VansAirForceForums  
Home > VansAirForceForums

-POSTING RULES
-Advertise in here!
- Today's Posts | Insert Pics

Keep VAF Going
Donate methods

Point your
camera app here
to donate fast.

  #21  
Old 05-04-2022, 07:31 AM
lr172 lr172 is online now
 
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 7,147
Default

Quote:
Originally Posted by BillL View Post
The piston crown is typically the hottest part of the piston (duh) this means that the top ring gap increases more than the second when running.
Could you elaborate on this for me? I have always been under the impression that the hotter the piston gets, the tighter/smaller the compression ring gap will become. Every tech sheet that I have seen from piston / ring manufacturers has large print warnings with a chart showing recommended ring gaps for normally aspirated and various different boost levels and nitrous shots. Greater boost (i.e. more heat) always came with larger gaps to keep from breaking lands as the gaps shrunk during running.

Larry
__________________
N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019
Reply With Quote
  #22  
Old 05-04-2022, 10:28 AM
MarkW's Avatar
MarkW MarkW is offline
 
Join Date: Sep 2011
Location: Edgewater, FL. X50
Posts: 1,193
Default

That one stumped me too. I assumed he meant decreased gap with heat. I would like to understand if I was wrong all these years.
__________________
Mark
RV9 - N14MW - Flying
G3X - ECI Titan I0-320
Catto three blade prop
http://www.mykitlog.com/MarkW
Reply With Quote
  #23  
Old 05-04-2022, 12:08 PM
Finley Atherton Finley Atherton is offline
 
Join Date: Nov 2005
Location: AUSTRALIA
Posts: 783
Default

Quote:
Originally Posted by bill.hutchison View Post
So this thread has made me nervous.

Like the poster in #13, I have an ECI Titan motor from America's Aircraft Engines.

I am trying to figure out if this A/D is applicable, because my motor was built in November of 2007.

Right in the beginning of the A/D, it says, "If your engine has not been overhauled, or not had any cylinder assemblies replaced since new, no further action is required."

I know that my engine has NOT been overhauled or had cylinders replaced since it was new. Am I overthinking this, since I know I have ECI nickel cylinders from the years this was a problem?
Bit confusing but I think the statement assumes a new genuine Lycoming engine with genuine Lycoming cylinders. Regardless you need to check if your individual ECI cylinder serial numbers are listed in the AD. (AD 2009-26-12)

I had group A cylinders that were OK till about 1,100 hrs when the rings were found to be delaminating (ECI S.I. No 06-6)

Fin 9A.

Last edited by Finley Atherton : 05-04-2022 at 12:24 PM.
Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -6. The time now is 06:57 AM.


The VAFForums come to you courtesy Delta Romeo, LLC. By viewing and participating in them you agree to build your plane using standardized methods and practices and to fly it safely and in accordance with the laws governing the country you are located in.