RR 250-C20 temperatures at idle
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Join Date: Jul 2011
Location: south-east europe
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RR 250-C20 temperatures at idle
Hey,
I need some data.
According to your experience, what’s the usual TOT at idle for RR 250-C20?
I know it depends on installation, OAT, etc., just need approximate values.
I’m more curious for C20W variant, but I would appreciate any information for the other variants of RR250 as well.
Thanks in advance.
I need some data.
According to your experience, what’s the usual TOT at idle for RR 250-C20?
I know it depends on installation, OAT, etc., just need approximate values.
I’m more curious for C20W variant, but I would appreciate any information for the other variants of RR250 as well.
Thanks in advance.
Sorry, no f.... clue- but who cares at idle anyway?
Sure there are starting and operating limits in the handbook which needs to be observed.
But if you need to know
https://www.rolls-royce.com/products-and-services/civil-aerospace/helicopters/m250-turboshaft.aspx#training
Scroll down - and write an Email to support.....
Sure there are starting and operating limits in the handbook which needs to be observed.
But if you need to know
https://www.rolls-royce.com/products-and-services/civil-aerospace/helicopters/m250-turboshaft.aspx#training
Scroll down - and write an Email to support.....
Join Date: Dec 2011
Location: Oregon, US
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Who cares?
We do. Every pilot records them every day, and a power check in flight too.
We trend them, and have caught problems early that way.
All installed in 500's
C20B#1 shows a low of 426C@-6C OAT to 544 at 40C 2,000pa (A miserable humid day in NW Missouri)
C20B#2 shows a low of 423@-1C 517@32C 2,000pa
Pretty much linier movement in-between,
C20Rs run hotter
My weakest C20R is showing 518C at 0C and 608C at 33C at sea level
A stronger C20R I have is showing 492 at -4C (3000') 605C at 38C at 2000' pa
Another strong one was showing 498C at -9 (6000') and has been consistently showing 601C at 28 (3000') lately.
Average is about about 500 at 0C and 590s at 33C near sea level
We do. Every pilot records them every day, and a power check in flight too.
We trend them, and have caught problems early that way.
All installed in 500's
C20B#1 shows a low of 426C@-6C OAT to 544 at 40C 2,000pa (A miserable humid day in NW Missouri)
C20B#2 shows a low of 423@-1C 517@32C 2,000pa
Pretty much linier movement in-between,
C20Rs run hotter
My weakest C20R is showing 518C at 0C and 608C at 33C at sea level
A stronger C20R I have is showing 492 at -4C (3000') 605C at 38C at 2000' pa
Another strong one was showing 498C at -9 (6000') and has been consistently showing 601C at 28 (3000') lately.
Average is about about 500 at 0C and 590s at 33C near sea level
Figures for an C20B enhanced turbine 100TTSO ( all new wheels) and newish compressor with 6 new wheels and new case halves
Idle ( after 2 min idle on shut down cycle ) 300 ft plus 20 outside 1020mb 495 degrees
Idle ( after 2 min idle on shut down cycle ) 300 ft plus 20 outside 1020mb 495 degrees