Return-Path: <13brv3@bellsouth.net> Received: from imf19aec.mail.bellsouth.net ([205.152.59.67] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with ESMTP id 2929515 for flyrotary@lancaironline.net; Mon, 12 Jan 2004 17:51:57 -0500 Received: from rad ([68.155.99.73]) by imf19aec.mail.bellsouth.net (InterMail vM.5.01.06.05 201-253-122-130-105-20030824) with ESMTP id <20040112225156.TAHM1950.imf19aec.mail.bellsouth.net@rad> for ; Mon, 12 Jan 2004 17:51:56 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] 100 hp options. Date: Mon, 12 Jan 2004 16:49:54 -0600 Message-ID: <006f01c3d95e$65b17df0$6001a8c0@rad> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0070_01C3D92C.1B170DF0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.4510 Importance: Normal In-Reply-To: X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 This is a multi-part message in MIME format. ------=_NextPart_000_0070_01C3D92C.1B170DF0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable I intend to build a Zenair CH801 (13B), at the moment it is not approved = by the PFA, my second choice is a CH701. My dilemma is ; to match a rotary = to 100hp efficiently would it be best to "make" a single rotor, run a 13B direct, de-rate a 13B/PSRU or use the Soob EA81 that I already have. =20 =20 Hi Tony, =20 Welcome to Flyrotary. We're a pretty civil group here, so fear not :-) = =20 As for your engine choice, I think the only reasonable Mazda rotary = option for 100 HP is the single rotor. The normal 13B probably won't give you = an acceptable power to weight ratio for only 100 HP. For example, the = "normal" installed weight for a 13B is around 325#, which is a lot for only 100 = HP. The good news is that several folks, including Richard Sohn (on the = list) are developing some promising single rotors. =20 =20 There are also some commercially available, smaller rotaries that would = be suitable, but they're expensive, and somewhat unavailable. =20 =20 Cheers, Rusty =20 ------=_NextPart_000_0070_01C3D92C.1B170DF0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
I intend to build a Zenair CH801 (13B), = at the=20 moment it is not approved by the PFA, my second choice is a CH701. My = dilemma is=20 ; to match a rotary to 100hp efficiently would it be best to "make" a = single=20 rotor, run a 13B direct, de-rate a 13B/PSRU or use the Soob EA81 = that I=20 already have.
 
 
Hi=20 Tony,
 
Welcome to=20 Flyrotary.  We're a pretty civil group here, so fear not = :-) =20
 
As for your=20 engine choice, I think the only reasonable Mazda rotary option for = 100 HP=20 is the single rotor.  The normal 13B probably won't give you an = acceptable=20 power to weight ratio for only 100 HP.  For example, the "normal" = installed=20 weight for a 13B is around 325#, which is a lot for only 100 HP.  = The good=20 news is that several folks, including Richard Sohn (on the list) are = developing=20 some promising single rotors. 
 
There are=20 also some commercially available, smaller rotaries that would be=20 suitable, but they're expensive, and somewhat=20 unavailable.  
 
Cheers,
Rusty
  
------=_NextPart_000_0070_01C3D92C.1B170DF0--