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PaulW
Joined: 14 May 2013
Posts: 25
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 Posted: Tue Jul 29, 2014 10:11 pm Post subject: V530TA-D35 Overhaul requirement |
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Hi
I can't find this on Matronics nor anywhere else on Internet, hence my question.
What is the requirement from Manufacturers perspective, but also recommended for this prop V530TA-D35 on a YAK-52:
1. doing Aero's
2. normal flying
I believe that the manufacturer recommended from the old Russian logbook 400 hours or 6 years, our local Russian AMO says 500 hours or 5 years.
Our local Prop Centre says at least 3 years if you do Aero's due to torgue/forces on the prop.
Our current prop is at +-220 hours Since overhauled, but last overhaul 2004. Total hours +-860 and manufactured 1988
However it was removed at 131 hours and 1 year from aircraft in 2005.
It had 2 MPI inspections between 2005 and 2013
Was fitted to aircraft again in 2013 at 161 hours.
So it "flew" approx 30 hours on another aircraft.
It is currently in the Prop Centre as there was some wear and tear on the Furrells which need repair. (caused slight play on blades)
This is in South Africa flying Non Type Certified or similar to Experimental in other countries.
However, from safety aspect, what is the recommendation regarding overhaul timelines?
Any advise for us?
regards
Paul
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Steve Geard
Joined: 09 Dec 2013
Posts: 36
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| Posted: Wed Jul 30, 2014 4:26 pm Post subject: Re: V530TA-D35 Overhaul requirement |
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As I've just fitted some new Whirlwind composite blades to my original hub in my Yak55m I would be also be interested to know peoples opinions on this.
Aerobatics could mean a large range of things ... I'm doing a fair amount of flat spins, snaps and Lomcevaks at high power settings. This must stress the hub a lot more than a simple loop. I am also having some vibration issues.
The hubs got 360 hrs on it. 90% of those hours are moderate to serious aerobatics. What the overhaul time in that scenario ?
Cheers Steve/
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richard.goode(at)russiana
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| Posted: Thu Jul 31, 2014 12:32 am Post subject: V530TA-D35 Overhaul requirement |
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Officially for the V - 530 it is six years or 500 hours, and a two-year
"shelf life" after overhaul before being used. So the total calendar life
becomes seven years. However, once it is used, the calendar life continues
to accumulate so, officially, you can't keep removing a propeller and then
putting it back on again and only counting the time that it is mounted on
the aircraft.
In the end, it must depend what your local authorities rule, but having had
a major propeller failure on a VP prop myself, I would not wish this on
anyone!
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
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Steve Geard
Joined: 09 Dec 2013
Posts: 36
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| Posted: Thu Jul 31, 2014 2:22 pm Post subject: Re: V530TA-D35 Overhaul requirement |
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Thank you Richard. I would guess calendar life covers things such as corrosion, seal life, lubricant life. I can't see how a blanket 500 hrs operation limit covers the huge variety of stress props can be put under. One would think both the 5 years and 500 hrs are based on hardest use scenario. humid salt air environment ; Yak55, Su26--31 type of use. You didn't mention what failed on you VP incident. Did you have to abandon the aircraft? ..... Time to have my chut repacked.... 
But seriously, what fails on these hubs, is there on underlying weakness?
Thanks for your time Steve Yak55m NZ.
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richard.goode(at)russiana
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| Posted: Thu Jul 31, 2014 11:23 pm Post subject: V530TA-D35 Overhaul requirement |
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To clarify some points:
*The Russians make no distinction in terms of the use of the prop, although
it is clear that aerobatic use must impose much greater loads. It is worth
noting that MT advise an overhaul schedule of one third normal for
propellers "used in unlimited level aerobatics".
*In any case, the Russians are always incredibly conservative, and I am sure
that with gentle use, the V-530 could be operated safely well beyond the
manufacturers ruling.
*My own propeller failure was not with a V-530 prop - indeed I have never
heard of any significant failure with these propellers.
Richard Goode Aerobatics
Rhodds Farm
Lyonshall
Hereford
HR5 3LW
Tel: +44 (0) 1544 340120
Fax: +44 (0) 1544 340129
www.russianaeros.com
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Steve Geard
Joined: 09 Dec 2013
Posts: 36
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| Posted: Tue Aug 05, 2014 2:56 pm Post subject: Re: V530TA-D35 Overhaul requirement |
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Thank you Richard, thats a bit more reassuring.
I've still had my chut repacked tho. 
My 55m will have 400hrs by the end of this year, so we're gona take the wings off and check the attachments, replace the bolts. We'll also have a really good inspection of the hub. She's now got composite blades which are more accurate and lighter than the original, not sure if that reduces the strain on the hub or not? They are 4.5" longer.
Thank you for your posts.
Steve. NZ.
P.S. Do you have any oversize wing bolts for a 55m? I need 4 , not sure what size to ream the holes?
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