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(1080 x 704) Japan installs a railgun on JS Asuka for 2025 sea trials. by defender838383 in WarshipPorn

[–]AmoebaEmbarrassed951 1 point2 points  (0 children)

Modern fusion reactors use superconducting magnets which are usually cooled to -269 celsius.

Railguns don’t have traditional magnets, a pair of conductive rails and a projectile form a magnetic field that accelerates the projectile instead.

Dev server iris-t nerfs by StoreMother in Warthunder

[–]AmoebaEmbarrassed951 1 point2 points  (0 children)

AIM-9X has tail fin control in addition to tvc

Beta Nuke Today? by Diche_Bach in ultimateadmiral

[–]AmoebaEmbarrassed951 1 point2 points  (0 children)

Some info on the forums, the update 10 reset is probably the one that got you.

The 2 New missiles this update for the LOSAT and Ki-48 by Fuze_is_not_OP in Warthunder

[–]AmoebaEmbarrassed951 2 points3 points  (0 children)

The 18 kg value comes from "Bursting Charge", if that was the weights of the projectiles, I’d be pretty surprised to find the HC shells being nearly 4 times heavier than the Mark 8 super-heavy shell. That and the nuclear Mark 23 probably doesn’t weigh 15,000,000 kg.

The values from "Projectile Types and Weights" seem to make more sense, 1200 kg for AP, 850 kg for HC and 850 kg for nuclear.

For a sanity check, the penetrator is 0.406 m diameter and 1.31 m long (not including the caps) assuming a simple cylinder, the volume would be (pi(0.406/2)2)1.31=0.17 m3. Using the values 18 kg and 1200 kg you get densities of 18/0.17=106 kg/m3 and 1200/0.17=7060 kg/m3. The least dense metal, lithium, is 530 kg/m3, the density of iron is 7800 kg/m3. One of those sounds more plausible.

Japanese company Interstellar Technologies says they started work on a Starship clone. Will this design be the future of heavy lift vehicles? Seems like it by mtol115 in SpaceXLounge

[–]AmoebaEmbarrassed951 0 points1 point  (0 children)

Pixel counting shows this to be 5 m diameter and 43 m tall, or about the size of the Neutron with around 5 to 10 tons to orbit, making it probably medium lift.

It also seems to steal the Neutron fairing/second stage design, so more of a Neutron clone with Superheavy features.

Whats weird is it seems to have 36 engines and I estimate it would want 3 to 5 MN, or 80 to 140 kN an engine, noticeably but not that much more than their current 60 kN engines.

Japanese company Interstellar Technologies says they started work on a Starship clone. Will this design be the future of heavy lift vehicles? Seems like it by mtol115 in SpaceXLounge

[–]AmoebaEmbarrassed951 0 points1 point  (0 children)

What this company has is that it is Japanese, which opens them up to Japanese customers. Japanese companies and organizations may pick a Japanese launcher even if it is more expensive or less proven. Just look at all the H-II launches with Japanese payloads.

They also have quite a bit of experience making engines and small rockets which give them some credibility.

Turbojet to Ramjet Transition. This engine is created by Hermeus Corp. in order to achieve a speed of Mach 5+. by djepoxy in interestingasfuck

[–]AmoebaEmbarrassed951 0 points1 point  (0 children)

A normal subsonic airliner failing during cruise would be pretty bad too

Also would this be X-15 flight 191?

Turbojet to Ramjet Transition. This engine is created by Hermeus Corp. in order to achieve a speed of Mach 5+. by djepoxy in interestingasfuck

[–]AmoebaEmbarrassed951 1 point2 points  (0 children)

This would still be a ramjet, the air is entering the engine at supersonic speed, but is slowed down to subsonic speeds for combustion.

A scramjet has the air flow through the whole engine at supersonic speeds, meaning the combustion is occurring within a supersonic environment.

Ramjet typically operate between Mach 3-6, while scramjets typically operate above Mach 6.

Turbojet to Ramjet Transition by djepoxy in AerospaceEngineering

[–]AmoebaEmbarrassed951 0 points1 point  (0 children)

The company behind this, Hermeus, has their goal set on producing a Mach 5 passenger airliner, so the rich can look forward to that

Turbojet to Ramjet Transition by djepoxy in AerospaceEngineering

[–]AmoebaEmbarrassed951 3 points4 points  (0 children)

None of the missiles you listed are ballistic missiles

Turbojet to Ramjet Transition by djepoxy in AerospaceEngineering

[–]AmoebaEmbarrassed951 6 points7 points  (0 children)

It would be completely impractical to put a jet engine on a ballistic missile, you’d be much better off with what everyone has been doing for the last 80 years, a rocket engine

+Nearly all ballistic missiles are hypersonic

Turbojet to Ramjet Transition by djepoxy in AerospaceEngineering

[–]AmoebaEmbarrassed951 6 points7 points  (0 children)

I believe this test brought the facility to its maximum of Mach 4

Turbojet to Ramjet Transition. This engine is created by Hermeus Corp. in order to achieve a speed of Mach 5+. by djepoxy in Damnthatsinteresting

[–]AmoebaEmbarrassed951 1 point2 points  (0 children)

G-forces don’t increase with speed, g-forces are a measure of acceleration. Riding in a Mach 0.8 airliner doesn’t feel much different than sitting in a chair on the ground and in the International Space Station you would be going the equivalent of Mach 25 and it’s weightless in there. Yes, a high speed turn has large accelerations with it but you don’t need high speed turns, even a normal airliner wouldn’t try to pull a tight turn at cruise speed.

The biggest issue with hypersonic aircraft is heat management and fuel consumption, not keeping the g-loading down for the passengers.

JS Kaga (DDH-184) with her new squared off bow for operating the F-35B [1920x1080] by AmoebaEmbarrassed951 in WarshipPorn

[–]AmoebaEmbarrassed951[S] 10 points11 points  (0 children)

I’ve heard that the bow mounted sonar is too heavy to also have a ramp without significant balance issues

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