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12-28-2013, 06:04 PM
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Join Date: Jan 2008
Location: MERRITT ISLAND, FL
Posts: 360
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The data source is.....
Quote:
Originally Posted by Bob Kuykendall
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.
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Bob,
I'd like to run those failures to ground. Where did you find the data regarding the failures?
thanks,
Don
__________________
Don Stiver
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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12-29-2013, 05:03 AM
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Join Date: Jan 2008
Location: MERRITT ISLAND, FL
Posts: 360
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Tallyho
Quote:
Originally Posted by Bob Kuykendall
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Thanks Bob and also for the good work you and Steve performed.
Don
__________________
Don Stiver
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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02-19-2016, 04:28 PM
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Join Date: Jan 2005
Location: Ottawa, Canada
Posts: 2,357
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I'm thinking of switching to NAS1804-6 nuts. What socket fits these nuts?
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02-19-2016, 04:56 PM
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Join Date: Dec 2004
Location: Gold Hill, NC25
Posts: 2,400
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Quote:
Originally Posted by Kevin Horton
I'm thinking of switching to NAS1804-6 nuts. What socket fits these nuts?
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I think the stock nut is 9/16 and the nas was 1/2 12pt.
Someone correct me.
__________________
Kahuna
6A, S8 ,
Gold Hill, NC25
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02-19-2016, 05:39 PM
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Join Date: Jan 2005
Location: Ottawa, Canada
Posts: 2,357
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Quote:
Originally Posted by Kahuna
I think the stock nut is 9/16 and the nas was 1/2 12pt.
Someone correct me.
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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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02-19-2016, 05:46 PM
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Join Date: Jul 2009
Location: Lee's Summit, MO
Posts: 747
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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.
__________________
Robert Williams
Lee's Summit, MO
RV-8 - Empennage & Wings Done
Working on Fuse
O-360-A1A
1946 Cessna 120
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02-19-2016, 05:57 PM
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Join Date: Feb 2010
Location: GTA, Ontario
Posts: 826
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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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02-19-2016, 06:13 PM
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Join Date: Dec 2014
Location: hilltop lakes' Texas
Posts: 135
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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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02-19-2016, 06:39 PM
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Join Date: Jan 2008
Location: Ashland, OR
Posts: 2,574
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Quote:
Originally Posted by Kevin Horton
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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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.
__________________
Steve Smith
Aeronautical Engineer
RV-8 N825RV
IO-360 A1A
WW 200RV
"The Magic Carpet"
Hobbs 625
LS6-15/18W sailplane SOLD
bought my old LS6-A back!! 
VAF donation Jan 2020
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