X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from mail-bk0-f52.google.com ([209.85.214.52] verified) by logan.com (CommuniGate Pro SMTP 6.0c1) with ESMTPS id 5724700 for flyrotary@lancaironline.net; Wed, 22 Aug 2012 19:08:25 -0400 Received-SPF: none receiver=logan.com; client-ip=209.85.214.52; envelope-from=andrew@martinag.com.au Received: by bkcjf3 with SMTP id jf3so26602bkc.25 for ; Wed, 22 Aug 2012 16:07:49 -0700 (PDT) X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=20120113; h=mime-version:x-originating-ip:in-reply-to:references:date :message-id:subject:from:to:content-type:x-gm-message-state; bh=I59M0EmWirTrSU7vRbP/miTRs7y993WgFzTgjiR0iN8=; b=EyU/ect6jggAFmfRjb8bsQEmqmZzyC1+qiQR+qMNOtD1gOy35Px2MGbHhhE7Tkcgrj E42XmObdPJ6bEkoCN1asNrikRXmN5wEUBEDr8XGCwCTWD7fey8Vdz9hrdVpCTAAUko3X mpi0x6JAz7c0BDBNbD7mQl5obagSbsaz3B+oHGmq03G6qlrzflzczQujJU/FJFc0I92J gEuWCqUv8sKvWXqrBIlsDQpDViQEdq4hAc1uoFesASAXCmGLi8O/UPNomCFW4MGwWgDl ke4LwYIDzLn6Oz1j0dn5lemwKbRGQ83oDjA7MjAk5CDv8hWuK0sHu9F0yPlrCyh+1gv8 +q+Q== MIME-Version: 1.0 Received: by 10.204.152.216 with SMTP id h24mr6981728bkw.42.1345676868663; Wed, 22 Aug 2012 16:07:48 -0700 (PDT) Received: by 10.204.150.138 with HTTP; Wed, 22 Aug 2012 16:07:48 -0700 (PDT) X-Originating-IP: [202.40.0.40] In-Reply-To: References: Date: Thu, 23 Aug 2012 07:07:48 +0800 Message-ID: Subject: Re: [FlyRotary] Re: Check Temps on Climbout was e: [FlyRotary] Turboquestion. From: Andrew Martin To: Rotary motors in aircraft Content-Type: multipart/alternative; boundary=0015175cdf38bd387304c7e2cf44 X-Gm-Message-State: ALoCoQmib7IaseQZ/StizZKcC8eTJ2ruftDI7daJ7V0Zl2ys1UCpFi34Et6urky66GbxFoiHIwng --0015175cdf38bd387304c7e2cf44 Content-Type: text/plain; charset=ISO-8859-1 Chris if your blow off valve is before the intercooler, it may just be opening too soon with that 3lb spring and allowing all your air to vent, then the engine would act as NA but with the intercooler as a added restriction. try a heavier spring. Andrew On Thu, Aug 23, 2012 at 6:53 AM, Chris Barber wrote: > Thanks Ed. I am pleased you verified my concern after my cooling > skyrocketing yesterday when I went to full power. > > Trying to determine where the restriction is now. > > You are the best. > > Sent from my iPhone 4 > > On Aug 22, 2012, at 4:48 PM, "Ed Anderson" > wrote: > > > Chris, One thing to be checking on your next take off is your > coolant/oil temps. As you know take-off is the worst combination of low > cooling air mass flow and max engine temperature due to WOT. > > > > You would be surprised how quickly (with the additional power you now > have) you will exceed your cooling limits if not careful. So I would be > certain to check the temps at a frequent rate on your next take-off until > you know how the system is going to react - hate to see you cook your > engine during your first real Turbo climb out. > > > > I find for my Rv-6A that I needed to get to 120 mph IAS as quick as > possible to get on the good side of the cooling curve. So that generally > meant take off - get safely above surround obstructions, then level > off/reduce climb until airspeed hit 120. Then I could resume climb with > cooling gradually bring the temps down as altitude and airflow increased. > Your sweet spot airspeed would undoubtedly be different given different > platform and cooling set up. > > > > Ed > > > > -------------------------------------------------- > > From: "Chris Barber" > > Sent: Monday, August 20, 2012 9:17 PM > > To: "Rotary motors in aircraft" > > Subject: [FlyRotary] Turbo question. > > > >> As I have mentioned I have had what I think are incongruent readings > regarding my manifold pressure (mp)and engine rpm. It seems I am getting > quite low mp as I add power to higher rpm. > >> > >> I am not well versed in this area but my thought is that as I add > power, even with slight boost (currently using a 3 lb spring in my > wastegate) eventually my mp should raise a bit more. > >> > >> Today I did some static test. I recorded engine RPM with the turbo > hooked up and recorded the mp at 1000 rpm increments. Then I removed the > turbo plumbing from my intake and recorded the same info My results > currently confuse me. > >> > >> With the turbo hooked up I am getting > >> > >> RPM. MP inches > >> 2000 - 14.0 > >> 3000 - 15.5 > >> 4000 - 19.3 > >> 5000 - 21.6 > >> 5700 - 24.5 (topped out) > >> > >> With the turbo removed. > >> > >> 2000 - 15.8 > >> 3000 - 15.3 > >> 4000 - 19.7 > >> 5000 - 24.8 > >> 5833 - 29.8 > >> > >> Is this indicative of restriction in my plumbing? Perhaps in the inter > cooler? A dirty air filter? A bad pop off valve or a leak not allowing the > air pressure getting to the intake. Or???? > >> > >> I am uncertain what other permitters I need to check and provide. I am > just starting my diagnosis in my Phase One testing. I only have 1.6 hours > in the air so far. I value ya'll's direction and input. > >> > >> Heck, perhaps this is working properly but it just doesn't seem > right/comfortable. > >> > >> Thanks folks. > >> > >> Chris Barber > >> Houston > >> Velocity SE > >> Rotary 13b turbo (?) :-) > >> > >> > >> > >> Sent from my iPhone 4 > >> -- > >> Homepage: http://www.flyrotary.com/ > >> Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > >> > >> > >> ----- > >> No virus found in this message. > >> Checked by AVG - www.avg.com > >> Version: 2012.0.2197 / Virus Database: 2437/5211 - Release Date: > 08/20/12 > >> > > > > -- > > Homepage: http://www.flyrotary.com/ > > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > > -- > Homepage: http://www.flyrotary.com/ > Archive and UnSub: > http://mail.lancaironline.net:81/lists/flyrotary/List.html > -- Regards Andrew Martin Martin Ag 275 Newmarracarra Rd Moonyoonooka WA 6532 0427477144 08 99241145 andrew@martinag.com.au --0015175cdf38bd387304c7e2cf44 Content-Type: text/html; charset=ISO-8859-1 Content-Transfer-Encoding: quoted-printable Chris

if your blow off valve is before the intercooler, it may just = be opening too soon with that 3lb spring and allowing all your air to vent,= then the engine would act as NA but with the intercooler as a added restri= ction. try a heavier spring.

Andrew

On Thu, Aug 23, 2012 at 6:53 A= M, Chris Barber <cbarber@texasattorney.net> wrote:
Thanks Ed. I am pleased you verified my concern after my cooling skyrocketi= ng yesterday when I went to full power.

Trying to determine where the restriction is now.

You are the best.

Sent from my iPhone 4

On Aug 22, 2012, at 4:48 PM, = "Ed Anderson" <ea= nderson@carolina.rr.com> wrote:

> Chris, One thing to be checking on your next take off is your coolant/= oil temps. =A0As you know take-off is the worst combination of low cooling = air mass flow and max engine temperature due to WOT.
>
> You would be surprised how quickly (with the additional power you now = have) you will exceed your cooling limits if not careful. =A0So I would be = certain to check the temps at a frequent rate on your next take-off until y= ou know how the system is going to react - hate to see you cook your engine= during your first real Turbo climb out.
>
> I find for my Rv-6A that I needed to get to 120 mph IAS as quick as po= ssible to get on the good side of the cooling curve. =A0So that generally m= eant take off - get safely above surround obstructions, then level off/redu= ce climb until airspeed hit 120. =A0Then I could resume climb with cooling = gradually bring the temps down as altitude and airflow increased. =A0Your s= weet spot airspeed would undoubtedly be different given different platform = and cooling set up.
>
> Ed
>
> --------------------------------------------------
> From: "Chris Barber" <cbarber@texasattorney.net>
> Sent: Monday, August 20, 2012 9:17 PM
> To: "Rotary motors in aircraft" <flyrotary@lancaironline.net>
> Subject: [FlyRotary] Turbo question.
>
>> As I have mentioned I have had what I think are incongruent readin= gs regarding my manifold pressure (mp)and engine rpm. It seems I am getting= quite low mp as I add power to higher rpm.
>>
>> I am not well versed in this area but my thought is that as I add = power, even with slight boost (currently using a 3 lb spring in my wastegat= e) eventually my mp should raise a bit more.
>>
>> Today I did some static test. I recorded engine RPM with the =A0tu= rbo hooked up and recorded the mp at 1000 rpm increments. Then I removed th= e turbo plumbing from my intake and recorded the same info My results curre= ntly confuse me.
>>
>> With the turbo hooked up I am getting
>>
>> RPM. =A0 MP inches
>> 2000 - 14.0
>> 3000 - 15.5
>> 4000 - 19.3
>> 5000 - 21.6
>> 5700 - 24.5 (topped out)
>>
>> With the turbo removed.
>>
>> 2000 - 15.8
>> 3000 - 15.3
>> 4000 - 19.7
>> 5000 - 24.8
>> 5833 - 29.8
>>
>> Is this indicative of restriction in my plumbing? Perhaps in the i= nter cooler? A dirty air filter? A bad pop off valve or a leak not allowing= the air pressure getting to the intake. Or????
>>
>> I am uncertain what other permitters I need to check and provide. = I am just starting my diagnosis in my Phase One testing. I only have 1.6 ho= urs in the air so far. I value ya'll's direction and input.
>>
>> Heck, perhaps this is working properly but it just doesn't see= m right/comfortable.
>>
>> Thanks folks.
>>
>> Chris Barber
>> Houston
>> Velocity SE
>> Rotary 13b turbo (?) :-)
>>
>>
>>
>> Sent from my iPhone 4
>> --
>> Homepage: =A0http://www.flyrotary.com/
>> Archive and UnSub: http://mail.lancaironline.net:81/= lists/flyrotary/List.html
>>
>>
>> -----
>> No virus found in this message.
>> Checked by AVG - = www.avg.com
>> Version: 2012.0.2197 / Virus Database: 2437/5211 - Release Date: 0= 8/20/12
>>
>
> --
> Homepage: =A0h= ttp://www.flyrotary.com/
> Archive and UnSub: =A0 http://mail.lancaironline.net:81/= lists/flyrotary/List.html

--
Homepage: =A0http:/= /www.flyrotary.com/
Archive and UnSub: =A0 http://mail.lancaironline.net:81/lists= /flyrotary/List.html



--
Regards
=
Andrew Martin
Martin Ag
275 Newmarracarra Rd
Moonyoonooka WA 6= 532

0427477144
08 99241145
andrew@martinag.com.au
--0015175cdf38bd387304c7e2cf44--