X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from ccerelbas02.cce.hp.com ([161.114.21.105] verified) by logan.com (CommuniGate Pro SMTP 5.1.1) with ESMTPS id 1503446 for flyrotary@lancaironline.net; Wed, 25 Oct 2006 10:51:19 -0400 Received-SPF: none receiver=logan.com; client-ip=161.114.21.105; envelope-from=dale.r@cox.net Received: from mailrelay01.cce.cpqcorp.net (relay.cpqcorp.net [16.47.68.171]) by ccerelbas02.cce.hp.com (Postfix) with ESMTP id 9128134164 for ; Wed, 25 Oct 2006 09:50:48 -0500 (CDT) Received: from [16.83.197.160] (unknown [16.83.197.160]) by mailrelay01.cce.cpqcorp.net (Postfix) with ESMTP id D625711C0E for ; Wed, 25 Oct 2006 09:50:42 -0500 (CDT) Message-ID: <453F79BD.8030502@cox.net> Date: Wed, 25 Oct 2006 07:50:37 -0700 From: Dale Rogers Reply-To: dale.r@cox.net User-Agent: Thunderbird 1.5.0.7 (Windows/20060909) MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Rotary Roundup References: In-Reply-To: Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Hi All,

   This sounds like a "what I learned from that" moment. 

   Good practice for holes that need to be fluid tight is to drill
or bore the hole slightly undersize and then finish the cut with a
reamer.  Reamers come sized in thousandths of an inch, so it's not
usually much of a problem to get exactly the correct size. 
Moreover, a reamed hole is going to be truly cylindrical, something
you can't count on when honing or polishing a drilled hole.

   A chucking reamer - suitable for use in a drill press - will
run about $20 from suppliers like Rutland and ENCO, sometimes
considerably less, depending on the size and what's "on sale" at
the moment.

Good Building,
Dale R.


Stephen Brooks wrote:
It appears that I won't be able to attend this years round up, htough I was hoping that I would have time to get there.
 
I came to SC yesterday, intending to finally take my plane to NC.  I've only flown it once in that last 4 months, so I pulled the cowling, checked things out, and started the engine.
 
After a couple of minutes run time, I shut it down, and checked everything out.  I found that I now have a fuel leak from one of the injectors, at the fuel rail.  Apparently I have an o ring that is not leaking.  I've ordered a new set of seals from Mazatrix, and I'm going to go back to the airport today, and remove the fuel rail so that I can take it back home with me. 
 
When I drilled the fuel rail for the injectors, the holes are not perfectly smooth.  I think that the roughness of the bore probably led to the o ring failure.  I'm going to polish the bore, without hopefully enlarging it any.  I think that I'm going to use a dremel with a fine stone on it.
 
This weekend I also have to help our yougest dughter and son-in-law frame up a new house they are building.
 
I hope that everyone has a great time at the roundup, and I hope to make it next year.
 
Steve Brooks
Cozy MKIV N75CZ
Turbo Rotary 13B