X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=NYOYKFL4 c=1 sm=1 tr=0 a=CFuOtv4x9PT3uejCWY+iqg==:117 a=x7bEGLp0ZPQA:10 a=ad1WmcueCrwA:10 a=sTwFKg_x9MkA:10 a=3oc9M9_CAAAA:8 a=Ia-xEzejAAAA:8 a=2-ESfFLFAAAA:8 a=Z164nbgdAAAA:8 a=DIPjVFyKAAAA:8 a=OF8v4jzGIAK1rOvy1EQA:9 a=QEXdDO2ut3YA:10 a=oqJn3Sujptv7Se2K1d0A:9 a=kIs9rYxd9lkaHo8s:21 a=Urk15JJjZg1Xo0ryW_k8:22 a=BJFc_SdLMqBtkEIQi4mM:22 a=Y4TUgQDb98Ia9wClvSDa:22 a=rOpJtNhyx_XFkKwMnPcV:22 From: "William Jepson wrjjrs@gmail.com" Received: from mail-lf1-f53.google.com ([209.85.167.53] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 219471 for flyrotary@lancaironline.net; Thu, 07 May 2020 19:32:12 -0400 Received-SPF: pass receiver=logan.com; client-ip=209.85.167.53; envelope-from=wrjjrs@gmail.com Received: by mail-lf1-f53.google.com with SMTP id s9so5957827lfp.1 for ; Thu, 07 May 2020 16:32:13 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=mime-version:references:in-reply-to:from:date:message-id:subject:to; bh=Iu/vGpJTDsGa64prikq31a7CpC+bUydit4Lbga6ivd8=; b=ghCs1u22mHv4GI2C3vSdOd+H6QSYdo/1Spb1+5MqulQtZBenVtYtOfWow0WrBDuVsk HRmROfnVe2VeFvDj8aEBNxfhLtneYbbl015X/5cYpfenTrzesFLrwdVl0ZH0LcZtz9EG gxQl+ZqMez1KxhEpg5qTFyURI+CjVSXAARwtqD1c0H7zRejstW1rAqIrGuRen7kyo5N5 7sSiDDY79GAMEHEc5QBhsvMedBeRvjOL85qSm3YR1rysZE/f01v7FBcfeZzyvpXkx3BD iYbDWMEHO1lXX+5EOHQHMuh9gtqXw9CgHYd/ANDLR9JJ9/mCx+7A406ojaAKJPJxEaFs MFhQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:mime-version:references:in-reply-to:from:date :message-id:subject:to; bh=Iu/vGpJTDsGa64prikq31a7CpC+bUydit4Lbga6ivd8=; b=Fw3ovgg/pRXVJagUeJQ0+7sR/wOG7AFGIdfL65dM+m4gRCqK/I9plw/ZXk+Oy/Sc+W 86a7q8IrqYTIIs4KUmnOltkgsRB924EItwwfmbP5GfvfK4GDSBaY0MV0xpx5KpNX7iZi MaNicZnELNJWrn4GM4AxR++jE/Mm+k6Zi5rIKdUsKuFm8okEqvX0rmJK/SNYl49tdk7D 5hr6a5KIYkp1IadOnrarbulRALeV2j86cP6ut27PcRR3Cxp6g4kJU2LSSSkJ36nNCPMX qto8zCAkIFRyVsuTreGrAbae2IvPNWGe1L2D5GmjPr3Trem8FyFwBEjcs8mxYKOTg8tD j7Sw== X-Gm-Message-State: AGi0Puam7FVEqdyF40mFl5Zv96EWcIIVIGIhZ/lSdBsVgKreZs74fbDx Qm6yoWY8e7kUqayLCIPcuZC+Kwpmmf1gNDccJRa/qcBL X-Google-Smtp-Source: APiQypIBPe1kiEOM+swkOKnjxnWFUIBxuPxk4BstOxnUj+YH9/vqejlyt+C6BFrJRuNg9eC2D04TyDZ6IO2+yV5/S0Q= X-Received: by 2002:a05:6512:31ca:: with SMTP id j10mr9656152lfe.74.1588894314620; Thu, 07 May 2020 16:31:54 -0700 (PDT) MIME-Version: 1.0 References: In-Reply-To: Date: Thu, 7 May 2020 16:31:45 -0700 Message-ID: Subject: Re: [FlyRotary] Re: [EXTERNAL MESSAGE] [FlyRotary] Turbos To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary="000000000000356a4c05a517492d" --000000000000356a4c05a517492d Content-Type: text/plain; charset="UTF-8" Rich, Cars typically use an initially closed wastegate to help the turbo spool up faster. If using the exhaust side to limit the max boost (as with an aircraft) you can use a fixed aperture. I would suggest routing it into the downstream exhaust. Bill On Thu, May 7, 2020 at 3:44 PM argoldman@aol.com < flyrotary@lancaironline.net> wrote: > Not so sure about that > > I think that there are some store bought aircraft that use a fixed > aperture. I believe the early Piper Seneca IIs did. > It;s been quite a while but my rapidly fading memory indicates that. A > waste gate is certainly more efficient whether manual or automatically > actuated. > > Rich > > In a message dated 5/7/2020 5:15:13 PM Central Standard Time, > flyrotary@lancaironline.net writes: > > You need a wastegate on your exhaust side to regulate the amount of > boost. Without it, you could overboost and create detonation A pressure > relief valve is used to prevent overpressuring the intake side if you slam > the throttle shut. It does not regulate the amount of boost. If you are > always careful to close your throttle slowly, you may not need a pressure > relief valve, but you should always have a wastegate. See the links below > for more info. > > > > > https://www.onallcylinders.com/2017/01/19/wastegates-vs-blow-off-valves-whats-the-difference/ > > > > https://grassrootsparts.com/blogs/technical/blow-off-valve-vs-wastegate > > > > > https://www.hotrod.com/articles/spotters-guides-wastegates-and-blow-off-valves/ > > > > Bob Rogers > > > > > > > > > > *From:* Rotary motors in aircraft > *Sent:* Thursday, May 07, 2020 4:47 PM > *To:* Rotary motors in aircraft > *Subject:* [EXTERNAL MESSAGE] [FlyRotary] Turbos > > > > Can anyone help me with the following? With a turbo, can I just use a > pressure relief valve and negate the wastegate totally?? Looking for > simplicity and weight saving. Neil. > > --000000000000356a4c05a517492d Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable
Rich,
Cars typically use an initially closed wastegate= to help the turbo spool up faster. If using=C2=A0the exhaust side to limit= the max boost (as with an aircraft) you can use a fixed aperture. I would = suggest routing it into the downstream exhaust.=C2=A0
Bill=C2=A0<= /div>

On Thu, May 7, 2020 at 3:44 PM ar= goldman@aol.com <flyr= otary@lancaironline.net> wrote:
Not so sure about that

I think that there are some store bought aircraft that use= a fixed aperture. I believe the early Piper Seneca IIs did.
It;s been quite a while but my rapidly fading memory indic= ates that. A waste gate is certainly more efficient whether manual or autom= atically actuated.

Rich

In a message dated 5/7/2020 5:15:13 PM Central Standard Time, flyrotary@lancaironline= .net writes:

You need a wastega= te on your exhaust side to regulate the amount of boost.=C2=A0 Without it, = you could overboost and create detonation=C2=A0=C2=A0 A pressure relief val= ve is used to prevent overpressuring the intake side if you slam the thrott= le shut.=C2=A0 It does not regulate the amount of boost.=C2=A0 If you are a= lways careful to close your throttle slowly, you may not need a pressure re= lief valve, but you should always have a wastegate. See the links below for= more info.

=C2=A0

https://www.onal= lcylinders.com/2017/01/19/wastegates-vs-blow-off-valves-whats-the-differenc= e/

=C2=A0

https://grassrootsparts.com/blogs/tech= nical/blow-off-valve-vs-wastegate

=C2=A0

https://www.hotrod.com/article= s/spotters-guides-wastegates-and-blow-off-valves/

=C2=A0

Bob Rogers<= /p>

=C2=A0

=C2=A0

=C2=A0

=C2=A0

From: Rotary motors in aircraft <flyrotary@lancaironline.net>
Sent: Thursday, May 07, 2020 4:47 PM
To: Rotary motors in aircraft <flyrotary@lancaironline.net>
Subject: [EXTERNAL MESSAGE] [FlyRotary] Turbos

=C2=A0

Can anyone help me with the following?=C2=A0=C2=A0= =C2=A0 With a turbo, can I just use a pressure relief valve and negate the = wastegate totally??=C2=A0 =C2=A0=C2=A0Looking for simplicity and weight sav= ing.=C2=A0=C2=A0 Neil.

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