[NSRCA-discussion] Pull-Pull

[Ron Van Putte]

On Jan 10, 2007, at 12:14 PM, wgalligan wrote:

> Ohhh yah   I forgot about that method.  Good one Bob.

Geez!  I'd never even thought about using that method.  Thanks Bob.

Ron Van Putte

>
> ----- Original Message -----
> From: "Bob Miller" <n444bm at yahoo.com>
> To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
> Sent: Wednesday, January 10, 2007 10:50 AM
> Subject: Re: [NSRCA-discussion] Pull-Pull
>
>
>> I'm using a combination of MK bellcrank that is connected via pull  
>> pull to
>> the servo.  Works for me.
>>
>> Bob M.
>> ----- Original Message -----
>> From: "Dave Burton" <burtona at bellsouth.net>
>> To: "NSRCA Mailing List" <nsrca-discussion at lists.nsrca.org>
>> Sent: Wednesday, January 10, 2007 9:23 AM
>> Subject: Re: [NSRCA-discussion] Pull-Pull
>>
>>
>>> Maybe I just don't get it, but any kind of tensioner or sliding  
>>> servo is
>>> just going to introduce slack into the rudder or elevator system  
>>> when
>>> under
>>> load. Why do you want that? Seems to me you would want the cables as
>>> rigid
>>> as possible. That's how I've always set them up.
>>>
>>> -----Original Message-----
>>> From: nsrca-discussion-bounces at lists.nsrca.org
>>> [mailto:nsrca-discussion-bounces at lists.nsrca.org]On Behalf Of  
>>> Fred Huber
>>> Sent: Wednesday, January 10, 2007 10:19 AM
>>> To: NSRCA Mailing List
>>> Subject: Re: [NSRCA-discussion] Pull-Pull
>>>
>>>
>>> Tensioner... servo mounted on sliding tray (we should al remember  
>>> how to
>>> do
>>> that from doing elevons without computer mixing... CF tubes  
>>> instead of
>>> the
>>> old nyrod on wire inherant slop should dissapear.) with a spring  
>>> to pull
>>> the
>>> servo in the opposed direction to the pull-pull wires.  (simplest
>>> mechanicly... not sure if its the lightest)
>>>
>>> You could play with the idea...
>>>
>>> Run pull-pull back to a free pulley that is pulled by the tensioner
>>> spring,
>>> taking the side load off the servo.  Slightly more complex and  
>>> adds the
>>> weight of the pulley, but should reduce servo wear.
>>>
>>> If you like having a bellcrank to adjust travel relationshoip  
>>> between
>>> servo
>>> and pull-pull... mount the bellcrank on the sliding servo tray.
>>>
>>>
>>> ----- Original Message -----
>>> From: "Jay Marshall" <lightfoot at sc.rr.com>
>>> To: "'NSRCA Mailing List'" <nsrca-discussion at lists.nsrca.org>
>>> Sent: Wednesday, January 10, 2007 9:07 AM
>>> Subject: Re: [NSRCA-discussion] Pull-Pull
>>>
>>>
>>>> Well then, no logical reason. All, including myself, agree that it
>>>> works;
>>>> I
>>>> also use it. It would also seem that if a tensioner is used, as  
>>>> with
>>>> timing
>>>> belts on a car, that the
>>>> trim-change-with-temperature-due-to-fuse-expansion
>>>> problem would disappear.
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: nsrca-discussion-bounces at lists.nsrca.org
>>>> [mailto:nsrca-discussion-bounces at lists.nsrca.org] On Behalf Of  
>>>> Ron Van
>>>> Putte
>>>> Sent: Wednesday, January 10, 2007 9:15 AM
>>>> To: NSRCA Mailing List
>>>> Subject: Re: [NSRCA-discussion] Pull-Pull
>>>>
>>>>
>>>> On Jan 10, 2007, at 8:09 AM, Gene Maurice wrote:
>>>>
>>>>> I have been using pull-pull on elevators for 15 years with great
>>>>> success. It
>>>>> is a little more difficult to setup, but once done, it is
>>>>> completely idiot proof.
>>>>
>>>>
>>>> Gene - I'm absolutely sure someone will say, "Well, you should  
>>>> know",
>>>> but not me.  <VBG>
>>>>
>>>> Ron Van Putte
>>>>
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>>>
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