X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.2 cv=UschDK4B c=1 sm=1 tr=0 a=62Vrlwq93dyS4LaSTMevfw==:117 a=p/dX8SS/5bgbu9cvmGcl9g==:17 a=x7bEGLp0ZPQA:10 a=VqmtQeTB-p0A:10 a=JHtHm7312UAA:10 a=Ia-xEzejAAAA:8 a=pGLkceISAAAA:8 a=UKPAHat8AAAA:8 a=Rw7kzHybAAAA:8 a=_6GpL_ENAAAA:8 a=7g1VtSJxAAAA:8 a=E0DmEXJW1CVmyz53EpcA:9 a=L5nRI6mP_zneicZN:21 a=8Ec-0yCUvHzNg5fB:21 a=QEXdDO2ut3YA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=NhH9r8gmjCT3ELzcZ18A:9 a=3NC74ADfJ_eZZGI3:21 a=JSLlalq6kY6ewO1C:21 a=eEvQbB0RM9_52KXl:21 a=hTZeC7Yk6K0A:10 a=_W_S_7VecoQA:10 a=Urk15JJjZg1Xo0ryW_k8:22 a=Fc6xXSS-RxGHxrvp76Qp:22 a=etPKE8JaQlKBEHoyqQbf:22 a=grOzbf7U_OpcSX4AJOnl:22 From: "Tracy Crook rwstracy@gmail.com" Received: from mail-ot1-f54.google.com ([209.85.210.54] verified) by logan.com (CommuniGate Pro SMTP 6.2.9) with ESMTPS id 11868927 for flyrotary@lancaironline.net; Mon, 12 Nov 2018 20:01:32 -0500 Received-SPF: pass receiver=logan.com; client-ip=209.85.210.54; envelope-from=rwstracy@gmail.com Received: by mail-ot1-f54.google.com with SMTP id z33so9785576otz.11 for ; Mon, 12 Nov 2018 17:01:33 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=from:content-transfer-encoding:mime-version:date:subject:message-id :references:in-reply-to:to; bh=cAyXL7vx2YoV1ePZ6WnSLdpxXkiyeAiQd9RelYtW3xg=; b=qWa1oQf+SVdMlH/6djVjp0seQm/wislQDM/0+Y+2olTp0qi6XpcMFaX50sbENMQsGe h1XkfbqxEqGOS5Z6rPLGUQ4nM1nsdK37zqn7Sh+BlNqQT/x+TOHF635aet+ktyzwi2ye M6P562uYGLkxBvhM1rQRhzBwge2JnabW4Zn+BNHhRy6QBhbtxrvtchcrKdgImNpMYbgh izXfzMZWvLZdlE7zGA/1yIjlmIEpZft18ku6tQiPh5fRVFIUYq9CMHTVBWOKSLlnMzRE z91vTgzt83fptUopeHDfmmsnc+HHyVq8C0LzTdci91LQIy7q4Sl+JNmwbowv9M2pHiRt UWZA== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:content-transfer-encoding:mime-version:date :subject:message-id:references:in-reply-to:to; bh=cAyXL7vx2YoV1ePZ6WnSLdpxXkiyeAiQd9RelYtW3xg=; b=aKbWNwE/kSOs82RQshXB1/RNEBiitahtbq7lkC3KhCml1CDfDF0QQJOVySd9CVaC04 cZQVm1QjqQjp3wPyw1oVS+vQ30u4V2W3ChJb2Dt3A4i9PVS41+VIulCJg8Bnv09KGicF M23qLR8T45qyLRKl8PTgJPTKgBsZn4s23suoqpWSOmSYSlKBj+Oa6RxKI1kMtN1bXy18 WQxTCZAyZfzOEIm25/dMelB0cpAsBfLcvi8rSD1RXIMi0IBrT/+GJl8AaJlAph7/zH2N ngJFQpIECGK4vKglDyA1x2X14R9//aHUORug+x70cupdmR6pglLAtloz5eiaP0btG/+U 1hdQ== X-Gm-Message-State: AGRZ1gL7/oLobOkWLZ2eeEbE29p148b1EEFXyKhnUO6j6EZQkrEQGVLk GwLii8fkAnm3g7B81i1wzNxpxBxv X-Google-Smtp-Source: AJdET5eM3y+rPlKbOKxMLcc5ZSlV4tUJcqfn82LGwUANBoX/qYwtCxXGfI6++JxvSh5RF7Rdyya0GQ== X-Received: by 2002:a9d:3a5:: with SMTP id f34mr2029494otf.208.1542070875413; Mon, 12 Nov 2018 17:01:15 -0800 (PST) Return-Path: Received: from [192.168.0.234] (adsl-98-70-189-248.gnv.bellsouth.net. [98.70.189.248]) by smtp.gmail.com with ESMTPSA id y31sm7954965oty.78.2018.11.12.17.01.13 for (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 12 Nov 2018 17:01:14 -0800 (PST) Content-Type: multipart/alternative; boundary=Apple-Mail-A8363A85-D926-4BDF-BC89-925CF1D61DE0 Content-Transfer-Encoding: 7bit Mime-Version: 1.0 (1.0) Date: Mon, 12 Nov 2018 20:01:12 -0500 Subject: Re: [FlyRotary] Re: 1mm thrust washer Message-Id: References: In-Reply-To: To: Rotary motors in aircraft X-Mailer: iPad Mail (16A404) --Apple-Mail-A8363A85-D926-4BDF-BC89-925CF1D61DE0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Steve, If you stack the bearings up and turn one end of the stack, you can see h= ow the rpm is divided between the two needle bearings. It=E2=80=99s a fix t= o get a higher rpm limit. A single bearing is limited to something like 600= 0 rpm. That worked ok on the 2.176 drive where the engine was limited to th= at by prop limitations. The 2.85 drive lets the engine rev higher so... It was a design compromise. Tracy Sent from my iPad > On Nov 12, 2018, at 18:15, Steven W. Boese SBoese@uwyo.edu wrote: >=20 > Thank you Bobby for the RD1C image. >=20 > Since there is no fixed relationship between the relative motion of the tw= o stacked bearings (one of the bearings may not be doing anything except tak= ing up space), my question is: What is the advantage of having the bearing s= tack with the center washer trying to saw off the input shaft as opposed to u= sing a thicker single thrust bearing as in the RD1A? =20 >=20 > Steve Boese > From: Rotary motors in aircraft on behalf of= Charlie England ceengland7@gmail.com > Sent: Monday, November 12, 2018 4:00:05 PM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: 1mm thrust washer > =20 > Just so everyone's on the same page, Bobby's talking about wear on *the sh= aft* from the 1mm washer, which currently rides between the two thrust beari= ngs. The goal is to get a 3.5mm washer in that central spot. >=20 >> On 11/12/2018 4:39 PM, Bobby J. Hughes bhughes@qnsi.net wrote: >> >>=20 >> Steve, >>=20 >> I think the C drive bearing stack is different than the A series. I have o= bserved a small amount of wear on the aluminum=E2=80=99s plant from the 3.5 m= m rotating but it=E2=80=99s not measurable except by feel. For the C drive, r= eordering the bearing stack and locking the 1mm thrust washer should elimina= te potential wear at both locations. I=E2=80=99ve inspected four drives and 2= have some wear at the 1mm washer.=20 >>=20 >> Bobby=20 >>=20 >>=20 >> Sent from my iPad >>=20 >> On Nov 12, 2018, at 5:25 PM, Steven W. Boese SBoese@uwyo.edu wrote: >>=20 >>> As a result of following the messages concerning the input shaft thrust b= earing, I disassembled the RD1A reduction drive that was installed on my tes= t stand after spending 610 hours of flight time with a fixed pitch prop. Th= e input shaft thrust bearing setup on this unit appears to be similar those r= ecently discussed. >>> The attached photo shows the mounting plate having a pocket 0.006" deep w= orn into it by the thrust bearing. As recommended, conditions where the pro= p was driving the engine were deliberately minimized. Possibly I wasn't con= scientious enough about this. In any case, it would seem to be a good idea t= o fix the thrust washer to the mounting plate to avoid the wear I observed. = "Stickum" or a pressed fit into the proposed cup might be effective. If th= e wear rate I encountered was typical, a 2 mm deep pocket would be the resul= t after about 8000 hrs of operation thus requiring no additional machining. =F0= =9F=98=89 The photo also shows that the other end of the thrust bearing has b= een turning on the shoulder of the input shaft. This appears to be cosmetic= as the amount of bearing wear here was not measurable. The plastic snubber= did not show obvious damage. >>>=20 >>> The RD1A uses a single thrust bearing. I have found references to stack= ed thrust bearings being used to increase the axial load capacity of the bea= ring assembly, but this involves more than simply stacking normal individual= thrust bearings: >>> https://www.tackpoint.com/stacked-thrust-bearing-gallery/jtqo7l8j741jy1z= vu8abos9hziflyw >>> If the stacked thrust bearings are used to extend the reliable RPM range= of the assembly, I have found no references to this being standard practice= . There doesn't seem to be any guarantee of the relative speed of each bear= ing in the stack. What am I missing? >>>=20 >>> Steve Boese >>>=20 >>>=20 >>>=20 >>> =20 >>> =20 >>> From: Rotary motors in aircraft on behalf o= f Neil Unger 12348ung@gmail.com >>> Sent: Monday, November 12, 2018 1:48:32 PM >>> To: Rotary motors in aircraft >>> Subject: [FlyRotary] Re: 1mm thrust washer >>> =20 >>> =E2=97=86 This message was sent from a non-UWYO address. Please exercise= caution when clicking links or opening attachments from external sources. >>>=20 >>>=20 >>> Charlie, >>>=20 >>> Sounds simple, but to cut the depression in the plate a= ccurately will take a lot of setup time. Then whatever depression you cut w= ill have to be added to the nylon snubber washer and the whole gear train wi= ll be moved backwards as well. Couls end up time consuming and very messy I= MHO. >>>=20 >>> Neil. >>>=20 >>>=20 >>>> On 11/13/2018 2:53 AM, Charlie England ceengland7@gmail.com wrote: >>>> Could the same effect be achieved by milling a depression in the 1/2" p= late? How thick are the thicker washers; 2 mm? If so, mill a 1mm depression i= n the plate, and replace the thin 1 mm washer with a 3rd 2 mm washer. IIRC, L= ocktite makes a 'stickum' that could keep the washer embedded in the plate, s= o it doesn't un-nest when the shaft is unloaded. Would this excessively comp= romise the strength of the plate?=20 >>>>=20 >>>> Charlie >>>>=20 >>>>> On 11/12/2018 7:10 AM, Bobby J. Hughes bhughes@qnsi.net wrote: >>>>> Neil, >>>>>=20 >>>>> =20 >>>>>=20 >>>>> Looking good. The cup ID may need to be a few thousands over 52mm so n= ot sure if there=E2=80=99s room for a mounting spigot. Depending on material= thickness, the cup will fully enclose one of the 2MM bearings and part of t= he 3.5mm thrust washer. Possibly add oil path grooves to the front and rear o= f the cup at 45 degree clocking. Depending on the material thickness the cha= nnels may need to be offset. Oil channels may not be necessary. >>>>>=20 >>>>> =20 >>>>>=20 >>>>> Too early for wine but well caffeinated! >>>>>=20 >>>>> =20 >>>>>=20 >>>>> Bobby >>>>>=20 >>>>> =20 >>>>>=20 >>>>> =20 >>>>>=20 >>>>> From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]=20= >>>>> Sent: Monday, November 12, 2018 2:26 AM >>>>> To: Rotary motors in aircraft >>>>> Subject: [FlyRotary] Re: 1mm thrust washer >>>>>=20 >>>>> =20 >>>>>=20 >>>>> Kelly, I really should not draw freehand --- see if you can make sens= e of the scribble. Neil. >>>>>=20 >>>>> =20 >>>>>=20 >>>>> On 11/12/2018 4:15 PM, Kelly Troyer keltro@gmail.com wrote: >>>>>=20 >>>>> Neil and All, >>>>>=20 >>>>> Not sure I am visualizing the shape of the of the cup to encapsula= te the=20 >>>>>=20 >>>>> 1mm thrust washer but would certainly be a customer if Randy Kempf wer= e >>>>>=20 >>>>> to gear up to produce them........How about sketch of the proposed sha= pe >>>>>=20 >>>>> for those of us that are somewhat mechanically inept...........<:) >>>>>=20 >>>>> =20 >>>>>=20 >>>>> Kelly Troyer=20 >>>>>=20 >>>>> =20 >>>>>=20 >>>>> On Sun, Nov 11, 2018 at 6:52 PM Neil Unger 12348ung@gmail.com wrote: >>>>>=20 >>>>> Bobby, >>>>>=20 >>>>> Sorry I misunderstood you. By all means conta= ct=20 >>>>> Randy as he may be able to fit you in. He has a complete reduction=20= >>>>> drive of mine there to measure, and certainly has the machinery to ma= ke=20 >>>>> same. >>>>>=20 >>>>> Neil. >>>>>=20 >>>>>=20 >>>>> On 11/12/2018 7:41 AM, Bobby J. Hughes bhughes@qnsi.net wrote: >>>>> > Neil >>>>> > >>>>> > I was asking if Randy would consider making the 1mm washer mounting c= up. I have a chip detector but removed it due to the 1mm washer / shaft wear= creating fuzz every few hours and setting off an alert. I also measure the= gearbox oil temp output. >>>>> > >>>>> > Bobby >>>>> > >>>>> > Sent from my iPad >>>>> > >>>>> >> On Nov 11, 2018, at 3:15 PM, Neil Unger 12348ung@gmail.com wrote: >>>>> >> >>>>> >> Bobby, >>>>> >> >>>>> >> =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82= =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82= Another way is what I did, was to put a temp sensor in the pSRU which will= let you know if all is not well with elevated temps.=C3=82 This is standar= d in heavy trucks,=C3=82 One in the gear box, and one each in both diffs.=C3= =82 Simple and effective. >>>>> >> >>>>> >> Neil. >>>>> >> >>>>> >> >>>>> >>> On 11/12/2018 6:58 AM, Neil Unger wrote: >>>>> >>> Bobby, >>>>> >>> >>>>> >>> =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3= =82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3= =82 I put a magnet in the return line to catch any metal, but only got the "= fuzz" you are talking about so simply removed it. >>>>> >>> >>>>> >>> Will discuss with Randy re stocking a chip detector.=C3=82 That w= ill be his commercial decision. >>>>> >>> >>>>> >>> Neil. >>>>> >>> >>>>> >>> >>>>> >>>> On 11/12/2018 3:29 AM, Bobby J. Hughes bhughes@qnsi.net wrote: >>>>> >>>> Neil, >>>>> >>>> >>>>> >>>> That should work. I believe Tracy has suggested the same solution= . It would allow for replacing the 1mm washer if needed. I=C3=A2=E2=82=AC=E2= =84=A2m thinking aluminum instead of steel to minimize any wear on the washe= r outer edge if it rotated. I would like to start using my gearbox chip dete= ctor again. The 1mm washer shaft contact caused enough fuzz to activate it e= very few hours so I removed it. Would this be an item Randy Kempf would cons= ider supplying? We need four in Austin TX and I=C3=A2=E2=82=AC=E2=84=A2m sur= e others would retrofit if the part was available.=C3=82 The cup OD would n= eed to increased but I think we have plenty of room to accommodate modificat= ion. >>>>> >>>> >>>>> >>>> Thanks, >>>>> >>>> Bobby >>>>> >>>> >>>>> >>>> Sent from my iPad >>>>> >>>> >>>>> >>>>> On Nov 10, 2018, at 4:01 PM, Neil Unger 12348ung@gmail.com wrote: >>>>> >>>>> >>>>> >>>>> Bobby, >>>>> >>>>> >>>>> >>>>> =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3= =83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A= =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80= =9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2= =80=9A=C3=82 Tried my bearing blokes with no joy, over that size they are a= ll 1.5mm.=C3=83=E2=80=9A=C3=82 There is another way however if there is roo= m.=C3=83=E2=80=9A=C3=82 I suggest a small alloy (or steel) "cup" with mount= ing flanges like the washer you want, except in the middle the 1mm washer fi= ts flat against the mounting plate as usual, and the cup then tapers upwards= (after the 1mm thick retaining hole at the bottom ) and out slightly (for s= ay another 3mm?) to prevent the 1mm thrust washer to "jump out of bed" and m= oving sideways. If it does move forward the taper will force it back into pl= ace when the load comes on again.=C3=83=E2=80=9A=C3=82 My $0.02 worth, >>>>> >>>>> >>>>> >>>>> Neil. >>>>>=20 >>>>>=20 >>>>>=20 >>>>> =20 >>>>>=20 >>>>> =20 >>>>>=20 >>>>> =20 >>>>>=20 >>>>=20 >>>>=20 >>>> Virus-free. www.avast.com >>>=20 >>> >>> -- >>> Homepage: http://www.flyrotary.com/ >>> Archive and UnSub: http://mail.lancaironline.net:81/lists/flyrotary/Li= st.html >=20 --Apple-Mail-A8363A85-D926-4BDF-BC89-925CF1D61DE0 Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: quoted-printable Hi Steve,
   If you stack the= bearings up and turn one end of the stack, you can see how the rpm is divid= ed between the two needle bearings.  It=E2=80=99s a fix to get a higher= rpm limit.  A single bearing is limited to something like 6000 rpm. &n= bsp;That worked ok on the 2.176 drive where the engine was limited to that b= y prop limitations.  The 2.85 drive lets the engine rev higher so...

It was a design compromise.

= Tracy

Sent from my iPad

On Nov 12, 2018, at 18:15, Steven W. Boese SBoese@uwyo.edu <flyrotary@lancaironline.net> wrote:

=

Thank you Bobby for the RD1C image= .


Since there is no fixed relationsh= ip between the relative motion of the two stacked bearings (one of the beari= ngs may not be doing anything except taking up space), my question is: = What is the advantage of having the bearing stack with the center washer trying to saw off the input shaft as o= pposed to using a thicker single thrust bearing as in the RD1A?  


Steve Boese

From: Rotary motors in aircra= ft <flyrotary@lancaironlin= e.net> on behalf of Charlie England ceengland7@gmail.com <flyrotary@lancaironline.net>
Sent: Monday, November 12, 2018 4:00:05 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: 1mm thrust washer
 
Just so everyone's on the same page, Bobby'= s talking about wear on *the shaft* from the 1mm washer, which currently rid= es between the two thrust bearings. The goal is to get a 3.5mm washer in tha= t central spot.

On 11/12/2018 4:39 PM, Bobby J. Hughes bhughes@qnsi.net wrote:
<image1.png>

Steve,

I think the C drive bearing stack is different than th= e A series. I have observed a small amount of wear on the aluminum=E2=80=99s= plant from the 3.5 mm rotating but it=E2=80=99s not measurable except by fe= el. For the C drive, reordering the bearing stack and locking the 1mm thrust washer should eliminate potential wear at both l= ocations. I=E2=80=99ve inspected four drives and 2 have some wear at the 1mm= washer. 

Bobby 


Sent from my iPad

On Nov 12, 2018, at 5:25 PM, Steven W. Boese SBoese@uwyo.edu <f= lyrotary@lancaironline.net> wrote:

As a result of following the mess= ages concerning the input shaft thrust bearing, I disassembled the RD1A redu= ction drive that was installed on my test stand after spending 610 hours of f= light time with a fixed pitch prop.  The input shaft thrust bearing setup on this unit appears to be= similar those recently discussed.

The attached photo shows the moun= ting plate having a pocket 0.006" deep worn into it by the thrust bearing.&n= bsp; As recommended, conditions where the prop was driving the engine were d= eliberately minimized.  Possibly I wasn't conscientious enough about this.  In any case, it would seem to be a g= ood idea to fix the thrust washer to the mounting plate to avoid the wear I o= bserved.  "Stickum" or a pressed fit into the proposed cup might be eff= ective.  If the wear rate I encountered was typical, a 2 mm deep pocket would be the result after about 8000 hrs of= operation thus requiring no additional machining. =F0=9F=98=89 The photo also shows that the other end of the thr= ust bearing has been turning on the shoulder of the input shaft.  This a= ppears to be cosmetic as the amount of bearing wear here was not measurable.=   The plastic snubber did not show obvious damage.


The RD1A uses a single thrust bea= ring.  I have found references to stacked thrust bearings being used to= increase the axial load capacity of the bearing assembly, but this involves= more than simply stacking normal individual thrust bearings:

https://www.tackpoint.com/stacked-thrust-b= earing-gallery/jtqo7l8j741jy1zvu8abos9hziflyw

If the stacked thrust bearings ar= e used to extend the reliable RPM range of the assembly, I have found no ref= erences to this being standard practice.  There doesn't seem to be any g= uarantee of the relative speed of each bearing in the stack.  What am I missing?


Steve Boese




    

  

From: Rotary motors in airc= raft <flyrotary@lancaironl= ine.net> on behalf of Neil Unger 12348ung@gmail.com <flyrotary@lancaironline.net>
Sent: Monday, November 12, 2018 1:48:32 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: 1mm thrust washer
 

=E2=97=86 This mess= age was sent from a non-UWYO address. Please exercise caution when clicking l= inks or opening attachments from external sources.


Charlie,

            &= nbsp;    Sounds simple, but to cut the depression in the plat= e accurately will take a lot of setup time.  Then whatever depression y= ou cut will have to be added to the nylon snubber washer and the whole gear t= rain will be moved backwards as well.  Couls end up time consuming and very messy IMHO.

Neil.


On 11/13/2018 2:53 AM, Charlie England ceengland7@gmail.com wrote:
Could the same effect be achieved by mill= ing a depression in the 1/2" plate? How thick are the thicker washers; 2 mm?= If so, mill a 1mm depression in the plate, and replace the thin 1 mm washer= with a 3rd 2 mm washer. IIRC, Locktite makes a 'stickum' that could keep the washer embedded in the plate= , so it doesn't un-nest when the shaft is unloaded. Would this excessively c= ompromise the strength of the plate?

Charlie

On 11/12/2018 7:10 AM, Bobby J. Hughes bhughes@qnsi.net wrote:

Neil,

 

Looking good. The cup= ID may need to be a few thousands over 52mm so not sure if there=E2=80=99s r= oom for a mounting spigot. Depending on material thickness,  the cup will fully enclose one of the 2MM bearings and part of the 3.= 5mm thrust washer. Possibly add oil path grooves to the front and rear of th= e cup at 45 degree clocking. Depending on the material thickness the channel= s may need to be offset. Oil channels may not be necessary.

 

Too early for wine bu= t well caffeinated!

 

Bobby

 

 

From:= Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]
Sent: Monday, November 12, 2018 2:26 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: 1mm thrust washer

 

Kelly,  I really should not draw freehand --- see if you can make se= nse of the scribble.  Neil.

 

On 11/12/2018 4:15 PM, Kelly Troyer keltro@gmail.com wrote:

Neil and All,

    Not sure I am visualizing the shape= of the of the cup to encapsulate the 

1mm thrust washer but would certainly be a custom= er if Randy Kempf were

to gear up to produce them........How about sketc= h of the proposed shape

for those of us that are somewhat mechanically in= ept...........<:)

 

Kelly Troyer 

 

On Sun, Nov 11, 2018 at 6:52 PM Neil Unger 12348ung@gmail.com <flyrotary@lancaironline.net>= wrote:

Bobby,

            &nbs= p;           Sorry I misun= derstood you.  By all means contact
Randy as he may be able to fit you in.  He has a complete reduction drive of mine there to measure,  and certainly has the machinery to mak= e
same.

Neil.


On 11/12/2018 7:41 AM, Bobby J. Hughes bhughes@qnsi.net wrote:
> Neil
>
> I was asking if Randy would consider making the 1mm washer mounting cup= . I have a chip detector but removed it due to the 1mm washer / shaft wear c= reating fuzz every few hours and setting off an alert.  I also measure t= he gearbox oil temp output.
>
> Bobby
>
> Sent from my iPad
>
>> On Nov 11, 2018, at 3:15 PM, Neil Unger 12348ung@gmail.com <flyrotary@lancair= online.net> wrote:
>>
>> Bobby,
>>
>> =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82= =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82=   Another way is what I did, was to put a temp sensor in the pSRU which= will let you know if all is not well with elevated temps.=C3=82  This i= s standard in heavy trucks,=C3=82  One in the gear box, and one each in= both diffs.=C3=82  Simple and effective.
>>
>> Neil.
>>
>>
>>> On 11/12/2018 6:58 AM, Neil Unger wrote:
>>> Bobby,
>>>
>>> =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3= =82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3=82 =C3= =82  I put a magnet in the return line to catch any metal, but only got= the "fuzz" you are talking about so simply removed it.
>>>
>>> Will discuss with Randy re stocking a chip detector.=C3=82 = ; That will be his commercial decision.
>>>
>>> Neil.
>>>
>>>
>>>> On 11/12/2018 3:29 AM, Bobby J. Hughes bhughes@qnsi.net wrote:
>>>> Neil,
>>>>
>>>> That should work. I believe Tracy has suggested the same so= lution. It would allow for replacing the 1mm washer if needed. I=C3=A2=E2=82= =AC=E2=84=A2m thinking aluminum instead of steel to minimize any wear on the= washer outer edge if it rotated. I would like to start using my gearbox chip detector again. The 1mm washer shaft contact caused enough f= uzz to activate it every few hours so I removed it. Would this be an item Ra= ndy Kempf would consider supplying? We need four in Austin TX and I=C3=A2=E2= =82=AC=E2=84=A2m sure others would retrofit if the part was available.=C3=82  The cup OD would need to increased but I th= ink we have plenty of room to accommodate modification.
>>>>
>>>> Thanks,
>>>> Bobby
>>>>
>>>> Sent from my iPad
>>>>
>>>>> On Nov 10, 2018, at 4:01 PM, Neil Unger 12348ung@gmail.com <flyrotary@lancair= online.net> wrote:
>>>>>
>>>>> Bobby,
>>>>>
>>>>> =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2= =80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83= =E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3= =83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A =C3=83=E2=80=9A= =C3=83=E2=80=9A=C3=82  Tried my bearing blokes with no joy, over that s= ize they are all 1.5mm.=C3=83=E2=80=9A=C3=82  There is another way howe= ver if there is room.=C3=83=E2=80=9A=C3=82  I suggest a small alloy (or= steel) "cup" with mounting flanges like the washer you want, except in the middle the 1mm washer fits flat against t= he mounting plate as usual, and the cup then tapers upwards (after the 1mm t= hick retaining hole at the bottom ) and out slightly (for say another 3mm?) t= o prevent the 1mm thrust washer to "jump out of bed" and moving sideways. If it does move forward the taper= will force it back into place when the load comes on again.=C3=83=E2=80=9A=C3= =82  My $0.02 worth,
>>>>>
>>>>> Neil.


 

 

 



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