On Thu, 11 May 2017 19:43:42 +0100, Chris J Dixon
wrote:

snip

Then there was the heater designed so that, if it was going to
stick, it would do so fully on.

The heater on my Messerschmitt KR200 is a jacket wrapped round the
exhaust manifold-downpipe. Heat up time was nearly instant, as would
be death if there was an exhaust leak. ;-(

Cheers, T i m