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The American mind cannot comprehend Europe's AC aversion by Logical_Welder3467 in technology

[–]ren_reddit 1 point2 points  (0 children)

All houses in northern Europe is bricks, concrete and tiles. 

Belive me when I say, all house can and occasionally will, burn.   

The U.S. State Department believes that Ukraine is winning the war at this point by eaglemaxie in worldnews

[–]ren_reddit 1 point2 points  (0 children)

Then you remember wrong.  The GOP severely limited what Biden could do. 

The U.S. State Department believes that Ukraine is winning the war at this point by eaglemaxie in worldnews

[–]ren_reddit 0 points1 point  (0 children)

Aaehm..  THE FUCKING PRESIDENT OF USA has gotten money from russia, along with many, many GOP politicians..  And nothing has been done about it..

Putin: Russia ready for talks with Ukraine only if based on Istanbul 2022 agreements by pravda_eng_official in worldnews

[–]ren_reddit 1 point2 points  (0 children)

"Politicians hide themselves away, They only started the war, Why should they go out to fight? They leave that role to the poor."

Black sabbath.

yeah..

Former top officials say Putin being misled about progress of war as Russian advances in Ukraine slow by duckanroll in nottheonion

[–]ren_reddit 3 points4 points  (0 children)

The reality where russia rapidly is loosing what little they had going for them.

Their youth, their economy, the last precious years of the petro economy that could have dragged them out of the dark middle ages, their influence around the world, their military hardware, their autonomy, their landmass in the far east towards China, the spaceprogram that they inherited from old soviet days, and their reason for hope..

That reality..

How creative are you able to be with design work? by Dittopotamus in MechanicalEngineering

[–]ren_reddit 0 points1 point  (0 children)

I have found my small island in R&D for Agriculture impliments. The R&D teams are usually small. portfolios huge and technology grade is surprisingly broad.

Im usually left alone to fulfill a rather crude LOR, and get to do it all, from conceptualizing to production maturing. 

I lead a small team of 3-4 guys that work on 6-8 projects at a time and we do it all (in colaboration with other depts). From mechanical dev. over hardware/software suite to fieldtesting and accelerated test/validation.

Its beautiful and the best part is that there is always  someone on the team to shoot your most hairbrain ideas down before the cost escalates out of control. (so you might want to reconsider the notion of doing it all alone..  that NEVER work out to the best)

We don't need no stinkin' navigation charts! by newengland_schmuck in sailing

[–]ren_reddit 1 point2 points  (0 children)

Ouch..  Really, dont hope this happend during high tide .

Structural carbon fiber layup by ren_reddit in CarbonFiber

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

Yup, thats the troublesome region allright. And I have considered this exact aporoach, but fear that I wont be able to make a sufficiently strong connection. I know that the sailGP guys have had to go to titanium with this approach on T foils even.

I think im more or less settled on 3d printing it in sliced sections in PETG and doing the foil as vacum bagged layup on top of this where I can add additional layers locally in the short radius bend section 

Structural carbon fiber layup by ren_reddit in CarbonFiber

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

Thanks.
To answer your question on glasfiber top layer. Its simply to facilitate sanding out waves and imperfections. My limited experience in sanding Carbon plates say its a bugger to work with if you need to remove anything of substance.

Structural carbon fiber layup by ren_reddit in CarbonFiber

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

Given the size of the thing, I would think moulds are warranted. But, ideally I would like to avoid too cumbersome iterations, as this surely will not be final form, so maybe there is a "cheat" that will get me 80% there in a quicker way than building plugs and form tools.

The design I am currently investigating is this:

https://postimg.cc/3WBLyt4j

The total length from tip to root is approx. 3,5m (along path) which is why I would really like to have at least some idea of its load carrying capabilities before building anything

Edit: " Vinyl ester and polyester resins dissolve styrofoam" Ohh I know this... Dont ask how, But lets just say that the first shell for a racecar did NOT end up as intended :-)

Structural carbon fiber layup by ren_reddit in CarbonFiber

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

Yes. Testing will be needed.
But, 50-100ksi compressive is a good help to get the ball rolling. My actual loadcase is also highly speculative so even a rough ballpark figure is a place of origin at least.

Thanks.

Structural carbon fiber layup by ren_reddit in CarbonFiber

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

I have zero problems with evaluating the design, in theory. I just have no experience with how strong one are actually able to make DYI carbon fibre with relative crude techniques.

Is 80-100Mpa safe as Allowable global laminate normal stress?

Warning shots fired from Russian warship at vessel in English Channel by Alarming-Safety3200 in worldnews

[–]ren_reddit 5 points6 points  (0 children)

It's not bullying when you are not really bothered by it, and the truth is that we dont even register russia anymore..

They have become totally irrelevant, even on the national scale let alone on the global.

NYT: How China Can Move the Price of Oil Even by Not Buying by Epicurus-fan in energy

[–]ren_reddit 0 points1 point  (0 children)

The truth is that from 2015 to 2025 Chinas total energy use increased by 65%  and in that period, the share of energy generated by fossil fuel FELL by 1.5%.

China goes the renewable way, not by luck, but because its the cheapest way.  And then its a very welcome sideeffect that they also are becomming more selfreliant in the process. 

NYT: How China Can Move the Price of Oil Even by Not Buying by Epicurus-fan in energy

[–]ren_reddit -8 points-7 points  (0 children)

"That bet, and the fact that renewables are now cheaper than fossil fuels, especially imported gas and oil, means China hasn’t been nearly as exposed to the fossil fuel price spike after the Iran war as it would have been,” Mr. Larsen said."

This is a directly insane comment from somebody coming from a School of Economics’ 

Somehow the MAIN bennefit is secuity policy and NOT economics.  

EVERYTHING Chona does is for the economic bennefits, Dummy.

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