Re: Cable tension Question

[Tom Mueller]

'Hello Club!
I'm finishing up an extensive annual on my F-24R46. The mechanic
signing off my work is having a difficult time excepting the rudder
return cable tension published in the Fairchild Instruction
book for F-24W46 and F-24R46 aircraft. It's the only manual I can find
that addresses cable tensions.
Rudder return cable tension is stated to be 169 lb. Please tell me if
anyone thinks this a typo, and what a more believable figure might be.
Anyone...Thanks,
Tom
Hanford Ca.'

[Jamie S. Treat]

'Tom,

I looked at the Military Manual, no reference to cable tension anywhere.
Good question, seems high to me also.

Jamie

Jamie S. Treat A&P/IA
Aircraft Restoration & Repair
24201 David C. Johnson Loop
Kelly Airpark
Elbert, CO 80106
HM/Shop 303-648-0130
JamieTreat@direcway.com

----- Original Message -----
From: "Tom Mueller"
To:
Sent: Tuesday, November 08, 2005 8:55 PM
Subject: [fairchildclub] Cable tension Question


> Hello Club!
> I'm finishing up an extensive annual on my F-24R46. The mechanic
> signing off my work is having a difficult time excepting the rudder
> return cable tension published in the Fairchild Instruction
> book for F-24W46 and F-24R46 aircraft. It's the only manual I can find
> that addresses cable tensions.
> Rudder return cable tension is stated to be 169 lb. Please tell me if
> anyone thinks this a typo, and what a more believable figure might be.
> Anyone...Thanks,
> Tom
> Hanford Ca.
>
>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>
>
>

'

[Steve Newing]

'If you tighten up to the spec in the book it will cut the pulley in half in
no time, it's way to high. We tension the cable up to what we think is about
right which is a lot less than 169lb your engineer should know what tension
for that size cable should be. I would be interested to see what he comes up
with and compare with others so we can come up suitable advice to everyone.
Steve Newing
Australia

----- Original Message -----
From: "Jamie S. Treat"
To:
Sent: Wednesday, November 09, 2005 4:52 PM
Subject: Re: [fairchildclub] Cable tension Question


> Tom,
>
> I looked at the Military Manual, no reference to cable tension anywhere.
> Good question, seems high to me also.
>
> Jamie
>
> Jamie S. Treat A&P/IA
> Aircraft Restoration & Repair
> 24201 David C. Johnson Loop
> Kelly Airpark
> Elbert, CO 80106
> HM/Shop 303-648-0130
> JamieTreat@direcway.com
> ----- Original Message -----
> From: "Tom Mueller"
> To:
> Sent: Tuesday, November 08, 2005 8:55 PM
> Subject: [fairchildclub] Cable tension Question
>
>
>> Hello Club!
>> I'm finishing up an extensive annual on my F-24R46. The mechanic
>> signing off my work is having a difficult time excepting the rudder
>> return cable tension published in the Fairchild Instruction
>> book for F-24W46 and F-24R46 aircraft. It's the only manual I can find
>> that addresses cable tensions.
>> Rudder return cable tension is stated to be 169 lb. Please tell me if
>> anyone thinks this a typo, and what a more believable figure might be.
>> Anyone...Thanks,
>> Tom
>> Hanford Ca.
>>
>>
>>
>>
>>
>>
>>
>>
>> Yahoo! Groups Links
>>
>>
>>
>>
>>
>>
>>
>>
>
>
>
>
>
>
> Yahoo! Groups Links
>
>
>
>
>
>

'

[M oparz]

'Could it be 169 inch pounds??

Regards

Jase

>From: "Steve Newing"
>Reply-To: fairchildclub@yahoogroups.com
>To:
>Subject: Re: [fairchildclub] Cable tension Question
>Date: Thu, 10 Nov 2005 09:20:55 +1100
>
>If you tighten up to the spec in the book it will cut the pulley in half in
>no time, it's way to high. We tension the cable up to what we think is
>about
>right which is a lot less than 169lb your engineer should know what tension
>for that size cable should be. I would be interested to see what he comes
>up
>with and compare with others so we can come up suitable advice to everyone.
>Steve Newing
>Australia
>----- Original Message -----
>From: "Jamie S. Treat"
>To:
>Sent: Wednesday, November 09, 2005 4:52 PM
>Subject: Re: [fairchildclub] Cable tension Question
>
>
> > Tom,
> >
> > I looked at the Military Manual, no reference to cable tension anywhere.
> > Good question, seems high to me also.
> >
> > Jamie
> >
> > Jamie S. Treat A&P/IA
> > Aircraft Restoration & Repair
> > 24201 David C. Johnson Loop
> > Kelly Airpark
> > Elbert, CO 80106
> > HM/Shop 303-648-0130
> > JamieTreat@direcway.com
> > ----- Original Message -----
> > From: "Tom Mueller"
> > To:
> > Sent: Tuesday, November 08, 2005 8:55 PM
> > Subject: [fairchildclub] Cable tension Question
> >
> >
> >> Hello Club!
> >> I'm finishing up an extensive annual on my F-24R46. The mechanic
> >> signing off my work is having a difficult time excepting the rudder
> >> return cable tension published in the Fairchild Instruction
> >> book for F-24W46 and F-24R46 aircraft. It's the only manual I can find
> >> that addresses cable tensions.
> >> Rudder return cable tension is stated to be 169 lb. Please tell me if
> >> anyone thinks this a typo, and what a more believable figure might be.
> >> Anyone...Thanks,
> >> Tom
> >> Hanford Ca.
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >> Yahoo! Groups Links
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >>
> >
> >
> >
> >
> >
> >
> > Yahoo! Groups Links
> >
> >
> >
> >
> >
> >
>

'

[Tom Mueller]

'Thanks for the input about rudder return cable tensions. The 169 lbs
has got to be an error. Cable runs to the rudder horns, steerable tail
wheel, rudder pedal cable to idler station, and finally the rudder
return cables are all interconnected. Setting the tension on any one
of them seems to affects the whole circuit.
I worked out a compromise of 100 lbs. on the return cables, I know
that seems tight, but all the other cables kinda fall in place at that
tension. (i.e. rudder cables 51 lbs, etc) Also the tail wheel cable
ends up a tad firm at this setting which I was hoping will cut down on
the tail wheel shimmy I hear so much about. I think the return cable
and pulley can safely handle 100 lbs, certainly not any more. Test
flight in one week after extensive year long annual. Feet don't fail
me now!
Tom
Hanford,Ca'

[robert Etter]

'I looked at the airplane, and noted the approximate dimensions of the
rudder pedals. The arm that is connected to the rudder cables running
toward the rear of the airplane are about 5" long, (pivotal axis of rudder
pedal to cable attach point) and the place where the rudder return cable
attaches is about 2" from center line to cable attachment pivot. It does
tell me that since to two cables are working against each other, and the
rudder cable is at 50 lbs, the return cable would have 2.5 time that. About
125 lbs minimum.
I looked at the cable that had been installed at the time of
disassembly. It has the wrong cable ends. The book shows thimbles at both
ends, but no shackles. That sure doesn't seem to be right.

Bob Etter
PO Box 974
Tonopah, NV 89049
775-482-6820
rletter@citlink.net'