Thermosyphon warming process

[Andy Bennett]

Further to the earlier post which covered the question of the thermosyphon process, I have found the step by step pictures I took of the warming process. 
The heat patterns are relative rather than specific temperatures but here goes step by step with timings shown. I have to do in 2 posts as i appear to be limited on pictures per post:
Engine cold:

  1.jpg (Size: 128.47 KB / Downloads: 775)

Engine head warming but no sign of any heat going into radiator

  2.jpg (Size: 101.5 KB / Downloads: 774)

First sign of some heat travelling into radiator

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First sign of real heat into top of radiator by the inlet

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more heat into top of radiator but rad still cool

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heat beginning to travel down height of radiator less than 4 minutes after start up

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more to follow

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next picture
top of radiator temp stable but heat travelling down suggesting thermosyphoning running now

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30 seconds later more heat at the base of the radiator

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again a few seconds later with the engine hot but the radiator still not at full working temp and still relatively cool at bottom

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30 seconds after last radiator picture and the heat pattern is relatively stable and remained like this with the radiator core middle at 86 degrees

  10.jpg (Size: 121.86 KB / Downloads: 777)

engine now at even temperature, just over 5 minutes from start up

  11.jpg (Size: 108.06 KB / Downloads: 782)

All of course at a standstill so not real driving, but temperatures appeared to stabelize at the 5 minutes or so point from start up at a relatively low 17 degrees ambient.