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  #51  
Old 07-09-2017, 09:51 AM
rvbuilder2002 rvbuilder2002 is offline
 
Join Date: Jul 2005
Location: Hubbard Oregon
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Quote:
Originally Posted by rongawer View Post
It's not just a matter of semantics to "inspect" versus "overhaul". However you are using both terms in the same context. One refers to measuring and evaluating for remaining service life, the other requires repairing or replacement of parts that are outside of service limits to restore the component; these are different processes, both physically - and legally in a certified aircraft. I do highly advocate inspecting and doing so on a recurring basis, at least annually and then only overhauling when the inspection condition dictates. Let me put this in context of Continental engines, which I am intimately familiar with; the manual requires an inspection on various times of 50, 100, 500 hours and so on, and then states to overhaul at another time, which varies widely with the engine model.

Having been part of the process myself, I'll just have to agree to disagree with you about how the final times are set - which is really irrelavent at this point. I do agree with you that they are established on a conservative basis.

And again, your discussion of Whirlwind Propellers brings confusion - it should be applied to Whirlwind Aviation, not Whirlwind Propellers - these are two different companies and propellers. The quote I provided previously is from the WWP maintenance section of their provided manual, not a website; it's related to their fixed pitch propeller and it has NO SPECIFIC TBO listed. This thread was about fixed pitch propellers for RV-12's, not constant speed propellers.

In the end, I simply want to encourage folks to perform inspections and not blindly replace components when a timer pops up.
99.9 % of the RV-12's flying use fixed pitch ground adjustable propellers which the manufacture specifies be disassembled and inspected at each condition inspection' so the discussion is still relivent

You didn't happen to exist in another life using the user ID GMCJetPilot by any chance?
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Scott McDaniels
Hubbard, Oregon
RV-6A (aka "Junkyard Special ")
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  #52  
Old 07-09-2017, 10:22 AM
rongawer's Avatar
rongawer rongawer is offline
 
Join Date: Dec 2007
Location: Brentwood, CA
Posts: 185
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Quote:
Originally Posted by rvbuilder2002 View Post
99.9 % of the RV-12's flying use fixed pitch ground adjustable propellers which the manufacture specifies be disassembled and inspected at each condition inspection' so the discussion is still relivent

You didn't happen to exist in another life using the user ID GMCJetPilot by any chance?
No, however I am a nuclear engineer, and accuracy is important to me. We wouldn't even be having this discussion except a previous poster said:

Quote:
There are certainly newer ones coming along, such as Whirlwind, and I hope to try their 3-blade someday, but for now the TBOH periods are too low for me, as I fly about 300-350 hours per year.
He was referrring to Whirlwind Aviation propellers, which are constant speed - not Whirlwind Propellers, which are fixed pitch and do NOT have a stated TBO. He then proceeded to tell me I was wrong when I quoted the maintenance manual from the correct manufacturer when he referred to a number posted on another manufacturer's website. This is misinformation to anyone who might be looking for a fixed pitch propeller for their RV-12. And that's relevant.

Furthermore (yep, used that word...), I fly about 250 hours a years, and I will say emphatically that if you're flying 300-350 hours a year on a constant speed prop - Hartzell, MT, etc... you should be doing much more frequent inspections than just an annual condition inspection - you need to lubricate the hub. This is the crux of what got my attention.
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Ron Gawer

- RV-12 N975G, SN 120840, Build in progress...finally on the finishing kit, so, something like 90% done and 90% left to go.
- 1975 B58 Baron, N1975G (a bottomless money pit that makes building an RV look like lunch money, but it's a great airplane, hauls the family and my wife likes two engines...go figure)
- 1961 A33 Debonair, N433JC (R.I.P.)
- RV7A; didn't finish it and donated to kid's club
- Zenith CH601XL; flying somewhere in Louisiana https://youtu.be/wa_Y_A_rP_8
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  #53  
Old 07-09-2017, 09:01 PM
RFSchaller RFSchaller is offline
 
Join Date: Oct 2010
Location: Phoenix, AZ
Posts: 2,054
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Wow, guys! ... I thought my question about ELT batteries kicked a hornets nest, but it's got nothing on this fray!😜
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