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Whistling air flow holes in RDA's
- Thread starter Seb-Zero
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State O' Flux
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Turn the cap slightly, in relation to the coil... or, set the coil a bit further inboard / alter the angle from the present position... or, worst case, if all else fails, get a slightly larger, sharp drill bit (preferably an actual countersinking or chamfering bit, but most folks don't have them) and chamfer or "flair" both sides of the holes.
State O' Flux
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Me as well... semi-retired now. The slight chamfer seems to change the air flow enough to kill the whistle... not on all, but some. I believe cap wall thickness and hole diameter as well, when taken as comparative ratios... all play a part.
One of these days, I'll make a fixture to test something as small as a RDA cap on the flowbench, if for no other reason than to prove or disprove theories.
One of these days, I'll make a fixture to test something as small as a RDA cap on the flowbench, if for no other reason than to prove or disprove theories.
Cool, One thing I did not bring up that you would understand is how the hell would you chamfer the id of a -22mm dripper cap? I could probably make a specialized tool, but would that really make a difference, or does it need to just be a sharp edge? Unless of course you were referring to chamfering the od of dual air holes?
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I cheat.
Foredom makes (made? Mine is pretty old) a neat, small, 90 degree detail porting head, and with a small cratex cone, you can almost hit the ID dead on... almost. With a 26650 RDA, there's room to spare.
I'm sure you could rig up some little one-off deal, that at least breaks the sharp edge... I don't know what you have on hand... so, I guess, reach into your miscellaneous stuff drawer... and "MacGyver" it.
Foredom makes (made? Mine is pretty old) a neat, small, 90 degree detail porting head, and with a small cratex cone, you can almost hit the ID dead on... almost. With a 26650 RDA, there's room to spare.
I'm sure you could rig up some little one-off deal, that at least breaks the sharp edge... I don't know what you have on hand... so, I guess, reach into your miscellaneous stuff drawer... and "MacGyver" it.
Well, I'm a model maker for a motor company, 21 yrs.I have a very large shelf and drawers full of "MacGyver" fixtures for things that should not be possible to make on manual machines. I have a ton of ideas for RDA's and improving airflow for sub-ohm. You sound like a similar type of guy.