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cjaviator
Joined: 20 Aug 2014
Posts: 29
Location: New Zealand
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 Posted: Wed Mar 04, 2015 11:12 pm Post subject: CJ-6 prop blade query |
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Hi all,We have a standard J9-G1 prop that a previous operator has blended the face of each blade at the tips and then filled with bog.
Understandably, my prop shop wants to take crop the blades to remove the severely thinned material but are unable to as the only information we have on the blades (from the PT-6 component overhaul manual states that radius of the prop shall be 1200mm. There is no allowance or mention of cropping limits.
Anyone out there operating a CJ with cropped blades? Do you have any info to support cropping the blades?
(We want to remove (at) 19mm from each blade)
Regards, Jay
New Zealand
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wlannon(at)shaw.ca
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| Posted: Thu Mar 05, 2015 9:59 am Post subject: CJ-6 prop blade query |
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Hi Jay;
The type certificate data sheet for certificated aircraft has that info for each engine/propellor combination. Typically the tip repair limit is in the order of 2% of the DIA. I would not hesitate to do a reduction within that but I believe the CJ propellor repair manual does address that so I will check that today and get back.
Walt
From: Jay McIntyre (cjaviator(at)gmail.com)
Sent: Wednesday, March 04, 2015 11:12 PM
To: yak list (yak-list(at)matronics.com)
Subject: CJ-6 prop blade query
Hi all, We have a standard J9-G1 prop that a previous operator has blended the face of each blade at the tips and then filled with bog.
Understandably, my prop shop wants to take crop the blades to remove the severely thinned material but are unable to as the only information we have on the blades (from the PT-6 component overhaul manual states that radius of the prop shall be 1200mm. There is no allowance or mention of cropping limits.
Anyone out there operating a CJ with cropped blades? Do you have any info to support cropping the blades?
(We want to remove (at) 19mm from each blade)
Regards, Jay
New Zealand
[quote]
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
[b]
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wlannon(at)shaw.ca
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| Posted: Thu Mar 05, 2015 6:37 pm Post subject: CJ-6 prop blade query |
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Jay;
Checked the prop info today (same info you have). Should have read your post more carefully.
So best I can do is give you my opinion that 19 mm would be OK.
best;
Walt
From: Jay McIntyre (cjaviator(at)gmail.com)
Sent: Wednesday, March 04, 2015 11:12 PM
To: yak list (yak-list(at)matronics.com)
Subject: CJ-6 prop blade query
Hi all, We have a standard J9-G1 prop that a previous operator has blended the face of each blade at the tips and then filled with bog.
Understandably, my prop shop wants to take crop the blades to remove the severely thinned material but are unable to as the only information we have on the blades (from the PT-6 component overhaul manual states that radius of the prop shall be 1200mm. There is no allowance or mention of cropping limits.
Anyone out there operating a CJ with cropped blades? Do you have any info to support cropping the blades?
(We want to remove (at) 19mm from each blade)
Regards, Jay
New Zealand
[quote]
href="http://www.matronics.com/Navigator?Yak-List">http://www.matronics.com/Navigator?Yak-List
href="http://forums.matronics.com">http://forums.matronics.com
href="http://www.matronics.com/contribution">http://www.matronics.com/c
[b]
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