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Vent cutting

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amyvega2005(at)earthlink.
Guest

Posted: Tue Jun 12, 2007 4:45 am Post subject: Vent cutting

anyone recommend a certain fly cutter to punch the hole in the canopy for the 3 1/2 vents? I am sweating that procedure.

Juan



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rstone4(at)hot.rr.com
Guest

Posted: Tue Jun 12, 2007 6:33 am Post subject: Vent cutting

Juan,

     On plexiglass a fine tooth hole saw might be a better tool to use if 

you can find one with fine teeth that is the right size.  I have ordered two 

or I should say a pair of plastic vents from Aircraft Spruce that are 

designed to go on the side of the canopy that will direct cool air to the 

upper areas of the cockpit and I plan to use a hole saw to cut the required 

hole in the canopy side.  I will post the results with pictures on this 

forum when the job is done.



Tracy Stone

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p.mulwitz(at)worldnet.att
Guest

Posted: Tue Jun 12, 2007 6:51 am Post subject: Vent cutting

Hi Juan,



If it is similar to drilling through plexiglass I would recommend 

using a hole saw and running it backwards.  That way you burn through 

the plastic and won't make cracks.  Before using the saw, drill a 

hole for the center using standard plastic drill or other zero rake 

drill bit.  If necessary, run it backwards too.



Paul

XL fuselage



At 05:44 AM 6/12/2007, you wrote:

 	  Quote: 	
		  



anyone recommend a certain fly cutter to punch the hole in the 

canopy for the 3 1/2 vents? I am sweating that procedure.

Juan

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amyvega2005(at)earthlink.
Guest

Posted: Tue Jun 12, 2007 10:40 am Post subject: Vent cutting

got it run it backwards, thanx.



juan



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amyvega2005(at)earthlink.
Guest

Posted: Tue Jun 12, 2007 10:41 am Post subject: Vent cutting

that would be great. thanx



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rstone4(at)hot.rr.com
Guest

Posted: Tue Jun 12, 2007 3:31 pm Post subject: Vent cutting

Well guys I ran into a litle trouble.  When I used a hole saw or a fly 

cutter on a piece of scrap plexiglass I found the center hole starts to 

elongate and this causes the cutting edge of either tool to wander.  I saw a 

post where one member/builder used a flycutter and turned it by hand.  I 

will try this method next and report to the group as to how the cut turned 

out.  I have a feeling that the hand turning will work out.  Since my dad, 

Bob is retired, he will do the work since he has a lot more time than I do.



Tracy Stone



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rickpitcher

Joined: 27 Feb 2007
Posts: 76

Posted: Tue Jun 12, 2007 3:49 pm Post subject: Vent cutting

If the problem is caused by the flutes of the pilot drill shaving the sides 

of the pilot hole you migh try  replacing the pilot drill with a 1/4" bolt.

Loosen the allen screw in the holesaw or flycutter and remove the drill bit. 

Replace the drill bit with a 1/4" bolt.

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grs-pms(at)comcast.net
Guest

Posted: Tue Jun 12, 2007 3:58 pm Post subject: Vent cutting

When using a hole saw or fly cutter on plexiglass,  try replacing the drill bit in the center with a piece of drill rod of the same  diameter.  That should keep the center hole from elongating if you keep the  drill speed slow.

  

 George

   [quote][b]

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