VansAirForceForums  
Home > VansAirForceForums

- POSTING RULES
- Donate yearly (please).
- Advertise in here!

- Today's Posts | Insert Pics


Go Back   VAF Forums > RV Firewall Forward Section > Traditional Aircraft Engines
Register FAQ Members List Calendar Search Today's Posts Mark Forums Read

Reply
 
Thread Tools Search this Thread Display Modes
  #11  
Old 10-03-2018, 07:12 PM
Captain Avgas Captain Avgas is offline
 
Join Date: Oct 2005
Location: Melbourne, Australia
Posts: 1,868
Default

The questions you are asking and your assembly mistakes would seem to indicate that you may not have the appropriate expertise to assemble your own engine. You would be much safer getting a qualified person to do it for you. If the engine parts are already overhauled then getting it reassembled should not be a costly exercise. An aircraft engine is a life support system. This is not an area where you want to put your life, and your passengers lives, at risk just to save a modest amount of money.
__________________
You’re only as good as your last landing
Bob Barrow
RV7A
Reply With Quote
  #12  
Old 10-03-2018, 08:02 PM
filiperosa filiperosa is offline
 
Join Date: Oct 2017
Location: Portugal
Posts: 81
Default

Quote:
Originally Posted by Captain Avgas View Post
The questions you are asking and your assembly mistakes would seem to indicate that you may not have the appropriate expertise to assemble your own engine. You would be much safer getting a qualified person to do it for you. If the engine parts are already overhauled then getting it reassembled should not be a costly exercise. An aircraft engine is a life support system. This is not an area where you want to put your life, and your passengers lives, at risk just to save a modest amount of money.
Hello Bob,
I had rebuild one O200 on the past. My question was the flexible I had about mix them up since I knew I shouldn't do it according to the manual but not why or if it would not be a problem. Now I understood I am not able to make it and the reasons for this is why I appreciate the help on the forum. I did not make the mistake of mix the parts, just wanted to know if that was possible and the reason.

About the rod mounted with the number opposite, I realize the direction and this was the reason for my question. I am following all assembly according to with the manual step by step with the help and supervision of a certified mechanic, however, he know how to do the things but not the reason. My main aim to post on the forum was to understand not to do according to or against the manual but the why/reason of it.

Thanks!

Last edited by filiperosa : 10-03-2018 at 08:09 PM.
Reply With Quote
  #13  
Old 10-04-2018, 05:56 AM
daddyman's Avatar
daddyman daddyman is offline
 
Join Date: Jan 2014
Location: Fredericksburg, Virginia
Posts: 288
Default If it were a car...

Quote:
Originally Posted by filiperosa View Post
Hello Bob,
I had rebuild one O200 on the past. My question was the flexible I had about mix them up since I knew I shouldn't do it according to the manual but not why or if it would not be a problem. Now I understood I am not able to make it and the reasons for this is why I appreciate the help on the forum. I did not make the mistake of mix the parts, just wanted to know if that was possible and the reason.

About the rod mounted with the number opposite, I realize the direction and this was the reason for my question. I am following all assembly according to with the manual step by step with the help and supervision of a certified mechanic, however, he know how to do the things but not the reason. My main aim to post on the forum was to understand not to do according to or against the manual but the why/reason of it.

Thanks!
If you were building a car engine your thoughts about balancing would be correct, but as mentioned in the previous replies, there ARE differences in aircraft engines.

Daddyman
Reply With Quote
  #14  
Old 10-04-2018, 11:06 AM
tjo tjo is offline
 
Join Date: Dec 2009
Location: La Center,wa
Posts: 210
Default

I am not an engine expert, so no advice there. Just wanted to say don't let any negative feedback deter you form asking questions!

Tim
Reply With Quote
  #15  
Old 10-04-2018, 12:12 PM
Stoppel Stoppel is offline
 
Join Date: Jul 2015
Location: Cole camp, mo
Posts: 24
Default No, please no

Please don?t mix up or invert the rod caps on anything, aircraft or auto. Balancing of rods is not performed in any field that I?m aware of by mixing and matching. The rod caps are typically milled, bolted on, torqued and then line bored/honed to size making each assembly unique. In the automotive field once this occurs then minor sanding or grinding of certain areas of the rod is performed in order to balance. I?m sure others know much more than I about this however it is very alarming thinking someone would attempt to switch rod caps as it is certainly a recipe for catastrophic failure.
__________________
James Stoppel
RV8 Purchased Flying
Reply With Quote
  #16  
Old 10-04-2018, 12:55 PM
filiperosa filiperosa is offline
 
Join Date: Oct 2017
Location: Portugal
Posts: 81
Default

Quote:
Originally Posted by tjo View Post
I am not an engine expert, so no advice there. Just wanted to say don't let any negative feedback deter you form asking questions!

Tim
Thanks Tim,
That was the primary objective of my question. An idea came to my head and I decided to ask about that idea. From the beginning, I knew what was on the manual but I think is always a good idea to discuss things and why something don´t work or it might work.


Quote:
Originally Posted by Stoppel View Post
Please don’t mix up or invert the rod caps on anything, aircraft or auto. Balancing of rods is not performed in any field that I’m aware of by mixing and matching. The rod caps are typically milled, bolted on, torqued and then line bored/honed to size making each assembly unique. In the automotive field once this occurs then minor sanding or grinding of certain areas of the rod is performed in order to balance. I’m sure others know much more than I about this however it is very alarming thinking someone would attempt to switch rod caps as it is certainly a recipe for catastrophic failure.
Thank you all. I am not mixing up anything and not doing any balance. I saw the manual and something come to my head and I decided to come to the forum to ask the possibility. I understood that is not possible but more important than that. I understood why and good explanations and that was what I was looking. Thank you all for it.

Filipe
Reply With Quote
  #17  
Old 10-04-2018, 01:29 PM
DanH's Avatar
DanH DanH is offline
 
Join Date: Oct 2005
Location: 08A
Posts: 9,500
Default

Quote:
Originally Posted by filiperosa View Post
Now that we've thoroughly covered "don't swap the rod caps", so let's go back to the last photo. Per the manual, the numbers should face down, toward the sump. Number 1 is the right front cylinder. See the error?
__________________
Dan Horton
RV-8 SS
Barrett IO-390
Reply With Quote
  #18  
Old 10-04-2018, 01:50 PM
lr172 lr172 is offline
 
Join Date: Oct 2013
Location: Schaumburg, IL
Posts: 5,297
Default

Quote:
Originally Posted by daddyman View Post
If you were building a car engine your thoughts about balancing would be correct, but as mentioned in the previous replies, there ARE differences in aircraft engines.

Daddyman
This is incorrect. The rods in auto and aircraft engines are fundamentally the same design and balanced the same way. The OP's approach would be just as wrong on an auto engine.

Larry
__________________
N64LR - RV-6A / IO-320, Flying as of 8/2015
N11LR - RV-10, Flying as of 12/2019
Reply With Quote
  #19  
Old 10-04-2018, 04:26 PM
filiperosa filiperosa is offline
 
Join Date: Oct 2017
Location: Portugal
Posts: 81
Default

Quote:
Originally Posted by DanH View Post
Now that we've thoroughly covered "don't swap the rod caps", so let's go back to the last photo. Per the manual, the numbers should face down, toward the sump. Number 1 is the right front cylinder. See the error?

Hello Dan.
As per the photo all the numbers are facing down. My red circles are the dots/markers/notches, do not know the name in English since it is not my main language. But the numbers are down and the dots up. Do not see the mistake, can you point me?
Filipe
Reply With Quote
  #20  
Old 10-04-2018, 05:25 PM
DanH's Avatar
DanH DanH is offline
 
Join Date: Oct 2005
Location: 08A
Posts: 9,500
Default

Quote:
Originally Posted by filiperosa View Post
Hello Dan.
As per the photo all the numbers are facing down. My red circles are the dots/markers/notches, do not know the name in English since it is not my main language. But the numbers are down and the dots up. Do not see the mistake, can you point me?
Filipe
Ok then, you're good. I was mistaken; thought you had numbers up.
__________________
Dan Horton
RV-8 SS
Barrett IO-390
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 03:27 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.