'F' drill and pre-built SR main spar

Jason Beall · Post by **Jason Beall** » Fri Feb 17, 2012 9:17 pm

Hi all,

Two questions:

1)With reference to the SR builder's manual, Chapter
SIX (wing), section ONE - main spar assembly,
instruction number 51...what is an "F" drill?

2)Also, any SR builder's out there purchase their main
spars pre-assembled? I bought mine factory built and
am studying chapter six trying to make sure I know
where to begin. I think I start with section 6.1,
number 48...but wanted to make sure there is nothing I
need to go back and do.

Thanks,

-Jason

=====
________________________________________________

Jason Beall
Super Rebel No. 131
Aberdeen, Scotland, UK
super_rebel131@yahoo.com

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LisaFly99 · Post by **LisaFly99** » Fri Feb 17, 2012 9:17 pm

In a message dated 9/28/01 5:14:06 AM Central Daylight Time, super_rebel131@yahoo.com writes:

...what is an "F" drill?

JASON
It's a size or diameter. Just like inch increments and number sizes there are letter sizes.
Phil&Lisa Smith #460R N414D

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David Ricker · Post by **David Ricker** » Fri Feb 17, 2012 9:17 pm

<!doctype html public "-//w3c//dtd html 4.0 transitional//en"> Jason
The drill size is .257" dia and is the regular size used as a tap drill if you want to thread a hole to 1/4"-20. There must be some arcane reason for it but English size drills come in number, fractional and letter sizes. There is a chart at http://www.wwforum.com/faqs_articles/DrillChart.html that has metric & English sizes up to 4"!!
Dave R.
LisaFly99@aol.com wrote:

In a message dated 9/28/01 5:14:06 AM Central Daylight Time, super_rebel131@yahoo.com writes:

...what is an "F" drill?

JASON
It's a size or diameter. Just like inch increments and number sizes there are letter sizes.
Phil&Lisa Smith #460R N414D

--
David A. Ricker P. Eng.
DARTEC Engineering Inc.
3 Tamarac Drive
Fall River, Nova Scotia
Canada, B2T 1E8
ricker@dbis.ns.ca
Ph. 902-860-0256

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Mike Kimball · Post by **Mike Kimball** » Fri Feb 17, 2012 9:17 pm

If I remember right, the hole that you are told to drill with an F drill
eventually gets drilled out larger later so I just used a 1/4 inch drill.
My wings are complete and I never bought any lettered drill bits.

Mike Kimball
SR#044

-----Original Message-----
From: murphy-rebel@dcsol.com [mailto:murphy-rebel@dcsol.com]On Behalf Of
Jason Beall
Sent: Friday, September 28, 2001 2:13 AM
To: murphy-rebel@dcsol.com
Subject: 'F' drill and pre-built SR main spar

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Hi all,

Two questions:

1)With reference to the SR builder's manual, Chapter
SIX (wing), section ONE - main spar assembly,
instruction number 51...what is an "F" drill?

2)Also, any SR builder's out there purchase their main
spars pre-assembled? I bought mine factory built and
am studying chapter six trying to make sure I know
where to begin. I think I start with section 6.1,
number 48...but wanted to make sure there is nothing I
need to go back and do.

Thanks,

-Jason

=====
________________________________________________

Jason Beall
Super Rebel No. 131
Aberdeen, Scotland, UK
super_rebel131@yahoo.com

__________________________________________________
Do You Yahoo!?
Listen to your Yahoo! Mail messages from any phone.
http://phone.yahoo.com
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