Return-Path: Received: from corpprd-pxy1.canfor.ca ([207.230.226.92] verified) by logan.com (CommuniGate Pro SMTP 4.1.3) with ESMTP id 2577153 for flyrotary@lancaironline.net; Fri, 12 Sep 2003 11:52:33 -0400 Received: from exchange.canfor.ca (mail.canfor.ca [198.162.162.49]) by corpprd-pxy1.canfor.ca (Build 103 8.9.3p2/NT-8.9.3) with ESMTP id IAA02023 for ; Fri, 12 Sep 2003 08:52:18 -0700 Received: by mail.canfor.ca with Internet Mail Service (5.5.2653.19) id ; Fri, 12 Sep 2003 08:52:18 -0700 Message-ID: <1F17B59A61D4194095359264D24D22A2708BFB@mailman.canfor.ca> From: "Bartrim, Todd" To: "'Rotary motors in aircraft'" Subject: RE: [FlyRotary] Re: Turbos & EM2 Survey Date: Fri, 12 Sep 2003 08:52:13 -0700 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2653.19) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C37945.D57B7C90" This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C37945.D57B7C90 Content-Type: text/plain Hi Tracy; The large display would certainly be my first choice. The right side of my panel is now completely full with gauges and I don't have half the info that the EM2 will give me. As soon as I receive the EM2, most if not all of those will be removed and the large EM2 will probably look a little lonely. I would guess that most of the side-by-side pilots would prefer large displays, while the tandem pilots will opt for the smaller version. Just my $.02, thanks for asking S. Todd Bartrim Turbo 13B RX-9endurance C-FSTB http://www3.telus.net/haywire/RV-9/C-FSTB.htm "Imagination is more important than knowledge" -Albert Einstein > -----Original Message----- > From: Tracy Crook [SMTP:lors01@msn.com] > Sent: Friday, September 12, 2003 8:41 AM > To: Rotary motors in aircraft > Subject: [FlyRotary] Re: Turbos & EM2 Survey > > Really good discussion of 'real world' factors on aircraft turbocharging > for the past few days. > > Rusty's brief comment about fuel burn on boost is especially relevant. I > get frequent inquiries about reliability when running 'conservative' > manifold pressures of 30 - 40" Hg at cruise. The engine would probably > tollerate this but the ignored factor is fuel burn. A standard RV-3 (with > the original internal fuel tank) would have less than 1 hour endurance > when running at 40" MAP. At max power my RV-4 only has a 1.5 hour > endurance at sea level (30" MAP) and I don't have a turbo!. > > This is not an argument against turbos, in fact I may soon have 'turbo > envy' when these guys get them operational. There are reasons why a turbo > can be a good thing, just be sure you know what they are. > > But the real reason for this post is to get an idea of what size EM2 > display would have the highest demand. I'm ordering the parts for the > first production batch next week and software development is 99% complete. > > > The EM2 will be available in two different sizes but both have all the > same other features. The large format has a panel cutout width the same > size as a standard radio stack (6.2") with mounting flange out to 6.5". > Total heigth is 2.875" with a cutout heigth of 2.5". > > There are a lot of planes already out there with very little panel space > left so the smaller version would suit them better. The EM2-S measures > 4.7" wide x 2.55" tall with a panel cutout window of about 3.5" x 2".The > price for the smaller format is slightly lower but not enough to make that > a big factor. > > So, the question is, which would most pilots want? Any answer or guess is > welcome. > > Thanks to all for the encouragement (& patience!) on this project. > > Tracy > > PS: > For an example of what took so long, I just spent a week programming & > optimizing the damping factor for altimeter & VSI functions. Stuff like > this didn't even occure to me when I started. I saw the need when static > port pressure burbles due to turbulent airflow, wind gusts, etc would send > these readings all over the place. ------_=_NextPart_001_01C37945.D57B7C90 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable RE: [FlyRotary] Re: Turbos & EM2 Survey

Hi Tracy;
        The large display would certainly be my first choice. = The right side of my panel is now completely full with gauges and I = don't have half the info that the EM2 will give me. As soon as I = receive the EM2, most if not all of those will be removed and the large = EM2 will probably look a little lonely.

        I would guess that most of the side-by-side pilots would = prefer large displays, while the tandem pilots will opt for the smaller = version.

        Just my $.02, thanks for asking

S. Todd Bartrim
Turbo 13B
RX-9endurance
C-FSTB
http://www3.telus.net/haywire/RV-9/C-FSTB.htm

        "Imagination is more important than = knowledge"
        =         =         =         =         -Albert Einstein


    -----Original Message-----
    From:   Tracy Crook [SMTP:lors01@msn.com]
    Sent:   Friday, September 12, 2003 8:41 AM
    To:     Rotary motors in aircraft
    Subject:       = [FlyRotary] Re: Turbos & EM2 = Survey

    Really good discussion of 'real world' = factors on aircraft turbocharging for the past few days.=A0=A0=20
    =A0
    Rusty's brief comment about fuel burn = on boost is especially relevant.=A0 I get frequent inquiries about = reliability when running 'conservative' manifold pressures of 30 - = 40" Hg at cruise.=A0=A0 The engine=A0would probably=A0tollerate = this but the ignored factor is fuel burn.=A0 A standard RV-3 (with the = original internal fuel tank) would have less than 1 hour=A0endurance = when running at 40" MAP.=A0 At=A0max=A0power my RV-4=A0=A0only has = a 1.5 hour endurance at sea level=A0(30" MAP)=A0and I don't have a = turbo!.=A0=A0=A0

    =A0
    This is not an argument against = turbos, in fact I may soon have 'turbo envy'=A0 when these guys get = them operational.=A0There are reasons why a turbo can be a good thing, = just be sure you know what they are.

    =A0
    But the real reason for this post is = to get an idea=A0of what size EM2 display would have the highest = demand.=A0 I'm ordering the parts for the first production batch next = week and software development is 99% complete.=A0=A0

    =A0
    The EM2 will be available in two = different sizes but both have all the same other features.=A0 The large = format has a=A0panel cutout width=A0the same size as a standard radio = stack=A0 (6.2") with mounting flange out to 6.5".=A0=A0 Total = heigth is 2.875"=A0 with a cutout=A0heigth of = 2.5".

    =A0
    There are a lot of planes already out = there with very little panel space left so the smaller version would = suit them better.=A0 The EM2-S measures 4.7" wide x 2.55" = tall with a panel cutout window of about 3.5" x 2".The price = for the smaller format is slightly lower but not enough to make that a = big factor.

    =A0
    So, the question is, which would most = pilots want?=A0 Any answer or=A0guess is welcome.=A0=20
    =A0
    Thanks to all for the encouragement = (& patience!) on this project.
    =A0
    Tracy
    =A0
    PS:
    For an example of =A0what took so = long, I just spent a week=A0programming &=A0optimizing the damping = factor for altimeter & VSI functions.=A0 Stuff like this didn't = even occure to me when I started.=A0 I saw the need when static port = pressure burbles due to turbulent airflow, wind gusts, etc would send = these readings all over the place.=A0

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