PPRuNe Forums

Go Back   PPRuNe Forums > Ground & Other Ops Forums > Engineers & Technicians
Forgotten your Username/Password?

Engineers & Technicians In this day and age of increased CRM and safety awareness, a forum for the guys and girls who keep our a/c serviceable.


Reply
 
Thread Tools
Old 11th Jun 2008, 23:58   #21 (permalink)
 
Join Date: Jun 2007
Location: California
Posts: 15
I'd love to hear what you come up with, mate!
MrSkyGuy is offline   Reply
Old 12th Jun 2008, 08:47   #22 (permalink)
 
Join Date: Oct 2007
Location: UK
Age: 47
Posts: 137
Don't confuse BAE (Or Hawker Sydley) press releases to the industry and advertisement claims against real reasons.

Budget. Budget. Budget.

When the aircraft was fist designed in the late 60's - 70's, the choice of engines that had been through the (lengthy and expensive) certification process was limited.

The Texxtron/Lycoming (then) engine variant had been in helios in vietnam and was based on a older core engine from a tank (although Honeywell think it was a completely different engine).

I don't know why people are mentioning "Hot and High", the ALF 502 is very asthmatic with limited turbine margin on a good day and the later 507 on the RJ is not much better.

I've worked on 146's/Rj's on and off for 12 years and the above is just stuff I've picked up on various courses over the years.

The RJX should have been designed with 2 larger motors IMO, 4 Donkeys on a regional jet did scare people who were awaiting the Embraer 170/190 family coming off the drawing board.

Last edited by Vortechs Jenerator; 16th Jun 2008 at 10:10.
Vortechs Jenerator is offline   Reply
Old 12th Jun 2008, 12:03   #23 (permalink)
 
Join Date: Dec 2005
Location: Watford
Age: 61
Posts: 78
The 502's in the first 146's were really unreliable dogs,it was a good job there were four of them(& a good job they're easy to change).
When Allied Signal acquired Textron Lycoming they spent a small fortune on increasing the reliability & these days they're not too bad.
The 507's in the RJ's have the increased temp margin but are still prone to the occasional uncontained failure.
WOTME? is offline   Reply
Old 12th Jun 2008, 15:51   #24 (permalink)
 
Join Date: Feb 2001
Location: UK
Posts: 438
Quote:
Why Four Engines?
Easy, the wings weren't long enough for 6.
Golden Rivet is offline   Reply
Old 12th Jun 2008, 16:31   #25 (permalink)
 
Join Date: Jun 2007
Location: California
Posts: 15
Ayuk ayuk.
MrSkyGuy is offline   Reply
Reply
 
 
 


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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT. The time now is 13:32.


vBulletin® v3.8.7, Copyright ©2000-2014, vBulletin Solutions, Inc.
SEO by vBSEO 3.6.1
1996-2012 The Professional Pilots Rumour Network