The Pacific: General Aviation & Questions The place for students, instructors and charter guys in Oz, NZ and the rest of Oceania.

Coninental/Thielert

Old 11th Aug 2013, 12:46
  #1 (permalink)  
Thread Starter
 
Join Date: Feb 2000
Location: Vic
Age: 51
Posts: 438
Coninental/Thielert

So it's been 6 months since Continental (through its Chinese parent company)bought Thielert and its troublesome line of Centurion aerodiesel engines. I'm just wondering what they were thinking. The Centurion 2.0 still has a low (1200hr)TBO and the dreaded 300hr gearbox inspections, yet they have their own TD300, a version 1.0 of the SMA engine which seems to have the best tack record to date. Continental will have to spend bucketloads of cash to get it working right.

The other problem I have is how the diesel manufacturers are starting to get the engines to market. Private owners will not fly enough hrs to find all the bugs. They should be going to a flying school that flys 200,000 hrs a year, giving them a who fleet of engines to rack up hrs quickly.

I do think aerodiesels will ultimately make gasoline engines obsolete, but its going to take a lot of time and even more $.
Ozgrade3 is offline  
Old 11th Aug 2013, 13:04
  #2 (permalink)  
 
Join Date: Jan 2008
Location: Adelaide
Age: 36
Posts: 427
According to Adept Airmotive :: FAQ's

Question: Why is the ADEPT Airmotive not a compression ignition (diesel) engine?

Answer: Although diesel has certain advantages with regards to fuel consumption and economy, we donít believe that compression ignition technology is best suited to GA applications. Among the reasons for this are:

Poor relationship between torque and power
Diesel engines have to be heavier to contain higher bearing loads
Diesel engines have poor power to weight ratios
Vibration
Satisfactory power generation generally requires high turbo boost with related reliability problems
Diesel fuel weighs more than gasoline
We can meet the fuel consumption targets by using an efficient gasoline engine
Shagpile is offline  
Old 11th Aug 2013, 23:14
  #3 (permalink)  
 
Join Date: Jul 2007
Location: in the classroom of life
Age: 51
Posts: 6,879
And a turbo diesel seems to be great in your truck or car, but the SMA is the best so far in a plane, and it only kicks one goal effectively, a different fuel source from avgas.

It does other things OK, but we are talking about better.

No matter how the debates rage on here, it is hard to beat the physics.
Jabawocky is offline  
Old 12th Aug 2013, 11:15
  #4 (permalink)  
 
Join Date: Oct 2005
Location: somewhere in Oz
Age: 49
Posts: 911
I'd say the WAM120 was better than the SMA. Different power class, but it could grow into a 300hp V6
Andy_RR is offline  
Old 12th Aug 2013, 11:53
  #5 (permalink)  
 
Join Date: Jan 1999
Location: north of barlu
Posts: 6,175
Troublesome ?

On first introduction I would have agreed with you but Theilert have the engine more or less sorted now.

You must also remember that the major problem that Theilert had with the engine was a result of corrosion issues that were due to electrolytic action between the cylinder head and the hear exchanger that the airframe manufacturer had fitted.

Theilert converted aircraft did not have these problems because Theilert had control of the type of heat exchangers fitted.
A and C is offline  
Old 12th Aug 2013, 11:53
  #6 (permalink)  
 
Join Date: Nov 2007
Location: Mars
Posts: 412
and it only kicks one goal effectively, a different fuel source from avgas.
That's a pretty big goal.
Clearedtoreenter is offline  
Old 13th Aug 2013, 00:16
  #7 (permalink)  
 
Join Date: Sep 2002
Location: Enzed
Posts: 2,209
On first introduction I would have agreed with you but Theilert have the engine more or less sorted now.
Just remind me again, What's the TBO on the gear boxes?
27/09 is offline  
Old 13th Aug 2013, 02:11
  #8 (permalink)  
 
Join Date: Oct 2005
Location: somewhere in Oz
Age: 49
Posts: 911
My sources familiar with the matter tell me that the gearbox TBO is a bit of a ruse and they are not even opened up, let alone overhauled. Inspection through an inspection plug hole at best.

They also say that the UAV engines have moved waaay beyond the capabilities of the manned version which won't be catching up any time soon due to the certification hassles.

Maybe the Chinese will run things differently.
Andy_RR is offline  

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


Thread Tools
Search this Thread

Contact Us Archive Advertising Cookie Policy Privacy Statement Terms of Service

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.