Today's Message Index:
----------------------
1. 04:03 PM - duplicating holes (Carlos Sa)
2. 04:18 PM - Re: duplicating holes (Paul Mulwitz)
3. 06:52 PM - Re: duplicating holes (Larry McFarland)
Message 1
| INDEX | Back to Main INDEX |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | duplicating holes |
Hello, folks
I am looking for some guidance on the process to duplicate rivet holes.
I need to replace the leading edge skin (CH601-HD).
The old skin has already been removed from one wing (surprisingly easy) and
the curved part cut, so I can use the flat parts as templates.
The new skin already has four holes to get it positioned over the old skin.
Now I would appreciate some guidance from those that have done this (copy
holes) before.
I have have hole duplicators from Spruce (similar to this type
http://www.aircraftspruce.ca/catalog/topages/strapDuplicator.php ), but I
am thinking the inverted type (
http://www.aircraftspruce.ca/catalog/topages/strapDuplicatorPunch.php )
might help achieving more precision, as the old and new skins remain in
close contact, and there is no deformation required to insert the tool in
between.
Any guidance on the process and / or tools would be greatly appreciated. It
took me a lot of time to polish these skins, and I'd hate (understatement!)
to see them go to waste because one hole is a fraction of an inch off.
Thanks in advance for your comments / suggestions.
Carlos Sa
CH601-HD, plans
Message 2
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | Re: duplicating holes |
Hi Carlos,
I learned a great trick from a retired airline mechanic (who has his
plane in the hangar next to mine).
Get some clear plastic sheet (it doesn't matter what kind of plastic so
long as you can see through it - acrylic/polycarbonate are fine). Cut a
strip that covers a portion of your holes. Drill a hole or two to
attach it to the under layer of metal with clecos. Then use your drill
to drill holes through the plastic that match the holes in the metal.
Now you have a perfect template for the holes you want to match with the
upper piece of metal.
Place your template under the new sheet of metal and attach with a
couple of clecos. Then you can drill the remaining holes using the
template holes to locate the new metal holes. When you are all done you
will have a perfectly drilled set of holes in the new metal. In this
case you don't need pilot holes - just drill them in the plastic and the
new metal to the final size.
If you do this before removing the old piece of sheet metal you can mark
the offset from the edge to the holes. Since you have already removed
the metal you will have to measure this.
Have fun,
Paul
Camas, WA
XL in flight test.
On 3/16/2012 4:02 PM, Carlos Sa wrote:
> Hello, folks
>
>
> I am looking for some guidance on the process to duplicate rivet holes.
> I need to replace the leading edge skin (CH601-HD).
> The old skin has already been removed from one wing (surprisingly
> easy) and the curved part cut, so I can use the flat parts as templates.
> The new skin already has four holes to get it positioned over the old
> skin.
> Now I would appreciate some guidance from those that have done this
> (copy holes) before.
>
> I have have hole duplicators from Spruce (similar to this type
> http://www.aircraftspruce.ca/catalog/topages/strapDuplicator.php ),
> but I am thinking the inverted type (
> http://www.aircraftspruce.ca/catalog/topages/strapDuplicatorPunch.php
> ) might help achieving more precision, as the old and new skins remain
> in close contact, and there is no deformation required to insert the
> tool in between.
>
> Any guidance on the process and / or tools would be greatly
> appreciated.It took me a lot of time to polish these skins, and I'd
> hate (understatement!) to see them go to waste because one hole is a
> fraction of an inch off.
>
> Thanks in advance for your comments / suggestions.
>
> Carlos Sa
> CH601-HD, plans
> *
>
>
> *
Message 3
| INDEX | Back to Main INDEX |
| PREVIOUS | Skip to PREVIOUS Message |
| NEXT | Skip to NEXT Message |
| LIST | Reply to LIST Regarding this Message |
| SENDER | Reply to SENDER Regarding this Message |
|
| Subject: | duplicating holes |
Hi Carlos,
You can rivet two pieces of steel strapping together at one end to align the
straps (3 rivets). On the opposite end, you drill the rivet diameter you
need to get alignment of a single hole.
On the bottom strap, you put a rivet thru so the blind end extends below the
strap. Then, when you slip the lower strap with rivet below the sheet,
placing the rivet nub in the structure hole and then ink mark the
replacement sheet thru the hole in the upper strap. To get the alignment
rivet sized to the rivet you need, pull the rivet in the strap and into a
thick drilled flat so the diameter
is held closer to the diameter needed. Then use a punch to knock the rivet
out of the thick flat so the rivet protrudes well for alignment. I did this
on my main wing skins when the structure was drilled and I decided to change
from .016 to .020.
and it worked well.
Larry McFarland 601HDS at www.macsmachine.com
From: owner-zenith-list-server@matronics.com
[mailto:owner-zenith-list-server@matronics.com] On Behalf Of Carlos Sa
Sent: Friday, March 16, 2012 6:02 PM
Subject: Zenith-List: duplicating holes
Hello, folks
I am looking for some guidance on the process to duplicate rivet holes.
I need to replace the leading edge skin (CH601-HD).
The old skin has already been removed from one wing (surprisingly easy) and
the curved part cut, so I can use the flat parts as templates.
The new skin already has four holes to get it positioned over the old skin.
Now I would appreciate some guidance from those that have done this (copy
holes) before.
I have have hole duplicators from Spruce (similar to this type
http://www.aircraftspruce.ca/catalog/topages/strapDuplicator.php ), but I am
thinking the inverted type (
http://www.aircraftspruce.ca/catalog/topages/strapDuplicatorPunch.php )
might help achieving more precision, as the old and new skins remain in
close contact, and there is no deformation required to insert the tool in
between.
Any guidance on the process and / or tools would be greatly appreciated. It
took me a lot of time to polish these skins, and I'd hate (understatement!)
to see them go to waste because one hole is a fraction of an inch off.
Thanks in advance for your comments / suggestions.
Carlos Sa
CH601-HD, plans
Other Matronics Email List Services
These Email List Services are sponsored solely by Matronics and through the generous Contributions of its members.
-- Please support this service by making your Contribution today! --
|