KDTWflyer
Posts: 786
Joined: Tue Jun 29, 2004 12:51 pm

Will The Three-holer Engine Layout Be Extinct?

Fri Oct 08, 2004 12:58 pm

I don't believe we will see another widebody trijet due to the efficiency/popularity of the two-engine design is here to stay.

What do you think?


NW B744 B742 B753 B752 A333 A332 A320 A319 DC10 DC9 ARJ CRJ S340
 
gigneil
Posts: 14133
Joined: Fri Nov 08, 2002 10:25 am

RE: Will The Three-holer Engine Layout Be Extinct?

Fri Oct 08, 2004 1:01 pm

Yep... its dead. The structural support necessary for trijets makes even quads more efficient and easy to service.

N
 
DfwRevolution
Posts: 8590
Joined: Sat Jan 09, 2010 7:31 pm

RE: Will The Three-holer Engine Layout Be Extinct?

Fri Oct 08, 2004 1:11 pm

I think even the quad arrangement will begin to lose its appeal for applications under ~750,000 lb MTOW aircraft... roughly the size of the 777-300ER/200LR.

In all likelyhood the A343 will be replaced by a heavier version of the A330 twin. I don't see the A345/A346 being replaced by a twin in any way, shape, or form in the near/distant future, but as for totally-new build aircraft, twins are becoming the prefered arrangement.
 
nosedive
Posts: 2176
Joined: Sun May 23, 2004 2:18 pm

RE: Will The Three-holer Engine Layout Be Extinct?

Fri Oct 08, 2004 5:00 pm

My guess is the only place we'll be seeing a new trihole is on a BWB body...... but dont hold your breath on that one
 
will
Posts: 305
Joined: Sat May 22, 1999 12:31 am

RE: Will The Three-holer Engine Layout Be Extinct?

Fri Oct 08, 2004 5:36 pm

Never Say Never... But for now I tend to agree... No Tri-Jets for now thanks to economics, design issues, etc, etc...

Regards,

Will.....
 
AFROTC
Posts: 185
Joined: Sun Mar 14, 2004 4:59 pm

RE: Will The Three-holer Engine Layout Be Extinct?

Fri Oct 08, 2004 5:51 pm

There are still tri jets being made, dont forget about the Dassault Falcon 900EX, although its not a widebody....

[Edited 2004-10-08 10:52:39]
We've Been Looking For You, United States Airforce, Cross Into The Blue!
 
bill142
Posts: 7853
Joined: Wed Aug 04, 2004 1:50 pm

RE: Will The Three-holer Engine Layout Be Extinct?

Fri Oct 08, 2004 9:53 pm

the longer range 777's (200LR & 300ER) were orginally meant to be 3 holers but GE then found a way to make the 90's more powerfull so that the 777 would not have to be a 3 holer.
Also they seem good until the one up there needs replacing.
 
ContinentalFan
Posts: 343
Joined: Wed Nov 01, 2000 2:47 am

RE: Will The Three-holer Engine Layout Be Extinct?

Fri Oct 08, 2004 11:40 pm

Can you imagine a GE90 on the tail of a hypothetical 777LR? Wow...
 
FoxBravo
Posts: 2769
Joined: Fri Nov 21, 2003 1:34 pm

RE: Will The Three-holer Engine Layout Be Extinct?

Fri Oct 08, 2004 11:53 pm

The ever-increasing reliability of modern jet engines means that virtually all new designs going forward will be twins. And for those few applications where additional redundancy may be advisable, as Gigneil pointed out, it is easier to simply hang another pair of engines on the wings (a la A340) than to (a) design and build the complex tail structure required to house a third engine on the centerline, and then (b) service the tail-mounted engine.

And when it comes to prop planes...well, I don't expect to see a Trislander lookalike anytime soon.  Smile
Common sense is not so common. -Voltaire
 
gigneil
Posts: 14133
Joined: Fri Nov 08, 2002 10:25 am

RE: Will The Three-holer Engine Layout Be Extinct?

Sat Oct 09, 2004 12:34 am

the longer range 777's (200LR & 300ER) were orginally meant to be 3 holers but GE then found a way to make the 90's more powerfull so that the 777 would not have to be a 3 holer.


No, they weren't. Boeing never would have built the aircraft.

There was apparently some small consideration given to a thrusting APU... but again, would never have made it to the real world.

N