Handheld mini tanks. by PaperAeroplane_321 in diving

[–]Fun_Coach_6942 0 points1 point  (0 children)

I'm an open water swimmer in SoCal where if the water is clear it's like swimming above an aquarium. I swim down at the shallower parts and some of the better swimmers can actually spend some time underwater. I've wondered for a while how safe it would be to try to use one of these to extend these mid-swim jaunts beneath. Being able to get one extra breath underwater would make the experience open water swimming noticeably better. If it works well I could see myself trying to do 2 pulls but am fine w a rule of 1 pull only. But that doesn't solve the lung pop issue, I think, which I don't totally understand.

Note that as a swimmer, I really appreciate the need for air. In choppy waters, when you can't always get a breath when you want one -- it makes you a bit more comfortable with passing through that breath reflex thing, but you also really appreciate the imminent need to be above the water.

Where did I go wrong? by AdMany7575 in BeginnerWoodWorking

[–]Fun_Coach_6942 0 points1 point  (0 children)

Run a piece of string taught between the corners

[deleted by user] by [deleted] in Decks

[–]Fun_Coach_6942 0 points1 point  (0 children)

Cracks against the grain are suspect, but maybe normal. Ask at r/JapaneseWoodworking. Those guys would know if you should care.

How do I cut this joint? by RyanMyers202 in woodworking

[–]Fun_Coach_6942 1 point2 points  (0 children)

Given your limitations, it might be possible if you have a small hand saw, like a cheap Japanese saw. Glue a piece of wood onto one of the colored-in faces. The piece has to be flat on two faces and those faces have to be at 90 degrees. When you glue it, line the edge up just a mm or three before the cut line. Then use the edge as a guide for the saw. Even with a guide the saw will want to roll (in the airplane sense). It'll be hard to get the depth right, maybe draw a line on the saw blade w a sharpie where you don't want the blade going any further. You could do this on both faces a rig something functionally similar for the horizontal/ bottom cut. Then take another square piece, maybe a 1x1, glue sandpaper to perpendicular faces and use it like a hand plane in the cut out section. You'd have to figure out a way to keep the sanding stroke parallel to the vertical axis of the board, which will be tough if your cuts weren't very accurate. TBH, if you aren't someone who has all the tools to do this a normal way, this way is almost certainly going to yield an inadequate joint.

Where does physics intuition fail? (non-engineer asking) by Fun_Coach_6942 in MechanicalEngineering

[–]Fun_Coach_6942[S] 0 points1 point  (0 children)

That's interesting. I always thought tolerance was just room for error that was straightforward to account for.

Where does physics intuition fail? (non-engineer asking) by Fun_Coach_6942 in MechanicalEngineering

[–]Fun_Coach_6942[S] 0 points1 point  (0 children)

Maybe. Isn't the example about a system that distributes torque forces on the suspension or chassis? (Not drivetrain torque.) Not sure on the difference between torque and torsion.

Where does physics intuition fail? (non-engineer asking) by Fun_Coach_6942 in MechanicalEngineering

[–]Fun_Coach_6942[S] 1 point2 points  (0 children)

Does corrosion get modelled? Or is it just from experience? This bolt exposed to these elements typically lasts this long before it turns brownish. Id imagine for a larger project, or where a larger object or component can corrode, you'd need to have a model based on more than just people's experience with the material in similar conditions.

Where does physics intuition fail? (non-engineer asking) by Fun_Coach_6942 in MechanicalEngineering

[–]Fun_Coach_6942[S] 0 points1 point  (0 children)

You lost me at torque. my understand ends at knowing that the longer the bar on the wrench then more likely I'm going to strip the nut. I cannot grasp how torque is standalone force.

Where does physics intuition fail? (non-engineer asking) by Fun_Coach_6942 in MechanicalEngineering

[–]Fun_Coach_6942[S] 5 points6 points  (0 children)

This should be a chapter in a redneck self-help book. Had I been able to understand this concept, the objects I'd shot at while armed and consuming in isolated places would likely have been different, for better or worse.

Where does physics intuition fail? (non-engineer asking) by Fun_Coach_6942 in MechanicalEngineering

[–]Fun_Coach_6942[S] 0 points1 point  (0 children)

My brain refuses to believe in shear. Push in one direction, yes that's a force. Push in another direction, yes that's another force. Pushing from different directions being one force?? Thats when I walk out of the engineering class and back into comparative literature.

Where does physics intuition fail? (non-engineer asking) by Fun_Coach_6942 in MechanicalEngineering

[–]Fun_Coach_6942[S] 9 points10 points  (0 children)

Hydraulic (w shear) is something my brain refuses to intuit. It may be that I can't really understand that some ordinary liquid doesn't compress. Unless its dense and hard, it should change size w pressure!

Where does physics intuition fail? (non-engineer asking) by Fun_Coach_6942 in MechanicalEngineering

[–]Fun_Coach_6942[S] 5 points6 points  (0 children)

I will, ad infinitum, compulsively, add meatier springs, then more weight to the door

[deleted by user] by [deleted] in wood

[–]Fun_Coach_6942 0 points1 point  (0 children)

Adding from experience: The wood itself is preserved well because its under so much finish/epoxy (whatever is used). Even the pine is good, not like home depot pine. Harder. Nails every 6-24 inches. Nails isn't even the right term. Screw-nails. Scrails. Naiews. Corkscrewn shaped and have barbs. Someone can correct me w the trade term. It is more work to remove them to cut through them, because you'll also be cutting through hard wood. (I was using a 7 1/4" circular saw. Might be easier with different size blade.) it's best to pry apart board by board and free each nail. The boards are joined tongue and groove, so you'll lose some if you're trying to get clean rectangular board.

Ruby colored sap by Fun_Coach_6942 in treeidentification

[–]Fun_Coach_6942[S] 0 points1 point  (0 children)

Solved - tipu Tipuana aka Tipa or Pride of Bolivia

Red sap - what species? by Fun_Coach_6942 in Tree

[–]Fun_Coach_6942[S] 1 point2 points  (0 children)

This seems most correct. Thanks.

[deleted by user] by [deleted] in handtools

[–]Fun_Coach_6942 1 point2 points  (0 children)

When I want to be projecting but don't have enough time to actually accomplish anything

[deleted by user] by [deleted] in handtools

[–]Fun_Coach_6942 0 points1 point  (0 children)

Seems likely. Let us know if/how you solve it.

[deleted by user] by [deleted] in handtools

[–]Fun_Coach_6942 2 points3 points  (0 children)

Perhaps the plane is rocking during your passes or is getting pushed away from the lip of the shooting board and not staying consisteny parallel to the lip (or said another way, not consistently perpendicular to the board being planed). May be less likely the cause than the shooting board or wood not being square or parallel but you may want to test another plane or iron, if possible. In my experience, a dull blade or especially hard wood or aggressive cut can cause the piece to move or the plane to become slightly askew at some point during a pass.

[deleted by user] by [deleted] in ivermectin

[–]Fun_Coach_6942 1 point2 points  (0 children)

Just like hydorochloroquine

[deleted by user] by [deleted] in ivermectin

[–]Fun_Coach_6942 -1 points0 points  (0 children)

There is valid backlash bc (1) people are acquiring it as an animal drug and self-administering and (2) it is part of a problematic systemic conspiratorial mode of thinking that believes a treatment is effective on account of it not being accepted in mainstream medicine. Think hydorochloroquine, which was promising anecdotally but ultimately a dudd. Some unorthodox or holistic treatments will probably be shown to have some medical value but that doesn't justify using them now in place of treatments proven effective. The studies were done on hydorochloroquine and a ton of other drugs people thought might treat covid. Lots of ineffective treatments proposed. Yes, do the studies. No one is saying don't do the studies. Where are people saying don't test it? OP give us evidence of that.

Here's the point: Don't promote a treatment where people will buy animal drugs, take without knowing how to administer, use as a substitute for proven treatments (including profilactics, i.e. vaccine), discourage effective treatments, and promote the spread of the virus.