[Spits] Electronic Tach

[John Macartney]

This condition is well-known on the eastern side of the pond and in
Standard-Triumph parlance of the day comes into the category of "an i'erent
(inherent) fault" I've encountered this condition on many later Spitfires,
including one that was under my care for some 18 months. A firm knock on the
instrument glass is all that's required to make it work. One surely doesn't
expect the rev counter to work well for ever, does one?
Jonmac
________________________________
 From: Grant Buss <buss3 at rogers.com>
To:
Roger Elliott <elliottr at rmi.net>; Spitfire list <spitfires at autox.team.net>
Sent: Monday, 7 January 2013, 4:04
Subject: Re: [Spits] Electronic Tach
>Hello
>I have a '78 Spitfire and the tack has been the same way for as long
as I have had it (close to 20 years).
>Now idea why.
>Grant Buss
>
>-----Original Message----- From: Roger Elliott
>Sent: Sunday, January 06,
2013 5:14 PM
>To: Spitfire list
>Subject: [Spits] Electronic Tach
>
>Hi All,
>
>I have an 80 Spitfire with an electronic tach.  Ever since I have owned
>it,
it takes some time  (several seconds) after I  start the engine for
>it to
start indicating the rpms.
>
>I have always wondered about that but never
asked.  Is that normal?   If
>so, why would it take time to start indicating
rpms?
>
>Thanks,
>Roger
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