hello Son,I Do Believe I'm Your Long Lost Son. Hello Father
Hey GM!@tags420 thanks for the post and the links to do some further research on the topic. I agree, the 5.886" was the go to for a lightly active (small fan on 5v) with the passive safety net. Seems like these days everyone is obsessed with "being passive" for one reason or another, while expecting to get Supra's efficiency numbers at high Tc. And I agree, nothing to worry about with this tried and true set up.
@Nu-Be I have seen high-end PC guys go to great lengths to get a matting surface that was flat within 0.001" I can machine a surface close to one or two thousands, but man, its a lot of time and work. You bring up a great point, long extruded heatsinks aren't perfectly flat unless surface machined, its just not in the nature of the extrusion process with aluminum.
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pin sinks perform best when angled or tilted. but what if the pins were hollow? would this be enough of a convection current or draft to improve its performance, i guess we shall find out.
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Now THAT'S nifty asf!@Wisher2 heres a mould that I have been working on a while, and it still needs a lot of work, as I have a lot to learn about composites and gel-coats. but this would potentially be usable many times for various composites.
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i used to burn rice myself, lol. I tried to be tasteful with my ride, but the mentality was if a little fiber is good, then a shit load of it everywhere is better right, lol.@Growmau5
I wasnt sure if it was pure carbon fiber or and overlayment of a figerglass piece.....
in the car audio industry.....and I will speak for myself....the look of carbon fiber is hot trash.....unless mid 2000's import tuner is the look you are after (not you specifically)
so we would spary with some trusty Montana paint and gel coat the piece....fiberglass might be more cost effective at the price of a lower strength....although you dont really need strength when it comes to an enclosure for a light fixture.....good on you for being super inovative......
Great idea! As a former NASA employee, I'm sure you know of Colonel Stapp? He did some high G work (on) himself, you two should collaborate.Hey GM!
1st: Don't fight it, you are insane (or at least highly abnormal) - in a really good way. I should know, it feels like you are a brother from a different mother except I'm older and dumber. And I worked at NASA.
2nd: I bet the Carbon fiber fixture is easy to keep clean, it keeps cabling out of the way and safe, and is off the charts on the cool factor. So Mr. Dawg, there ARE other advantages. Expensive, but I mention how fricken cool it is??? And it matches the interior of the McLaren Grow Van i dreamed about last night. Pretty sure it would be the quickest grow room on the planet. Planning on running experiments on the results of rapid acceleration (and deceleration) on the growth of landrace Indicas. I'll get back to ya on results.
3rd: The hollow HS pins are an intriguing idea, doubles the surface area of the pins. Do you think you might need some vent holes in the bottom of those hollow tubes in order to allow airflow up and out....otherwise there will be considerable drag between air upflow and inflow/downflow which would diminish their effectiveness?? You've probably already thought of this....
Hope this brought ya a smile, bro. Really appreciate ya.
ok, now you woke up my brain cells! and recommendation on filling fluid? mineral oil?
PC water cooling fluid?ok, now you woke up my brain cells! and recommendation on filling fluid? mineral oil?
It was most certainly meant as a compliment.@The Green Griffin I take that as a compliment! insanity can lead to some pretty cool innovative stuff sometimes. I started getting into composites at the request of my Dad for some custom car parts he wanted to make. Its not really practical for grow lights, but practical has never really been high on my list.
On the hollow pin design, I have never seen it commercially available, but that doesn't mean it doesn't exist. I think you are spot on, holes in the base of the sink everywhere but under the COB would potentially have the same effect as turning a pin heatsink at an angle(like that article everyone keeps linking).
i may be reaching a little here, but the heat created by the field of photons coming from the LES could create enough of a micro climate to cause a convection current to push air thru the holes in the base, up thru the pins and out the top. this could be the most efficient passive design available. maybe ill knock the dust off this project and get the prototype out for testing.
now. how do I attach the pins to the base, thats where im stuck. I can make a jig out of wood or metal so the pins end up straight and parallel. but do I use:
-2 part thermal epoxy
-braise them with a torch and AL filler
-TIG weld them (time, energy, low skill level at TIG) possible warping of base
so IDK.
If the hollow pins had openings at the base, they could cause a convection current of air to flow through them, improving heat transfer.
I would if he wasn't dead. A legend and a true American hero. That dude took over 46 Gs, the most ever taken by a human (voluntarily at least!). His rocket sled makes the McLaren look like a barge. I worked at Goddard in DC on unmanned missions so I never met him but I'm in awe.Great idea! As a former NASA employee, I'm sure you know of Colonel Stapp? He did some high G work (on) himself, you two should collaborate.
I'm gratified to see my nerd jokes don't fall on deaf ears. The man is a legend, no doubt.I would if he wasn't dead. A legend and a true American hero. That dude took over 46 Gs, the most ever taken by a human (voluntarily at least!). His rocket sled makes the McLaren look like a barge. I worked at Goddard in DC on unmanned missions so I never met him but I'm in awe.
I'd think the small diameter would impede passive air flow a lot. that's why I suggested heat pipes. the evapo\condens cycle would probably be more effective at moving the heat to the other end of the pin.If the hollow pins had openings at the base, they could cause a convection current of air to flow through them, improving heat transfer.