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[Healeys] FW: Drum Brakes

To: healeys <healeys@autox.team.net>
Subject: [Healeys] FW: Drum Brakes
From: richard mayor <mayorrichard@hotmail.com>
Date: Thu, 29 Jan 2015 02:26:34 +0000
Delivered-to: mharc@autox.team.net
Delivered-to: healeys@autox.team.net
Importance: Normal
References: <009601d03b21$bde1dd40$39a597c0$@com>, <CAFBXTk+rwYZeoiDb5fP0mA2TR+Lrg0avyP_RxTpP_MGuaekguA@mail.gmail.com> FILETIME=[005C41D0:01D03B6B]
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Any race is bad with drum brakes. They just get hot and will fade. So=2C ra=
cers do not use their brakes sometimes. They would throw their car sideways=
 into the turns and let their tires scrub off speed. As the drums and shoes=
 cool down they would begin to work again. I've been there!
But to answer your question..... in The 24 hours of LeMans I'm sure there w=
ere complete changes to drums and shoes in the 30's=2C 40's and the early 5=
0's.  Remember=2C that early 50's race incident at LeMans (1954?)  with the=
 Mercedes=2C Healey and Jaguar=2C  where about 80 spectators were killed=2C=
 only the Mercedes had drum brakes.  The Healey 100 and the Jaguar both had=
 disc brakes. =20

Richard Mayor=20

Date: Thu=2C 29 Jan 2015 09:48:44 +0800
From: healey.nut@gmail.com
To: steveg@abrazosdata.com
CC: healeys@autox.team.net
Subject: Re: [Healeys] Drum Brakes

I'm sure LeMans was murder on drums=2C anyone know if they would replace th=
e brakes in those days during the course of the race?

On Thursday=2C January 29=2C 2015=2C Steve Gerow <steveg@abrazosdata.com> w=
rote:
IMHO the basic issue with advanced drum brakes is complexity (i.e. cost).  =
Late =9150s early =9160s Alfas had aluminum alfin drums with diagonal fins =
with cast-in steel liners and cast aluminum triple-leading shoes. That=92s =
6 cylinders on the fronts alone. The ATE discs Alfa and Porsche adopted pro=
vided equivalent or better stopping power at less complexity and cost. I he=
ard later Porsche=92s reason for going with discs was cost. As a side note=
=2C In the =9170s=2C Phil Hill said the drums on Grand Prix cars would go a=
way part way through the race=3B in combination with burning up 60 gallons =
of fuel in a rear tank=2C this made for pretty interesting handling. -- Ste=
ve GerowAltadena=2C CA=2C USABN6Check out my galleries:http://www.pbase.com=
/stevegerow/ =0A=

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ard@hotmail.com                                           =

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<body class=3D'hmmessage'><div dir=3D'ltr'>Any race is bad with drum brakes=
. They just get hot and will fade. So=2C racers do not use their brakes som=
etimes. They would throw their car sideways into the turns and let their ti=
res scrub off speed. As the drums and shoes cool down they would begin to w=
ork again. I've been there!<br>But to answer your question..... in The 24 h=
ours of LeMans I'm sure there were complete changes to drums and shoes in t=
he 30's=2C 40's and the early 50's.&nbsp=3B Remember=2C that early 50's rac=
e incident at LeMans (1954?)&nbsp=3B with the Mercedes=2C Healey and Jaguar=
=2C&nbsp=3B where about 80 spectators were killed=2C only the Mercedes had =
drum brakes.&nbsp=3B The Healey 100 and the Jaguar both had disc brakes.&nb=
sp=3B <br><br>Richard Mayor <br><br><div><hr id=3D"stopSpelling">Date: Thu=
=2C 29 Jan 2015 09:48:44 +0800<br>From: healey.nut@gmail.com<br>To: steveg@=
abrazosdata.com<br>CC: healeys@autox.team.net<br>Subject: Re: [Healeys] Dru=
m Brakes<br><br>I'm sure LeMans was murder on drums=2C anyone know if they =
would replace the brakes in those days during the course of the race?<span>=
</span><br><br>On Thursday=2C January 29=2C 2015=2C Steve Gerow &lt=3B<a hr=
ef=3D"mailto:steveg@abrazosdata.com";>steveg@abrazosdata.com</a>&gt=3B wrote=
:<br><blockquote class=3D"ecxgmail_quote" style=3D"border-left:1px #ccc sol=
id=3Bpadding-left:1ex=3B"><div lang=3D"EN-US"><div><p class=3D"ecxMsoNormal=
">IMHO the basic issue with advanced drum brakes is complexity (i.e. cost).=
 <u></u><u></u></p><p class=3D"ecxMsoNormal"><u></u>&nbsp=3B<u></u></p><p c=
lass=3D"ecxMsoNormal">Late =9150s early =9160s Alfas had aluminum alfin dru=
ms with diagonal fins with cast-in steel liners and cast aluminum triple-le=
ading shoes. That=92s 6 cylinders on the fronts alone.<u></u><u></u></p><p =
class=3D"ecxMsoNormal"><u></u>&nbsp=3B<u></u></p><p class=3D"ecxMsoNormal">=
The ATE discs Alfa and Porsche adopted provided equivalent or better stoppi=
ng power at less complexity and cost. I heard later Porsche=92s reason for =
going with discs was cost.<u></u><u></u></p><p class=3D"ecxMsoNormal"><u></=
u>&nbsp=3B<u></u></p><p class=3D"ecxMsoNormal">As a side note=2C In the =91=
70s=2C Phil Hill said the drums on Grand Prix cars would go away part way t=
hrough the race=3B in combination with burning up 60 gallons of fuel in a r=
ear tank=2C this made for pretty interesting handling.<u></u><u></u></p><p =
class=3D"ecxMsoNormal"><u></u>&nbsp=3B<u></u></p><p class=3D"ecxMsoNormal">=
--<u></u><u></u></p><p class=3D"ecxMsoNormal"><u></u>&nbsp=3B<u></u></p><p =
class=3D"ecxMsoNormal">Steve Gerow<u></u><u></u></p><p class=3D"ecxMsoNorma=
l">Altadena=2C CA=2C USA<u></u><u></u></p><p class=3D"ecxMsoNormal">BN6<u><=
/u><u></u></p><p class=3D"ecxMsoNormal">Check out my galleries:<u></u><u></=
u></p><p class=3D"ecxMsoNormal"><a href=3D"http://www.pbase.com/stevegerow/=
" target=3D"_blank">http://www.pbase.com/stevegerow/</a><u></u><u></u></p><=
p class=3D"ecxMsoNormal"><u></u>&nbsp=3B<u></u></p></div></div></blockquote=
>=0A=
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ard@hotmail.com</div>                                     </div></body>
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