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1. 04:41 AM - Re: Washer at the top (Galin Hernandez)
2. 09:57 AM - Re: Fw: Washer at the top (Galin Hernandez)
Message 1
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| Subject: | Re: Washer at the top |
OC; So you have 2 nylon and one flat steel washer instead of Belleville
washers between the bottom of the aluminum shoe and the castle nut then
another nylon washer between the top of the aluminum shoe and the bottom of
the fork?
See attached drawing.
On Tue, Apr 4, 2017 at 11:17 PM, Owen Baker <bakerocb@cox.net> wrote:
> 4/4/2017
>
> Hello Galin and Steve, Galin questioned the use of a nylon washer adjacent
> to the top and bottom of the aluminum nose wheel shoe in the stack up for
> a KIS TR-1 nose landing gear.
>
> Please see the attached picture 2016-4-18A 009. It shows the stack up
> consisting of just nylon washers and a flat steel washer (next to the nut)
> that I used for over 500 flight hours on my Lyle #1 nose landing gear
> strut with no shimmy problems.
>
> Whether you are using nylon washers or Belleville washers the friction
> created is still dependent upon how tightly the nut is torqued. One may
> have to torque the nut to a higher value in order to obtain the 27 pound
> pull at the axle for the nylon washers instead of the Belleville washers,
> but the resulting anti shimmy friction is initially still the same.
>
> I believe that there are some advantages to using nylon washers instead of
> Belleville washers:
>
> 1) The nylon washers will not wear as rapidly as the steel-on-steel or
> steel-on-aluminum Belleville washers therefore one does not have to recheck
> / adjust the friction setting as often.
>
> 2) Nylon washers adjacent to the aluminum shoe will not wear the shoe as
> rapidly as steel Belleville washers adjacent to the aluminum.
>
> Any questions?
>
> OC
>
> PS: The full thickness AN310-12 castle nut appears in the attached picture
> only because I was trying to show its depth compared to the thinner
> AN320-12 nut intended for shear use only. I was unable to use the AN310-12
> nut on my Lyle #1 gear because of the shortness of the 3/4 inch diameter
> vertical stub. I had Lyle make the 3/4 inch diameter vertical stub portion
> of my #2 and #3 gear weldment longer so that I could use the full depth
> AN310-12 nut. I would have preferred even more length for that stub, but
> Lyle declined.
>
> ======================================
>
> *From:* Galin Hernandez <galinhdz@gmail.com>
> *Sent:* Tuesday, April 04, 2017 5:39 PM
> *To:* kis-list@matronics.com
> *Subject:* Re: KIS-List: Washer at the top
>
> Doesn't that affect the friction adjustment so it won't maintain the 27lbs
> break-out?
>
>
> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
> Virus-free. www.avg.com
>
>
> =========================================================
> On Mon, Apr 3, 2017 at 11:17 PM, Owen Baker <bakerocb@cox.net> wrote:
>
>>
>> 4/3/2017
>>
>> Hello Steve, I think that it is very desirable to have a thin flat nylon
>> washer next to the aluminum shoe both on the top and the bottom.
>>
>> OC
>>
>>
Message 2
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| Subject: | Re: Washer at the top |
OC, like always answers bring up more questions.
1) The drawing shows the stack up that I used with my Lyle #1 nose landing
gear for about 500 flight hours. I am using Belleville washers for my #3
Lyle nose gear. This is partially driven by the fact that the new longer
3/4 inch diameter portion of the vertical stub in my #3 Lyle gear is still
not long enough to use a full depth AN310-12 castle nut and the nylon
washers.
*Q: How many Belleville washers are you using and in what configuration?
Flare to Flare or Nose to Nose? *
2) The nylon washer at the top of the stack up is about 1/16 of an inch
thick with a notch cut out for the shoe swivel limit pin.
*Makes total sense.*
3) The lower two nylon washers are about 1/8 of an inch thick.
*1/8 inch each or 1/16 inch each for a total of 1/8 inch?*
4) Your drawing shows a relatively thick castle nut. In fact I was forced
to use a thin shear type AN320-12 nut because the 3/4 inch diameter
vertical stub was too short to use the full depth AN310-12 nut regardless
of what washers were used in the stack up.
*I tried but the drawing is not exactly to scale.*
5) Also I got tired of the nuisance effort required in constantly removing
and replacing the cotter pin every time that I wanted to rotate the castle
nut. What I have done with my #3 Lyle nose gear is drill out the cotter pin
hole so that I can insert a #6 hex socket head cap screw instead of the
cotter pin. The cap screw is fitted with two washers and an elastic stop
nut to hold it in place.
*I like this idea and will use it on mine.*
6) This cap screw arrangement has the added benefit of preventing the
castle nut from shifting back and forth (as permitted by the cotter pin)
every time the shoe changes direction.
*Yes, this also happens with mine.*
THANKS!
On Wed, Apr 5, 2017 at 8:29 AM, Owen Baker <bakerocb@cox.net> wrote:
> 4/5/2017
>
> Hello Galin, Your drawing is fairly accurate and I am very impressed with
> your drawing skill. I refer to this portion of the nose gear weldment as
> the lower vertical stub. For clarification, the portion of the vertical
> stub that is inside the aluminum shoe has a larger diameter than the
> portion of the vertical stub below the shoe which is 3/4 of an inch in
> diameter and has its lower portion threaded for the castle nut.
>
> A few comments:
>
> 1) The drawing shows the stack up that I used with my Lyle #1 nose landing
> gear for about 500 flight hours. I am using Belleville washers for my #3
> Lyle nose gear. This is partially driven by the fact that the new longer
> 3/4 inch diameter portion of the vertical stub in my #3 Lyle gear is still
> not long enough to use a full depth AN310-12 castle nut and the nylon
> washers.
>
> 2) The nylon washer at the top of the stack up is about 1/16 of an inch
> thick with a notch cut out for the shoe swivel limit pin.
>
> 3) The lower two nylon washers are about 1/8 of an inch thick.
>
> 4) Your drawing shows a relatively thick castle nut. In fact I was forced
> to use a thin shear type AN320-12 nut because the 3/4 inch diameter
> vertical stub was too short to use the full depth AN310-12 nut regardless
> of what washers were used in the stack up.
>
> 5) Also I got tired of the nuisance effort required in constantly removing
> and replacing the cotter pin every time that I wanted to rotate the castle
> nut. What I have done with my #3 Lyle nose gear is drill out the cotter pin
> hole so that I can insert a #6 hex socket head cap screw instead of the
> cotter pin. The cap screw is fitted with two washers and an elastic stop
> nut to hold it in place.
>
> 6) This cap screw arrangement has the added benefit of preventing the
> castle nut from shifting back and forth (as permitted by the cotter pin)
> every time the shoe changes direction.
>
> Thanks for your continued interest in this subject.
>
> OC
>
> =============================
>
> *From:* Galin Hernandez <galinhdz@gmail.com>
> *Sent:* Wednesday, April 05, 2017 7:39 AM
> *To:* Owen Baker <bakerocb@cox.net>
> *Subject:* Re: KIS-List: Washer at the top
>
> OC; So you have 2 nylon and one flat steel washer instead of Belleville
> washers between the bottom of the aluminum shoe and the castle nut then
> another nylon washer between the top of the aluminum shoe and the bottom of
> the fork?
>
> See attached drawing.
>
> ================================================
>
>
> On Tue, Apr 4, 2017 at 11:17 PM, Owen Baker <bakerocb@cox.net> wrote:
>
>> 4/4/2017
>>
>> Hello Galin and Steve, Galin questioned the use of a nylon washer
>> adjacent to the top and bottom of the aluminum nose wheel shoe in the
>> stack up for a KIS TR-1 nose landing gear.
>>
>> Please see the attached picture 2016-4-18A 009. It shows the stack up
>> consisting of just nylon washers and a flat steel washer (next to the nut)
>> that I used for over 500 flight hours on my Lyle #1 nose landing gear
>> strut with no shimmy problems.
>>
>> Whether you are using nylon washers or Belleville washers the friction
>> created is still dependent upon how tightly the nut is torqued. One may
>> have to torque the nut to a higher value in order to obtain the 27 pound
>> pull at the axle for the nylon washers instead of the Belleville washers,
>> but the resulting anti shimmy friction is initially still the same.
>>
>> I believe that there are some advantages to using nylon washers instead
>> of Belleville washers:
>>
>> 1) The nylon washers will not wear as rapidly as the steel-on-steel or
>> steel-on-aluminum Belleville washers therefore one does not have to recheck
>> / adjust the friction setting as often.
>>
>> 2) Nylon washers adjacent to the aluminum shoe will not wear the shoe as
>> rapidly as steel Belleville washers adjacent to the aluminum.
>>
>> Any questions?
>>
>> OC
>>
>> PS: The full thickness AN310-12 castle nut appears in the attached
>> picture only because I was trying to show its depth compared to the thinner
>> AN320-12 nut intended for shear use only. I was unable to use the AN310-12
>> nut on my Lyle #1 gear because of the shortness of the 3/4 inch diameter
>> vertical stub. I had Lyle make the 3/4 inch diameter vertical stub portion
>> of my #2 and #3 gear weldment longer so that I could use the full depth
>> AN310-12 nut. I would have preferred even more length for that stub, but
>> Lyle declined.
>>
>> ======================================
>>
>> *From:* Galin Hernandez <galinhdz@gmail.com>
>> *Sent:* Tuesday, April 04, 2017 5:39 PM
>> *To:* kis-list@matronics.com
>> *Subject:* Re: KIS-List: Washer at the top
>>
>> Doesn't that affect the friction adjustment so it won't maintain the
>> 27lbs break-out?
>>
>>
>> <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=webmail>
>> Virus-free. www.avg.com
>>
>>
>>
>> =========================================================
>> On Mon, Apr 3, 2017 at 11:17 PM, Owen Baker <bakerocb@cox.net> wrote:
>>
>>>
>>> 4/3/2017
>>>
>>> Hello Steve, I think that it is very desirable to have a thin flat nylon
>>> washer next to the aluminum shoe both on the top and the bottom.
>>>
>>> OC
>>>
>>>
>
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