CONTROL HORNS Drill

[Larry Caldwell]

Verne,

Yes, I've had good luck with them on balsa.  Just keep the pressure
applied pretty light and you get a nice clean hole.

Larry

Verne Koester wrote:
> Larry,
> Are you talking about using a Forstner bit on balsa?
> 
> Verne
> 
> 
> ----- Original Message -----
> From: "Larry Caldwell" <larryc at bscn.com>
> To: <discussion at nsrca.org>
> Sent: Saturday, September 06, 2003 12:42 PM
> Subject: Re: CONTROL HORNS Drill
> 
> 
> 
>>A Fostner bit works well too, and cuts a hole with cleaner edges than
>>does a hole saw.  You still need something behind the wood you are
>>drilling.  I got mine from Lowes.
>>
>>Larru
>>
>>ronlock at comcast.net wrote:
>>
>>>One more alternative -
>>>You can drill holes for dowels with a hole saw.
>>>It still takes a wood backing and maybe the masking
>>>tape as well on the back side of the drilled hole.
>>>Personally, I use 5/8 inch dowels in lieu of 1/2.
>>>
>>>Ron Lockhart
>>>
>>>
>>>>Sorry....typing more than thinking ;-)
>>>>
>>>>I put a piece of masking tape on the outside of the sheeting of the
> 
> surface
> 
>>>>being bored.  If it's relatively sawdust-free, and good tape, it will
> 
> hold
> 
>>>>the fibers together as the brass tube cuts through.
>>>>   I drill mine in the drill press, using the shucks on the press
> 
> table,
> 
>>>>drilling from the upper surface to the lower, so the tape is on the
> 
> lower
> 
>>>>surface, and against the shuck.
>>>>   Holding moderate pressure to the surface/shuck, the drill press with
> 
> the
> 
>>>>tube will go through it like butter, with only light pressure needed.
>>>>   Using this technique, one can do both ailerons, both elevators, and
> 
> the
> 
>>>>rudder in about 5 minutes, if being slow.
>>>>   Hardwood dowels are coated with thin epoxy, inserted flush with the
>>>>sheeting.  If you're cautious, and pre-measure and sand the angles,
> 
> these
> 
>>>>can be very cleanly glued in place.
>>>>   After they're cured, drill centers in the same shucks for the 6-32
> 
> bolt.
> 
>>>>   Works just dandy.
>>>>
>>>>Bob Pastorello, Oklahoma
>>>>NSRCA 199, AMA 46373
>>>>rcaerobob at cox.net
>>>>www.rcaerobats.net
>>>>
>>>>
>>>>----- Original Message -----
>>>>From: "Martin X. Moleski, SJ" <moleski at canisius.edu>
>>>>To: <discussion at nsrca.org>
>>>>Sent: Wednesday, September 03, 2003 7:58 PM
>>>>Subject: Re: CONTROL HORNS
>>>>
>>>>
>>>>
>>>>
>>>>>--On Wednesday, September 03, 2003 5:43 PM -0500 Bob Pastorello
>>>>
>>>><rcaerobob at cox.net> wrote:
>>>>
>>>>
>>>>>>Masking tape on the back side of the tubing drill prevents the
> 
> tear-out.
> 
>>>>>Bob, with a round tube, I'm having trouble picturing the "back side."
>>>>>
>>>>>Do you just mean to wrap masking tape around the tube near the cutting
>>>>>edge?  A depth stop?  Masking tape on the back side of the balsa being
>>>>>cut?
>>>>>
>>>>>Thanks for clarifying.
>>>>>
>>>>>Marty #2874
>>>>>=====================================
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>>>>>
>>>>
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>>>
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>>>
>>>.
>>>
>>
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