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1. 05:54 AM - Re: Control Force Harmony (ALFRED ROSA)
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Subject: | Re: Control Force Harmony |
I extended the elevator 1 1/2". Procedure is posted on Bob's web site.
Al
On Tue, Apr 23, 2013 at 2:14 AM, jerzy krasinski <
jerzy_krasinski@sbcglobal.net> wrote:
> I forgot the exact number, would have to go to the airport and measurem
> but it was just below 2 inches.
> It was TR4
> Jerzy
>
> ------------------------------
> *From:* Galin Hernandez <galinhdz@gmail.com>
> *To:* "kis-list@matronics.com" <kis-list@matronics.com>
> *Sent:* Mon, April 22, 2013 5:05:43 PM
> *Subject:* Re: KIS-List: Control Force Harmony
>
> Jerzy.. How many inches did you add? Is this for the TR4 or TR1?
>
>
> On Mon, Apr 22, 2013 at 2:40 PM, jerzy krasinski <
> jerzy_krasinski@sbcglobal.net> wrote:
>
>> I added a couple of inches to the elevator extending it backwards.
>> This increased authority of the elevator and increased forces on the
>> elevator harmonizing the elevator and the ailerons
>> without any additional mechano-electro-springo gizmos.
>>
>> Jerzy
>>
>> ------------------------------
>> *From:* Graham Brighton <gbrighton@skymesh.com.au>
>> *To:* kis-list@matronics.com
>> *Sent:* Mon, April 22, 2013 1:57:09 AM
>> *Subject:* Re: KIS-List: Control Force Harmony
>>
>> gbrighton@skymesh.com.au>
>>
>> Hi OC,
>> Thx for ur great reply ... neat idea to work the Springs i
n
>> compression ..... think i get it ok .. but would be good to see the inst
all
>> .... do have any Pics at all .. ??
>> Cheers
>> Graham
>>
>> .
>>
>> --------------------------------------------------
>> From: "Owen Baker " <bakerocb@cox.net>
>> Sent: Monday, April 22, 2013 5:23 AM
>> To: "BRIGHTON GRAHAM" <gbrighton@skymesh.com.au>; "KIS-LIST MATRONICS" <
>> kis-list@matronics.com>
>> Subject: KIS-List: Control Force Harmony
>>
>> >
>> > 4/21/2013
>> >
>> > Hello Graham, You wrote: =93Am surprised someone hasn't come up with s
ome
>> sort of fail safe dampener devise to enable Elevator input feel to be
>> adjusted to harmonise together with Aileron input feel .... , probably
>> there is ... but i just haven't stumbled across it sob ..,!?? , anybody
>> ..??,=94
>> >
>> > There is such a device and I have one installed on my KIS TR-1. Read
>> about it in my KIS list 1/7/2006 posting copied here:
>> >
>> > "1/7/2006 Hello Bill, There is more to this pitch trim by springs
>> system than meets the eye. The typical system uses two springs in tensio
n
>> with an arm that moves the spring center connect point to adjust. This
>> works, but as you have discovered has some sloppyness or imprecision to
it.
>> Maybe because the two springs are always in play. A local Glasair builde
r
>> has developed a spring trim system that is superior. Can be used for pit
ch,
>> aileron, or rudder. It consists of two springs in compression between th
e
>> ends of a tube and a rod sliding within that tube with a nylon slider bl
ock
>> which acts as a center stop between the two springs. The slider block is
>> normally connected to an electric trim positioning motor and the end of
the
>> rod is connected to the control surface bellcrank. The result is a much
>> more positive repositioning capability of the trim center point and the
>> fact that when either control input is made or aerodynamic forces move t
he
>> control surface only one spring is in play, the one being compressed.
>> Adjustment of the trim center point is accomplished by operating the
>> electric trim positioning motor. Contact me if interested in pursuing th
is
>> idea further. OC"
>> >
>> > My motivation for installing this device was to accomplish pitch trim
>> without having a tab installed on my elevator, it could also be installe
d
>> for the purpose of changing pitch control forces with the trim capabilit
y
>> just an added benefit. By changing the length of the tube and rod, the
>> springs installed on each, and (for fine tuning) spacers on either the t
ube
>> or rod to increase initial spring compression force one can achieve an
>> almost infinite number of variable stick force required to move the
>> elevator in either direction.
>> >
>> > OC
>> >
>> > PS: One caveat -- To take true advantage of this system for pitch trim
>> one must have sufficient travel of the linear actuator to achieve the
>> desired maximum nose up and maximum nose down pitch conditions desired.
The
>> puny 1.2 inch travel of a Ray Allen servo is not likely to do the job.
>> >
>> > =======================
====
>> >
>> > Saturday, April 20, 2013 7:54 AM
>> >
>> > Hi OC,
>> > Sorry didn't mean something was specially wrong .... Is
>> that most lighties share that common lack of harmony of control feel wit
h
>> roll and pitch .... ,
>> > With our Ailerons which are specially wholesome ( non tapered) .. some
>> 'leverage' ... is going to be required .. (specially with increased spee
d
>> !) ...
>> >
>> > Where as elevators are mostly light ..!? .. In theory achieving
>> mechanical leverage advantage in equal measure to arrive at uniform cont
rol
>> input between pitch and roll is straight fwd .... but carn't think of an
y (
>> admit am only ppl and not flown very many types ..!) .., that have achie
ved
>> it ..?!
>> >
>> > Playing with bell crank ratios is the logical way .. but would be
>> super laborious I'm sure ... With my adjustable length stick ... roll is
as
>> light/heavy as my personal preference ( for whatever speed .. ) ....
>> However pitch which is normally light gets lighter with extra leverage
>> grrr .... Am surprised someone hasn't come up with some sort of fail sa
fe
>> dampener devise to enable Elevator input feel to be adjusted to harmonis
e
>> together with Aileron input feel .... , probably there is ... but i just
>> haven't stumbled across it sob ..,!?? , anybody ..??,
>> >
>> > Anyway am happy at present to retract down the stick for xcrountry
>> legs and map reading/iPad etc ...,
>> >
>> > Just was that stick position came up that's all ... ,
>> > Cheers
>> >= --> http://forums.matronics.comsp;
>> -nics.com/contribution" ======
>>
>>
>>
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