Mailing List flyrotary@lancaironline.net Message #42035
From: Charlie England <ceengland@bellsouth.net>
Subject: Re: [FlyRotary] Porting
Date: Sat, 22 Mar 2008 20:51:01 -0500
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Ernest Christley wrote:
Porting an engine with a drill will destroy it.

Plain and simple.  No ifs, ands or buts.  I have a die grinder, but nothing more than a pancake compressor so actually using it is painful.  I could buy a larger compressor, but then I have to find someplace to store it.  Having everything else I need to start the porting process, I improvised.  Chucked the parabolic bit into my drill and had at it.

4 hours, and only one oopsie, later, I had a nicely ported intake, and a drill with a chuck that wobbles like a drunken sailor.  I'm talking at least 1/2" of play at the tip of the chuck.  Fortunately, these drills are cheap at Northern Tool.  I can get them for $15 when they're on sale.  The extra handle gives you a lot to hold onto as you're grinding away; hence, the single oopsie.  You hate for tools to be considered disposable, but in this case it worked out really well.

http://ernest.isa-geek.org/Delta/Pictures/ EnginePortingTemplate.jpg
http://ernest.isa-geek.org/Delta/Pictures/EnginePortingIntermediateHousingRear.jpg  http://ernest.isa-geek.org/Delta/Pictures/EnginePortingRearHousing.jpg
http://ernest.isa-geek.org/Delta/Pictures/EnginePortingIntermediateHousingFront.jpg  http://ernest.isa-geek.org/Delta/Pictures/EnginePortingRearHousing2.jpg        http://ernest.isa-geek.org/Delta/Pictures/EnginePortingFrontHousingOopsie.jpg <http://ernest.isa-geek.org/Delta/Pictures/EnginePortingFrontHousingOopsie.jpg> -- Homepage:  http://www.flyrotary.com/
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You've discovered the reason you can buy them for $15. :-)  I buy a lot of stuff from Harbor Freight (a lot like NT), but I haven't had much luck with their power tools.

I've tried to get familiar with where all the 'well stocked' pawn shops are located in the areas where I typically drive. If I have time, I stop in & look over their tool selections periodically.  Around here, I'll see the putrid green $25 B&D homeowner grade drills priced at $35 & right beside them, B&D 'HolGun' series (~$175 retail) for ...$35. Same story for industrial grade Skill & Milwaukee tools. The only way you'll wear out one of these industrial grade drills is to pour grinding compound into the bearings.

For one-time work like you're doing, HF sells an electric tool with a 1/4" collet for about $20 when it's on sale. It's intended to be a laminate trimmer, but you can remove the 'foot' & it will function like a high speed air grinder.

http://www.harborfreight.com/cpi/ctaf/displayitem.taf?Itemnumber=44914

Now, how do I get my freshly installed Puppy Linux computer to automatically recognize shared folders on my Windoze computer attached to the same network?

Charlie


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