Return-Path: Sender: "Marvin Kaye" To: lml@lancaironline.net Date: Fri, 11 Mar 2005 13:31:56 -0500 Message-ID: X-Original-Return-Path: Received: from imo-d22.mx.aol.com ([205.188.144.208] verified) by logan.com (CommuniGate Pro SMTP 4.3c2) with ESMTP id 779662 for lml@lancaironline.net; Fri, 11 Mar 2005 11:09:22 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.188.144.208; envelope-from=Sky2high@aol.com Received: from Sky2high@aol.com by imo-d22.mx.aol.com (mail_out_v37_r3.8.) id q.2b.6eaa87f6 (3310) for ; Fri, 11 Mar 2005 11:08:32 -0500 (EST) From: Sky2high@aol.com X-Original-Message-ID: <2b.6eaa87f6.2f631c80@aol.com> X-Original-Date: Fri, 11 Mar 2005 11:08:32 EST Subject: Re: [LML] Re: Walter - Target EGT query X-Original-To: lml@lancaironline.net MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="-----------------------------1110557312" X-Mailer: 9.0 Security Edition for Windows sub 5000 -------------------------------1110557312 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en =20 In a message dated 3/11/2005 9:01:50 A.M. Central Standard Time, =20 marv@lancaironline.net writes: 1400 F on an IO-3anything (20) with normal timing - - early in a climb from= =20 a near sea level departure is not nearly rich enough at WOT full power. The 700=E2=80=99 MSL value does not change it much. 1290F is not conservative. It is getting close to normal. You really wan= t to be somewhere between 200 and 300 ROP at full power. What is your fuel flow during these exercises? If you cannot calculate an estimated BSFC above 0.58 lbs/hr/hp, it is probably not rich enough. 0.60 would be =E2=80=9Cnice=E2=80=9D. George, =20 Arrrrgh................ I don't know what the HP is - It has been my =20 question for years. Is there a conversion of gallons to pounds based on =20 temperature? Ok, if it is 160 HP (even at 1000 feet) at 15.4 Gallons per h= r. then, at=20 the inaccurate 6 pounds per gallon, that BSFC is .5775. Maybe I should fly= =20 at some LOP setting, get the fuel flow and back calculate the HP from the f= uel=20 flow.=20 =20 Hmmmm, I don't see 1400F on a climb. You must be commenting on Lorn's O-32= 0=20 operation. I see a peak EGT of 1420F-1430F for cyl #4 at 6500 MSLin level=20 flight, 176-180 KIAS, 2500 RPM - then leaned to 1300F-1310F (other cyls are= =20 1290-1300) where I see 10.3 to 10.5 GPH. =20 I don't remember the peak, but at level flight, 20C OAT, 2000 MSL, 2700 RPM= ,=20 WOT, EGTs around 1300F, CHTs about 360F, 190+ KIAS, 13.5 to 14 GPH. I don'= t=20 think that was quite at full rich????? =20 I don't have enough hands, eyes or brains to find peaks early in a climb ou= t=20 or remember the fuel flows until everything is settled down a bit.. =20 On the take off run , I will see 15.2-15.4 GPH (EGT 1290), climb out at 260= 0=20 RPM, WOT, EGT at 1290 on cyl# 4 (the highest EGT, others are 10-20 degrees =20 less) the fuel flow is reducing (of course). So, the climb out is not quit= e=20 at full power because of the RPM reduction to 2600. =20 OK, my question is answered. I will target Cyl #4 EGT at 1280F, RPM at 260= 0=20 once in climb over 700 feet AGL and the other three will be 10-20 degrees=20 cooler, #4 is where I leave my monitor set. =20 Thanks, =20 Scott Krueger AKA Grayhawk Lancair N92EX IO320 SB 89/96 Aurora, IL (KARR) Fair and Balanced Opinions at No Charge! Metaphysical Monologues used at your own Risk. -------------------------------1110557312 Content-Type: text/html; charset="UTF-8" Content-Transfer-Encoding: quoted-printable Content-Language: en

In a message dated 3/11/2005 9:01:50 A.M. Central Standard Time,=20 marv@lancaironline.net writes:

<= FONT=20 style=3D"BACKGROUND-COLOR: transparent" face=3DArial color=3D#000000 size= =3D2>1400 F=20 on an IO-3anything (20) with normal timing - - early in a climb from=20
a
near sea level departure is not nearly rich enough at WOT f= ull=20 power.

The 700=E2=80=99 MSL value does not change it=20 much.

1290F is not conservative. It is getting=20 close to normal. You really want
to be somewhere between 20= 0=20 and 300 ROP at full power.

What is your fuel flow dur= ing=20 these exercises?

If you cannot calculate an =20 estimated BSFC above 0.58 lbs/hr/hp, it is
probably not rich=20 enough. 0.60 would be =E2=80=9Cnice=E2=80=9D.
=20

George,

Arrrrgh................ I don't know what the HP is - It has been= my=20 question for years. Is there a conversion of gallons to pounds based o= n=20 temperature? Ok, if it is 160 HP (even at 1000 feet) at 15.4 Gall= ons=20 per hr. then, at the inaccurate 6 pounds per gallon, that BSFC=20 is .5775. Maybe I should fly at some LOP setting, get t= he=20 fuel flow and back calculate the HP from the fuel flow.

Hmmmm, I don't see 1400F on a climb. You must be commenting on Lo= rn's=20 O-320 operation. I see a peak EGT of 1420F-1430F for cyl #4 at 65= 00=20 MSLin level flight, 176-180 KIAS, 2500 RPM - then leaned to 1300F-1310F (oth= er=20 cyls are 1290-1300) where I see 10.3 to 10.5 GPH.

I don't remember the peak, but at level flight, 20C OAT, 2000= =20 MSL, 2700 RPM, WOT, EGTs around 1300F, CHTs about 360F, 190+ KIAS, 13.5 to 1= 4=20 GPH. I don't think that was quite at full rich?????

I don't have enough hands, eyes or brains to find peaks early in a= =20 climb out or remember the fuel flows until everything is settled down a=20 bit..

On the take off run , I will see 15.2-15.4 GPH (EGT 1290), climb out at= =20 2600 RPM, WOT, EGT at 1290 on cyl# 4 (the highest EGT, others are 10-20 degr= ees=20 less) the fuel flow is reducing (of course). So, the climb out is not=20 quite at full power because of the RPM reduction to 2600.

OK, my question is answered. I will target Cyl #4 EGT at 1280F, R= PM=20 at 2600 once in climb over 700 feet AGL and the other three will be 10-= 20=20 degrees cooler, #4 is where I leave my monitor set.

Thanks,

Scott Krueger=20 AKA Grayhawk
Lancair N92EX IO320 SB 89/96
Aurora, IL (KARR)

Fai= r=20 and Balanced Opinions at No Charge!
Metaphysical Monologues used at your=20= own=20 Risk.

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