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Date: Thu, 17 Dec 2009 20:03:09 -0600
Message-ID: <5cf132c0912171803s15f45d4fs8c00f1cc742258d5@mail.gmail.com>
Subject: Re: [FlyRotary] Re: Oil Cooling
From: Mark Steitle <msteitle@gmail.com>
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Content-Type: multipart/alternative; boundary=000325557956389b81047af724a8

--000325557956389b81047af724a8
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George,

Yes, at 7500 max rpm, I probably won't see 375hp.  And at my normal cruise
rpm of 5200, I'll be lucky to see 300hp.  But that is why I'm building the
pport, for that little extra over the side port n/a engine.  I do have a
ram-air system, but it only provides about 1/2" MAP boost.  So, I'll take
what I get.  I anticipate the pport engine will be lighter due to a
simplified intake and a new exhaust.  If I can shave 10-15#, then a turbo
could also be in my future.

In reality, I can hit VNE with the present motor, so any hp beyond what I
have now is not good for much except higher climb rates.

Mark

On Thu, Dec 17, 2009 at 3:04 PM, George Lendich <lendich@aanet.com.au>wrote:

>  Mark,
> I notice your Hp requirements for the 20B, which is 125hp per rotor. This
> exactly what I'm aiming for in a single rotor application, but would be
> happy enough with 115hp, if that's all I got.
>
> Given that the motor can only gulp so much fuel and air and HP is dependent
> on RPM, which is restricted in our case. Are you considering any forced
> induction other than tuned inlet .
>
> I've opted to use the RX8 high compression rotor to give me some addition
> HP and am using 44mm inlets to give higher inlet velocity, however my maths
> indicate even with this  arrangement, 125hp might be out of the question.
> Certainly higher RPM would solve the problem, but that's not available with
> reduction ratio I'm considering and many are using, might get to 7,500 but
> that's it.
> George ( down under)
>
>
>
> George,
>
>
> Yes, my Fluidyne cooler should easily do the job of cooling my current
> engine.  But I am building a P-port 20B to replace this motor downstream, so
> I need to design for 375hp (375 x .8 = 300).  The Fluidyne cooler is 297 cu
> in (core size is 9 x 11 x 3).  Close enough for government work.
>
> Mark
>
>

--000325557956389b81047af724a8
Content-Type: text/html; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable

<div>George, </div>
<div>=A0</div>
<div>Yes, at 7500 max rpm, I probably won&#39;t see 375hp.=A0 And at my nor=
mal cruise rpm of 5200, I&#39;ll be lucky to see 300hp.=A0 But that is why =
I&#39;m building the pport, for that little extra over the side port n/a en=
gine.=A0 I do have a ram-air system, but it only provides about 1/2&quot; M=
AP boost.=A0 So, I&#39;ll take what I get.=A0 I anticipate the pport engine=
 will be lighter due to a simplified intake and a new exhaust.=A0 If I can =
shave 10-15#, then a turbo could also be in my future.=A0=A0</div>

<div>=A0</div>
<div>In reality,=A0I can hit=A0VNE with the present motor, so=A0any=A0hp be=
yond=A0what I have now=A0is not good for much except higher climb rates.=A0=
 </div>
<div>=A0</div>
<div>Mark<br><br></div>
<div class=3D"gmail_quote">On Thu, Dec 17, 2009 at 3:04 PM, George Lendich =
<span dir=3D"ltr">&lt;<a href=3D"mailto:lendich@aanet.com.au">lendich@aanet=
.com.au</a>&gt;</span> wrote:<br>
<blockquote class=3D"gmail_quote" style=3D"PADDING-LEFT: 1ex; MARGIN: 0px 0=
px 0px 0.8ex; BORDER-LEFT: #ccc 1px solid">
<div bgcolor=3D"#ffffff">
<div><font face=3D"Arial" size=3D"2">Mark,</font></div>
<div><font face=3D"Arial" size=3D"2">I notice your Hp requirements for the =
20B, which is 125hp per rotor. This exactly what I&#39;m aiming for in a si=
ngle rotor application, but would be happy enough with 115hp, if that&#39;s=
 all I got.</font></div>

<div><font face=3D"Arial" size=3D"2"></font>=A0</div>
<div><font face=3D"Arial" size=3D"2">Given that the motor can only gulp so =
much fuel and air and HP is dependent on RPM, which is restricted in our ca=
se. Are you considering any forced induction other than tuned inlet</font>=
=A0<font face=3D"Arial" size=3D"2">.</font></div>

<div><font face=3D"Arial" size=3D"2"></font>=A0</div>
<div><font face=3D"Arial" size=3D"2">I&#39;ve opted to use the RX8 high com=
pression rotor to give me=A0some addition HP and am using 44mm inlets to gi=
ve higher inlet velocity, however my maths indicate even with this=A0 arran=
gement, 125hp might be out of the question. Certainly higher RPM would solv=
e the problem, but that&#39;s not available with reduction ratio I&#39;m co=
nsidering and many are using, might get to 7,500 but that&#39;s it.</font><=
/div>

<div><font face=3D"Arial" size=3D"2">George ( down under)</font></div>
<div>=A0</div>
<div>=A0</div>
<div>=A0</div>
<div>George, </div>
<blockquote dir=3D"ltr" style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MAR=
GIN-LEFT: 5px; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<blockquote style=3D"PADDING-RIGHT: 0px; PADDING-LEFT: 5px; MARGIN-LEFT: 5p=
x; BORDER-LEFT: #000000 2px solid; MARGIN-RIGHT: 0px">
<div>=A0</div>
<div>Yes, my Fluidyne cooler should easily do the job of cooling my current=
 engine.=A0 But I am=A0building a P-port 20B to replace this motor downstre=
am, so I need to design for 375hp (375 x .8 =3D 300).=A0 The Fluidyne coole=
r is 297 cu in (core size is 9 x 11 x 3).=A0 Close enough for government wo=
rk.=A0 </div>

<div>=A0</div>
<div>Mark<br><br></div></blockquote></blockquote></div></blockquote></div><=
br>

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