Bloody Rotten Tailwheel Shimy !!! :o(
Posted: Sun Feb 19, 2012 11:52 am
G'day All ....
H...E....L....P..... !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The plane is going GREAT again !!!
BUT .........................................
The tailwheel is driving me NUTS - with shimmy :o(
Please note :
I currently have about 50ish Lbs PSI in the tyre ...
The pivot bolt is angled BACKWARDS by about 10 degrees at the top
AND ... it is done up about as tight as I dare do it !
(but - there is little or no damping / friction within the pivoting motion)
My connecting springs & chains are "loosish"
I have different spring strengths on either side
I have a 2" wide , 3 leaf STEEL tailspring
Could I possibly get you guys 'n' gals (I assume here that we DO actually HAVE "some girl builders" ?!?) .... to tell me a few HOW & WHYS with YOUR tailwheel setups :
( BTW - I am running a SCOTT 3400 tailwheel - 10" dia' pneumatic tyre)
1) What Tyre pressure do you use ? ....................
2) What angle is the pivot pin for the yoke at ? ...........................................
... (this is the vertical axis pin / bolt, that holds the wheel yoke to the body of the Tailwheel assembly - around which the yoke & wheel pivot) ... (I need to know whether your pin is dead vertical, leaning forward at the top (and how many degrees if so ? .......... ) or leaning backwards at the top (and how many degrees if so ? .... )
3) Do you have the connecting springs & chains to the rudder arms
TIGHT or LOOSE ? ............................................
(if they are LOOSE - the HOW loose are they ? ...................................... )
4) Do you use different spring strengths on either side ? ...............................
(if so, what sort of difference in strength is there ? ...................................
5) ANY other tips or points of interest that I should be looking out for ? ......
Many Thanks Everyone !
Rick "Biggus" Harper
541R "Flying again"
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H...E....L....P..... !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
The plane is going GREAT again !!!
BUT .........................................
The tailwheel is driving me NUTS - with shimmy :o(
Please note :
I currently have about 50ish Lbs PSI in the tyre ...
The pivot bolt is angled BACKWARDS by about 10 degrees at the top
AND ... it is done up about as tight as I dare do it !
(but - there is little or no damping / friction within the pivoting motion)
My connecting springs & chains are "loosish"
I have different spring strengths on either side
I have a 2" wide , 3 leaf STEEL tailspring
Could I possibly get you guys 'n' gals (I assume here that we DO actually HAVE "some girl builders" ?!?) .... to tell me a few HOW & WHYS with YOUR tailwheel setups :
( BTW - I am running a SCOTT 3400 tailwheel - 10" dia' pneumatic tyre)
1) What Tyre pressure do you use ? ....................
2) What angle is the pivot pin for the yoke at ? ...........................................
... (this is the vertical axis pin / bolt, that holds the wheel yoke to the body of the Tailwheel assembly - around which the yoke & wheel pivot) ... (I need to know whether your pin is dead vertical, leaning forward at the top (and how many degrees if so ? .......... ) or leaning backwards at the top (and how many degrees if so ? .... )
3) Do you have the connecting springs & chains to the rudder arms
TIGHT or LOOSE ? ............................................
(if they are LOOSE - the HOW loose are they ? ...................................... )
4) Do you use different spring strengths on either side ? ...............................
(if so, what sort of difference in strength is there ? ...................................
5) ANY other tips or points of interest that I should be looking out for ? ......
Many Thanks Everyone !
Rick "Biggus" Harper
541R "Flying again"
-----------------------------------------------------------------
List archives located at: https://mail.dcsol.com/login
username "rebel" password "builder"
Unsubscribe: rebel-builders-unsubscribe@dcsol.com
List administrator: mike.davis@dcsol.com
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