Return-Path: <13brv3@bellsouth.net> Received: from imf21aec.mail.bellsouth.net ([205.152.59.69] verified) by logan.com (CommuniGate Pro SMTP 4.2.5) with ESMTP id 493465 for flyrotary@lancaironline.net; Sun, 31 Oct 2004 19:11:44 -0500 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.69; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf21aec.mail.bellsouth.net (InterMail vM.5.01.06.11 201-253-122-130-111-20040605) with ESMTP id <20041101001114.PBDM2451.imf21aec.mail.bellsouth.net@rd> for ; Sun, 31 Oct 2004 19:11:14 -0500 From: "Russell Duffy" <13brv3@bellsouth.net> To: "Flyrotary List" Subject: Phase one complete, official climb results disappointing Date: Sun, 31 Oct 2004 18:09:24 -0600 Message-ID: <000001c4bfa7$0b5b8f50$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0001_01C4BF74.C0C11F50" 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_0001_01C4BF74.C0C11F50 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Greetings, =20 Posted below are the details of today's final phase one flight. I'm = truly at a loss to explain how I saw 3000 fpm yesterday, because I sure = couldn't do it today. I know I've seen 2500+ on a couple of occasions before, = but not today. Sorry to get everyone (particularly myself) overly excited = about the climb rate. I'm still not sure how I'm getting 500 fpm less than = Tracy, while running the same prop, and rpm. Oh well, the testing will never really end, which is what keeps it all interesting. =20 =20 Cheers, Rusty (grilling steak, and drinking beer now) =20 =20 =20 =20 10-31-04 1.9 hours / 40.0 total =20 I finished up the climb testing, and did some descent testing. Unfortunately, I must have been seeing things yesterday when I though I = saw 3000 rpm. Either that, or it was a bit of an extended zoom climb. The = real figure is 2222 fpm, which is almost depressing, but it was 85 degrees, = and I have full fuel, so I'm sure I can improve this with better conditions. = The goal is still 3000 fpm, but I'm wondering if I'll make it now. =20 =20 The main climb test was done at 4000 ft. I started at 3500, then established a climb at the designated speed. Once it was stabilized, = and I passed through 4000 ft, I recorded the reading from the VSI. This was = just to get an idea of the best ROC, without regard to the actual figure. =20 =20 Climb testing : mph / fps climb 90 / 2100 100 / 2200 110 / 2000 120 / 1900 130 / 1700 140 / 1400 =20 Since 100 mph was the best, I dropped to 1500 feet, established 100 mph = at full throttle climb, and timed how long it took to get from 2000 to 3000 feet. The average of a few runs was 27 seconds, which calculates to = 2222 fpm. If nothing else, it shows that my VSI is pretty accurate. =20 =20 I also did some descent rate testing around 3000 feet. Basically, I = went to idle, and noted the VSI descent rate at the following speeds. =20 Mph / fps descent=20 80 / 700 90 / 900 100 / 1100 =20 I had added a trim tab to the (new) rudder, and found that it wasn't = quite enough. It's amazing the power it has though. In high power cruise, I still need a little right rudder (added more trim after the flight), but = in descent testing, I had to add a bunch of left rudder to counteract the = trim tab. =20 =20 I also tried to un-squeeze the trailing edge of the new left aileron, to = try to correct a little left rolling motion that was aggravated when I = replaced the aileron. It may have been a little better, but it still took some = trim. After the flight, I gently squeezed the right aileron a little, so we'll = see if that helps more. =20 =20 Finally, this concludes the phase one testing. I had to circle around = the area for the last couple tenths to be legal, but it's done. The = airframe itself has behaved just as any RV should, and since I did fairly through airframe testing on my previous RV-8, I was able to get through the = testing of this plane fairly quickly. Just gotta love Van's RV's :-)=20 =20 Now that the official time is over, I plan to pull the cowl, and do some work on the oil temp scoop. I'm also going to vastly improve the TB air inlet that's in the right radiator duct. =20 ------=_NextPart_000_0001_01C4BF74.C0C11F50 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Greetings,
 
Posted below = are the=20 details of today's final phase one flight.  I'm truly at a loss to = explain=20 how I saw 3000 fpm yesterday, because I sure couldn't do it today.  = I know=20 I've seen 2500+ on a couple of occasions before, but not today.  = Sorry to=20 get everyone (particularly myself) overly excited about the climb = rate. =20 I'm still not sure how I'm getting 500 fpm less than Tracy, while = running the=20 same prop, and rpm.  Oh well, the testing will never really end, = which is=20 what keeps it all interesting. 
 
Cheers,
Rusty (grilling = steak, and=20 drinking beer now)
 
 
 
 

10-31-04  1.9 hours  / =20 40.0 total

 

I = finished up the=20 climb testing, and did some descent testing.  Unfortunately, I must have = been seeing=20 things yesterday when I though I saw 3000 rpm.  Either that, or it was a bit = of an=20 extended zoom climb.  The = real=20 figure is 2222 fpm, which is almost depressing, but it was 85 degrees, = and I=20 have full fuel, so I’m sure I can improve this with better = conditions.  The goal is still 3000 fpm, = but I’m=20 wondering if I’ll make it now. =20

 

The = main climb test=20 was done at 4000 ft.  I = started at=20 3500, then established a climb at the designated speed.  Once it was stabilized, and I = passed=20 through 4000 ft, I recorded the reading from the VSI.  This was just to get an idea = of the best=20 ROC, without regard to the actual figure. =20

 

Climb = testing :  mph  / =20 fps climb

  90 =20 /  2100

100  / =20 2200

110  / =20 2000

120  / =20 1900

130  / =20 1700

140  / =20 1400

 

Since = 100 mph was=20 the best, I dropped to 1500 feet, established 100 mph at full throttle = climb,=20 and timed how long it took to get from 2000 to 3000 feet.  The average of a few runs was = 27=20 seconds, which calculates to 2222 fpm. =20 If nothing else, it shows that my VSI is pretty accurate. 

 

I also = did some=20 descent rate testing around 3000 feet. =20 Basically, I went to idle, and noted the VSI descent rate at the=20 following speeds.

 

Mph  / =20 fps descent

  80 =20 /  700

  90 =20 /  900

100  / =20 1100

 

I had = added a trim=20 tab to the (new) rudder, and found that it wasn’t quite = enough.  It’s amazing the power = it has=20 though.  In high power = cruise, I=20 still need a little right rudder (added more trim after the flight), but = in=20 descent testing, I had to add a bunch of left rudder to counteract the = trim=20 tab. 

 

I also = tried to=20 un-squeeze the trailing edge of the new left aileron, to try to correct = a little=20 left rolling motion that was aggravated when I replaced the = aileron.  It may have been a little = better, but it=20 still took some trim.  = After the=20 flight, I gently squeezed the right aileron a little, so we’ll see = if that helps=20 more. 

 

Finally, this=20 concludes the phase one testing.  I=20 had to circle around the area for the last couple tenths to be legal, = but it’s=20 done.   The airframe itself has behaved = just as=20 any RV should, and since I did fairly through airframe testing on my = previous=20 RV-8, I was able to get through the testing of this plane fairly = quickly.    Just gotta love = Van’s RV’s :-)=20

 

Now = that the=20 official time is over, I plan to pull the cowl, and do some work on the = oil temp=20 scoop.  I’m also = going to vastly=20 improve the TB air inlet that’s in the right radiator duct.  =

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