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Aerospace / Re: France and Germany to develop new european fighter jet
« Last post by kaiserd on Today at 01:21:36 am »
If I may I think some of the contributors are missing the wider point.
What is being proposed is not a direct F-35 competitor, but a long term project to create the technology for and to build a Typhoon/ Rafale, and potentially F-35, replacement; what comes next.

As such issues raised around costs and efficient management are valid (promises to be very expensive over many years), as are concerns that it would have to compete with (parallel?) UCAV projects and that it may be difficult to sustain the political will to see the project through.

However issues raised around technical ability of Airbus and Dassualt to build it and its associated avionics, technology etc. appear misplaced.
And if this project was to be put on a firmer footing then involvement by the likes of Saab and BAe (post potential Brexit-related acrimony) in this project or whatever this project ends up evolving into is also quite likely.
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Aerospace / Re: Japanese next generation fighter study
« Last post by totoro on Today at 01:10:25 am »
Engine pr0n!

Looks reasonably conventional though - I'm more impressed with the integral composite fuselage frame/skin.

Which image showed that?

And would that mean a truly one piece of machined airframe with skin or would it simply mean that instead of fasteners some other method was used to (semi)permanently "glue" skin to the frames?
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Army Projects / Re: M-1 Replacement
« Last post by kaiserd on Today at 12:52:16 am »
If the UK is lucky we can get in early on a joint development deal.  Minus the Europeans we might actually get something done this time.

Re: your second line;
1. Leaving aside EU membership/ Brexit you know the UK is part of the European continent, right? Even after Brexit the UK will literally still be in Europe and residents of the UK will still be Europeans.
2. Don’t understand the relevance of your comments to the topic; the UK has never developed a tank in partnership with any other nation (European or otherwise) as far as I am aware (maybe the parallel evolution of Shermans in WW2 the closest?). Hence they’ve never delayed or impacted the development of a specific British Tank.
In terms of partnership with European countries in other defense projects they have been largely successful, certainly more successful than the many failed UK-only projects that immediately preceded them.
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Propulsion / Re: What-if Engines
« Last post by Nick Sumner on Today at 12:41:58 am »
Some of these were actually planned in real life, The RR Vulture had smaller cylinders than the Merlin but the same spacing between cylinders suggesting that it would be possible to use Merlin blocks. The RR H24 using Merlin cylinders was definitely planned, there is a model at the Derby museum. I'm pretty sure Napier planed a 32 cylinder Sabre as well.
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There was a project for a hovercar that spent a long time taking money from investors and going nowhere, apart from the instigator going to jail for fraud, this strikes me as going the same way.  There are always going to be new emperors new clothes frauds going on, we just have to avoid becoming victims.

The level of detail required has not been reached for this to be even half way realistic.  If you want a new siut and like to walk around naked by all means, invest.  However, a session with a shrink might just see you lose less money and feel better.
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The Bar / Re: Navy grounds two aviators behind penis skydrawing
« Last post by Foo Fighter on Yesterday at 11:29:02 pm »
Not exactly the work of intelligent adults was it.  Deal with the disciplinary side and get a life.  How much did it cost to train these guys and THAT is the best they can do?
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Early Aircraft Projects / Re: Arsenal VG-30 variants
« Last post by blackkite on Yesterday at 11:22:17 pm »
https://www.aviarmor.net/aww2/projects/fra/arsenal_vg60.htm
 "Arsenal VG-60 Fighter
At the beginning of the year 1940 l'Arsenal experts developed several promising projects light fighters, which served as a base for the production model VG-33. In addition to pure aerodynamic forms these aircraft differed sufficiently powerful armament and propulsion system of high power. The French did not have enough engineers to literally years to start their projects, one of which was the VG-60.

It was assumed that the new fighter will make the best design solutions from earlier models and reach higher levels. Under the scheme it was an all-metal low-wing monoplane layout and development. Key racks and wheel chassis completely folded in the wing and Center-wing and tail roller was poluubiraemym and in flight shut down by a semicircular flap. In contrast to other variants of a cockpit pidota (drop-shaped) was executed. The plane was scheduled to install row engine type liquid-cooled Hispano-Siuza capacity of not less than 1200 HP it would leave 60 VG-designed maximum speed on the order of 700 km/h.

An unusually potent was picked up composition. According to the draft in wing consoles been eight 12.7 mm machine guns, and the breakdown of engine cylinders set 20-mm gun motor. Thus, the mass of the second salvo of VG-60 left far behind Bf 109 any modification and surpassed American P-47.

Development of the model was started too late and by June 1940, was ready only a preliminary sketch. In the years of occupation, work on the project has been completely stopped, but after the war to VG-60 decided to come back again. Since the full-scale production of its own engines only time and nemeckjo products lacked abundantly, there were plans to install at Jumo 213E engine fighter. However, even preliminary calculations showed that the power plant just doesn't pull planned 700 km/h, and other performance indicators also inevitably declined (as demonstrated by the Czechoslovak experience with Bf 109 g all these pasenija were confirmed in full as). After some discussion, in the summer of 1945 year it was decided to abandon further work on VG-60 and to give priority to the development of rocket technology.

Sources:
 http://www.unicraft.biz/on/vg60/vg60.htm
Drawings isterbitelja Arsenal VG-60

Project tactical-technical data fighter Arsenal VG-60:
 Length: 10.00 m
 Wingspan-12.00 m
 Wing area-22.17 sq. m.
 Wing loading-?
 Height-?
 Empty weight-?
 Take-off weight-3488 kg
 Maximum speed is around 700 km/h
 The speed of the Earth is?
 Rate of climb-?
 Engine-one row Hispano-Suiza
 Crew-1 person
 Armament: one 20-mm-cannon motor and eight 12.7 mm machine guns in the wing"
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Aerospace / Re: Japanese next generation fighter study
« Last post by Sundog on Yesterday at 10:08:03 pm »
Any reason the main wing is not more of a diamond planform? If they are improving on a basic "F-22 type" design why the swept trailing edge?

Because the requirements for the F-3 aren't the exact same as the F-22. The JASDF has found that for their mission, loiter time is more important than top end speed. As a result, they went with a wing designed with a higher aspect ratio at their design point than the F-22s.
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Early Aircraft Projects / Arsenal VG-30 variants
« Last post by blackkite on Yesterday at 09:55:14 pm »
Hi! Arsenal VG-30 variants.
https://en.wikipedia.org/wiki/Arsenal_VG-33

"The Arsenal VG-33 was one of a series of fast French light fighter aircraft under development at the start of World War II, but which matured too late to see extensive service in the French Air Force during the Battle of France.

VG-30 – The original powerplant was the Potez 12Dc flat-12 air-cooled inline engine, but the prototype was fitted with a Hispano-Suiza 12Xcrs, and flew in this form in October 1938.
VG-31 – Hispano-Suiza 12Y-31 powered prototype.
VG-32 – Allison V-1710C-15 powered prototype.
VG-33 – First production model with Hispano-Suiza 12Y-31 engine (160 near completion at Fall of France. Unknown number completed.)
VG-34 – 697 kW (935 hp) Hispano-Suiza 12Y-45 engine. 360 mph (600 km/h). Prototype only.
VG-35 – VG-33 variant with newer engine. One built.
VG-36 – 746 kW (1,000 hp) Hispano-Suiza 12Y-51 engine. Prototype only.
VG-37 – Extended-range version of the VG-36. Not built.
VG-38 – projected for Hispano-Suiza 12Y-77 engine. Not built.
VG-39 – 954 kW (1,280 hp) Hispano-Suiza 12Z engine. 393 mph (655 km/h). 6x 7.5 mm MAC 1934 machine guns. Prototype only.
VG-39bis – proposed production version powered by a Hispano-Suiza 12Z-17.
VG-40 – projected variant powered by a Rolls Royce Merlin III.
VG-50 – projected variant powered by an Allison V-1710-39. (N.B. The designation VG 50 was also used for a projected four-engined trans-atlantic transport)
VG-60 – The ultimate projected variant powered by a 1,000 hp Hispano-Suiza 12Y-51 supercharged by a two-stage Sidlowsky-Planiol turbo-charger."

http://rejpalek.blog.cz/0908/arsenal-vg-32

http://www.airwar.ru/enc/fww2/vg30.html
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