X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from col0-omc2-s2.col0.hotmail.com ([65.55.34.76] verified) by logan.com (CommuniGate Pro SMTP 5.3.8) with ESMTP id 4365095 for flyrotary@lancaironline.net; Mon, 21 Jun 2010 12:53:27 -0400 Received-SPF: pass receiver=logan.com; client-ip=65.55.34.76; envelope-from=momsblacksheep@msn.com Received: from COL109-W15 ([65.55.34.72]) by col0-omc2-s2.col0.hotmail.com with Microsoft SMTPSVC(6.0.3790.4675); Mon, 21 Jun 2010 09:52:53 -0700 Message-ID: Return-Path: momsblacksheep@msn.com Content-Type: multipart/alternative; boundary="_a0493419-5fc3-48b2-bf24-68784b2d3187_" X-Originating-IP: [76.93.99.35] From: Steve Parkins To: flyrotary Subject: RE: [FlyRotary] Re: 13B rotary engines Date: Mon, 21 Jun 2010 09:52:52 -0700 Importance: Normal In-Reply-To: References: MIME-Version: 1.0 X-OriginalArrivalTime: 21 Jun 2010 16:52:53.0089 (UTC) FILETIME=[30A6B510:01CB1162] --_a0493419-5fc3-48b2-bf24-68784b2d3187_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable lynn=2C my 20b is for sale with intake and coolers 2=2C500.00 could you pass it along thx steve parkins =20 To: flyrotary@lancaironline.net Date: Mon=2C 21 Jun 2010 12:14:46 -0400 From: lehanover@gmail.com Subject: [FlyRotary] Re: 13B rotary engines In a message dated 6/21/2010 11:03:01 A.M. Eastern Standard Time=2C rv-4mik= e@cox.net writes: Thanks for the feedback Lynn. Unusual to see a "poor port design" actually = aid performance. =20 Mike Wills =20 It is not obvious until you start graphing the open and close events=2C but= the side port which uses the side of the rotor as a shutter to open and cl= ose the port=2C offers Mazda great latitude in port timing. In the periphe= ry ported engine (both ports) it is impossible to arrive at zero overlap=2C= and have an engine that will produce any power at all. The apex seal does = not close off either port at all=2C it just valves gasses in one direction = or another.=20 =20 In addition=2C the overlap of the periphery ported engine is far more effec= tive flow wise than overlap in the side ported engine. One apex seal is abo= ve the intake port when the opposing apex seal is below the exhaust port. F= low between the two is unobstructed. =20 So=2C at low RPM you get fresh mixture leaving through the exhaust port=2C = and combinations of burned and unburned fuel and exhaust gasses flowing par= tway back into the intake runners. =20 This reduces the low RPM output to the point that the engine seems quit doc= ile=2C and is easy to drive around in the car=2C slowly=2C or possibly taxi= in an aircraft. This would make off idle tuning data useless as there wil= l be fuel burning right on top of the EGT probes=2C and unburned fuel reach= ing the F/A sensor. =20 =20 The engine will act along the lines of a piston engine with a long duration= cam. When the engine reaches its happy RPM where all of the mixture is bur= ning inside the engine=2C it will step up on the "CAM" and you will see wha= t a good idea this was. Use slow throttle inputs until you find the "WOW" R= PM=2C and be ready with all available rudder.=20 =20 When we first ran a factory periphery port engine=2C we found that there we= re places on the track that would not allow full throttle. This with 11" wi= de slicks. Thank Heaven for rev limiters. The driver reported the rear end = getting real loose cresting hills and bumps. =20 Why yes it was.......... =20 Lynn E. Hanover =20 _________________________________________________________________ Hotmail has tools for the New Busy. Search=2C chat and e-mail from your inb= ox. http://www.windowslive.com/campaign/thenewbusy?ocid=3DPID28326::T:WLMTAGL:O= N:WL:en-US:WM_HMP:042010_1= --_a0493419-5fc3-48b2-bf24-68784b2d3187_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable lynn=2C my 20b is for sale with intake and coolers =3B 2=2C500.00
could you pass it along =3B thx


steve parkins



 =3B
To: flyrotary@lancaironline.net
Date: Mon=2C 21 Jun 2010 12:14:46 -0400<= BR>From: lehanover@gmail.com
Subject: [FlyRotary] Re: 13B rotary engines=

In a message dated 6/21/2010 11:03:01 A.M. Eastern Standard Time=2C rv-4mike@cox.net writes:
Thanks for the feedback Lynn. Unusual to see a "p= oor port design" actually aid performance.
 =3B
Mike Wills

 =3B
It is not obvious until you start graphing the open and close events= =2C but the side port which uses the side of the rotor as a shutter to open= and close the port=2C offers Mazda great latitude in port timing. =3B = In the periphery ported engine (both ports) it is impossible to arrive at z= ero overlap=2C and have an engine that will produce any power at all. The a= pex seal does not close off either port at all=2C it just valves gasses in = one direction or another.
 =3B
In addition=2C the overlap of the periphery ported engine is far more = effective flow wise than overlap in the side ported engine. One apex seal i= s above the intake port when the opposing apex seal is below the exhaust po= rt. Flow between the two is unobstructed.
 =3B
So=2C at low RPM you get fresh mixture leaving through the exhaust por= t=2C and combinations of burned and unburned fuel and exhaust gasses flowin= g partway back into the intake runners.
 =3B
This reduces the low RPM output to the point that the engine seems qui= t docile=2C and is easy to drive around in the car=2C slowly=2C or possibly= taxi in an aircraft. =3B This would make off idle tuning data useless = as there will be fuel burning right on top of the EGT probes=2C and unburne= d fuel reaching the F/A sensor. =3B
 =3B
The engine will act =3Balong the lines of a piston engine with a l= ong duration cam. When the engine reaches its happy RPM where all of the mi= xture is burning inside the engine=2C it will step up on the "CAM" and you = will see what a good idea this was. Use slow throttle inputs until you find= the "WOW" RPM=2C and be ready with all available rudder.
 =3B
When we first ran a factory periphery port engine=2C we found that the= re were places on the track that would not allow full throttle. This with 1= 1" wide slicks. Thank Heaven for rev limiters. The driver reported the rear= end getting real loose cresting hills and bumps.
 =3B
Why yes it was..........
 =3B
Lynn E. Hanover =3B

Hotmail has tools= for the New Busy. Search=2C chat and e-mail from your inbox. Learn more. = --_a0493419-5fc3-48b2-bf24-68784b2d3187_--