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Printing Venturi - temperature resistance


MikeQ
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Hello

 

sure I’ve asked this on some forum before but can’t find it now and things have most likely moved on anyway.

 

I’d like  to print Venturi with different sized holes for optimising the run on my Control line model engines.  This kind of thing  Control Line Venturi

 

I’m guessing PLA won’t cut the mustard re the kind of temperatures that the crankcase gets to around the throttle/Venturi area.  Might not be as hot as the cylinder head but still pretty hot.  Motor in question is an OS 46 LA.

 

cheers

 

mike

 

 

 

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Hi

 

thanks for the feedback but I need the ability to create Venturi with precisely controlled diameters and shapes.


My ancient lathe and poor machining skills could just about do it but time consuming compared to whacking out some 3D models and printing.

 

cheers

 

mike

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What temp can PLA withstand? How hot does an engine block get? Usually it's "just too hot to touch" I suspect the PLA might not last for long. Maybe worth a trial run on the ground with a test piece. Heat soak after the run finishes (ie no handy cooling breeze or flow through the venturi) might be the biggest problem? Probably be fine while running.

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Apart from any temperature considerations, Is PLA glow fuel proof?

Also bear in mind that normally the inerior of a venturi has a "polished" finish. You would not get such a finsh with 3D printing so it would not have the same airflow characteristics. The dimensions of a 3D printed venturi would not be appropriate for an aluminiuml one.

 

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