X-Junk-Score: 0 [] X-Cloudmark-Score: 0 [] X-Cloudmark-Analysis: v=2.3 cv=BpPjPrf5 c=1 sm=1 tr=0 a=gMGr4lyxlQA5Ykn/f41syg==:117 a=jpOVt7BSZ2e4Z31A5e1TngXxSK0=:19 a=Jdjhy38mL1oA:10 a=T8OIu21NfXMA:10 a=on22okXAAAAA:8 a=Ia-xEzejAAAA:8 a=pGLkceISAAAA:8 a=7g1VtSJxAAAA:8 a=gUhp6s4mzH-klhYtVW0A:9 a=QEXdDO2ut3YA:10 a=Py9Ta2HYjrcA:10 a=NALRNPPH8BMA:10 a=Qa1je4BO31QA:10 a=gvSQh4r-fQ0A:10 a=IH66bu3t8jwLcmbW:21 a=_W_S_7VecoQA:10 a=NPqpj5bUEVj9vR1HIonK:22 a=Urk15JJjZg1Xo0ryW_k8:22 a=grOzbf7U_OpcSX4AJOnl:22 From: "Ernest Christley echristley@att.net" Received: from sonic307-11.consmr.mail.gq1.yahoo.com ([98.137.64.35] verified) by logan.com (CommuniGate Pro SMTP 6.2.14) with ESMTPS id 13408004 for flyrotary@lancaironline.net; Mon, 20 Jan 2020 17:21:00 -0500 Received-SPF: none receiver=logan.com; client-ip=98.137.64.35; envelope-from=echristley@att.net DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=att.net; s=s1024; t=1579558843; bh=W9w+gOwmsakPRzkjDtJKhRyiJkMUuVOcMyEdLQCPPvc=; h=Date:From:To:In-Reply-To:References:Subject:From:Subject; b=L5NM/fQmUjgLszKSMlvybG4DfconJm8JWyYL4eBppMp1YTGF1IS5NAYV/D2etpOM2s0YUR9u392mQaAbxkDCn6ZhtDWQscvf3oqllJudCv+UPGLATZdj+PaJ0QHZAtv4gJruLZNc3bPGkoonzp2eQru9Q+qRH8tqaPPO237F7kY= X-YMail-OSG: SzjbL4kVM1nW.9wzWmX9UafDoUlFe_a7myMRO.mrbgt861zstn.whY7j2lx3q4W RhUat5uisgI3FpuEwqF4XY1sOj5nQa.69Qvms_id_DmEpdve._QZwfVWV9sm0egqvB9EIhVmmbMX T4FPTEljvsKZGIbi0Ath8pZa4ntR9DcB2n133eRIbwLQA37QK0UFapVcIj1yRNe48ISb0LJnv2q6 f8YmY5OSs4H9oA_WyujrNlteMA_vfwlkGbKR_15.qgRBGF10zS6hfXPiasTIpRdnNXssyDu522VS oAhpgcDsv1udbEZl9VQr9lGWbDPqYhl6zTmOc8bF0Xi_TZJ0tpScXi8.yzi53_BWU.5XfzmOGKUr Qs5lN5rz.LTQCzA2xlltIzLtzgAj3N0sfKcfdGQAzTnpJ6mBjZtffiem3HwesgUqJ14yAijR33pv GgR5dQsvS4Iyn1jRvXJt3AGQdfmEtR6eLIqZNaekRDIeHzt0qn5SfcoAEvVXlAUAnbHic2zOkV17 YBFa8MI3IqZRMuLQ_X9qHQAstu3d1mMg79kdUZiLBJNVHN4roMckjSshImSHIvz0aAFp3KYbj5ex .pTiptsRXur_4k.jo3IssD62ORSbgHcR62Eb9zoDexjs1h98l.JvyfJmYlYhKKPfEHhkZqKKyLX6 pWS45VabkR1Bcojg54TuDzrDIebyABb8yRTF1wW_0wT0i5mxWV3EhBZiv6pADyeGXXuUznPvzAQI 8uKu3OtkNf.2JHWLkXDdV1QVi_AKEuXZU14ag22AE_NxyR8D8Kh7NahnqrdgW7JfdlLXE_Gf.GzB 39j_MnPZ4h22g4LU90sCbMI1pXg.N_RYxiSukXeQGO40kueHc_.VJ31HAysYxWKPQy7Xml8MzFgv 7jgJGck0GTid1Ckar1eRddfu0huNQfmaHH1SxouQpzUpnqiceS63LNitW3dlpcBODsjkIesWrteR KwQJKaL4EMScd71IsXle9rMyDqNs9erJqfUsGH1kf4brJkPtKjCdeZ7aeqTpxwLeIW9akbzRak2b cFUr8FXcVNJlqYPPLeqwdXT7BJqNiQbsfqSmjhB1l2PLdBitc7nz36ybNW7JlmuE0Iryij3nO9hp Z9X1Ei_oBCOKrzemqPZH8TcOOO8QKS_AR9zZWKFZYN4tA..l23pr5XEtpKnnSjrSzbPxW6Yj2brX .GyBcUnZPGEivQjv.vPo1JftWgVrc4g1E.vbTnxEVdTin5PMI.jPGmz9sGox5DTdx2qft2JJjesR vhk_teNAebh.SdhOlPBNZqZKM1wfV7z0pDzlj.60w5sECvXJJR1Dr4_qVd2opDdTrTvvVJ3st Received: from sonic.gate.mail.ne1.yahoo.com by sonic307.consmr.mail.gq1.yahoo.com with HTTP; Mon, 20 Jan 2020 22:20:43 +0000 Date: Mon, 20 Jan 2020 22:20:37 +0000 (UTC) To: "Jeff Whaley jwhaley@datacast.com" Message-ID: <864682333.16644313.1579558837983@mail.yahoo.com> In-Reply-To: References: Subject: Re: [FlyRotary] Re: Fuel System Design for High wing Aircraft MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_Part_16644312_1041511214.1579558837982" X-Mailer: WebService/1.1.14873 YMailNorrin Mozilla/5.0 (Macintosh; Intel Mac OS X 10.13; rv:72.0) Gecko/20100101 Firefox/72.0 Content-Length: 8746 ------=_Part_16644312_1041511214.1579558837982 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: quoted-printable Does the fuel necessarily have to be returned?=C2=A0 What is the benefit o= f returning it?=C2=A0 Injectors can take 50lbs of pressure.=C2=A0 In fact, = they make a better spray with the higher pressure, and atomize even better = if the fuel is sprayed hot.=C2=A0 Many modern cars don't have a return.=C2= =A0 As long as you keep the pumps=C2=A0 and the gas going to them cool, you= won't get vapor lock.=C2=A0=20 Keep the fuel pump below the injectors and behind the firewall.=C2=A0 It'll= draw cool fuel and then pressurize it to keep it liquid until it is spraye= d.=C2=A0 On shutdown, the fuel in the line firewall forward will get hot an= d vaporize, pushing liquid back to the pump.=C2=A0 But, as soon as the pump= is flipped on the vapor gets compressed and liquified again for the rest o= f its time in the line. I could be wrong. . .=20 On Monday, January 20, 2020, 10:43:07 AM EST, Jeff Whaley jwhaley@datac= ast.com wrote: =20 =20 Hi Bobby, yes Ed used a small (1 qt) can attached to the engine-side of th= e firewall, to accept main fuel IN, return fuel and parallel outputs to his= fuel pumps.=C2=A0 This system would work regardless of wing arrangement bu= t I'm not too sure how it performed at keeping LOW fuel temperatures. My high-wing has a 2 gallon header tank on the cabin-side of the firewall, = so I Tee'd my fuel return into one of its two vent lines that connect back = to the wing tanks.=C2=A0 This is a gravity-fed system until it passes throu= gh the firewall to the pumps ... the vent lines assist in draining the tank= s evenly.=20 Jeff=20 What is the best method for handling return fuel in a high wing? Fuel retur= n to a small header tank sized to keep fuel temperatures low? I think Ed An= derson may have used a small header in his RV6. Asking for a friend with an airplane addiction. Bobby -----Original Message----- From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net]=20 Sent: January-20-20 6:01 AM To: Rotary motors in aircraft Subject: flyrotary Digest #4865 =C2=A0 =C2=A0 =C2=A0 =C2=A0 Rotary motors in aircraft Digest #4865 1) Re: Mufflers =C2=A0 =C2=A0 by "Neil Unger 12348ung@gmail.com" 2) Re: Mufflers =C2=A0 =C2=A0 by "Charlie England ceengland7@gmail.com" This digest is sent to you because you are subscribed to =C2=A0 the mailing list . To unsubscribe, E-mail to: To switch to t= he FEED mode, E-mail to Send administrative queries to=C2=A0 -- Homepage:=C2=A0 http://www.flyrotary.com/ Archive and UnSub:=C2=A0 http://mail.lancaironline.net:81/lists/flyrotary/L= ist.html =20 ------=_Part_16644312_1041511214.1579558837982 Content-Type: text/html; charset=UTF-8 Content-Transfer-Encoding: quoted-printable
Does the fuel necessarily ha= ve to be returned?  What is the benefit of returning it?  Injecto= rs can take 50lbs of pressure.  In fact, they make a better spray with= the higher pressure, and atomize even better if the fuel is sprayed hot.&n= bsp; Many modern cars don't have a return.  As long as you keep the pu= mps  and the gas going to them cool, you won't get vapor lock.  <= br>

Keep the fuel pump below the injectors and behind the= firewall.  It'll draw cool fuel and then pressurize it to keep it liq= uid until it is sprayed.  On shutdown, the fuel in the line firewall f= orward will get hot and vaporize, pushing liquid back to the pump.  Bu= t, as soon as the pump is flipped on the vapor gets compressed and liquifie= d again for the rest of its time in the line.

I could be = wrong. . .

=20
=20
On Monday, January 20, 2020, 10:43:07 AM EST, Jeff Whal= ey jwhaley@datacast.com <flyrotary@lancaironline.net> wrote:


Hi Bobby, yes Ed used a small (1 qt) = can attached to the engine-side of the firewall, to accept main fuel IN, re= turn fuel and parallel outputs to his fuel pumps.  This system would w= ork regardless of wing arrangement but I'm not too sure how it performed at= keeping LOW fuel temperatures.

My high-wing has a 2 gallon header tank on the cabin-side of the = firewall, so I Tee'd my fuel return into one of its two vent lines that con= nect back to the wing tanks.  This is a gravity-fed system until it pa= sses through the firewall to the pumps ... the vent lines assist in drainin= g the tanks evenly.
Jeff

What is the best method for handling return = fuel in a high wing? Fuel return to a small header tank sized to keep fuel = temperatures low? I think Ed Anderson may have used a small header in his R= V6.

Asking for a frien= d with an airplane addiction.

Bobby

-----Or= iginal Message-----
From: Rotary motors in aircra= ft [mailto:flyrotary@lancaironline.net]
Sent: January-20-20 6:01 AM
To: Ro= tary motors in aircraft
Subject: flyrotary Digest= #4865

    &= nbsp;   Rotary motors in aircraft Digest #4865

1) Re: Mufflers
2) Re: Muffl= ers

This digest is se= nt to you because you are subscribed to
  th= e mailing list <flyrotary@lancaironline.net>= .
To unsubscribe, E-mail to: <flyrotary-off@lancaironline.net> To switch to the FEED mo= de, E-mail to <flyrotary-feed@lancaironline= .net>
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