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 5.3.10) with ESMTPS id 4576606 for flyrotary@lancaironline.net; Fri, 12 Nov 2010 10:47:34 -0500 Received-SPF: none receiver=logan.com; client-ip=129.72.10.31; envelope-from=SBoese@uwyo.edu Received: from ponyexpress-ht2.uwyo.edu (ponyexpress-ht2.uwyo.edu [10.84.60.209]) by willowsprings.uwyo.edu (8.14.4/8.14.4) with ESMTP id oACFka6M022584 (version=TLSv1/SSLv3 cipher=AES128-SHA bits=128 verify=FAIL) for ; Fri, 12 Nov 2010 08:46:55 -0700 (MST) (envelope-from SBoese@uwyo.edu) Received: from ponyexpress-mb5.uwyo.edu ([fe80::9813:248c:2d68:a28b]) by ponyexpress-ht2 ([10.84.60.209]) with mapi; Fri, 12 Nov 2010 08:46:53 -0700 From: "Steven W. Boese" To: Rotary motors in aircraft Date: Fri, 12 Nov 2010 08:46:50 -0700 Subject: fuel flow Thread-Topic: fuel flow Thread-Index: AcuCgNH7AywYQz/wQbe60v21fnyFFA== Message-ID: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: yes X-MS-TNEF-Correlator: acceptlanguage: en-US Content-Type: multipart/related; boundary="_005_E1AA3B1AF41D8049B1E3FBD5E225626004E4FBBD6Dponyexpressmb_"; type="multipart/alternative" MIME-Version: 1.0 --_005_E1AA3B1AF41D8049B1E3FBD5E225626004E4FBBD6Dponyexpressmb_ Content-Type: multipart/alternative; boundary="_000_E1AA3B1AF41D8049B1E3FBD5E225626004E4FBBD6Dponyexpressmb_" --_000_E1AA3B1AF41D8049B1E3FBD5E225626004E4FBBD6Dponyexpressmb_ Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Brian, Rather than suggesting that you check for the possibility of insufficient f= uel flow by observing the fuel pressure during a future flight, it was hope= d that your either had looked at the fuel pressure at the time or have a re= cord that you could review. It should be possible to check the fuel flow rate by disconnecting the retu= rn line from the fuel pressure regulator and measuring the amount of fuel d= elivered from that line in a known time period. This could be done on the = ground with minimal risk as long as precautions for dealing with the flamma= ble fuel are taken. In my previous message, I meant to say: The fuel flow rate indication from = the EM2 probably wouldn't be very useful for checking on this. Steve Boese From: bktrub@aol.com Subject: Re: [FlyRotary] Re: Improved performance of my new (2009) intake manifold Date: Thu, 11 Nov 2010 16:05:58 -0500 To: flyrotary@lancaironline.net [cid:image001.gif@01CB8244.E6406D00] [cid:image002.gif@01CB8244.E6406D00] Good point, I'll check. That would seem to make sense. I do have two fuel p= umps, and a huge filter/ moisture separater the size of an oil filter. I'll= put a fuel pressure check on my things to check in flight. Brian Trubee -----Original Message----- From: Steven W. Boese To: Rotary motors in aircraft Sent: Thu, Nov 11, 2010 12:23 pm Subject: [FlyRotary] Re: Improved performance of my new (2009) intake manif= old Brian, If the problem occurs only after the system starts using all the injectors,= insufficient flow capacity of the primary injectors should not be the caus= e. The flow required of them is now significantly less than it was when onl= y the primaries were in use. In flight, the total fuel requirement would b= e larger at the same MAP as on the ground since the RPM is greater (assumin= g a fixed pitch prop). So it might be good to check for something limiting= the total fuel flow. The fuel filter would be one thing that comes to min= d. Did you happen to notice the fuel pressure before and after the problem= shows up? The fuel flow rate indication from the EC2 probably wouldn't be= very useful for checking on this. Steve Boese --_000_E1AA3B1AF41D8049B1E3FBD5E225626004E4FBBD6Dponyexpressmb_ Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable

Brian,

 

Rather than suggesting that you check for the possibility of= insufficient fuel flow by observing the fuel pressure during a future flig= ht, it was hoped that your either had looked at the fuel pressure at the ti= me or have a record that you could review.

 

It should be= possible to check the fuel flow rate by disconnecting the return line from= the fuel pressure regulator and measuring the amount of fuel delivered fro= m that line in a known time period.  This could be done on the ground = with minimal risk as long as precautions for dealing with the flammable fue= l are taken.

 <= /span>

In my previous message, I meant to say: T= he fuel flow rate indication from the EM2 probably wouldn’t be= very useful for checking on this.

 

Steve Bo= ese

  

From:

bktrub@aol.com

Subje= ct:

Re: [FlyRotary] Re: Improved performance of my new (2009) int= ake manifold

Date:

Thu, 11 Nov 2010 16:05:58= -0500

To:

flyrotary@lancaironline.net

=3D"Message

3D"Undecoded

Good point, I'll check. That would s= eem to make sense. I do have two fuel pumps, and a huge filter/ moisture se= parater the size of an oil filter. I'll put a fuel pressure check on my thi= ngs to check in flight.

 = ;

= Brian Trubee

 

-----Original Message-----
From: Steven W. Boes= e <SBoese@uwyo.edu>
To: Rotary motors in aircraft <flyrotary@la= ncaironline.net>
Sent: Thu, Nov 11, 2010 12:23 pm
Subject: [FlyRot= ary] Re: Improved performance of my new (2009) intake manifold

Brian,

 

If the proble= m occurs only after the system starts using all the injectors, insufficient= flow capacity of the primary injectors should not be the cause. The flow r= equired of them is now significantly less than it was when only the primari= es were in use.  In flight, the total fuel requirement would be larger= at the same MAP as on the ground since the RPM is greater (assuming a fixe= d pitch prop).  So it might be good to check for something limiting th= e total fuel flow.  The fuel filter would be one thing that comes to m= ind.  Did you happen to notice the fuel pressure before and after the = problem shows up?  The fuel flow rate indication from the EC2 probably= wouldn’t be very useful for checking on this.

<= p class=3DMsoNormal> 

= Steve Boese

 

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