X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from willowsprings.uwyo.edu ([129.72.10.31] verified) by logan.com (CommuniGate Pro SMTP 6.0c2) with ESMTPS id 5865723 for flyrotary@lancaironline.net; Tue, 06 Nov 2012 20:53:17 -0500 Received-SPF: none receiver=logan.com; client-ip=129.72.10.31; envelope-from=SBoese@uwyo.edu Received: from ponyexpress-ht5.uwyo.edu (extlb.uwyo.edu [172.26.4.4]) by willowsprings.uwyo.edu (8.14.4/8.14.4) with ESMTP id qA71qcUC010291 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Tue, 6 Nov 2012 18:52:42 -0700 (MST) (envelope-from SBoese@uwyo.edu) Received: from ponyexpress-hb1.uwyo.edu (10.84.66.35) by ponyexpress-ht5.uwyo.edu (10.84.66.28) with Microsoft SMTP Server (TLS) id 14.2.318.1; Tue, 6 Nov 2012 18:52:41 -0700 Received: from ponyexpress-m10.uwyo.edu ([fe80::60dd:cb9e:6f71:3d48]) by ponyexpress-hb1.uwyo.edu ([fe80::bc1d:430c:f399:767d%13]) with mapi id 14.02.0318.004; Tue, 6 Nov 2012 18:52:41 -0700 From: "Steven W. Boese" To: Rotary motors in aircraft Subject: RE: [FlyRotary] Re: Renesis CAS & EC-2 upgrade? Thread-Topic: [FlyRotary] Re: Renesis CAS & EC-2 upgrade? Thread-Index: AQHNvIT3y0dsX2/af0qoBoUzVThtsJfdmrqx Date: Wed, 7 Nov 2012 01:52:41 +0000 Message-ID: <3E8191F276108F4481AB0721BBA9269E05DEF427@ponyexpress-m10.uwyo.edu> References: In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: x-originating-ip: [75.196.151.152] Content-Type: multipart/alternative; boundary="_000_3E8191F276108F4481AB0721BBA9269E05DEF427ponyexpressm10u_" MIME-Version: 1.0 --_000_3E8191F276108F4481AB0721BBA9269E05DEF427ponyexpressm10u_ Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Bobby, Not wanting to make any changes to the controller, the resistors were added= to the wiring harness at the CAS end. So the path to ground was unchanged= . Thanks for the suggestion. Steve ________________________________ From: Rotary motors in aircraft [flyrotary@lancaironline.net] on behalf of = Bobby J. Hughes [bhughes@qnsi.net] Sent: Tuesday, November 06, 2012 6:11 PM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Renesis CAS & EC-2 upgrade? Floating ground? Sent from my iPad On Nov 6, 2012, at 6:52 PM, "Steven W. Boese" > wrote: A follow-up on the attempt to use Renesis CAS with an EC2 controller set up= for '86 stock Mazda CAS. There appeared to be a correlation between loosing the rotor 2 controller s= ignals with crossing the staging threshold on startup. This was tested by = starting the engine with the throttle open sufficiently that the manifold p= ressure should not drop to less than the staging threshold. The result was= that the engine still ran only on rotor 1 until RPM reached at least 1400 = RPM. It just didn't take as long to reach this RPM as before. This behavi= or and examination of controller signals recorded during the startup dispro= ved the appearance of a correlation between loosing rotor 2 controller sign= als and staging. 1K ohm resistors were then added between each Renesis CAS signal and ground= . With these resistors installed, the engine started easily and ran normal= ly at all throttle settings. Since the engine was operated with this setup= for only a few minutes, it is unknown if this is a reliable solution. If = it isn't, it is certainly a step in the right direction. Plots of the CAS = signals with and without the 1K ohm resistors are attached. The voltage sc= ales on the two plots are the same, but voltages read from the plots must b= e multiplied by a factor of 3 to give absolute values in volts. Higher res= olution plots of the CAS signals are available on request. Any feedback on= why adding the resistors is effective would be welcome. Steve Boese RV6A, 1986 13B NA, RD1A, EC2 --_000_3E8191F276108F4481AB0721BBA9269E05DEF427ponyexpressm10u_ Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

Bobby,

 

Not wanting to make any changes to the controller, the resistors were ad= ded to the wiring harness at the CAS end.  So the path to ground was u= nchanged.  Thanks for the suggestion.

 

Steve

 

From: Rotary motors in aircraft [flyrotary= @lancaironline.net] on behalf of Bobby J. Hughes [bhughes@qnsi.net]
Sent: Tuesday, November 06, 2012 6:11 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Renesis CAS & EC-2 upgrade?

Floating ground? 

Sent from my iPad

On Nov 6, 2012, at 6:52 PM, "Steven W. Boese" <SBoese@uwyo.edu> wrote:

A follow-up on the attempt to use Renesis = ;CAS with an EC2 controller = set up for '86 stock Mazda CAS. 

 

There appeared to be a correlation between loosing the rotor 2 controlle= r signals with crossing the staging threshold on startup.  This was te= sted by starting the engine with the throttle open sufficiently that the ma= nifold pressure should not drop to less than the staging threshold.  The result was that the engine still ran= only on rotor 1 until RPM reached at least 1400 RPM.  It just didn't = take as long to reach this RPM as before.  This behavior and exam= ination of controller signals recorded during the startup disproved the appearance of a correlation between loosing rotor 2&nbs= p;controller signals and staging.

 

1K ohm resistors were then added between each Re= nesis CAS signal and ground.  With th= ese resistors installed, the engine started easily and ran normally at all = throttle settings.  Since the engine was operated with this setup for only a few minutes, it is unknown if this is a reliable sol= ution.  If it isn't, it is certainly a step in the right direction.&nb= sp; Plots of the CAS signals with and without the 1= K ohm resistors are attached.  The voltage scales on the two plots are the same, but voltages read from the plot= s must be multiplied by a factor of 3 to give absolute values in volts= .  Higher resolution plots of the CAS signals are available on request.  Any feedback on why adding the resistors is effective would be welcome.

 

Steve Boese
RV6A, 1986 13B NA, RD1A<= /a>, EC2


 

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