Xlucine

Ukraine is exporting again!

These blades are pure ceramics - fibres of silicon carbide, and AFAICT they are surrounded by a SiC matrix (or pure Si, but probably not). There's no metal in them

Hotish things on crisps are good, worchestershire sauce flavoured crisps are another example. There is a blue dot north of kiev, but most of the blue in russia is to the east of that

While china has done the opposite and still enjoys large scale reforestation - this is encouraging

Does carbon attenuate radar, or will the radar go straight through and find one of the metal blades behind the carbon blades?

It looks like the rounds are stored in cassettes like T-72, but the cassette is ejected after use unlike T-72 (the cassette ejector is part number 9 on the first drawing). Google translate calls it "remove the tray mechanism". Bojan claims that the 2A82 is a necked down 2A83, so I'd be very surprised if it were very different on T-14 Welcome! M1 has a BV, according to the_chieftain - it may not have been fitted on early models, but it's definitely there now. The gunner looks to have a better chance of escaping than on most western tanks - normally he has to wait till the commander has legged it, while on T-14 he can still get out via the drivers hatch if the commander is incapacitated for whatever reason

Janes supports 16, see post #8

I don't want to know how you apply that stuff to the seals

Further research has revealed that that journo really had no idea what they were talking about. They claimed it will be implemented on the LEAP engines in such a way as to suggest that LEAP will have Ceramic Matrix Composite (CMC) blades, when LEAP will only have a CMC high pressure turbine shroud per GE. Also according to that document there were CMC parts in the ADVENT variable bypass ratio engine (presumably only static parts like the high pressure shroud), and we should see CMC blades on the production equivalent of ADVENT. As a further point of interest, they claim that the fins lack of cooling channels means you can make them more aerodynamically efficient - so the lack of bleed air does have advantages for efficiency. I also found this article, which makes for interesting reading. GE has invested over $100mil into making a new facility to produce CMC components, and they're far from the only ones interested in the technology. ETA: this gets better - apparently the F136 was going to have CMC parts, until it got cancelled

According to the patent it's amphibious. huh. Also most of the illustrations are blacked out, which is a shame - I wanted to see the pilot-powered dynamo in the escape glider Carburettor's don't produce lift Any low pressure generated above the lifting body will also pull down the top of the casing, so it's just a really inefficient air intake

Read dis book. The author is one half of the team that discovered the mechanism that makes ceramic turbine blades possible, so he really knows his stuff. Also don't expect to understand his explanation of beam bending, for some reason he refuses to acknowledge moments

Someone name a tank after him

70-80cm pen from a rifle grenade is quite impressive, AFAIK javelin only does 60cm

Something about having an aerofoil inside a tube doesn't seem quite right to me

So 1500hp for armata, and 800hp for kurganets, and a standard of 8 dismounts per IFV? It looks like someone sat on a BTR-60 IMO

It's a plot to annoy a small welsh village. The village of caernarvon did actually complain about it, and I suspect it's related to why you only see that place called caernarfon now

An F-16 and a SU-30 will happily overmatch a business aircraft, it could just be that the F-16 is cheaper to fly. Or was closer

Apparently there's rumours of stripping the world cup from russia/quatar, which would be neat to see

Ooh, a hexagonal radar array?

The pen thing is nice, but they still have huge issues with the basic armour models - have you got them to accept that aberdeen report an the M103 turret sides yet?

I've just remembered why this is a great idea, and I want to kick myself for forgetting it - they haven't made the ceramics ductile, they've made them resist crack growth which means you can put them in tension without major issues. The stress field around a crack tip is rather complex, with the stress concentrated in a very small volume at the tip and peak values around 2 orders of magnitude higher than the average stress for a typical minute crack (i.e., ~1 atom tip radius). The pattern looks something like this: (from here) The exact stress field is complex and can only be gathered from direct measurement or FEA simulations, and it has some rather useful properties as well as the awkward peak values. Generally measurements will only give the magnitude of stress at a point, however with FEA you can output a graph of stress in a single direction only. Stress perpendicular to the crack is the bulk of the stress, so the values are not much different to that of the magnitude graph, but the stress parallel to the crack (and perpendicular to the applied stress) is very different. For reasons I don't understand (must be something to do with poisson's ratio) there is an area of high stress parallel to the crack a small distance in front of the crack tip (the distance is about the same as the tip radius), with peak values of around 20% of the maximum stress perpendicular to the crack. This is very handy! In fibre composite materials it's generally rather challenging to bond the fibres to the matrix, so the tensile strength parallel to the fibres will be much higher - this is why they tend to have fibres woven is several directions, or random spreading of fibres (like in some examples of fibreglass). This lower strength is very useful when a crack is introduced into the composite - if the bonding between the fibre and matrix is about 20% as strong as the fibres are, then the area of high stress parallel to the crack will create a void in the material as the crack approaches a fibre. When the crack meets this void it is effectively blunted - the single atom radius crack tip is now effectively infinitely large, so the crack is stopped at the fibre. This is known as the cook-gordon mechanism, and here's a diagram: From here The new crack perpendicular to the old crack isn't an issue as long as the loading doesn't change, as cracks are not affected much by stress parallel to them. So in these turbine blades any small cracks that form will grow until they encounter a interface, and then get blunted. You'll probably need the fibres carefully aligned with the stress at that point, but with FEA it should be possible to create a map of the stress field throughout the blade. I also found a paper on crack mitigation in ceramics using this mechanism when googling for the pictures - I wonder if this would also work for multi-hit capability in ceramic armours?

It's an easy problem to solve - the bolded bit follows the rest very easily, so it shouldn't be too hard to find something to sentence them to death for.

Rig a drone for crop dusting with herbicides, then draw phallic objects on their lawns

It's probably easier to support upside down - the uppermost tunnels/chambers ought to be larger and better connected

FUCK YO THUTTY CAL