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11
Space Projects / Re: Space-X DRAGON (manned/unmanned) capsule.
« Last post by blackstar on Yesterday at 08:47:53 pm »
http://www.theverge.com/2017/2/17/14652026/spacex-red-dragon-spacecraft-mars-mission-2020


EDIT: On another note: http://www.theverge.com/2017/2/17/14634940/nasa-spacex-dragon-capsule-falcon-9-launch-raven

Thanks for both those links. A few random comments:

-Red Dragon was tweeted by Elon Musk in April 2016. The 2018 launch window was always ambitious. Building new, even relatively simple spacecraft takes 3-5 years. Unless they already had a substantial head start on it, the launch date was not just optimistic, but unrealistic.

-I was in a briefing last fall by a SpaceX Red Dragon guy and he was always very careful when discussing the schedule. That briefing convinced me that they were going to miss 2018. My guess is that they knew months before that they were not going to meet the launch window. The fact that they were not showing any hardware photos was also telling.

-I know NASA Mars engineers who fully expected Red Dragon to fail on its first mission but were still looking forward to the data. I think that the chances of success have now improved because they have more time to catch problems. But the probability of success is still not very high.

-All those comments aside, I still think it is great that they're going to try this. NASA does not have the money to do technology development like this. SpaceX is going to do it on their own dime. That's great. We need more of that.
12
Postwar Aircraft Projects / Re: Boeing F/A-18E/F Super Hornet upgrades
« Last post by lantinian on Yesterday at 07:41:55 pm »
Quote
Guys XT is the NEW Advanced Super Hornet/Block III, different than the 2013 Advanced Super Hornet that focused on stealth https://twitter.com/jacqklimas/status/832655110098477063
13
Hi! La-176.
http://translate.google.fr/translate?hl=fr&sl=ru&tl=en&u=http%3A%2F%2Fwww.airwar.ru%2Fenc%2Ffighter%2Fla176.html&sandbox=1

"Flying "176-th" held at the end of 1948 at the airport Saki with the presence of a strong side wind from the sea.  Test pilots and Igor Fyodorov O.Sokolovsky engrossed in risky missions.  They were delivered almost mystical task - to overcome the speed of sound.  No one at the time to do so has not been able to.  The flights were made from 10,000 m with a reduction and subsequent conversion into the horizon.  For the first time the speed of sound in the La-176 reached the December 26, 1948-th.  Until January 1949, such flights were repeated six times.  Officially, the Commission registered the result of 1105 km / h at an altitude of 7000 m in the official test report stated:. "This speed of the aircraft in the Soviet Union received the first aircraft flight test materials." 176 "represent a exceptional value for our aircraft."

 While the speed of 1105 km / h exceeded the targets set best jets foreign aircraft registered FAI.  After replacing the RD-45 engine with a more powerful VK-1 V.Klimova design, the aircraft has reached a ceiling of 15 km.  Thus, the creation of La-176 was the most important stage in the development of Russian fighter aircraft.  La-176 opened its Mission to Lavochkin prospect of further work on the follow-fighters - La-190 and La-200.  Still, the main merit of the La-176 -preodolenie sound barrier.  It was interesting to learn about this exciting moment from the test pilot I.Fedorova.  Ivan Evgrafovich recalls, "it has become clear that the guarantees of survival after him, no Nobody knew almost what it is and whether the aircraft element design head stand, but it tried not to think before flying to overcome the sound barrier... "
14
Aerospace / Re: F-15 Silent Eagle unveiled
« Last post by Triton on Yesterday at 04:52:52 pm »
Boeing promotional video for Advanced F-15, formerly known as 2040 C.
Now that we know there is a relationship between Boeing CEO Dennis Muilenburg and President of the United States Donald Trump, it will be interesting to see if the United States Air Force will order the F-15 Silent Eagle or upgrade the F-15C fleet to F-15 Advanced.

Idle speculation aside, why is this video in the F-15 SE topic? We have an F-15 Modernization topic: http://www.secretprojects.co.uk/forum/index.php/topic,16451.0.html

My Search fu was off, sorry.
15
Aerospace / F-23 weapons bay
« Last post by Ogami musashi on Yesterday at 04:47:13 pm »
After some thoughts, i can't get my mind on how the weapon release in the F-23A would work. Let me explain:

- On the YF-23 PAV-1, there was a complicated plater+launcher system. The Utility manual says that the palet was outward angled by 17 degrees. In Paul Metz book, the YF-23 drawing indeed depicts two amraams in the weapon bay being angled at approx 17 outward.

-The problem is that, IMHO, this system can't work on the F-23A. The two missiles on the YF-23 were located at the center of the bay, while on the F-23A you had 4 of them with two outward and on top of two other(see aldo spadoni illustration above). The weapon bays on the F-23A were shallower and more importantly there was wing bulkhead that basically prevented the lower missiles to be rotated.
The two files attached show the 4 missiles arrangement on the F-23A and the YF-23A arrangement as put into an F-23A weapon bay.


-Since you can't rotate the lower missiles, then, only four hypothesis:

1/ The weapon palet tilts down to fire the upper missiles. This seems impossible for two reasons: the bulkhead will prevent the lower missile to rotate unless lowered outside of the weapon bay (see point 3) and even though, the upper missiles can't be fired without being extended (their wings would collide with lower missiles fins).
2/ You can't select the munition and lower missiles are first launched. This would seem plausible because the plane has one weapon bay for amraams and one for sidewinder. Except that in technical drawings, in the specifications table, you have an alternative weapon load offered. And this is still has only amraam and aim-9 as possibility. At the time of the proposal, the aim-120c program wasn't officially launched and as confirmed by Aldo spadoni, aim-120c fitting in the F-23A was only remotely researched so the proposal didn't feature those. I think one probable loadout was a 4 aim-9 and two aim-120 missiles. In that case, not being able to select the munition is clearly impossible.
3/ The whole loadout is exposed to the air. This would be pretty strange for a plane that put so much attention to stealth that the whole pylons+missiles would be in the stream!
4/ The rest of all solutions!

Anyone has some idea, info?
16
Hi! La-168. Ancestor of La-174, La-176 and La-15.
https://en.wikipedia.org/wiki/Lavochkin_La-168

Design and development
Aircraft 168 was preceded by the Lavochkin La-160 jet fighter which was the first to utilize swept wing surfaces first researched by the Germans, but it moved the engine from the nose to behind the pilot. It resembled the Mikoyan MiG-15 and used the same cannon-armament and the Rolls-Royce Nene II engine. Unlike the MiG-15, the La-168 had shoulder mounted wings and a t-tail layout. Due to Lavochkin's decision to wait with La-168 development for the Nene II engine, the MiG-15, first flown with the less powerful Nene I, was available four months earlier, giving it a crucial advantage.
Aircraft 168's first flight was on April 22, 1948, with I. E. Fedorov at the controls. Trials continued until February 19, 1949, when testing of the cannons at high altitude caused the canopy to collapse, resulting in a nearly fatal crash. In the end, the Lavochkin fighter lost out to the competing MiG-15. Another 168 derivative was the La-176, the first Soviet plane to achieve supersonic flight (in a shallow dive) on December 26, 1948.
A scaled down version of this aircraft powered by a Rolls-Royce Derwent, was produced as Aircraft 174, prototype of the production La-15, which although well liked and having superior performance, was more expensive and harder to mass-produce than the MiG-15.[1]
Variants
Aircraft 176 - One Aircraft 168 produced with 45 swept wings and tailplane. Believed to be first Soviet aircraft to exceed Mach 1.0 albeit in a dive. Crashed whilst supersonic when canopy collapsed.
Aircraft 174 - A 0.9 scale version of aircraft 168 which was productionised as the La-15.

Russian site.
http://translate.google.fr/translate?hl=fr&sl=ru&tl=en&u=http%3A%2F%2Fwww.airwar.ru%2Fenc%2Ffighter%2Fla168.html&sandbox=1

http://rufor.org/showthread.php?t=25337
http://propjet.ucoz.ru/forum/11-40-3
17
Early Aircraft Projects / Re: Tupolev's dive-bomber ANT-57
« Last post by blackkite on Yesterday at 04:33:38 pm »
Thanks a lot iverson-san. Amazing pictures. :o
18
Early Aircraft Projects / Re: Tupolev's dive-bomber ANT-57
« Last post by iverson on Yesterday at 04:14:19 pm »
I just found two pictures of the M-120 in my collection (ultimate source again unknown).
19
Early Aircraft Projects / Re: Tupolev's dive-bomber ANT-57
« Last post by iverson on Yesterday at 04:11:37 pm »
Hi! M-105P engine. I can't find M-105TK engine picture or specification.

https://en.wikipedia.org/wiki/Klimov_M-105

OKB TOPOLEV(ISBN 1-85780-214-4) page82.
"Tupolev and his colleagues also worked on a twin-engined version with 24-cylinder Dobrynin M-120TK engines.(precursor of Tu-2)"
I can't find Dobrynin M-120TK engine picture and specification, too.

The M-105TK was the Klimov M-105 with two TK-3 turbo-superchargers and a modified reduction gear. It was in prodcution from 1939-40. It was used in the Petlyakov VI-100 high-altitude fighter.

The M-120 was another Klimov engine that combined three M-103 blocks (18 cylinders rather than 24) spaced 120-degrees apart on a shared crankcase. The M-120TK was the same engine with turbo-superchargers. It was rated at 1400/1600 hp and weighed 950 kg. It never entered service because of reliability problems and, no doubt, the success of higher-powered versions of the lighter 12-cylinder engines.

Source: Russian Piston Aero Engines by Vladimir Kotelnikov (Crowood, 2005).

The attached photos of the M-105TK in the VI-100 are from somewhere on the internet.
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