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 5.3.8) with ESMTP id 4366127 for flyrotary@lancaironline.net; Tue, 22 Jun 2010 05:00:32 -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 0979A1735F6 for ; Tue, 22 Jun 2010 16:59:54 +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 6812BBEC02A for ; Tue, 22 Jun 2010 16:59:54 +0800 (WST) Message-ID: From: "George Lendich" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Peripheral Port 13B Rotary Engine Date: Tue, 22 Jun 2010 19:00:02 +1000 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0045_01CB123D.1E8C3040" 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 100621-1, 06/21/2010), Outbound message X-Antivirus-Status: Clean This is a multi-part message in MIME format. ------=_NextPart_000_0045_01CB123D.1E8C3040 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Thanks Richard, That's interesting! Did you have a choke or reduction in throat size in = the 38mm carbie, and does the Mikuni have a venturi throat George (down under) George, I had focused on the 38mm and was doing pretty good with it, until I = realized I could not maintain a good mixture over the whole operating = range. Obviously, that is why the specification says it is good for up = to 65hp.=20 Even so the carb is 44mm now, my intake runner is still 38mm = maintaining the intake tuning. Richard Sohn N2071U ----- Original Message -----=20 From: George Lendich=20 To: Rotary motors in aircraft=20 Sent: Monday, June 21, 2010 4:59 PM Subject: [FlyRotary] Re: Peripheral Port 13B Rotary Engine Richard, Ah The magic 44mm. I know you are running a 12A but at what rpm = are you running out of breathing, provided you have had the single that = high. I would have to run the numbers but thought you would get away = with a 38/40mm carb and push up the velocity.=20 George (down under), this flywheel is my design, it is steel with the cut outs for = balancing. The steel section is 14mm thick, and the ring gear is 250mm = diameter, coming off a Metro Geo engine.=20 I calculated my hp from fuel flow using a BFSC of .5 . May be a = little optimistic. Mixture was slightly rich at the tests.=20 I am running now a Mikuni VM44 carb. Richard Sohn N2071U ----- Original Message -----=20 From: George Lendich=20 To: Rotary motors in aircraft=20 Sent: Monday, June 21, 2010 3:39 AM Subject: [FlyRotary] Re: Peripheral Port 13B Rotary Engine Richard,=20 We seem to be singing from the same sheet of music in regard to = projected HP at RPM, at optimum performance. So what weight have you got = on that flywheel, it seems to be a cut down manual cast flywheel from a = past photo. I figured I might need a heavier flywheel than the flexplate = and was considering having one of those aftermarket steel ones made and = have mounting holes included to suite what ever damper I incorporate. BTW this is single rotor specific if anyone was confused. George (down under) Is anyone flying with a Mazda 13B peripheral port engine? If = so, how is it working? Can you describe the advantages and = disadvantages? =20 Thanks, =20 Bob Rogers ------=_NextPart_000_0045_01CB123D.1E8C3040 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
 Thanks Richard,
That's interesting! Did you have a = choke or=20 reduction in throat size in the 38mm carbie, and does the Mikuni = have a=20 venturi throat
George (down under)
George,
 
I had focused on the 38mm and was = doing pretty=20 good with it, until I realized I could not maintain a good mixture = over the=20 whole operating range. Obviously, that is why the specification says = it is=20 good for up to 65hp.
Even so the carb=20 is 44mm now, my intake runner is still 38mm maintaining the intake=20 tuning.
 
Richard Sohn
N2071U
----- Original Message -----
From:=20 George=20 Lendich
To: Rotary motors in = aircraft=20
Sent: Monday, June 21, 2010 = 4:59=20 PM
Subject: [FlyRotary] Re: = Peripheral=20 Port 13B Rotary Engine

 
Richard,
Ah The magic 44mm. I know you are = running a=20 12A but at what rpm are you running out of breathing, provided you = have=20 had the single that high. I would have to run the numbers but = thought=20 you would get away with a 38/40mm carb and push up the=20 velocity. 
George (down under),
 
this flywheel is my design, it is = steel with=20 the cut outs for balancing. The steel section is 14mm thick, and = the ring=20 gear is 250mm diameter, coming off a Metro Geo engine. =
I calculated my hp from fuel flow = using a=20 BFSC of .5 . May be a little optimistic. Mixture was slightly rich = at the=20 tests.
I am running now a Mikuni VM44=20 carb.
 
Richard Sohn
N2071U
 
 
----- Original Message ----- =
From:=20 George=20 Lendich
To: Rotary motors in = aircraft=20
Sent: Monday, June 21, = 2010 3:39=20 AM
Subject: [FlyRotary] Re: = Peripheral=20 Port 13B Rotary Engine

 Richard,
We seem to be singing from the = same sheet=20 of music in regard to projected HP at RPM, at optimum = performance. So=20 what weight have you got on that flywheel, it seems to be a cut = down=20 manual cast flywheel from a past photo. I figured I might need a = heavier=20 flywheel than the flexplate and was considering having one of = those=20 aftermarket steel ones made and have mounting holes included to = suite=20 what ever damper I incorporate.
BTW this is single rotor = specific if anyone=20 was confused.
George (down = under)
Is = anyone=20 flying with a Mazda 13B peripheral port engine?  If so, how is it = working?  Can you describe the = advantages and disadvantages?

 

Thanks,

 

Bob=20 = Rogers

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