Return-Path: Received: from [24.25.9.103] (HELO ms-smtp-04-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2b6) with ESMTP id 301206 for flyrotary@lancaironline.net; Fri, 09 Jul 2004 22:00:50 -0400 Received: from EDWARD (clt25-78-058.carolina.rr.com [24.25.78.58]) by ms-smtp-04-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i6A20HVw014423 for ; Fri, 9 Jul 2004 22:00:18 -0400 (EDT) Message-ID: <005501c46621$a7839970$2402a8c0@EDWARD> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Turbo post mortem Date: Fri, 9 Jul 2004 22:00:20 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0052_01C46600.203FECF0" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MIMEOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0052_01C46600.203FECF0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Well, seemed to have lost the formating on the last message regarding = whether the compressor map was a match for the Mazda turbo. Here it is again ratio Boost psi =20 l bm =20 CFM =20 RPM =20 1.5 7.35 10 87.7193 1894. =20 1.7 10.29 20 175.4386 3789. =20 1.8 11.76 26 228.0702 4926. =20 Ed Anderson RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message -----=20 From: "Ed Anderson" To: "Rotary motors in aircraft" Sent: Friday, July 09, 2004 5:57 PM Subject: [FlyRotary] Re: Turbo post mortem >=20 > It well might be. Taking that flow chart and trying to back engineer = the > engine operating parameters here is what I get >=20 > ratio > Boost psi > lbm > CFM > RPM >=20 > 1.5 > 7.35 > 10 > 87.7193 > 1894.736842 >=20 > 1.7 > 10.29 > 20 > 175.4386 > 3789.473684 >=20 > 1.8 > 11.76 > 26 > 228.0702 > 4926.315789 >=20 >=20 > as possible operating parameters for the RX-7 engine (single turbo pre = 1993 > Rx-7). We know throught SAE papers that the Mazda engineers tailored = the > post 1987 turbos to boost performance at the lower rpms. So this = might well > be a close match to the compressor map for the Ht 18. Do these boost = rpm > parameters look close to any of your turbo Rx-7 drivers with models = between > 1987 and 1993???? Looks like you would get lots of boost at fairly = low > rpms with this turbo on a rotary. >=20 >=20 > Ed Anderson >=20 >=20 > > A discussion of john's turbo failure, along with pictures, is = occurring at > > > > http://canardaviationforum.dmt.net/showthread.php?t=3D5 > > > > I thought to mention to this group that I have been told the Hitachi = ht-18 > > (john's)turbo is very close to a garret t3 50 trim. > > > > Can any one verify or rebut this? > > > > I include a copy of the compressor map for your edification. > > > > >=20 >=20 > = -------------------------------------------------------------------------= --- > ---- >=20 >=20 >=20 >=20 >=20 >=20 > = -------------------------------------------------------------------------= --- > ---- >=20 >=20 > > >> Homepage: http://www.flyrotary.com/ > > >> Archive: http://lancaironline.net/lists/flyrotary/List.html > > >=20 >=20 >=20 > >> Homepage: http://www.flyrotary.com/ > >> Archive: http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0052_01C46600.203FECF0 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Well, seemed to have lost the formating = on the last=20 message regarding whether the compressor map was a match for the Mazda=20 turbo.
 
Here it is again
 

ratio

Boost psi   

        =20 l bm  

    =20 CFM          =

          = =20 RPM

1.5

7.35

10

87.7193

1894.

1.7

10.29

20

175.4386

3789.

1.8

11.76

26

228.0702

4926.

 
 
 
Ed Anderson
RV-6A N494BW Rotary=20 Powered
Matthews, NC
----- Original Message -----
From: "Ed Anderson" <eanderson@carolina.rr.com>
To: "Rotary motors in aircraft" = <flyrotary@lancaironline.net>
Sent: Friday, July 09, 2004 5:57 = PM
Subject: [FlyRotary] Re: Turbo post=20 mortem

>
>  It well might be.  Taking that flow = chart and=20 trying to back engineer the
> engine operating parameters here is = what I=20 get
>
> =          =20 ratio
>         =20 Boost     psi
>=20              = lbm
>          CFM
> =          RPM
>
>=20       1.5
>      = 7.35
>=20      10
>      = 87.7193
>=20      1894.736842
>
>=20       1.7
>     =20 10.29
>      20
> =     =20 175.4386
>      3789.473684
>
>=20       1.8
>     =20 11.76
>      26
> =     =20 228.0702
>      4926.315789
>
> =
>=20 as possible operating parameters for the RX-7 engine (single turbo pre=20 1993
> Rx-7).  We know throught SAE papers that  the = Mazda=20 engineers tailored the
> post 1987 turbos to boost performance at = the=20 lower rpms.  So this might well
> be a close match to the = compressor=20 map for the Ht 18. Do these boost rpm
> parameters look close to = any of=20 your turbo Rx-7 drivers with models between
> 1987 and = 1993???? =20 Looks like you would get lots of boost at fairly  low
> rpms = with=20 this turbo on a rotary.
>
>
> Ed Anderson
> =
>=20
> > A discussion of john's turbo failure, along with pictures, = is=20 occurring at
> >
> > http://canardaviationforum.dmt.net/showthread.php?t=3D5
> >
> > I thought to mention to = this group that=20 I have been told the Hitachi ht-18
> > (john's)turbo is very = close to a=20 garret t3 50 trim.
> >
> > Can any one verify or rebut = this?
> >
> > I include a copy of the compressor map = for your=20 edification.
> >
> >
>
>
>=20 -------------------------------------------------------------------------= ---
>=20 ----
>
>
>
>
>
>
>=20 -------------------------------------------------------------------------= ---
>=20 ----
>
>
> > >>  Homepage:  = http://www.flyrotary.com/
> >=20 >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html> >
>
>
>
> = >> =20 Homepage:  http://www.flyrotary.com/
>=20 >>  Archive:   http://lancaironline.net/lists/flyrotary/List.html ------=_NextPart_000_0052_01C46600.203FECF0--