Chamonix
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Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 12:59 pm

Did 727s have no R/T on the #2 engine?
Ditto for the L-1011?
 
Northwest727
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RE: Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 1:26 pm

The only trijets I know of that do not have reverse thrust on the #2 engine are the Dassault Falcon 50/900/7X and the Tupolev Tu-154. The L-1011 and the 727 did have reverse thrust on the #2 engine. As did the DC-10/MD-11.

Judging by photos, I think the Yakovlev Yak-40/42 and the Hawker Siddeley HS 121 Trident don't have reverse thrust on the #2 engine either, but somebody correct me if I'm wrong.
 
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tb727
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RE: Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 1:57 pm

Quoting Chamonix (Thread starter):
Did 727s have no R/T on the #2 engine?

The 727-100QF(Quiet Freighter) conversion that UPS did with the Tay engines removed the TR from the #2 engine.

The Super-27 mod with the -217 engines also has the #2 TR removed.
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26point2
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RE: Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 2:11 pm

Quoting Northwest727 (Reply 1):
The only trijets I know of that do not have reverse thrust on the #2 engine are the Dassault Falcon 50/900/

This is wrong, it's the other way around..... Dassault Falcon 50/900 ONLY has T/R on #2 engine. No T/R on #s 1 & 3.
 
KPWMSpotter
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RE: Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 2:54 pm

Quoting Northwest727 (Reply 1):
The only trijets I know of that do not have reverse thrust on the #2 engine are the Dassault Falcon 50/900/7X and the Tupolev Tu-154

From what I recall, the Falcon 50/900/7X are actually quite the opposite, they have reverse thrust *only* on the #2, while the #1 and 3 lack reversers. The center bucket reverser on the 900 produces a very distinctive wheezing/coughing/backfiring sound on the 900s when it's activated. You're right about the Tu-154 though, just a straight pipe there.

The Yak-40 has a T/R system similar to the Falcons, with the bucket reverser on the #2 engine only. The Yak-42 doesn't appear to have thrust reverse at all. The HS.121 lacks T/R on the #2 engine though.

A brief recap:

T/Rs on all three: B727, DC-10, MD-11, L-1011

T/Rs on #2 Only: Falcon Series, YAK-42

T/Rs on #1 and #3 only: Tu-154, HS.121
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Chamonix
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RE: Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 3:16 pm

Quoting tb727 (Reply 2):
Tay engines

Do you mean tail?
What is Tay?
Many thanks!
 
airforceatc944
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RE: Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 3:20 pm

Quoting 26point2 (Reply 3):

  

as does the 7x
 
26point2
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RE: Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 3:52 pm

Quoting Chamonix (Reply 5):
Do you mean tail?
What is Tay?

Rolls Royce Tay engines. Bypass Turbo Fan derived from R/R Spey.
 
cargolex
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RE: Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 3:54 pm

Quote:
What is Tay?

He means the Rolls-Royce Tay engine, used on the Gulfstream IV, Fokker 70/100, and a few re-engined 727-100s.

There was also a Tay conversion for the BAC 1-11 from the same company (Dee Howard engineering), but only two were actually converted. By the time it was ready, not many people wanted the 1-11 anymore and it wasn't suitable for freighter conversion.

EDIT - I see I've been beaten to the punch!

[Edited 2011-04-08 08:54:36]
 
Chamonix
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RE: Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 5:05 pm

Tay must be a river following RR nomenclature.
Only RB (Barnoldswick) and Merlin were the exceptions - hazarding a guess.

[Edited 2011-04-08 10:08:57]
The name issue: RR Trent (by Kimon Jan 28 2010 in Tech Ops)


[Edited 2011-04-08 10:26:10]
 
FlyMKG
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RE: Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 9:03 pm

We have one 727-200 at my company with the number 2 reverser removed. It has the Dugan Quiet Wing mod with JT8D-15 engines on it. Part of meeting noise compliance was to remove the reverser off of two and put a long stove pipe extension on it. It looks like this:
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Photo © Dana Low



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Chamonix
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RE: Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 9:38 pm

Would that be a 727-ADV (Advanced)?

Quoting FlyMKG (Reply 10):
We have one 727-200 at my company


[Edited 2011-04-08 14:40:02]
 
Viscount724
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RE: Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 9:48 pm

Quoting Chamonix (Reply 9):
Tay must be a river following RR nomenclature.

It's the longest river in Scotland.
 
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Jetlagged
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RE: Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 10:11 pm

Quoting Chamonix (Reply 9):
Tay must be a river following RR nomenclature.
Only RB (Barnoldswick) and Merlin were the exceptions - hazarding a guess.

RR named their piston engines after birds of prey, so the Merlin is not an exception.

RR turbine engines have a model number and a river name, though the RB211 never got named for some reason. The Tay, for example, had the model number RB183.
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FlyMKG
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RE: Trijets W/O R/T #2 Engine

Fri Apr 08, 2011 10:16 pm

Quoting Chamonix (Reply 11):
Would that be a 727-ADV (Advanced)?

We have another -200 with the Dugan Quiet Wing and JT8D-9s that still has the #2 reverser. The -9 equiped airplane used to have -15s in a previous life so it could just be a matter of which engines are on the frame.

FlyMKG
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Northwest727
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RE: Trijets W/O R/T #2 Engine

Sat Apr 09, 2011 2:23 pm

Quoting 26point2 (Reply 3):
This is wrong, it's the other way around..... Dassault Falcon 50/900 ONLY has T/R on #2 engine. No T/R on #s 1 & 3.
Quoting KPWMSpotter (Reply 4):
From what I recall, the Falcon 50/900/7X are actually quite the opposite, they have reverse thrust *only* on the #2, while the #1 and 3 lack reversers. The center bucket reverser on the 900 produces a very distinctive wheezing/coughing/backfiring sound on the 900s when it's activated. You're right about the Tu-154 though, just a straight pipe there.

Sorry, my mistake, you guys are correct.
 
KELPkid
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RE: Trijets W/O R/T #2 Engine

Sat Apr 09, 2011 6:36 pm

Quoting jetlagged (Reply 13):
RR turbine engines have a model number and a river name, though the RB211 never got named for some reason. The Tay, for example, had the model number RB183.

Well, as I understand it, the Trents share much (architecturally) with the RB.211, so it kind of sort of got a name...   I know that there are probably close to zero interchangeable parts between any RB.211's and any Trents, though.
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tb727
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RE: Trijets W/O R/T #2 Engine

Sat Apr 09, 2011 10:30 pm

Quoting FlyMKG (Reply 14):
We have another -200 with the Dugan Quiet Wing and JT8D-9s that still has the #2 reverser. The -9 equiped airplane used to have -15s in a previous life so it could just be a matter of which engines are on the frame.

Just curious, what engines you have on your -100, -9's?
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