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91
Space Projects / Re: Rods from God / "Project Thor"
« Last post by Charlesferdinand on December 09, 2018, 11:56:33 pm »
Also, when a long rod strikes a solid object, its kinetic energy is concentrated on a small area. Think of an APFSDS tank gun round.

Agreed, but that would depend on the accuracy you can expect. So would these projectiles have some kind of steering mechanism, and be something like a guided bomb?
92
Early Aircraft Projects / Re: Axis 1940 airliner dreams/projects
« Last post by Jemiba on December 09, 2018, 09:33:36 pm »
... was intended as a post war civil light transport. ....

That's hardly what we would call an "airliner", isn't it ?
93
Military / Re: Gerald R. Ford Class CVN
« Last post by sferrin on December 09, 2018, 04:14:36 pm »
I can't imaging them NOT doing it (since it will save a ton of money).  This is sounds more like lighting a fire for them to get the kinks worked out.
94
Early Aircraft Projects / Re: Zmaj R-1
« Last post by blockhaj on December 09, 2018, 02:29:35 pm »
Sry to necro the thread but id like to know more about the R-1. For ex what types of bombs did it use and what bombloads did it have?
95
Propulsion / Liquid Piston Engine
« Last post by fredymac on December 09, 2018, 02:00:05 pm »
Liquid Piston engine.  The name seems to be a marketing hook but it may relate to the way fuel/air is injected into the rotary piston as a delivery path to the combustion "nooks" built into the main housing.

They seem to be progressing slowly but steadily and are targeting military/UAV applications as commercial/automotive markets are resistant to new engine architectures and require serious financial backing.







Phase II DARPA contract for a diesel 40HP UAV engine starting at 4:30 mark.
96
Military / Re: Gerald R. Ford Class CVN
« Last post by Moose on December 09, 2018, 12:32:06 pm »
SASC Chair James Inhofe (R-OK) says he's "not yet opposed" to the two-carrier block buy.

Quote
However, he has spoken to Defense Secretary James Mattis about his concerns. The 2019 defense authorization bill puts the decision on a two-carrier purchase in Mattis' hands.

Supporters say the bulk buy will create economies of scale and save at least $2.5 billion. It would also shore up smaller defense contractors that supply HII's Newport News Shipbuilding division with parts and services.

Quote
Inhofe, a Republican from Oklahoma, is succeeding the late John McCain as chairman of the Senate Armed Services Committee. His assessment on a proposed two-carrier buy came after a visit to the HII shipyard at Newport News on Dec. 3.

His visit and subsequent comments were first reported by Bloomberg.

The new weapons elevators are designed to move bombs faster from lower decks up to the flight deck. That will increase the number of sorties aircraft can fly and contribute to the ship's overall punch in combat.

Inhofe said he would continue to track progress on the elevators. "Until these elevators work, we only have 10 operational aircraft carriers despite a requirement for 12," he said in the email.
97
Aerospace / Re: A-X all over again - USAF pushes for A-10 replacement
« Last post by Foo Fighter on December 09, 2018, 11:52:56 am »
I suppose a decision will be taken one day, preferably before the replacement is due for, well, replacement.
98
Aerospace / Re: A-X all over again - USAF pushes for A-10 replacement
« Last post by jsport on December 09, 2018, 09:23:51 am »
Who is an authority on this forum?  Let us see your credentials. One can not be a Neutral arbitrator and be biased.

The DoD is so 'Corporate captured' that the ground forces have been clearly abandoned, as F-35 and its numbers alone will never provide sufficient support. The majors have no intention to even discuss alternatives. Alternatives and discussion a potential real CAS solution seems to be repressed at all avenues.
This discussion has gotten completely off track. The point was why are there no Analysis of Alternatives AoA for an A-10 replacement?

There was.

https://www.rand.org/pubs/research_reports/RR1724z1.html
Thank you for finding.

Pretty superficial (Rand is AF = F-35 will do).

'The need to strike a variety of targets creates a need to carry a diverse set of weapons. The need for a wide variety of munitions implies carriage of a large number of weapons, regardless of the number of targets. In highly intense cases, we found that a loadout sufficient to kill two armored targets per sortie was a minimum capability, with a preferred capacity closer to five kills per sortie (is this a joke). Laser-guided rockets with armor-piercing warheads could be a highly effective addition to the force."
99
Space Projects / Re: KH-11 KENNEN
« Last post by sferrin on December 09, 2018, 07:56:32 am »
Not often you see a hold at so close a point to the full ignition on a launch, donít know what that means for the turnaround on the Delta IVH to try again for launch.

https://spaceflightnow.com/2018/12/09/delta-4-heavy-countdown-aborted-moments-before-launch/

IIRC one of the Falcon launches was aborted moments after ignition and they just shut the engines down.
100
Postwar Aircraft Projects / Re: Boeing-Vertol Tilt-Rotor Projects
« Last post by hesham on December 09, 2018, 07:45:33 am »
here is a report from DTIC for Boeing-Vertol tilt-rotor projects,they called it D213,and I don't
know if it was meaning BV.213 or not,also the Helijet design.


http://www.dtic.mil/dtic/tr/fulltext/u2/729427.pdf

I was right,it was BV.213;

https://apps.dtic.mil/dtic/tr/fulltext/u2/736825.pdf
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