X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from poplet2.per.eftel.com ([203.24.100.45] verified) by logan.com (CommuniGate Pro SMTP 5.3.7) with ESMTP id 4327770 for flyrotary@lancaironline.net; Thu, 27 May 2010 03:55:20 -0400 Received-SPF: none receiver=logan.com; client-ip=203.24.100.45; envelope-from=lendich@aanet.com.au Received: from sv1-1.aanet.com.au (mail.aanet.com.au [203.24.100.34]) by poplet2.per.eftel.com (Postfix) with ESMTP id 61421173698 for ; Thu, 27 May 2010 15:54:43 +0800 (WST) Received: from ownerf1fc517b8 (203.171.92.134.static.rev.aanet.com.au [203.171.92.134]) by sv1-1.aanet.com.au (Postfix) with SMTP id 7A056BEC044 for ; Thu, 27 May 2010 15:54:41 +0800 (WST) Message-ID: From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Rotary HP reviisted....now that I know more about it all...kinda. Date: Thu, 27 May 2010 17:54:41 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_00A4_01CAFDC5.AE6D1710" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.5931 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.5931 X-Antivirus: avast! (VPS 100526-1, 05/26/2010), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_00A4_01CAFDC5.AE6D1710 Content-Type: text/plain; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable Chris, Can't answer all your questions, as I don't know how the different port = shapes affect HP. I can however give you my appreciation of Hp and = that is; a standard side port which provide approximately 160 to 180hp = if really lucky. The different side ports vary up to 200 hp +, however = the PP is the ( our) answer in my opinion, as it gives a direct shot = into the combustion chamber. If you use the minimum size PP ( 44mm) for = our RPM ( up to 7,200/ 7,500) you will achieve the 200hp -230hp+. It all = varies with how efficient the inlet and exhaust is done. I know it doesn't answer all your questions, but it's enough for me. Now that Bill Jepson is working on the new PP things should be more = reliable. Reliability is subjective, if you get more power your putting more = stress and wear on the engine - naturally. Apart from that there aren't = any reliability issues with different ports.- that's IMHO. George ( down under) I know this must have been discussed, but perhaps more in passing or = in some of Tracy's literature (now kinda dated, especially with some of = the strides he continues to make), but what is the conventional wisdom = as to rotary horsepower? I know when I first started looking into it, = oh many years ago, it seemed the impression I got was that you could = pretty easily achieve 200 hp, however, that is now a bit lower. Some of = the tricks to get the higher HP was mild and medium porting, bridge, "J" = and "P" porting. Then there was the option of turbo...the one, in = combination with a medium street port, I chose. What say Ye? When started today, mine was turning about 6200 rpm at 35 MP (with a 3 = lb spring in the wastegate).....it surged forward against the chocks and = breaks. IVO prop full fine. Nice feel of power even if it likes to heat = up fast in 90 degree weather like this. Also, I think this was discussed before too, when I go WOT my engine = develops up to about 6250 rpm, but then drops a couple/few hundred rpm = to usually just under 6000....sometimes just above. Thoughts? Ed, = (perhaps Al)it seems you may have chimed in before. Regrettably, when I = search the archives I tend to get frustrated due to thread drift. I heard a lot about porting when I was initially investigating all = this and I chose to use a medium street port. I let Mazdatrix do the = work. That being said, I have read all but nothing on others porting = their engines (other than a LOT from PL on P ports). Since standard = porting does not reportedly effect reliability, only, potentially low = low idle (I can idle as low as about 1300 rpm when warm smoothly) why is = it not discussed and/or utilized more? Just curious guys/gals. Discuss All the best, Chris Barber Houston, GSOT -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [flyrotary@lancaironline.net] on = behalf of Ed Anderson [eanderson@carolina.rr.com] Sent: Wednesday, May 26, 2010 5:15 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Emailing: 3 view w-10 003, first flight Always loved the lines of a Tailwind =96 in fact, I have the plans and = license to build a W-10 sitting on my book shelf. Unfortunately, I = doubt I=92ll ever get around to it. Ok with thermostat in the system holding it at 190F =96 we really = won=92t know how much reserve capacity you have in your cooling system = until the power goes up. I agree with George, 200HP out of an N/A 13B is really pushing it. I = think 180HP is a more realistic expectation =96 but, hey you never know. = It amazing how power goes up when things come together. Enjoy and fly safe.=20 Ed Anderson Rv-6A N494BW Rotary Powered Matthews, NC eanderson@carolina.rr.com http://www.andersonee.com http://www.dmack.net/mazda/index.html http://www.flyrotary.com/ http://members.cox.net/rogersda/rotary/configs.htm#N494BW http://www.rotaryaviation.com/Rotorhead%20Truth.htm -------------------------------------------------------------------------= ----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] = On Behalf Of John Sent: Wednesday, May 26, 2010 2:36 PM To: Rotary motors in aircraft Subject: [FlyRotary] Emailing: 3 view w-10 003, first flight My most humble thank you to flyrotary and all you fine folks that have = helped bring my project to flight. Ed and many others whom I won't try = to name here because I would miss many. The plane is a Wittman Tailwind = W-10, empty wt. is 981 and it is a tri-gear, Wt. is within 6 #'s of = similar trikes w/ 0-320 engines. I have the thermostat in the engine = because most of the year it is not very hot, if we get 50 days with the = temperature over 70, we have had a hot summer, not a lot of beach bunny = activity. 7-1 I'll be 74 and have realized my dream, now it's all = gravy. Again, thanks guys!! JohnD Your message is ready to be sent with the following file or link = attachments: 3 view w-10 003 ------=_NextPart_000_00A4_01CAFDC5.AE6D1710 Content-Type: text/html; charset="Windows-1252" Content-Transfer-Encoding: quoted-printable
 Chris,
Can't answer all your questions, as I = don't know=20 how the different  port shapes affect HP. I can however give you my = appreciation of  Hp  and that is; a standard side port=20 which provide approximately 160 to 180hp if really lucky. The = different=20 side ports vary up to 200 hp +,  however the PP is the ( our) = answer in my=20 opinion, as it gives a direct shot into the combustion chamber. If you = use the=20 minimum size PP ( 44mm) for our RPM ( up to 7,200/ 7,500) you will = achieve the=20 200hp -230hp+. It all varies with how efficient the inlet and exhaust is = done.
I know it doesn't answer all your = questions, but=20 it's enough for me.
Now that Bill Jepson is working on the = new PP=20 things should be more reliable.
Reliability is subjective, if you get = more power=20 your putting more stress and wear on the engine - naturally. Apart from = that=20 there aren't any reliability issues with different ports.- that's=20 IMHO.
George ( down under)
I know this must have been discussed, but perhaps more in passing = or in=20 some of Tracy's literature (now kinda dated, = especially=20 with some of the strides he continues to make), but what is the = conventional=20 wisdom as to rotary horsepower?  I know when I first started = looking into=20 it, oh many years ago, it seemed the impression I got was that you = could=20 pretty easily achieve 200 hp, however, that is now a bit lower.  = Some of=20 the tricks to get the higher HP was mild and medium porting, bridge, = "J" and=20 "P" porting.  Then there was the option of turbo...the one, in=20 combination with a medium street port, I chose.
 
What say Ye?
 
When started today, mine was turning about 6200 rpm at 35 MP = (with a 3 lb=20 spring in the wastegate).....it surged forward against = the=20 chocks and breaks.  IVO prop full fine. Nice = feel of=20 power even if it likes to heat up fast in 90 degree weather like = this.
 
Also, I think this was discussed before too, when I=20 go WOT my engine develops up to about = 6250 rpm,=20 but then drops a couple/few hundred rpm to usually just under=20 6000....sometimes just above.  Thoughts?  Ed, (perhaps Al)it = seems=20 you may have chimed in before.  Regrettably, when I search = the archives I tend to get frustrated due to thread = drift.
 
I heard a lot about porting when I was initially investigating = all this=20 and I chose to use a medium street port.  I=20 let Mazdatrix do the work.  That being said, I = have=20 read all but nothing on others porting their engines (other than a LOT = from PL=20 on P ports).  Since standard porting does not reportedly effect=20 reliability, only, potentially low low idle (I can = idle as=20 low as about 1300 rpm when warm smoothly) why is it not discussed = and/or=20 utilized more?
 
Just curious guys/gals.  Discuss <g>
 
All the best,
 
Chris Barber
Houston, GSOT
From: Rotary motors in aircraft = [flyrotary@lancaironline.net] on=20 behalf of Ed Anderson [eanderson@carolina.rr.com]
Sent: = Wednesday,=20 May 26, 2010 5:15 PM
To: Rotary motors in=20 aircraft
Subject: [FlyRotary] Re: Emailing: 3 view w-10 003, = first=20 flight

Always = loved the=20 lines of a Tailwind =96 in fact, I have the plans and license to build = a W-10=20 sitting on my book shelf.  Unfortunately, I doubt I=92ll ever get = around to=20 it.

 

Ok with = thermostat in=20 the system holding it at 190F =96 we really won=92t know how much = reserve capacity=20 you have in your cooling system until the power goes = up.

 

I agree = with George,=20 200HP out of an N/A 13B is really pushing it.  I think 180HP is a = more=20 realistic expectation =96 but, hey you never know.  It amazing = how power=20 goes up when things come together.

 

Enjoy and = fly safe.=20

Ed=20 Anderson

Rv-6A = N494BW Rotary=20 Powered

Matthews,=20 NC

eanderson@carolina.rr.com

http://www.andersonee.com

http://www.dmack.net/mazda/index.html<= /P>

http://www.flyrotary.com/

http://members.cox.net/rogersda/rotary/configs.htm#N494BW

http://www.rotaryaviation.com/Rotorhead%20Truth.htm

From: Rotary=20 motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of John
Sent: Wednesday, May 26, 2010 = 2:36=20 PM
To: Rotary = motors in=20 aircraft
Subject: = [FlyRotary]=20 Emailing: 3 view w-10 003, first flight

 

My most humble thank you = to=20 flyrotary and all you fine folks that have helped bring my = project=20 to flight.  Ed and many others whom I won't try to name here = because I=20 would miss many.  The plane is a Wittman Tailwind W-10, empty wt. = is 981=20 and it is a tri-gear,  Wt. is within 6 #'s of similar trikes w/ = 0-320=20 engines.  I have the thermostat in the engine because most of the = year it=20 is not very hot, if we get 50 days with the temperature over 70, we = have had a=20 hot summer, not a lot of beach bunny activity.  7-1 I'll be 74 = and have=20 realized my dream, now it's all gravy.  Again, thanks = guys!! =20 JohnD

Your message is ready to be = sent with the=20 following file or link attachments:
3 view w-10=20 = 003

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