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ONE OTHER IMPORTANT FACTOR IN SMOOTH RUNNING, RELIABLE ENGINES IS=0ABALA=
NCE (some call it blueprinting but that encompasses many changes)=0AWhen=
the machine shop did my original crank, they first magnafluxed=0Ait, an=
d then turned it to .020. I provided the flywheel, and front=0Apulley, a=
s well as the clutch cover and disc and they used those=0Acomponents to=
"balance" the engine. The markings on the flywheel and=0Aclutch were us=
ed in assembly to put all correctly in balanced position=0Aand the engin=
e runs very smoothly, for a four, and sounds great. I=0Awould recommend=
this procedure when rebuilding.=0AThink about all the weight being thro=
wn around at the rear of the=0Aengine, and just a small pulley up front.=
Adding more mass to the=0Afront can't be a bad thing, but if you do as=
Donald instructed, and=0Adon't rev over 4500RPMS when racing, the engin=
e will last a long time.=0AThe 100 flywheel is one serious hunk of metal=
.=0AOn the first 6-cyl. engines, Geoff Healey said if they revved it ove=
r=0A4000 they were afraid the vibration would blow apart. The went back=
to=0AMorris Motors and the solution then was to thicken the back plate.=
I=0Adon't know much about the engineering of rotation but the word=0A"s=
mooth" seems to fit the best. Hank=0A=0A=09-----------------------------=
------------From: "WILLIAM B LAWRENCE" =0ATo: "josef-eckert--- via Heale=
ys", "Bob Spidell",=0A"gradea1@charter.net", "josef-eckert@t-online.de"=
=0ACc: =0ASent: Saturday October 30 2021 10:17:08PM=0ASubject: Re: [Heal=
eys] Crankshaft=0A=0A DW sells a vibration damper for the 4 cylinder. =
=0A When I built my engine I used the belt pulley system from a six=
=0Abecause one of the vibration sources on the four is the heavy, old=0A=
school, implement belt that is standard. I found all three pulleys fit=
=0Awith only a minor mod to the water pump pulley. It may be the placebo=
=0Aeffect but I really think the engine runs more smoothly with the=0Ana=
rrower belt. I considered using the vibration damper from the six=0Aalso=
, but it=E2=80=99s a little chancy to install one without analyzing the=
=0Avibration characteristics of the crank and matching the damper to it.=
=0AThe DW damper is tailored to the four cylinder crank. =0A Bill Lawr=
ence BN1 #554 =0A-------------------------=0AFROM: Healeys on behalf o=
f josef-eckert--- via Healeys =0ASENT: Saturday, October 30, 2021 6:44 P=
M=0ATO: Bob Spidell ; gradea1@charter.net =0ACC: healeys@autox.team.net=
=0ASUBJECT: Re: [Healeys] Crankshaft =0A=0A=09 Is there a need for=
one? Never needed one on my 100.=0A=0A=09-----Original-Nachricht-----=
=0A=0A=09Betreff: Re: [Healeys] Crankshaft =0A=0A=09Datum: 2021-10-30T2=
0:34:14+0200 =0A=0A=09Von: "Bob Spidell via Healeys" =0A=0A=09An: "grad=
ea1@charter.net" =0A=0A=09 Begs the question: Anyone make an afterm=
arket balancer for the=0A100s? Without looking, I think there=E2=80=99s=
enough room for one. =0AOn Oct 30, 2021, at 10:17 AM, Henry G Leach via=
Healeys wrote:=0A=0A The "weakness" in the original 100, A-90 cranks=
haft was the lack of=0Aa harmonic balancer, coupled with a huge heavy fl=
ywheel. More than=0Alikely, the crank that was sought after for replacem=
ent, had cracks=0Anear the rear main area where it vibrated itself to de=
ath. A case for=0Anot revving the engine over 4000 rpms. (Donald Healey=
set strict=0Aorders for all his racers to keep the revs down). They (=
BMC) fixed=0Aall that, or should I say Morris Motors, fixed it by adding=
the=0Aharmonic balancer to the early 100-6 engine. Too bad they lost po=
ints=0Ain other areas, but by the time the 2912cc engine was developed,=
they=0Adid in fact fix all that...best six made! Hank=0A=0A=09---------=
-------------------------------- From: "David Porter via=0AHealeys" =0A=
To: "Michael MacLean", "healeys@autox.team.net"=0A Cc:=0A Sent: Saturda=
y October 30 2021 4:20:15AM=0A Subject: Re: [Healeys] Crankshaft=0A=0A=
=09Don't over think this. Just because it will rev much better doesn't=
=0Amean it gets used all the time, but it's there. Of course the additio=
n=0Aof other lighter bits and an AL head and expensive harmonic balancer=
=0Awill have you at a greater expense. Speed costs money, how fast do yo=
u=0Awant to go?. The AH four makes excellent bottom end torque. The huge=
=0Amain caps handle it just fine. The original crank is the weak link. D=
P=0A=0A=0A On October 30, 2021, at 3:22 AM, Michael MacLean via Healeys=
wrote:=0A=0A Wouldn't you have to beef up the main caps and add strap=
s across=0Athem to handle the crank in higher RPM? Just a thought with o=
nly 3=0Amain bearings and no harmonic balancer. Mike MacLean =0A On Fri=
, Oct 29, 2021 at 8:48 PM WILLIAM B LAWRENCE via Healeys =0Awrote: I=
=E2=80=99d say it doesn=E2=80=99t transform the engine by itself, but it=
=0Aprovides a stronger basis for the other mods that will. Bill=0ALawr=
ence BN1 #554 =0A-------------------------=0A FROM: Healeys on behalf o=
f Bob Spidell via Healeys =0ASENT: Saturday, October 30, 2021 1:16 AM=0A=
TO: richard mayor =0ACC: healeys@autox.team.net =0ASUBJECT: Re: [Healeys=
] Crankshaft Does it de-stroke the engine=0A(shorter throws)? =
=0AOn Oct 29, 2021, at 5:05 PM, richard mayor via Healeys wrote:=0A=0A=
But a lightened flywheel will get you there quicker. =0A On Fri, Oct=
29, 2021 at 3:19 PM Michael Salter via Healeys wrote: =0ADavid, how do=
es changing the crankshaft give you 2000 additional RPM?=0ALighter rods=
and pistons, balancing, cam timing, bigger valves,=0Aporting, bigger ca=
rbs, shorter stroke, even increased compression may=0Aall contribute to=
higher RPM but a crank alone will not make any=0Adifference, neither wi=
ll a lightened flywheel. M =0A On Fri., Oct. 29, 2021, 6:03 p.m. David=
P via Healeys, wrote: =0A=0A=09lighter, stronger, 2000+ additional r=
pms ,add a wee bit of cam and=0Aits a stormer and looks dead stock.. add=
a real seal and go have some=0Afun. As I said IMHO.. It ain't cheap. dp=
I understand one is going on=0ABAT in the near future. Black over red..=
On 10/29/2021 3:25 PM,=0AMichael Salter via Healeys wrote: Confirmatio=
n bias is a very=0Apowerful force. M =0A On Fri., Oct. 29, 2021, 3:35=
p.m. Bob Spidell via Healeys, wrote: =0AOK, I'll bite: How does a Welc=
h crank transform a a 100? I get that=0A they're steel and stronger, and=
should withstand more RPM/HP, but=0Adoes=0A the crank alone do it?=0A=
=0A Bob=0A=0A On 10/29/2021 8:10 AM, David P via Healeys wrote:=0A >=0A=
> pretty much hen's teeth is my guess. But a Welsh crank, it=0Atransfor=
ms=0A > the engine. IMHO I'm sure Donald wishes they were available in '=
54=0A >=0A > On 10/28/2021 2:29 PM, Robert Memler via Healeys wrote:=0A=
>> I need a crankshaft for a 54 b;no. Does anyone have a spare that=0At=
hey=0A >> would be willing to sell?=0A >>=0A >> Thanks, Bob Memler=0A >>=
=0A=0A _______________________________________________=0A Support Team.N=
et [1] [2]http://www.team.net/donate.html [3]=0A Suggested annual donat=
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lank">http://autox.team.net/mailman/options/healeys/frogeye@porterscusto=
m.com=0A[23]=0A=0A --=0A Porter Custom Bicycles 2909 Arno St. NE Albuque=
rque, NM. 505-352-1378=0AMy World go here: rel=3D"noreferrer" target=3D=
=0A "_blank">WWW.PORTERBIKES.COM/=0A____________________________________=
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--=_1301f9698a091d834123df42f8c61e27
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<html><body>One other important factor in smooth running, reliable engin=
es is <b>balance</b> (some call it blueprinting but that encompasses man=
y changes)<div><br></div><div>When the machine shop did my original cran=
k, they first magnafluxed it, and then turned it to .020. I provided the=
flywheel, and front pulley, as well as the clutch cover and disc and th=
ey used those components to "balance" the engine. The markings on the fl=
ywheel and clutch were used in assembly to put all correctly in balanced=
position and the engine runs very smoothly, for a four, and sounds grea=
t. I would recommend this procedure when rebuilding.</div><div><br></div=
><div>Think about all the weight being thrown around at the rear of the=
engine, and just a small pulley up front. Adding more mass to the front=
can't be a bad thing, but if you do as Donald instructed, and don't rev=
over 4500RPMS when racing, the engine will last a long time. The 100 fl=
ywheel is one serious hunk of metal.</div><div><br></div><div>On the fir=
st 6-cyl. engines, Geoff Healey said if they revved it over 4000 they we=
re afraid the vibration would blow apart. The went back to Morris Motors=
and the solution then was to thicken the back plate. I don't know much=
about the engineering of rotation but the word "smooth" seems to fit th=
e best. Hank<br><div><div><br><div class=3D"reply-new-signature"></div><=
p>-----------------------------------------</p>From: "WILLIAM B LAWRENCE=
" <ynotink@msn.com><br>To: "josef-eckert--- via Healeys", "Bob Spidell",=
"gradea1@charter.net", "josef-eckert@t-online.de"<br>Cc: <br>Sent: Satu=
rday October 30 2021 10:17:08PM<br>Subject: Re: [Healeys] Crankshaft<br>=
<br>=0A<div style=3D"font-family:'segoe ui westeuropean', 'segoe ui', he=
lvetica, arial, sans-serif;font-size:12pt;color:rgb(0,0,0);">=0ADW sells=
a vibration damper for the 4 cylinder. </div>=0A<div style=3D"font=
-family:'segoe ui westeuropean', 'segoe ui', helvetica, arial, sans-seri=
f;font-size:12pt;color:rgb(0,0,0);">=0A<br></div>=0A<div style=3D"font-f=
amily:'segoe ui westeuropean', 'segoe ui', helvetica, arial, sans-serif;=
font-size:12pt;color:rgb(0,0,0);">=0AWhen I built my engine I used the b=
elt pulley system from a six=0Abecause one of the vibration sources on t=
he four is the heavy, old=0Aschool, implement belt that is standard. I f=
ound all three pulleys=0Afit with only a minor mod to the water pump pul=
ley. It may be the=0Aplacebo effect but I really think the engine runs m=
ore smoothly=0Awith the narrower belt. I considered using the vibration=
damper=0Afrom the six also, but it=E2=80=99s a little chancy to install=
one without=0Aanalyzing the vibration characteristics of the crank and=
matching=0Athe damper to it. The DW damper is tailored to the four cyli=
nder=0Acrank.</div>=0A<div style=3D"font-family:'segoe ui westeuropean',=
'segoe ui', helvetica, arial, sans-serif;font-size:12pt;color:rgb(0,0,0=
);">=0A<br></div>=0A<div style=3D"font-family:'segoe ui westeuropean', '=
segoe ui', helvetica, arial, sans-serif;font-size:12pt;color:rgb(0,0,0);=
">=0ABill Lawrence</div>=0A<div style=3D"font-family:'segoe ui westeurop=
ean', 'segoe ui', helvetica, arial, sans-serif;font-size:12pt;color:rgb(=
0,0,0);">=0ABN1 #554</div>=0A<hr style=3D"width:98%;"><div dir=3D"ltr"><=
font face=3D"Calibri, sans-serif" style=3D"font-size:11pt;" color=3D"#00=
0000"><b>From:</b> Healeys=0A<healeys-bounces@autox.team.net> on b=
ehalf of josef-eckert---=0Avia Healeys <healeys@autox.team.net><br=
><b>Sent:</b> Saturday, October 30, 2021 6:44 PM<br><b>To:</b> Bob Spide=
ll <bspidell@comcast.net>;=0Agradea1@charter.net <gradea1@chart=
er.net><br><b>Cc:</b> healeys@autox.team.net=0A<healeys@autox.team=
.net><br><b>Subject:</b> Re: [Healeys] Crankshaft</font>=0A<div> =
;</div>=0A</div>=0A<div>=0A<p style=3D"margin:0px;"><span style=3D"font-=
family:arial, helvetica, sans-serif;font-size:10pt;color:#000000;text-de=
coration:none;">=0AIs there a need for one? Never needed one on my 100.<=
br></span></p>=0A<p style=3D"margin:0px;"><span style=3D"font-family:ari=
al, helvetica, sans-serif;font-size:10pt;color:#000000;text-decoration:n=
one;">=0A </span></p>=0A<p style=3D"margin:0px;"> </p>=0A<p st=
yle=3D"margin:0px;"> </p>=0A<p style=3D"margin:0px;">-----Original-=
Nachricht-----</p>=0A<p style=3D"margin:0px;">Betreff: Re: [Healeys] Cra=
nkshaft</p>=0A<p style=3D"margin:0px;">Datum: 2021-10-30T20:34:14+0200</=
p>=0A<p style=3D"margin:0px;">Von: "Bob Spidell via Healeys"=0A<heale=
ys@autox.team.net></p>=0A<p style=3D"margin:0px;">An: "gradea1@charte=
r.net"=0A<gradea1@charter.net></p>=0A<p style=3D"margin:0px;">&nbs=
p;</p>=0A<p style=3D"margin:0px;"> </p>=0A<p style=3D"margin:0px;">=
</p>=0A<div>=0A<div dir=3D"ltr"> </div>=0A<div dir=3D"ltr">Be=
gs the question: Anyone make an aftermarket=0Abalancer for the 100s? Wit=
hout looking, I think there=E2=80=99s enough room=0Afor one.</div>=0A<di=
v dir=3D"ltr"><br><blockquote>On Oct 30, 2021, at 10:17 AM, Henry G Leac=
h via Healeys=0A<healeys@autox.team.net> wrote:<br><br></blockquot=
e>=0A</div>=0A<blockquote>=0A<div dir=3D"ltr">The "weakness" in the orig=
inal 100, A-90 crankshaft=0Awas the lack of a harmonic balancer, coupled=
with a huge heavy=0Aflywheel. More than likely, the crank that wa=
s sought after=0Afor replacement, had cracks near the rear main area whe=
re it=0Avibrated itself to death. A case for not revving the engine over=
=0A4000 rpms. (Donald Healey set strict orders for all his racers to=0Ak=
eep the revs down).=0A<div> </div>=0A<div>They (BMC) fixed all that=
, or should I say Morris Motors,=0Afixed it by adding the harmonic balan=
cer to the early 100-6=0Aengine. Too bad they lost points in other=
areas, but by the=0Atime the 2912cc engine was developed, they did in f=
act fix all=0Athat...best six made! Hank<br><br><div class=3D"x_re=
ply-new-signature"> </div>=0A<p style=3D"margin:0px;">-------------=
----------------------------</p>=0AFrom: "David Porter via Healeys" <=
healeys@autox.team.net><br>=0ATo: "Michael MacLean", "healeys@autox.t=
eam.net"<br>=0ACc:<br>=0ASent: Saturday October 30 2021 4:20:15AM<br>=0A=
Subject: Re: [Healeys] Crankshaft<br><br><p dir=3D"ltr" style=3D"margin:=
0px;"><span style=3D"font-family:Calibri;">Don't over think this. Just b=
ecause it will=0Arev much better doesn't mean it gets used all the time,=
but it's=0Athere. Of course the addition of other lighter bits and an A=
L head=0Aand expensive harmonic balancer will have you at a greater expe=
nse.=0ASpeed costs money, how fast do you want to go?. The AH four makes=
=0Aexcellent bottom end torque. The huge main caps handle it just=0Afine=
. The original crank is the weak link. DP</span></p>=0A<span style=3D"fo=
nt-family:Calibri;"><br><br>=0AOn October 30, 2021, at 3:22 AM, Michael=
MacLean via Healeys=0A<healeys@autox.team.net> wrote:<br><br><br>=
</span>=0A<div dir=3D"ltr">=0A<div>Wouldn't you have to beef up the main=
caps and add straps=0Aacross them to handle the crank in higher RPM?&nb=
sp; Just a thought=0Awith only 3 main bearings and no harmonic balancer.=
</div>=0A<div>Mike MacLean</div>=0A</div>=0A<br><div class=3D"x_gmail_qu=
ote">=0A<div class=3D"x_gmail_attr" dir=3D"ltr">On Fri, Oct 29, 2021 at=
8:48 PM=0AWILLIAM B LAWRENCE via Healeys=0A<<a>healeys@autox.team.ne=
t</a>> wrote:</div>=0A<blockquote class=3D"x_gmail_quote" style=3D"ma=
rgin:0px 0px 0px .8ex;border-left:1px solid #cccccc;padding-left:1ex;">=
=0A<div>=0A<div>I=E2=80=99d say it doesn=E2=80=99t transform the engine=
by itself, but it=0Aprovides a stronger basis for the other mods that w=
ill.</div>=0A<div> </div>=0A<div>Bill Lawrence</div>=0A<div>BN1 #55=
4</div>=0A<hr style=3D"width:98%;"><div dir=3D"ltr"><span style=3D"font-=
size:11pt;color:#000000;font-family:Calibri, sans-serif;"><strong>=0AFro=
m:</strong> Healeys=0A<<a>healeys-bounces@autox.team.net</a>> on b=
ehalf of Bob=0ASpidell via Healeys <<a>healeys@autox.team.net</a>>=
<br><strong>Sent:</strong> Saturday, October 30, 2021 1:16 AM<br><strong=
>To:</strong> richard mayor=0A<<a>boyracer466@gmail.com</a>><br><s=
trong>Cc:</strong> <a>healeys@autox.team.net</a>=0A<<a>healeys@autox.=
team.net</a>><br><strong>Subject:</strong> Re: [Healeys] Crankshaft</=
span>=0A<div> </div>=0A</div>=0A<div>=0A<div dir=3D"ltr"> </di=
v>=0A<div dir=3D"ltr">Does it de-stroke the engine (shorter throws)?</di=
v>=0A<div dir=3D"ltr"> </div>=0A<div dir=3D"ltr"><br><blockquote>On=
Oct 29, 2021, at 5:05 PM, richard mayor via Healeys=0A<<a>healeys@au=
tox.team.net</a>> wrote:<br><br></blockquote>=0A</div>=0A<blockquote>=
=0A<div dir=3D"ltr">=0A<div dir=3D"ltr">But a lightened flywheel will ge=
t you there=0Aquicker.</div>=0A<br><div>=0A<div dir=3D"ltr">On Fri, Oct=
29, 2021 at 3:19 PM Michael Salter via=0AHealeys <<a>healeys@autox.t=
eam.net</a>> wrote:</div>=0A<blockquote style=3D"margin:0px 0px 0px .=
8ex;border-left:1px solid #cccccc;padding-left:1ex;">=0A<div>David, how=
does changing the crankshaft give you 2000=0Aadditional RPM?=0A<div>Lig=
hter rods and pistons, balancing, cam timing, bigger=0Avalves, porting,=
bigger carbs, shorter stroke, even increased=0Acompression may al=
l contribute to higher RPM but a crank alone will=0Anot make any differe=
nce, neither will a lightened=0Aflywheel. </div>=0A<div>M</div>=0A<=
/div>=0A<br><div>=0A<div dir=3D"ltr">On Fri., Oct. 29, 2021, 6:03 p.m. D=
avid P via=0AHealeys, <<a>healeys@autox.team.net</a>> wrote:</div>=
=0A<blockquote style=3D"margin:0px 0px 0px .8ex;border-left:1px solid #c=
ccccc;padding-left:1ex;">=0A<div>=0A<p style=3D"margin:0px;">lighter, st=
ronger, 2000+ additional rpms ,add=0Aa wee bit of cam and its a stormer=
and looks dead stock.. add a=0Areal seal and go have some fun. As=
I said IMHO.. It ain't=0Acheap. dp I understand one is going on B=
AT in the near=0Afuture. Black over red..</p>=0A<div>On 10/29/2021 3:25=
PM, Michael Salter via Healeys wrote:</div>=0A<blockquote>=0A<div>Confi=
rmation bias is a very powerful force.=0A<div> </div>=0A<div>M</div=
>=0A</div>=0A<br><div>=0A<div dir=3D"ltr">On Fri., Oct. 29, 2021, 3:35 p=
.m. Bob Spidell via=0AHealeys, <<a>healeys@autox.team.net</a>> wro=
te:</div>=0A<blockquote style=3D"margin:0px 0px 0px .8ex;border-left:1px=
solid #cccccc;padding-left:1ex;">=0AOK, I'll bite: How does a Welch cra=
nk transform a a 100? I get=0Athat<br>=0Athey're steel and stronger, and=
should withstand more RPM/HP, but=0Adoes<br>=0Athe crank alone do it?<b=
r><br>=0ABob<br><br>=0AOn 10/29/2021 8:10 AM, David P via Healeys wrote:=
<br>=0A><br>=0A> pretty much hen's teeth is my guess. But a Welsh=
crank, it=0Atransforms<br>=0A> the engine. IMHO I'm sure Donal=
d wishes they were=0Aavailable in '54<br>=0A><br>=0A> On 10/28/202=
1 2:29 PM, Robert Memler via Healeys wrote:<br>=0A>> I need a cran=
kshaft for a 54 b;no. Does anyone have a=0Aspare that they<br>=0A>>=
; would be willing to sell?<br>=0A>><br>=0A>> Thanks, Bob Me=
mler<br>=0A>><br><br>=0A__________________________________________=
_____<br>=0ASupport <a href=3D"http://Team.Net";>Team.Net</a> <a href=3D"=
te.html">http://www.team.net/donate.html</a><br>=0ASuggested annual dona=
tion $12.75<br><br>=0AArchive: <a href=3D"http://www.team.net/pipe=
rmail/healeys"></a><a href=3D"http://www.team.net/pipermail/healeys";>htt=
p://www.team.net/pipermail/healeys</a> <a href=3D"http://autox.team.net/=
archive"></a><a href=3D"http://autox.team.net/archive";>http://autox.team=
.net/archive</a><br><br><a>Healeys@autox.team.net</a><br><a href=3D"http=
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ttp://autox.team.net/mailman/options/healeys/michaelsalter@gmail.com</a>=
<br><br></blockquote>=0A</div>=0A<br>=0A________________________________=
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ml</a><br>=0ASuggested annual donation $12.75<br><br>=0AArchive: "norefe=
rrer" target=3D"_blank"> "<a href=3D"http://www.team.net/pipermail/he=
aleys">http://www.team.net/pipermail/healeys";</a> target=3D<br>=0A"_blan=
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utox.team.net/archive</a><br><br>=0A"_blank">Healeys@autox.team.net<b=
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lman/options/healeys/frogeye@porterscustom.com"</a><br>=0A=0Arel=3D"nore=
ferrer" target=3D"_blank"> "<a href=3D"http://autox.team.net/mailman/=
options/healeys/frogeye@porterscustom.com">http://autox.team.net/mailman=
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frogeye@porterscustom.com">http://autox.team.net/mailman/options/healeys=
/frogeye@porterscustom.com</a><br><br></blockquote>=0A--<br>=0APorter Cu=
stom Bicycles 2909 Arno St. NE Albuquerque, NM.=0A505-352-1378 My World=
go here: rel=3D"noreferrer" target=3D<br>=0A"_blank">WWW.PORTERBIKES=
.COM/</div>=0A_______________________________________________<br>=0ASupp=
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