daily menu » rate the banner | guess the city | one on oneforums map | privacy policy | DMCA | news magazine | posting guidelines

Go Back   SkyscraperCity > Infrastructure and Mobility Forums > Airports and Aviation

Airports and Aviation » Airports | Photos and Videos



Global Announcement

As a general reminder, please respect others and respect copyrights. Go here to familiarize yourself with our posting policy.


Reply

 
Thread Tools
Old December 21st, 2016, 02:07 PM   #141
Kosolap
Registered User
 
Kosolap's Avatar
 
Join Date: Nov 2016
Posts: 100
Likes (Received): 384

one more
__________________

Qtya, patel2897, Iggis, Zaz965, BadHatter and 2 others liked this post
Kosolap no está en línea   Reply With Quote

Sponsored Links
Old December 21st, 2016, 02:59 PM   #142
Kosolap
Registered User
 
Kosolap's Avatar
 
Join Date: Nov 2016
Posts: 100
Likes (Received): 384

New video
__________________

Zaz965, BadHatter liked this post

Last edited by Kosolap; May 13th, 2017 at 03:28 AM.
Kosolap no está en línea   Reply With Quote
Old December 21st, 2016, 11:04 PM   #143
patel2897
INDIA
 
patel2897's Avatar
 
Join Date: Jul 2013
Location: Kandivali,mumbai/Philadelphia, USA
Posts: 2,805
Likes (Received): 3605

No winglet ? why ?
__________________
Peace Begins With Smile - Mother Teresa. He Who Has The Knowledge has the Responsibility To Impart It To The Students.-Rabindranath Tagore. Live As If You Were To Die Tomorrow. Learn As If You Were To Live Forever. - Mahatma Gandhi. My YouTube Channel Subscribe : https://www.youtube.com/channel/UCHt...sCBbDKXmkN4YFw

Zaz965 liked this post
patel2897 no está en línea   Reply With Quote
Old December 22nd, 2016, 03:04 AM   #144
Kosolap
Registered User
 
Kosolap's Avatar
 
Join Date: Nov 2016
Posts: 100
Likes (Received): 384

Quote:
Originally Posted by patel2897 View Post
No winglet ? why ?
Not because of not knowing how to do such devices.
A common misunderstanding is that a winglet or raked tip increases a wing’s efficiency by affecting the wingtip vortices. This is a misconception.
Wing tip devices are part of the overall wing design and they improve the wing’s drag characteristics by forming a wider and (ideally) more elliptical lift distribution. Irkut claims they achieved their target lift distribution with base wing within the gate width restrictions of 36m, so there is no need of a special wingtip.
MC-21 has a slim wing with a good aspect ratio of 11.5 (actually superb)
This aspect ratio is possible as this wing is made of Carbon Fiber Reinforced Plastics (CFRP). This allows the designer more freedom because the weight stays lower despite a long span and it allows the tailoring of the wings form and aero-elasticity to a higher degree than a classical aluminum wing would allow.
__________________
Kosolap no está en línea   Reply With Quote
Old December 22nd, 2016, 06:07 AM   #145
Zaz965
Je suis kanonirsss
 
Zaz965's Avatar
 
Join Date: Jan 2015
Location: CCCP
Posts: 3,107
Likes (Received): 27991

will ms-21 continue to have this name or will it change to yak-242?
__________________

djole13 liked this post
Zaz965 está en línea ahora   Reply With Quote
Old December 22nd, 2016, 06:41 AM   #146
medviation
Professional Ass Kicker
 
medviation's Avatar
 
Join Date: May 2008
Location: Metro Manila
Posts: 702
Likes (Received): 279

Wow. That 11.5 aspect ratio is very high for a jetliner! With that kind of aspect ratio, I think the difference a winglet might make is negligible. Also, winglets add weight so.

But IIRC the -400 will have bigger wings like a 757 if it gets built?
__________________
If you play by their rules, they're always going to beat you.

I HATE NAIA

orel2016 liked this post
medviation no está en línea   Reply With Quote
Old December 22nd, 2016, 08:03 PM   #147
Spam King
Make America Great Again!
 
Spam King's Avatar
 
Join Date: May 2008
Location: Polanco, Distrito Federal
Posts: 879
Likes (Received): 569

Quote:
Originally Posted by masala View Post
I thought they are going to use Russian made PD-14 engine, although for western customers they may use US ones.
Is development even finished on that engine?
__________________
In the heart of a busy metropolis skyscrapers are a vivid reminder of the constant yearning of the human spirit to rise to God


MAKE AMERICA GREAT AGAIN!
Spam King no está en línea   Reply With Quote
Old December 22nd, 2016, 10:48 PM   #148
masala
Registered User
 
Join Date: Nov 2016
Posts: 54
Likes (Received): 135

Quote:
Originally Posted by Spam King View Post
Is development even finished on that engine?
According to wikipedia, serial production starts in 2016.
__________________

Zaz965, xalexey liked this post
masala no está en línea   Reply With Quote
Old December 25th, 2016, 03:48 PM   #149
Babysitter
Registered User
 
Join Date: Jul 2011
Location: Moscow
Posts: 128
Likes (Received): 478

Quote:
Originally Posted by Spam King View Post
Is development even finished on that engine?
Not yet, it's on flying lab tests. And after that comes sertification. No less than a couple of years before we see it powering real commercial flight.
__________________
Babysitter no está en línea   Reply With Quote
Old December 27th, 2016, 10:57 PM   #150
xalexey
Registered User
 
Join Date: Feb 2014
Posts: 1,418
Likes (Received): 2825

Serial production of PD-14 engine .. 2018.
__________________

orel2016 liked this post
xalexey no está en línea   Reply With Quote
Old January 11th, 2017, 02:08 PM   #151
Kosolap
Registered User
 
Kosolap's Avatar
 
Join Date: Nov 2016
Posts: 100
Likes (Received): 384

MC-21 tested for reverse thrust behavior

This thermal image shows the flows of air from the MC-21's engines in thrust reversal as the aircraft is braking on the runway (Photo by TsAGI)

Russia’s Central Aerohydrodynamic Institute (TsAGI), located in Zhukovsky outside Moscow, has completed thrust reversal tests on a mock-up of the Irkut MC-21 narrowbody aircraft powered by Pratt & Whitney PW1400G engines. The institute conducted the tests at the request of Irkut Corporation, which leads the development of the new airliner.

The tests were intended to appraise the safe operating conditions, and establish the engine stall margin, with the thrust reversers engaged. The results of this study will be used in preparations for the flight tests, which are set to begin in the spring of 2017. The MC-21 will be initially flight-tested with PW1400Gs. The Russian-made option — Aviadvigatel PD-14 is expected to be installed at a later stage.

TsAGI was testing the thrust reversal mode in a full-scale wind tunnel. The tests simulated the aircraft landing and braking on the runway with the thrust reversers engaged. The experiments provided information about the thrust-reversing effect on the aircraft’s controls, its stability and controllability, including in case of system and engine failures in the braking phase. The researchers identified potential ways to prevent re-ingestion of fuel vapors into the air intakes, and proposed measures to ensure reliable engine operation in reverse thrust.

The tests were based on TsAGI’s in-house approach, which relies on the use of weight and aerodynamic measurements and also on advanced optical and thermal imaging methods for air flow visualization, says Alexander Chevagin, who heads the institute’s propulsion aerodynamics research department. This approach allows for a detailed analysis of how the air flows around the airframe in different engine operation modes, and depending on the runway speed after landing.

Computer simulation of airflows from the MC-21's engines in thrust reversal (image by TsAGI)
__________________

patel2897, Juni, Jobber, xalexey, Zaz965 and 1 others liked this post
Kosolap no está en línea   Reply With Quote
Old April 29th, 2017, 02:54 PM   #152
ultEmate
ульт
 
Join Date: May 2010
Posts: 2,153
Likes (Received): 26061

МС 21-300 S/N 21001 preparing for the first flight.





PD-14 tests.

__________________
ultEmate no está en línea   Reply With Quote
Old April 30th, 2017, 01:57 AM   #153
sponge_bob
Registered User
 
Join Date: Aug 2013
Posts: 3,954
Likes (Received): 2205

Its not like P&W are in 'serial' production themselves either.
sponge_bob no está en línea   Reply With Quote
Old April 30th, 2017, 08:47 AM   #154
patel2897
INDIA
 
patel2897's Avatar
 
Join Date: Jul 2013
Location: Kandivali,mumbai/Philadelphia, USA
Posts: 2,805
Likes (Received): 3605

I made this video enjoy ! https://www.youtube.com/watch?v=
__________________
Peace Begins With Smile - Mother Teresa. He Who Has The Knowledge has the Responsibility To Impart It To The Students.-Rabindranath Tagore. Live As If You Were To Die Tomorrow. Learn As If You Were To Live Forever. - Mahatma Gandhi. My YouTube Channel Subscribe : https://www.youtube.com/channel/UCHt...sCBbDKXmkN4YFw

Denim Tornado, Zaz965 liked this post
patel2897 no está en línea   Reply With Quote
Old May 2nd, 2017, 04:28 PM   #155
richard fischer
Registered User
 
Join Date: Apr 2005
Posts: 4,800
Likes (Received): 1508

I read a wing broke during wing tests before it should have, can anyone confirm?
__________________

orel2016 liked this post
richard fischer no está en línea   Reply With Quote
Old May 2nd, 2017, 09:48 PM   #156
Kosolap
Registered User
 
Kosolap's Avatar
 
Join Date: Nov 2016
Posts: 100
Likes (Received): 384

Quote:
Originally Posted by richard fischer View Post
I read a wing broke during wing tests before it should have, can anyone confirm?
Well, it came from Irkut's press-release, where they were saying about "important milestone" and "successful completion of static tests"

So, they claim to be happy with their alleviated wing (tests were carried out on an alleviated wing), which almost reached 100% of the ultimate load. Only 25kg reinforcement was needed. The reinforcement was performed without unmating the wing from the fuselage.

meanwhile...
Chinese airframer Comac, which produced an overly reinforced wing on its C919 airliner and will now have to make it lighter, which looks much harder task
__________________

orel2016 liked this post

Last edited by Kosolap; May 2nd, 2017 at 11:17 PM.
Kosolap no está en línea   Reply With Quote
Old May 3rd, 2017, 03:31 AM   #157
ultEmate
ульт
 
Join Date: May 2010
Posts: 2,153
Likes (Received): 26061

Quote:
Originally Posted by richard fischer View Post
I read a wing broke during wing tests before it should have, can anyone confirm?
During the tests where the goal was to apply the pressure to the wing until it breaks. Breaking news, everyone.
__________________

Kosolap, tius86, eclipsevl, Iggis, BadHatter and 2 others liked this post
ultEmate no está en línea   Reply With Quote
Old May 10th, 2017, 06:04 PM   #158
ultEmate
ульт
 
Join Date: May 2010
Posts: 2,153
Likes (Received): 26061

__________________

Danfer21, xalexey, Kosolap, Zaz965, patel2897 and 7 others liked this post
ultEmate no está en línea   Reply With Quote
Old May 12th, 2017, 07:36 AM   #159
Wezza
©
 
Wezza's Avatar
 
Join Date: Jan 2004
Location: Townsville
Posts: 8,888
Likes (Received): 996

When can we expect to see it in the air? Seems to be dragging on a bit.
Wezza está en línea ahora   Reply With Quote
Old May 12th, 2017, 02:20 PM   #160
ultEmate
ульт
 
Join Date: May 2010
Posts: 2,153
Likes (Received): 26061

They didn't give exact dates, but it should be up in the air by the end of this month.
__________________

Wezza liked this post
ultEmate no está en línea   Reply With Quote


Reply

Tags
airplane

Thread Tools

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Related topics on SkyscraperCity


All times are GMT +2. The time now is 07:09 AM.


Powered by vBulletin® Version 3.8.11 Beta 4
Copyright ©2000 - 2018, vBulletin Solutions Inc.
Feedback Buttons provided by Advanced Post Thanks / Like (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.

SkyscraperCity ☆ In Urbanity We trust ☆ about us | privacy policy | DMCA policy

tech management by Sysprosium