RE: ringed engine break in?  
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RE: ringed engine break in? - 6/2/2006 4:32:00 AM   
loughbd


 

Posts: 2111
Joined: 11/29/2003
From: Bremerton, WA, USA
Status: offline 		You must be kidding. The tolerances in a auto engines are nothing compared to a model airplane engine. Cox tolerances were with in 25 MILLIONTHS of an inch. NO auto engine ever had tolerances that close. Thousandths of and inch at best in auto engines. The rings aren't part of the break in in an auto engine????? That is one of the biggest part of auto engine break in. The rings must wear and mate with the cylinder. Rings are made out of cast iron and relatively soft so they will wear in. That's why a new engine will burn oil oil until the rings break in. Chrome rings take forever to break in and wear the cylinder much faster.

Temp in an auto engine is controlled by water temp??? Tell me about Volkswagon and Porche. Remember the Corvair? That goes for airplane engines too. Not a whole lot of water cooled aircraft engines out there.

Auto engines have two compression rings. Have you ever looked into the cylinder of a McCoy 60? Or a Forster 99, or any of several other model airplane engines? They have TWO compression rings.

Fuel in an auto engine is contolled by computer and fuel injection?? I just looked under the hoods of my 58 and 64 Cadillacs trying to find a computer and fuel injection system. I sure couldn't one. I drive an 81 Datsun 210 every day to Tacoma. It has a one barrel carburettor and there sure ain't no computer under the hood. My 85 Caravan has a two barrel carb.

Bon Ami in the venturi?? Yes sir, break in the rings and wear out the crankcase bushing or ball bearings as well as the rod bearing at the same time. Let's pour carborundum in there and really speed up the process.

That's enough for this post.

(in reply to Flyboy Dave)
       Post #: 51

RE: ringed engine break in? - 6/2/2006 4:36:56 AM   
William Robison



Posts: 20269
Joined: 11/10/2002
From: Mary Esther, Florida, FL, USA
Status: offline 		Bopper:

And I laugh when I see yur avatar - I recognize the picture. Want to buy a vowel?

Haw.

Bill.


_____________________________

Real Airplanes have Two Engines
AMA 25139 - More than 40 years.

(in reply to Big Bopper)
       Post #: 52

RE: ringed engine break in? - 6/2/2006 4:44:52 AM   
proptop



Posts: 4508
Joined: 10/18/2002
From: Rome, NY, USA
Status: offline 		Aaahhh man...I love this place!

_____________________________

It's bad luck to be superstitious...
Revver Bro #77

(in reply to William Robison)
       Post #: 53

RE: ringed engine break in? - 6/2/2006 5:05:26 AM   
Flyboy Dave



Posts: 13466
Joined: 3/20/2002
From: San Bernardino County, CA, USA
Status: online 		Bill....

....I see now that loughbd hasn't a clue. He wants to argue about everything.

Maybe he wants to buy a vowel.....

FBD.

_____________________________

An engineer says.... "That won''t work".
A mechanic says..."Oh yeah, watch this".
"Old Age, and Treachery will overcome youth and skill".
Revver Bro #4.

(in reply to proptop)
       Post #: 54

RE: ringed engine break in? - 6/2/2006 5:17:04 AM   
loughbd


 

Posts: 2111
Joined: 11/29/2003
From: Bremerton, WA, USA
Status: offline 		I don't have a clue??? I'm not the one that said auto engines don't need a break in and that the rings in a car engine don't wear in. I'm also not the guy that said the tolerances in an auto engine are tighter than in a model engine. YOU did.Why is it when I say something, it's arguing but when YOU say something it's the gospel truth not to be contradicted or questioned????

< Message edited by loughbd -- 6/2/2006 5:26:47 AM >

(in reply to Flyboy Dave)
       Post #: 55

RE: ringed engine break in? - 6/2/2006 5:17:11 AM   
William Robison



Posts: 20269
Joined: 11/10/2002
From: Mary Esther, Florida, FL, USA
Status: offline 		Dave:

What Bruce is neglecting to mention, or even consider, is that a one thousandth inch error on a four inch small block Chevy bore is equivalent to a 0.000001" error on the 0.401" bore of a Cox 0.049 engine. Roy Cox claimed one millionth inch accuracy, but I've measured as much as a tenth of a thousandth difference in brand new Cox pistons. Cox' claim was mainly hype, but they were close enough that most could be run without hand fittung.

And yes, I was on speaking terms with Roy Cox in the early 1960s, Bruce. Also Johnny Brodbeck, Bill Wisniewski, and... Want to drop some more names, Bruce?

Bill.


_____________________________

Real Airplanes have Two Engines
AMA 25139 - More than 40 years.

(in reply to Flyboy Dave)
       Post #: 56

RE: ringed engine break in? - 6/2/2006 5:36:11 AM   
loughbd


 

Posts: 2111
Joined: 11/29/2003
From: Bremerton, WA, USA
Status: offline 		So was I pal, Working in the industry you get to meet and know lot's of the big boys. Ralph Brooke, Hazel Sig, Maxey Hester, Joe bridi, Ken Willard, Cliff Werick, Jack Albrecht, Garland Hamilton. I was at Ken Willard's funeral and my dad was a pall bearer. Knew and flew with all of them. Big deal. Drop all the names you want. Wanna see a picture of me and Hazel Sig. Want to see a picture of their house?



As far as tolerances go a millionth of an inch is a millionth of an inch. Doesn't matter if it was in a 10,000 cubic inch Submarine diesel or a Cox 010.

(in reply to William Robison)
       Post #: 57

RE: ringed engine break in? - 6/2/2006 5:41:25 AM   
Flyboy Dave



Posts: 13466
Joined: 3/20/2002
From: San Bernardino County, CA, USA
Status: online
quote:

loughbd
Cox tolerances were with in 25 MILLIONTHS of an inch.


...yeah sure. I guess Bruce believes everything he reads.



_____________________________

An engineer says.... "That won''t work".
A mechanic says..."Oh yeah, watch this".
"Old Age, and Treachery will overcome youth and skill".
Revver Bro #4.

(in reply to William Robison)
       Post #: 58

RE: ringed engine break in? - 6/2/2006 5:45:29 AM   
loughbd


 

Posts: 2111
Joined: 11/29/2003
From: Bremerton, WA, USA
Status: offline 		I beg the forgiveness of the great masters. I will never question your authority and vast undeniable knowledge again. I forgot that I was one of the average morons with the knowldge of a rock. Who am I to even question the experts?

Good night

(in reply to loughbd)
       Post #: 59

RE: ringed engine break in? - 6/2/2006 5:46:52 AM   
Rcpilot


 

Posts: 6556
Joined: 3/20/2002
From: Arvada, CO, USA
Status: offline 		There's no forgiving your recent performance.

Now go away and let the experts teach the newbies.

_____________________________

Airplanes have expiration dates. It''s just not printed anywhere on them.
I''m not really an airplane pilot; but I did stay at a Holiday Inn Express last night.

(in reply to loughbd)
       Post #: 60

RE: ringed engine break in? - 6/2/2006 5:52:05 AM   
proptop



Posts: 4508
Joined: 10/18/2002
From: Rome, NY, USA
Status: offline 		Guys...I don't want to be argumentative, just curious...
How did they (Cox, or anybody else for that matter ) manage to get such close tolerances without such things as CNC machines? Hand fitting?
I worked in a fully equipped machine shop for a few years (until my mom had a stroke, so I'm taking time off to take care of her ) and ran parts on CNC lathes and mills, and the closest we ever bothered with was 5 tenths (half a thou )

Even 25 millionths...just one little spec of dust under the micrometer and that would throw off youir reading...right?!?

_____________________________

It's bad luck to be superstitious...
Revver Bro #77

(in reply to Flyboy Dave)
       Post #: 61

RE: ringed engine break in? - 6/2/2006 5:52:04 AM   
loughbd


 

Posts: 2111
Joined: 11/29/2003
From: Bremerton, WA, USA
Status: offline 		I do when it's written by people like Clarence Lee, George Aldrich, Dave Gierke etc. Those are well known authorities on the subject. Outside of RCU you guys are nobodies. Even here you are pretty much nobodies. Legends in your own minds.

(in reply to Flyboy Dave)
       Post #: 62

RE: ringed engine break in? - 6/2/2006 5:57:55 AM   
Flyboy Dave



Posts: 13466
Joined: 3/20/2002
From: San Bernardino County, CA, USA
Status: online 		Proptop....

....answer....they didn't. Member loughbd is loaded with "interesting misconceptions".

FBD.

_____________________________

An engineer says.... "That won''t work".
A mechanic says..."Oh yeah, watch this".
"Old Age, and Treachery will overcome youth and skill".
Revver Bro #4.

(in reply to loughbd)
       Post #: 63

RE: ringed engine break in? - 6/2/2006 6:08:01 AM   
Rcpilot


 

Posts: 6556
Joined: 3/20/2002
From: Arvada, CO, USA
Status: offline 		I think the only thing thats ever been accurately measured down to 25 millionths was a crickets weenie. But that was in 1965, so who really knows if the instruments were accurate?

_____________________________

Airplanes have expiration dates. It''s just not printed anywhere on them.
I''m not really an airplane pilot; but I did stay at a Holiday Inn Express last night.

(in reply to Flyboy Dave)
       Post #: 64

RE: ringed engine break in? - 6/2/2006 6:11:09 AM