X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from [66.219.56.245] (HELO mail.qnsi.net) by logan.com (CommuniGate Pro SMTP 6.0c1) with ESMTP id 5728536 for flyrotary@lancaironline.net; Sat, 25 Aug 2012 09:12:02 -0400 Received-SPF: none receiver=logan.com; client-ip=66.219.56.245; envelope-from=bhughes@qnsi.net Received: from 10.0.0.5 ([10.0.0.5]) by qnsi-mail.qnsi.net ([10.0.0.5]) with Microsoft Exchange Server HTTP-DAV ; Sat, 25 Aug 2012 13:11:26 +0000 Subject: Re: [FlyRotary] Water Injection: [FlyRotary]Turboquestion. References: From: "Bobby J. Hughes" Content-Type: multipart/alternative; boundary="Apple-Mail-34F68064-1768-4D73-96A4-50C13AB63B54"; charset="iso-8859-1" In-Reply-To: Message-ID: <52082205-6588-4E27-AC47-950D7FB57753@qnsi.net> Date: Sat, 25 Aug 2012 08:11:26 -0500 To: "Rotary motors in aircraft" Content-Transfer-Encoding: 7bit thread-topic: [FlyRotary] Water Injection: [FlyRotary]Turboquestion. thread-index: Ac2CwyIeYMzmLW7+Svidzn6i+rxS6Q== MIME-Version: 1.0 (1.0) --Apple-Mail-34F68064-1768-4D73-96A4-50C13AB63B54 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=us-ascii So that's why you went plugs up! Bobby Sent from my iPad On Aug 25, 2012, at 6:52 AM, "Ed Anderson" wrote= : > Back in 1976 when I build probably one of the first turbocharged Honda Ci= vics with a 1200cc engine east of the Mississippi - I used water injection f= rom a windshield wiper bag and it worked fine - once I got it working. > =20 > While installing the water injection "system", unbeknownst to me, water ha= d dribbled out of the water tube injection end down into the intake manifol= d. The car was on a stand which had a slight slope to the left.=20 > =20 > In any case, after getting everything installed I couldn't wait to test it= out. I got into the car and fire up the engine - there was an immediate "b= ump" following by a pining sound coming from the engine. The pining sound c= learly was in sync with the cars rpm. I killed the engine and got out to i= nvestigate. > =20 > I check the compression on all four cylinders and found the down slope cy= linder to be lower that the rest. I dropped the oil pan to view the engine a= nd remember thinking how ingenious the Japanese engineers were to put a curv= e into the connecting rod to get the best thrust angle. Then the light bulb= came on as I noticed the other three connecting rods were straight.=20 > =20 > I had re-confirmed the scientific fact that water as a liquid is essential= ly incompressible - water had leaked into the cylinder and when I fired the e= ngine the piston tried to compress it. The forces sheared the compressing r= ing land off the aluminum piston destroying the piston and had forced the co= nnection rod to curve to such an extend that the curved part was now slappin= g on the bottom of the cylinder opening each time the crankshaft went around= . > =20 > Fortunately I had not tried to drive the car or I almost certainly would h= ave cause the rod to break and destroyed the engine; > Probably not as likely with a rotary engine, but I think I would check ver= y carefully any water injection design and installation. > =20 > Ed >=20 > Edward L. Anderson > Anderson Electronic Enterprises LLC > 305 Reefton Road > Weddington, NC 28104 > http://www.andersonee.com > http://www.eicommander.com --Apple-Mail-34F68064-1768-4D73-96A4-50C13AB63B54 Content-Transfer-Encoding: 7bit Content-Type: text/html; charset=utf-8

So that's why you went plugs up!

Bobby

Sent from my iPad

On Aug 25, 2012, at 6:52 AM, "Ed Anderson" <eanderson@carolina.rr.com> wrote:

Back in 1976 when I build probably one of the first turbocharged Honda Civics with a 1200cc engine east of the Mississippi - I used water injection from a windshield wiper bag and it worked fine - once I got it working.

While installing the water injection "system", unbeknownst to me, water had dribbled out of the water tube injection end down into the intake manifold. The car was on a stand which had a slight slope to the left.

In any case, after getting everything installed I couldn't wait to test it out. I got into the car and fire up the engine - there was an immediate "bump" following by a pining sound coming from the engine. The pining sound clearly was in sync with the cars rpm. I killed the engine and got out to investigate.

I check the compression on all four cylinders and found the down slope cylinder to be lower that the rest. I dropped the oil pan to view the engine and remember thinking how ingenious the Japanese engineers were to put a curve into the connecting rod to get the best thrust angle. Then the light bulb came on as I noticed the other three connecting rods were straight.

I had re-confirmed the scientific fact that water as a liquid is essentially incompressible - water had leaked into the cylinder and when I fired the engine the piston tried to compress it. The forces sheared the compressing ring land off the aluminum piston destroying the piston and had forced the connection rod to curve to such an extend that the curved part was now slapping on the bottom of the cylinder opening each time the crankshaft went around.

Fortunately I had not tried to drive the car or I almost certainly would have cause the rod to break and destroyed the engine;

Probably not as likely with a rotary engine, but I think I would check very carefully any water injection design and installation.

Ed

Edward L. Anderson
Anderson Electronic Enterprises LLC
305 Reefton Road
Weddington, NC 28104
http://www.andersonee.com
http://www.eicommander.com

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