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  #1  
Old 03-14-2021, 06:56 PM
petehowell's Avatar
petehowell petehowell is offline
 
Join Date: Jan 2005
Location: MN
Posts: 2,310
Default 2400 Hour Report

Mom is 2 weeks post vax and I have not seen her for a year, so it was time to go have lunch in South Bend!! Got six hours of seat time and 3 hours with mom. We kept our distance, but had a great meal on the deck. The O-320 purred like a kitten, down and back. Oil consumption is still in the 1.5 qt/50 hours range and Oil pressure still looks great. I'm looking for signs she is getting tired.

Those 6 hours put me right at 2400, so I dropped the oil, checked the filter and scoped the valves. No chunks in the screen, and the typical carbon in the filter. Compression tested the cylinders as well- took the data on a cold engine.

78 75 78 78

Here is your valve porn:

Intake 1


Exhaust 1


In 2


Ex 2


In 3


Ex 3


In 4


Ex 4
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Cheers,
Pete

Amateur Plane - RV-9A N789PH - 2550+ Hrs
Amateur Radio - KD0CVN
Doggies Delivered - 25+
St. Paul, MN

Last edited by petehowell : 03-16-2021 at 10:20 PM.
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  #2  
Old 03-14-2021, 07:09 PM
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Vlad Vlad is offline
 
Join Date: Oct 2008
Location: Utah
Posts: 8,548
Default

The valves look almost like mine. At 5300+
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  #3  
Old 03-14-2021, 08:14 PM
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petehowell petehowell is offline
 
Join Date: Jan 2005
Location: MN
Posts: 2,310
Default No chance!

Quote:
Originally Posted by Vlad View Post
The valves look almost like mine. At 5300+
The more I fly, the further ahead you get Vlad!! Always chasing!
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Pete

Amateur Plane - RV-9A N789PH - 2550+ Hrs
Amateur Radio - KD0CVN
Doggies Delivered - 25+
St. Paul, MN
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  #4  
Old 03-14-2021, 09:04 PM
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AlexPeterson AlexPeterson is offline
 
Join Date: Sep 2005
Location: Ottertail, MN
Posts: 2,533
Default

Quote:
Originally Posted by Vlad View Post
The valves look almost like mine. At 5300+
Vlad, I wouldn't think anyone is close to you for TT on a 9/9A! Only a couple RV's of any type have more than that.
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RV6A N66AP 1750+ hours
KADC, Wadena, MN
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  #5  
Old 03-14-2021, 09:16 PM
David Z David Z is offline
 
Join Date: Aug 2010
Location: Thunder Bay Ontario
Posts: 936
Default

What is the design life of an RV airframe?

I know most things can be maintained forever, but at some point it's just not worth replacing internal structural bits. Spars, longerons, etc.
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Empennage Passed Pre-close Inspection
Wings mostly done
Fuselage assembly, it's a riveting job!
83126
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  #6  
Old 03-14-2021, 09:36 PM
FlyinTiger FlyinTiger is offline
 
Join Date: Feb 2009
Location: Gilbert, SC
Posts: 336
Smile 2400 hours on engine?

Thanks for the pictures and info. I'm assuming this is a post showing 2400 hours on your engine, original cylinders etc.

Great data points. I fully intend to run my Lycoming well past TBO and only do something to it on condition.

My O-320 was flying over 2300 hours and still running nicely on the RV-4 I sold a couple years ago. It had a Catto fixed pitch 3-blade propeller and was smooth as glass, compressions in the low 70s warm, high 60s cold, great boroscope and no metal being made.

Trick is to fly them, get them up to temperature at least a few times a month and change the oil as prescribed, 4 months or 50 hours, whichever comes first.

Do you run MOGAS or 100LL? Which oil are you using?

I don't think it really matters as long as we fly, get them up to temperature and change oil regularly.
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  #7  
Old 03-14-2021, 09:51 PM
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petehowell petehowell is offline
 
Join Date: Jan 2005
Location: MN
Posts: 2,310
Default

Hi Al,

Yep 2400 on the original engine, original cylinders. I run mostly 91 Mogas LOP and have used Phillips XC oil from the very first start.

I agree - flying and changing oil is key.


Quote:
Originally Posted by FlyinTiger View Post
Thanks for the pictures and info. I'm assuming this is a post showing 2400 hours on your engine, original cylinders etc.

Great data points. I fully intend to run my Lycoming well past TBO and only do something to it on condition.

My O-320 was flying over 2300 hours and still running nicely on the RV-4 I sold a couple years ago. It had a Catto fixed pitch 3-blade propeller and was smooth as glass, compressions in the low 70s warm, high 60s cold, great boroscope and no metal being made.

Trick is to fly them, get them up to temperature at least a few times a month and change the oil as prescribed, 4 months or 50 hours, whichever comes first.

Do you run MOGAS or 100LL? Which oil are you using?

I don't think it really matters as long as we fly, get them up to temperature and change oil regularly.
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Pete

Amateur Plane - RV-9A N789PH - 2550+ Hrs
Amateur Radio - KD0CVN
Doggies Delivered - 25+
St. Paul, MN
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  #8  
Old 03-15-2021, 05:24 PM
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avrojockey avrojockey is offline
 
Join Date: Aug 2019
Location: Appleton, WI
Posts: 493
Default

Quote:
Originally Posted by David Z View Post
What is the design life of an RV airframe?

I know most things can be maintained forever, but at some point it's just not worth replacing internal structural bits. Spars, longerons, etc.
I doubt Van's or anyone else would place a number on this given variations in builds and flying conditions that contribute to fatigue life, but my guess is it's a long time...like Douglas quality long, not the current cycle limited disposable models of airliners built these days.
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  #9  
Old 03-16-2021, 12:38 AM
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rv8ch rv8ch is offline
 
Join Date: Feb 2005
Location: LSGY
Posts: 4,788
Default

Quote:
Originally Posted by petehowell View Post
... Oil consumption is still in the 1.5 qt/50 hours range and Oil pressure still looks great. I'm looking for signs she is getting tired.

Those 6 hours put me right at 2400, so I dropped the oil, checked the filter and scoped the valves. No chunks in the screen, and the typical carbon in the filter. Compression test will happen tomorrow - will add data from that to this post.

Here is your valve porn:

...
I doubt it can get much better than that! What are you using to take those pictures? I "borescoped" mine this weekend with the VA-400 and was not overly impressed with the photos.
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  #10  
Old 03-16-2021, 05:33 AM
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rv6ejguy rv6ejguy is offline
 
Join Date: Mar 2005
Location: Calgary, Canada
Posts: 6,260
Default

I always enjoy your posts Pete. If anyone needs confirmation that LOP and Mogas isn't hard on a Lycoming... here it is.
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Ross Farnham, Calgary, Alberta
Turbo Subaru EJ22, SDS EFI, Marcotte M-300, IVO, Shorai- RV6A C-GVZX flying from CYBW since 2003- 457.6 hrs. on the Hobbs,
RV10 95% built- Sold 2016
http://www.sdsefi.com/aircraft.html
https://www.youtube.com/channel/UCiy...g2GvQfelECCGoQ


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