.  When I make my leadouts I always make them the same length.  I clamped a piece of 1/2 x 3/8 x 4" maple to top and bottom of the elevator/stabilizer assembly to hold the elevator at 0.  I bent a piece of about .05 music wire as shown in the picture below.  I threaded it through the end wire loops of my leadouts.  I hung the music wire fixture from a water pipe in my basement.  I then added a weight to the landing gear to get the main spar plumb.  I was able to mark and cut off the pushrod and solder the clevis into the exact location while having my elevator at 0 and my leadouts even on the ends.  Since I always start with equal length leadouts I know that my Bellcrank is also at 0.
Title: Re: Leadout / Bellcrank / Pushrod Alignment
Post by: Roger Vizioli on January 03, 2010, 08:48:37 PM
Neat trick. Close to what I do. Sure beats the  "by guess and by God" method or TLAR system. H^^

TLAR
A term often used by Rollin.
did he get it from you, or vice versa!   ???

Roger V.
Title: Re: Leadout / Bellcrank / Pushrod Alignment
Post by: Geoff Goodworth on January 04, 2010, 12:38:05 AM
Roger, TLAR has been around for a long time. I had my first argument about it in 1970. I had studied plastics technology at university and designed a plastic component for the Leyland Mini that we were building in Australia but my boss' TLAR was twice as thick as my strength calculations indicated.

We compromised by settling on a mid-point thickness and the couple of examples that I saw last year were still going fine.  LL~ #^

Cheers, Geoff
Title: Re: Leadout / Bellcrank / Pushrod Alignment
Post by: Roger Vizioli on January 04, 2010, 07:03:56 AM
Thanks Geoff.
My first "hearing" of the term was in the 90's.
Happy New Year!
Roger
Title: Re: Leadout / Bellcrank / Pushrod Alignment
Post by: john e. holliday on January 04, 2010, 10:40:33 AM
Is that as good as the "KISS" principle?
Title: Re: Leadout / Bellcrank / Pushrod Alignment
Post by: Dick Pacini on January 04, 2010, 11:23:51 AM
.......? ???
Title: Re: Leadout / Bellcrank / Pushrod Alignment
Post by: Randy Powell on January 04, 2010, 12:26:12 PM
Sort of like another engineering term: SWAG.
Title: Re: Leadout / Bellcrank / Pushrod Alignment
Post by: Roger Vizioli on January 04, 2010, 04:37:15 PM
Is that as good as the "KISS" principle?

yes Doc!  LL~
Roger V.
Title: Re: Leadout / Bellcrank / Pushrod Alignment
Post by: Geoff Goodworth on January 05, 2010, 03:05:19 AM
It is so good to be able to have a bit of a laugh without acrimony.

Over the last 24 hours, I have been on on a Sydney-based political blog where three regulars have been playing a bit of a game with words that sound the same, are spelled differently and have very different meanings. It was all a game but there were still a couple of people who chose to make things unpleasant.

As I said, it is so good to be able to have a bit of a laugh without acrimony.

Thank you  H^^
Title: Re: Leadout / Bellcrank / Pushrod Alignment
Post by: john e. holliday on January 05, 2010, 09:04:53 AM
What good is living if we can't have fun.  But, some people can't take what they dish out.