Return-Path: <13brv3@bellsouth.net> Received: from imf16aec.mail.bellsouth.net ([205.152.59.64] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 546833 for flyrotary@lancaironline.net; Fri, 26 Nov 2004 18:59:57 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.64; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf16aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041126235926.NTHQ1980.imf16aec.mail.bellsouth.net@rd> for ; Fri, 26 Nov 2004 18:59:26 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "Flyrotary List" Subject: post Thanksgiving flight test report Date: Fri, 26 Nov 2004 17:59:44 -0600 Message-ID: <033a01c4d414$007af8b0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_033B_01C4D3E1.B5E088B0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.2180 This is a multi-part message in MIME format. ------=_NextPart_000_033B_01C4D3E1.B5E088B0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Greetings, =20 What follows is a brief flight test from today. As you can tell, it = wasn't the most thorough, or careful test. Sorry. I'll do better next time. = I suspect my EM-2 TAS is reading a bit more optimistically than Tracy's. =20 =20 Hope the St Elmo visit went OK. I didn't make it out to the hanger = until about 3:30pm, so obviously, I didn't make it for lunch. =20 =20 Cheers, Rusty =20 =20 =20 =20 =20 11-26-04 .6 hours / 40.6 total =20 Took a brief trip up to test the WOT speed at 8000 feet, and to test the = new oil cooler scoop, and TB inlet. The OAT was reading 58 when I went out, = so it was almost a "standard" day. This is the coldest temp that I've = started the engine, and it certainly acted differently. =20 =20 First, it took quite a bit more cranking than normal to fire it off, but that's too be expected. Once it starts, I always turn off the cold = start switch immediately, but leave the mixture full rich. Today, this worked fine, until I tried to throttle up to about 3000 to warm up. There just wasn't enough fuel to do it. I left it at about 2200 rpm, which was as = high as I could go with the mixture full rich. As the engine warmed up some, = you could see the mixture getting richer, and richer until it was basically = back to normal. Very odd. =20 =20 I tried the B controller and it faltered. Tried turning off the primary injectors, and it wasn't happy, ignition backfired. Basically, the = engine is just stubborn when cold. Once it was mostly warmed up, all was back = to normal, though I did get a bit of an rpm sag on climb out, which = required a bit more mixture to eliminate. Got my attention though. =20 =20 Speaking of warming up, it sure took a long time to get the oil temp = over 140. I was taking this to be a good sign for my oil cooler scoop mod, = but that hope was shattered in the air. Unfortunately, the oil temps are = still a problem. I made it to about 6000 feet before hitting 210, but it continued to climb, so I backed off the throttle and added speed. = During my WOT runs at 8000 feet, the temp eventually climbed to 220. Rats, gotta = do something about this. Let's see, how many times it Ed say he had to = change his oil cooler arrangement until he got it right :-) Water cooling continues to be more than adequate for any condition, and was only in = the 170 range during my WOT runs. During a long (rapid at times) descent = (I was playing), I noticed the oil at 138, and water was 105. Gotta keep = an eye on that too I guess. =20 =20 During climb, I was at 100-110 mph, and I saw sustained VSI readings of about 2500-2700 fpm. I made note of the RPM and MAP while climbing = through 4000 feet. RPM was 5850, and MAP was 24. I was running too rich = because I turned up the mixture after my sag during the initial climb out, so the = rpm was not what it normally would be (6200) , plus I should have recorded = it at a much lower altitude. Have I ever mentioned how nice it would be to = have datalogging (Tracy???). For an official climb rate, I descended to = 1000 ft, established a climb at 100 mph, and timed from 1500 to 2500. That = took 25 seconds, which calculates to 2400 fpm. Better, probably due to the cooler day, but still with full fuel. Probably with a light load of = fuel, and anytime other than right after Thanksgiving (overstuffed pilot), I = could get this over 2500 fpm pretty easily. For the time being, I'll be happy with this, and will worry more about the oil temp. =20 =20 I made a full throttle run at 8000 feet to compare with Tracy's numbers. The TAS figure is the EM-2 readout, which I believe to be a bit on the = high side. No reason to believe the fuel flow figure either, since I haven't verified it. Both have the default settings, so maybe they're = comparable with Tracy's readings (if he hasn't changed his). =20 Alt OAT surface RPM TAS GPH =20 Tracy 8000 69 7250 225 16 (best power mixture) Rusty 8000 58 6800 218 18.4 (mixture as set, forgot to set for best rpm) =20 Not sure yet what this all means, other than I was in a hurry and didn't take the time to fiddle with the mixture, etc. I still have some drag issues, since I'm missing the intersection fairings, and have yet to = clean up some of the other airframe messes. =20 =20 Finally, I only noted the MAP two times today. One was in climb at 4000 = ft, which was 24". The other was at 8000 ft WOT, and was 20.4. Using the = rule of 1" per 1000 ft, this puts me at 28" at sea level. This might be a = slight increase due to the new TB inlet, but overall, I'm not convinced it did = any good. ------=_NextPart_000_033B_01C4D3E1.B5E088B0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable Message
Greetings,
 
What follows = is a brief=20 flight test from today.  As you can tell, it wasn't the most = thorough, or=20 careful test.  Sorry.  I'll do better next time.  I = suspect my=20 EM-2 TAS is reading a bit more optimistically than Tracy's. =20
 
Hope the St = Elmo visit went=20 OK.  I didn't make it out to the hanger until about 3:30pm, so = obviously, I=20 didn't make it for lunch. 
 
Cheers,
Rusty
 
 
 

 

 

11-26-04  .6=20 hours  /  40.6 total

 

Took a brief trip up to test the WOT speed at = 8000 feet,=20 and to test the new oil cooler scoop, and TB inlet.  The OAT was reading 58 when I = went out,=20 so it was almost a “standard” day. =20 This is the coldest temp that I’ve started the engine, and = it certainly=20 acted differently. =20

 

First, it took quite a bit more cranking than = normal to=20 fire it off, but that’s too be expected. =20 Once it starts, I always turn off the cold start switch = immediately, but=20 leave the mixture full rich.  = Today,=20 this worked fine, until I tried to throttle up to about 3000 to warm = up.  There just wasn’t enough = fuel to do=20 it.  I left it at about = 2200 rpm,=20 which was as high as I could go with the mixture full rich.  As the engine warmed up some, = you could=20 see the mixture getting richer, and richer until it was basically back = to=20 normal.  Very odd. 

 

I tried the B controller and it faltered.  Tried turning off the primary = injectors,=20 and it wasn’t happy, ignition backfired. =20 Basically, the engine is just stubborn when cold.  Once it was mostly warmed up, = all was=20 back to normal, though I did get a bit of an rpm sag on climb out, which = required a bit more mixture to eliminate. =20 Got my attention though. =20

 

Speaking of warming up, it sure took a long = time to get=20 the oil temp over 140.  I = was taking=20 this to be a good sign for my oil cooler scoop mod, but that hope was = shattered=20 in the air.  = Unfortunately, the oil=20 temps are still a problem.  = I made=20 it to about 6000 feet before hitting 210, but it continued to climb, so = I backed=20 off the throttle and added speed. =20 During my WOT runs at 8000 feet, the temp eventually climbed to = 220.  Rats, gotta do something about = this.=20 Let’s see, how many times it Ed say he had to change his oil = cooler arrangement=20 until he got it right :-)   =20 Water cooling continues to be more than adequate for any = condition, and=20 was only in the 170 range during my WOT runs.   During a long (rapid at = times)=20 descent  (I was playing), = I noticed=20 the oil at 138, and water was 105. =20 Gotta keep an eye on that too I guess.  

 

During climb, I was at 100-110 mph, and I saw = sustained=20 VSI readings of about 2500-2700 fpm. =20 I made note of  the = RPM and=20 MAP while climbing through 4000 feet. =20 RPM was 5850, and MAP was 24. =20 I was running too rich because I turned up the mixture after my = sag=20 during the initial climb out, so the rpm was not what it normally would = be=20 (6200) , plus I should have recorded it at a much lower altitude.  Have I ever mentioned how nice = it would=20 be to have datalogging (Tracy???).   For an official climb = rate, I=20 descended to 1000 ft, established a climb at 100 mph, and timed from = 1500 to=20 2500.  That took 25 = seconds, which=20 calculates to 2400 fpm.  = Better,=20 probably due to the cooler day, but still with full fuel.  Probably with a light load of = fuel, and=20 anytime other than right after Thanksgiving (overstuffed pilot), I could = get=20 this over 2500 fpm pretty easily. =20 For the time being, I’ll be happy with this, and will worry = more about=20 the oil temp.  =

 

I made a full throttle run at 8000 feet to compare with=20 Tracy’s numbers.  The TAS figure is the EM-2 = readout,=20 which I believe to be a bit on the high side.  No reason to believe the fuel = flow=20 figure either, since I haven’t verified it.  Both have the default = settings, so maybe=20 they’re comparable with = Tracy’s=20 readings (if he hasn’t changed his).

 

Alt         =20 OAT surface        =20 RPM      =20 TAS       =20 GPH

 

Tracy      = 8000       =20 69           &nbs= p;            = ;   =20 7250       =20 225         =20 16      =20      = (best=20 power mixture)

Rusty    =20 8000       =20 58           &nbs= p;            = ;   =20 6800       =20 218         =20 18.4        =20 (mixture as set, forgot to set for best rpm)

 

Not sure yet what this all means, other than I = was in a=20 hurry and didn’t take the time to fiddle with the mixture, = etc.  I still have some drag issues, = since I’m=20 missing the intersection fairings, and have yet to clean up some of the = other=20 airframe messes.  =

 

Finally,=20 I only noted the MAP two times today. =20 One was in climb at 4000 ft, which was 24”.  The other was at 8000 ft WOT, = and was=20 20.4.  Using the rule of = 1” per 1000=20 ft, this puts me at 28” at sea level. =20 This might be a slight increase due to the new TB inlet, but = overall, I’m=20 not convinced it did any good.
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