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dlm46007(at)cox.net
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 Posted: Thu Apr 09, 2009 10:04 am Post subject: Hardware heads up |
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Just completing the first annual inspection and glad I used some Ace or McMaster Carr or Aircraft Spruce aviation hardware. I have enclosed a picture to illustrate the four substitutions.
The aluminum fairing under the horizontal stabilizer. The plans call for counter sinking a #6 screw into the longeron. Then the longeron is tapped.. by the time the CS is complete there are few threads in the longeron for the fastener to grip. we decided to use stainless button heads with an internal hex head. Without the countersink there are more threads to grip.
Where practical internally we used NAS hardware that had a hex external head with a Phillips internal pattern. there are two ways to remove the screw before resorting to drilling and Easy Out tool.
On the tunnel the three forward screws on each side are CS stainless with an internal hex head rather than the Phillips head. When you are flat on your back trying to remove/insert the forward screws it is much easier to use an Allen wrench than applying pressure to a Phillips head to prevent slipping of the screw driver point.
On the panel we used stainless cap screws where the cap and internal hex head allow two means of removal..
As you can probably tell I have done a few annuals and had to remove screws in inspection plates where the previous mechanic used a Makita with max torque setting
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carl.froehlich(at)cox.net
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| Posted: Thu Apr 09, 2009 3:24 pm Post subject: Hardware heads up |
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I didn’t like the stock set up of threading holes in the longeron for screws (aluminum threads, steel screw). I put nutplates in each of these locations – keeping the countersunk screw with a tinnerman on the fiberglass.
Carl Froehlich
RV-8A (450 hrs)
RV-10 (fuselage)
From: owner-rv10-list-server(at)matronics.com [mailto:owner-rv10-list-server(at)matronics.com] On Behalf Of David McNeill
Sent: Thursday, April 09, 2009 2:02 PM
To: rv10-list(at)matronics.com
Subject: Hardware heads up
Just completing the first annual inspection and glad I used some Ace or McMaster Carr or Aircraft Spruce aviation hardware. I have enclosed a picture to illustrate the four substitutions.
The aluminum fairing under the horizontal stabilizer. The plans call for counter sinking a #6 screw into the longeron. Then the longeron is tapped.. by the time the CS is complete there are few threads in the longeron for the fastener to grip. we decided to use stainless button heads with an internal hex head. Without the countersink there are more threads to grip.
Where practical internally we used NAS hardware that had a hex external head with a Phillips internal pattern. there are two ways to remove the screw before resorting to drilling and Easy Out tool.
On the tunnel the three forward screws on each side are CS stainless with an internal hex head rather than the Phillips head. When you are flat on your back trying to remove/insert the forward screws it is much easier to use an Allen wrench than applying pressure to a Phillips head to prevent slipping of the screw driver point.
On the panel we used stainless cap screws where the cap and internal hex head allow two means of removal..
As you can probably tell I have done a few annuals and had to remove screws in inspection plates where the previous mechanic used a Makita with max torque setting
[quote][b]
| | - The Matronics RV10-List Email Forum - | | | Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:
http://www.matronics.com/Navigator?RV10-List |
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