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  #51  
Old 12-28-2013, 06:04 PM
APACHE 56 APACHE 56 is offline
 
Join Date: Jan 2008
Location: MERRITT ISLAND, FL
Posts: 360
Default The data source is.....

Quote:
Originally Posted by Bob Kuykendall View Post
Dave,


The service history of the RV-8 landing gear includes several incidents in which the nuts securing the saddles at the outboard landing gear attachments failed in tension.

Thanks, Bob K.
Bob,
I'd like to run those failures to ground. Where did you find the data regarding the failures?
thanks,
Don
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RV8 "Little Pill" N6371S, Merritt Island, Fl.
BPE IO-390, Dual P-mag, MT 3-blade, AFP system
Steen Skybolt: Sold
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  #52  
Old 12-28-2013, 08:18 PM
Bob Kuykendall's Avatar
Bob Kuykendall Bob Kuykendall is offline
 
Join Date: Sep 2006
Location: Douglas Flat, CA
Posts: 589
Default

Quote:
Originally Posted by APACHE 56 View Post
Bob,
I'd like to run those failures to ground. Where did you find the data regarding the failures?
thanks,
Don
Don, all of the failures I know of were reported here on VAF. You would have to search on a variety of keywords to find them all.

Here are a couple of leads to get you started:

http://www.vansairforce.com/communit...d.php?p=163234

http://www.vansairforce.com/communit...ad.php?t=43599

http://www.vansairforce.com/communit...ad.php?t=84572

Thanks, Bob K.
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HP-24 kit sailplane
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  #53  
Old 12-29-2013, 05:03 AM
APACHE 56 APACHE 56 is offline
 
Join Date: Jan 2008
Location: MERRITT ISLAND, FL
Posts: 360
Default Tallyho

Quote:
Originally Posted by Bob Kuykendall View Post
Don, all of the failures I know of were reported here on VAF. You would have to search on a variety of keywords to find them all.

Here are a couple of leads to get you started:

http://www.vansairforce.com/communit...d.php?p=163234

http://www.vansairforce.com/communit...ad.php?t=43599

http://www.vansairforce.com/communit...ad.php?t=84572

Thanks, Bob K.

Thanks Bob and also for the good work you and Steve performed.
Don
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RV8 "Little Pill" N6371S, Merritt Island, Fl.
BPE IO-390, Dual P-mag, MT 3-blade, AFP system
Steen Skybolt: Sold
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  #54  
Old 02-19-2016, 04:28 PM
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Kevin Horton Kevin Horton is offline
 
Join Date: Jan 2005
Location: Ottawa, Canada
Posts: 2,357
Default

I'm thinking of switching to NAS1804-6 nuts. What socket fits these nuts?
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RV-8
Moses Lake, WA, USA
http://www.kilohotel.com/rv8/
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  #55  
Old 02-19-2016, 04:56 PM
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Kahuna Kahuna is offline
 
Join Date: Dec 2004
Location: Gold Hill, NC25
Posts: 2,400
Default

Quote:
Originally Posted by Kevin Horton View Post
I'm thinking of switching to NAS1804-6 nuts. What socket fits these nuts?
I think the stock nut is 9/16 and the nas was 1/2 12pt.
Someone correct me.
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  #56  
Old 02-19-2016, 05:39 PM
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Kevin Horton Kevin Horton is offline
 
Join Date: Jan 2005
Location: Ottawa, Canada
Posts: 2,357
Default

Quote:
Originally Posted by Kahuna View Post
I think the stock nut is 9/16 and the nas was 1/2 12pt.
Someone correct me.
Please confirm I can just use a common 12 pt socket. I feared that I might need some special, hard to find, expensive socket.
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  #57  
Old 02-19-2016, 05:46 PM
DaAV8R DaAV8R is offline
 
Join Date: Jul 2009
Location: Lee's Summit, MO
Posts: 747
Default Bolt length

My question is whether we can use the same bolt. I think the NAS nut is a taller nut. I'm thinking we won't get the full thread pas the nut and might need longer bolts. Not sure.
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Lee's Summit, MO
RV-8 - Empennage & Wings Done
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O-360-A1A

1946 Cessna 120
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  #58  
Old 02-19-2016, 05:57 PM
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Don Patrick Don Patrick is offline
 
Join Date: Feb 2010
Location: GTA, Ontario
Posts: 826
Default Here's what I got for my grove gear

I spoke with Tom Brink on what was best for my grove gear.

Here is what I got.

MS21250-06036
12 Point Bolt 180 KSI Minimum EA (1) 55.20
3/8 Diameter 12 Point Head
Condition : Factory New


MS21299-6
Cad II Plated High Strength 5 (5) 2.70
Flat Washer Good to 260 KSI
Condition : Factory New


MS21299C6
Cad II Plated High Strength 5 EA (5) 3.20
Center is Counter Bored
Washer Strength up to 260 Ksi
Condition : Factory New


NAS1804-6
12 Point Nut, 180Ksi.450 deg, pkg/5 (5) 27.50
3/8-24
Condition : Factory New

Genuine Aircraft Hardware Co
gahco@gen-aircraft-hardware.com

At the time, it was just under $90 for everything i needed.

No special tools needed.


Don
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  #59  
Old 02-19-2016, 06:13 PM
8 ball 8 ball is offline
 
Join Date: Dec 2014
Location: hilltop lakes' Texas
Posts: 135
Default I test the entire landing gear quite often. So far I have not been able to destroy an

If I can't hurt it is adequate!
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  #60  
Old 02-19-2016, 06:39 PM
scsmith scsmith is offline
 
Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,574
Default

Quote:
Originally Posted by Kevin Horton View Post
Please confirm I can just use a common 12 pt socket. I feared that I might need some special, hard to find, expensive socket.
Hi Kevin,

Yes, a standard 12-pt socket works. Im not positive, but pretty sure Kahuna is right, it is one size smaller than the original nuts, so I think 1/2" is right.

If you are worried about getting a thread engagement on the nut that includes a thread or two outside the nut, then I think you might need to order a slightly longer bolt. I don't remember for sure. Recall that the NAS close tolerance bolts are spec'ed by grip length, not overall length. So it may be that there is adequate thread for the stronger nuts. I'm sorry I just don't remember exactly.

For sure the Grove gear gets longer bolts, because the gear leg is thicker. I'm pretty sure Grove has worked this out and supplies the proper length, as well as the high-strength nuts.
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Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
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Hobbs 625
LS6-15/18W sailplane SOLD
bought my old LS6-A back!!
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