Re: spit - hot air intake

[Charlie Brown <cb1500@erols.com>]

Michael Galloway wrote:
> 
> good day ...
> 
> perhaps a silly question, but does the spitfire hot air intake
> from the exhaust manifold just collect hot air from around the
> manifold, or does it actually collect exhaust gas?
> 
> -- michael
>    '78 spitfire


Just the former. That circuit is an air intake pre-heater. It aids in 
quicker warm ups. There should be a foam covered flap in the fresh air 
intake, attached to a bi-metalic spring that, as the engine warms, 
gradually closes off the hot air and allows more outside air in. 

Charlie B.