X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from smtp0.av-mx.com ([137.118.16.56] verified) by logan.com (CommuniGate Pro SMTP 5.3.8) with ESMTP id 4365934 for flyrotary@lancaironline.net; Mon, 21 Jun 2010 23:01:13 -0400 Received-SPF: pass receiver=logan.com; client-ip=137.118.16.56; envelope-from=res12@fairpoint.net Received: from main (unknown [209.105.170.154]) (Authenticated sender: res12@fairpoint.net) by smtp0.av-mx.com (Postfix) with ESMTP id 5C7161C0397 for ; Mon, 21 Jun 2010 23:00:38 -0400 (EDT) Message-ID: <766A619BC4B14B519DE45A3E40717E3B@main> From: "Richard Sohn" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Peripheral Port 13B Rotary Engine Date: Mon, 21 Jun 2010 22:01:21 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0111_01CB118D.48902BE0" 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 This is a multi-part message in MIME format. ------=_NextPart_000_0111_01CB118D.48902BE0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable 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_0111_01CB118D.48902BE0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
George,
 
I had focused on the 38mm and was doing = pretty good=20 with it, until I realized I could not maintain a good mixture over the = whole=20 operating range. Obviously, that is why the specification says it is = good for up=20 to 65hp.
Even so the carb is=20 44mm now, my intake runner is still 38mm maintaining the intake=20 tuning.
 
Richard Sohn
N2071U
----- Original Message -----
From:=20 George=20 Lendich
Sent: Monday, June 21, 2010 = 4:59 PM
Subject: [FlyRotary] Re: = Peripheral Port=20 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 had=20 the single that high. I would have to run the numbers but = thought you=20 would get away with a 38/40mm carb and push up the = 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 BFSC=20 of .5 . May be a little optimistic. Mixture was slightly rich at the = tests.=20
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 of=20 music in regard to projected HP at RPM, at optimum performance. So = what=20 weight have you got on that flywheel, it seems to be a cut down = manual=20 cast flywheel from a past photo. I figured I might need a heavier = flywheel=20 than the flexplate and was considering having one of those = aftermarket=20 steel ones made and have mounting holes included to suite what = ever damper=20 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=20 and disadvantages?

 

Thanks,

 

Bob = = Rogers

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