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outlaw162
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 Posted: Jul 27, 2009 - 07:57 PM
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Forum Veteran
Joined: Feb 28, 2008 - 02:33 AM
Posts: 968
Status: Offline
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The main thing to remember when doing a powerback is to bring the aircraft to a stop using a firm application of the wheel brakes.
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Sponsor
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 Posted: May 24, 2013 - 8:35 PM
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F-16.net Sponsor
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Roscoe
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Posted: Jul 28, 2009 - 03:47 AM
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Elite 1K
Joined: Jun 29, 2004 - 09:14 PM
Posts: 1279
Location: Las Vegas
Status: Offline
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Interesting tidbit about the Viggen TRs. the engine was US-made, but the TR was a domestic add-on.
(I was privileged to fly in a Viggen during our Test Pilot School field trip to the Swedish Flight Test Center...one of the most memorable rides of my life!) |
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Roscoe
<b>"It's time to get medieval, I'm goin' in for guns"</b> - <i>Dos Gringos</i>
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That_Engine_Guy
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Posted: Jul 28, 2009 - 04:30 AM
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Elite 2K
Joined: Dec 14, 2005 - 05:03 AM
Posts: 2198
Location: Under the engine somewhere.
Status: Offline
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Yes, to second (or third?) thrust reverser systems are heavy, much heavier than a simple drag-chute system.
On the 'power-back' or 'backing-up' issue with TRs, it does lead to FOD, and hot-gas ingestion, esp in something like a fighter with little, to no by-pass air.
Here are some TR diagrams.
The last diagram is the 'tested' TV/TR nozzle developed for the F100/F-15 installation. Tested in the S/MTD F-15 by NASA.
Keep 'em flyin' 
TEG |
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[Airplanes are] near perfect, all they lack is the ability to forgive.
— Richard Collins
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That_Engine_Guy
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Posted: Jul 28, 2009 - 05:16 AM
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Elite 2K
Joined: Dec 14, 2005 - 05:03 AM
Posts: 2198
Location: Under the engine somewhere.
Status: Offline
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Roscoe wrote:
Interesting tidbit about the Viggen TRs. the engine was US-made, but the TR was a domestic add-on.
Was a US 'design' the PW JT8D which was a 'civil' engine. Built under licensed with the Swedish afterburner as the RM8. PW 'assisted' with the overall design of the engine, but the motors were produced in Sweden. They were manufactured by Svenska Flygmotor, who became Volvo Flygmotor, now is Volvo Arero.
The actual thrust reverser was part of the airframe, aft of the engine.
 It's cool you got to fly one Roscoe!
Keep 'em flyin'
TEG |
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[Airplanes are] near perfect, all they lack is the ability to forgive.
— Richard Collins
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muir
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Posted: Jul 29, 2009 - 06:33 PM
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Active Member
Joined: Nov 16, 2008 - 06:29 PM
Posts: 135
Status: Offline
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I think all swedish jetfighters have used american or british engines, some more modified, some less but most, if not all of them, were built in Sweden. There was always a wish to be self-reliant when it came to defense round here even if it´s less so nowadays.
Darkvarkguy
Compared to the Gripen the Viggen seems slow and needs lots and lots of runway to take off under similar circumstances. |
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I don't have a problem with alcohol, I have a problem with reality.
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darkvarkguy
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Posted: Jul 29, 2009 - 10:10 PM
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Senior member
Joined: Mar 05, 2009 - 06:01 AM
Posts: 366
Location: Raleigh, NC
Status: Offline
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muir wrote:
I think all swedish jetfighters have used american or british engines, some more modified, some less but most, if not all of them, were built in Sweden. There was always a wish to be self-reliant when it came to defense round here even if it´s less so nowadays.
Darkvarkguy
Compared to the Gripen the Viggen seems slow and needs lots and lots of runway to take off under similar circumstances.
Yeah, performance aside though, I loved those Drakens and Viggens and now the Gripen. |
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