Ferrari Mailing List: Re: Vintage LM Race vintage tachymeters

[f2kracer (f2kracer]

One more Lotus story.....I completely forgot to tell the one about when a 
friend dropped his Lola Super Vee on top of me at Waterford Hills. He touched 
his right front on my left rear coming into the esses in the back and it 
launched him up in the air. I felt the thump, looked up and saw the underside 
of his nose and thought "Oh crap, he's going to land right in my lap"; I slid 
down in the seat as far as I could, tucked my head down, locked the brakes and 
waited, sliding off into the runoff area.  When I stopped sliding, he still 
hadn't shown up. I cautiously looked up to see most of the underside of his 
chassis hanging over my head, perched on top of my roll bar,in a moderately 
suggestive pose of the Super Vee "mounted" on the back of the Lotus. Several 
people told me later that they wanted one of the pups. Didn't touch my helmet 
at all, I had a fairly tall roll bar. I did have a hell of a time getting out 
of the car, though, several corner workers had to help me. Amazingly 
 minor damage to my car, thank goodness, and we were able to make repairs 
overnight and run the following day. 
 
Tom Pattison
f2kracer [at] aol.com
f2kracer [at] hotmail.com
 
 
-----Original Message-----
From: lashdeep [at] yahoo.com
To: f2kracer [at] aol.com; red5hilser [at] aol.com
Cc: ferrari [at] ferrarilist.com; Staxwax [at] aol.com; len_ashburn [at] 
hotmail.com; alexzanardifan [at] hotmail.com; MaxEd49 [at] aol.com
Sent: Fri, 5 Jan 2007 2:10 PM
Subject: Re: [Ferrari] Vintage LM Race vintage tachymeters


Tom, I hope you don't think you can just drop a reference to a Chevron B-17 and 
then not elaborate more about the car.
 
What do you think this is? A loosely car based forum for people to talk about 
lettuce, watches, and cats??
 
:)
 
Please...tell us more about the Chevron and the Lotus...any pics??
 
Thanks,
LS


----- Original Message ----
From: "f2kracer [at] aol.com" <f2kracer [at] aol.com>
To: lashdeep [at] yahoo.com; red5hilser [at] aol.com
Cc: ferrari [at] ferrarilist.com; Staxwax [at] aol.com; len_ashburn [at] 
hotmail.com; alexzanardifan [at] hotmail.com; MaxEd49 [at] aol.com
Sent: Friday, January 5, 2007 8:05:16 AM
Subject: Re: [Ferrari] Vintage LM Race vintage tachymeters


I don't recall an adjustment mechanism for the delay interval on any that I 
had; the Smiths tach on my Lotus 20 (1962 vintage) definitely had that type of 
tach, and I think my Chevron B-17 ('70ish) did also.   
 
Tom Pattison
f2kracer [at] aol.com
f2kracer [at] hotmail.com
 
 
-----Original Message-----
From: lashdeep [at] yahoo.com
To: f2kracer [at] aol.com; red5hilser [at] aol.com
Cc: ferrari [at] ferrarilist.com; Staxwax [at] aol.com; len_ashburn [at] 
hotmail.com; alexzanardifan [at] hotmail.com; MaxEd49 [at] aol.com
Sent: Thu, 4 Jan 2007 5:36 PM
Subject: Re: [Ferrari] Vintage LM Race vintage tachymeters


That's interesting...
 
Is the timing interval adjustable on most of the vintage chrono tachs? It 
doesn't sound so accurate real time, but if the interval could be changed it 
could become relevant.
 
Upon studying *some* of the older British cars, I'm constantly amazed at how 
much engineering those Englishman mastered. They set the standard in many areas.
 
The Salisbury rear and torsion bar suspension are pretty cool. The XKE is one 
of the most advanced cars of the era with regards to road manners.
 
Now, if they had only discovered dialectic grease...
 
Thanks for the reply,
LS


----- Original Message ----
From: "f2kracer [at] aol.com" <f2kracer [at] aol.com>
To: red5hilser [at] aol.com; lashdeep [at] yahoo.com
Cc: ferrari [at] ferrarilist.com; Staxwax [at] aol.com; len_ashburn [at] 
hotmail.com; alexzanardifan [at] hotmail.com; MaxEd49 [at] aol.com
Sent: Thursday, January 4, 2007 4:59:06 PM
Subject: Re: [Ferrari] Vintage LM Race vintage tachymeters


I believe what you're referring to were known as chronometric tachs, and that 
intermittent action was done to make them more readable at speed (while racing) 
 
Tom Pattison
f2kracer [at] aol.com
f2kracer [at] hotmail.com
 
 
-----Original Message-----
From: red5hilser [at] aol.com
To: lashdeep [at] yahoo.com
Cc: ferrari [at] ferrarilist.com; F2KRACER [at] aol.com; Staxwax [at] aol.com; 
len_ashburn [at] hotmail.com; alexzanardifan [at] hotmail.com; MaxEd49 [at] 
aol.com
Sent: Thu, 4 Jan 2007 4:04 PM
Subject: Re: [Ferrari] Vintage LM Race vintage tachymeters


Beats me. Back in the 1950's/60's, when I used to haunt the pits at such places 
as Riverside, Pomona, Paramount Ranch, and Laguna Seca, it was common in pure 
race cars to see the tachs move in increments of a few hundred revs. It was so 
common that I think it was SOP. Both Smiths in the British cars and Jaeger in 
the Italian Ferrari's Maserati's, and OSCA's were the same. My Jaguar XK120 and 
Austin-Healey 100 had mechanical Smiths which were smooth, but they were road 
machines. I remember watching Carroll Shelby warm up John Edgar's 4.5 Maserati 
in the pits at Pomona, and the tach jumped back and forth a few hundred revs at 
a time as he 'bliped' the throttle. Had I known this would come up 50 years 
later on the List ... I would have asked 'Ol Shel' or John, who always sat in a 
director's chair on top of his 18 wheel hauler to watch the races. In those 
days the vast majority of cars were towed to the races using either a pick-up 
or panel truck. Needless to say, I was impressed
 !
 
Yer pal, Ferrari Bubba
 
 
-----Original Message-----
From: lashdeep [at] yahoo.com
To: red5hilser [at] aol.com
Cc: ferrari [at] ferrarilist.com
Sent: Thu, 4 Jan 2007 12:03 PM
Subject: Re: [Ferrari] Vintage LM Race vintage tachymeters


On older cars, I've only seen tachs that read a signal off of a rotating/timed 
engine component. Typically, this would be a distributor or a camshaft. If the 
tach jumps, it would have to mean a voltage problem with either the "generator" 
on the engine or in the actual gauge itself. 

I did ask a friend who restores old Jags to add thoughts. Apparently, the old 
XK140s used a cable that ran off of the camshaft. This cable led to the gauge 
which contained a plastic hub that positioned the needle. He's seen these 
cables 
get contaminated with oil leaking from the cam seal. This oil creates a problem 
in the hub mechanism at the gauge and can cause those erratic tach movements.

So, in short...who knows!?!

It would have to depend on the car and what type of tach it uses...

What car were we talking about here?

LS 

----- Original Message ----
From: Doug and Terri Anderson <dnt [at] dock.net>
To: LS <lashdeep [at] yahoo.com>
Cc: The FerrariList <ferrari [at] ferrarilist.com>
Sent: Thursday, January 4, 2007 9:10:39 AM
Subject: Re: [Ferrari] Vintage LM Race vintage tachymeters


Done on purpose and hard to duplicate by instrument restorers.  Perhaps the 
old smooth tachs had a tendency to fly way past the actual rpm and those 
that stuttered were closer to actual engine rpm.  Just a guess.  Built in 
damper.
DOUG

----- Original Message ----- 
From: "Paul Bennett" <pbennett [at] macnet.com>
To: "DOUG" <dnt [at] dock.net>
Cc: "The FerrariList" <ferrari [at] ferrarilist.com>
Sent: Wednesday, January 03, 2007 10:03 PM
Subject: [Ferrari] Vintage LM Race vintage tachymeters


>I noticed in many cockpit shots of the older cars, the tachymeters
> didn't increase smoothly as now, but stepped up and down in
> large rpm increments.  Like perhaps 3.0k > 3.5k > 4.0k >4.5k
>
> Any idea of why the jerkiness?
>
>
>
> Great show...18 different race start/finish and view of the
> 'control room' which I'd not seen or heard of before.
>
>
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