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44 minutes ago, Moa said:

Far from being an engineer

Au conraire mon ami, you are definitely an engineer of the plastic.  

 

32 minutes ago, Dave Swindell said:

They serve two purposes

Thanks for that, Dave, clear as a bell now.

 

Dennis

 

 

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27 minutes ago, johndon said:

Nice work on the bells

Thanks, John.

 

Dennis

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38 minutes ago, Moa said:

Hi Dave

Does that mean that they are not actually rings, but a sort of coiled duct?

No, they're rings. If you think of the rocket bell being the wing surface radiator of a Schneider racer rolled spanwise into a cone, the rings are the coolant headers supplying the coolant to the tiny channels in the radiator. 

The whole of the rocket bell is double walled and cooled by fuel between the walls. it's known as regenerative cooling (link warning, it contains references to German rockets that go bang).

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12 minutes ago, Dave Swindell said:

No, they're rings. If you think of the rocket bell being the wing surface radiator of a Schneider racer rolled spanwise into a cone, the rings are the coolant headers supplying the coolant to the tiny channels in the radiator. 

The whole of the rocket bell is double walled and cooled by fuel between the walls. it's known as regenerative cooling (link warning, it contains references to German rockets that go bang).

Thanks, Dave, great piece of knowledge shared, appreciated.

Cheers

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