Return-Path: <13brv3@bellsouth.net> Received: from imf23aec.mail.bellsouth.net ([205.152.59.71] verified) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 378650 for flyrotary@lancaironline.net; Wed, 25 Aug 2004 22:49:29 -0400 Received-SPF: pass receiver=logan.com; client-ip=205.152.59.71; envelope-from=13brv3@bellsouth.net Received: from rd ([65.6.194.9]) by imf23aec.mail.bellsouth.net (InterMail vM.5.01.06.08 201-253-122-130-108-20031117) with ESMTP id <20040826024854.XNRJ1796.imf23aec.mail.bellsouth.net@rd> for ; Wed, 25 Aug 2004 22:48:54 -0400 From: "Russell Duffy" <13brv3@bellsouth.net> To: "'Rotary motors in aircraft'" Subject: More rev-3 tests Date: Wed, 25 Aug 2004 21:49:04 -0500 Message-ID: <002701c48b17$4038cef0$6101a8c0@rd> MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0028_01C48AED.5762C6F0" X-Priority: 3 (Normal) X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook, Build 10.0.6626 Importance: Normal X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 This is a multi-part message in MIME format. ------=_NextPart_000_0028_01C48AED.5762C6F0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Greetings, =20 Attached is today's log. I think I'm on the right track, though if I = keep adding power, I'll need some more oil cooling. Water is fine, but oil = is getting up there fast. =20 =20 BTW, if you guys are getting tired of reading these, let me know. I = don't really wish to spam the group with this stuff if it's not of general interest. =20 =20 Cheers, Rusty (finally seeing potential) =20 =20 =20 =20 8-25-04 .4 hours / 30.1 total =20 Added a trim tab today on the rudder. The business end of it is about 7 inches tall, and 1.25 inches wide. I bent it about 30 degrees, and = found out that it's way too much. Now, instead of having the ball about half = way to the right, it's about 2/3 of the way to the left. Took out about = half the bend after the flight. =20 =20 Again, the takeoff was no problem. Once you get the tail up at low = power, it's easy to balance rudder with additional throttle. I may actually = end up leaving the mount like it is for the foreseeable future. =20 =20 After yesterday's tests, I decided to try flying the plane with the TB = open to the inside of the cowling. I did leave the old inlet tubes pointing = in the general direction of the TB, to at least give it some cooler air. = There is certainly no ram air pressure though. =20 =20 During the takeoff, I got a real sense of increased power. Climb out at = 130 mph was 6000 rpm, up from 5800 with the inlets connected, but still down from the 6200 that Tracy reported. MAP was only 26.5. =20 I could only play at 1400 ft today, and ran a couple flat out bursts of about 30 seconds each. TAS only showed 190, which I'm going to have to = test because I think it must be wrong. Map was 26 inches, and rpm was 6500. This is 300 rpm more than when I had the inlet connected, but probably = lower MAP. =20 =20 I think what I need now is an improved ram air inlet, that continues to = use the current air horns. I feel like this will be the key to getting the performance I hoped for, but unfortunately, I don't know if I'll be able = to do it without making a completely new scoop for just the TB. Naturally, = the most convenient place for that new scoop is on top of the cowl, similar = to what Tracy did before. I'm trying to resist, but I think it's almost inevitable at this point. I just don't have space to route a large = enough duct around the engine. =20 =20 Finally, I'm happy to report a significant reduction in my personal aft temperature with the new tailpipe. It was noticeably quieter as well. = Most importantly, I didn't smell exhaust once!!!=20 ------=_NextPart_000_0028_01C48AED.5762C6F0 Content-Type: text/html; charset="us-ascii" Content-Transfer-Encoding: quoted-printable Message
Greetings,
 
Attached is = today's=20 log.  I think I'm on the right track, though if I keep adding = power, I'll=20 need some more oil cooling.  Water is fine, but oil is getting up = there=20 fast. 
 
BTW, if you = guys are=20 getting tired of reading these, let me know.  I don't really wish = to spam=20 the group with this stuff if it's not of general interest. =20
 
Cheers,
Rusty (finally = seeing=20 potential)
 
 
 
 

8-25-04  .4 hours / 30.1 = total

 

Added = a trim tab=20 today on the rudder.  The = business=20 end of it is about 7 inches tall, and 1.25 inches wide.  I bent it about 30 degrees, = and found=20 out that it’s way too much.  Now,=20 instead of having the ball about half way to the right, it’s about = 2/3 of the=20 way to the left.  Took out = about=20 half the bend after the flight. =20

 

Again, = the takeoff=20 was no problem.  Once you = get the=20 tail up at low power, it’s easy to balance rudder with additional = throttle.  I may actually end up leaving = the mount=20 like it is for the foreseeable future. =20

 

After = yesterday’s=20 tests, I decided to try flying the plane with the TB open to the inside = of the=20 cowling.  I did leave the = old inlet=20 tubes pointing in the general direction of the TB, to at least give it = some=20 cooler air.  There is = certainly no=20 ram air pressure though. =20

 

During = the takeoff,=20 I got a real sense of increased power. =20 Climb out at 130 mph was 6000 rpm, up from 5800 with the inlets=20 connected, but still down from the 6200 that=20 Tracy reported.  MAP was only 26.5.

 

I = could only play at=20 1400 ft today, and ran a couple flat out bursts of about 30 seconds = each.  TAS only showed 190, which = I’m going to=20 have to test because I think it must be wrong.   Map was 26 inches, and rpm was = 6500.  This is 300 rpm more than when = I had the=20 inlet connected, but probably lower MAP. =20

 

I = think what I need=20 now is an improved ram air inlet, that continues to use the current air=20 horns.  I feel like this = will be the=20 key to getting the performance I hoped for, but unfortunately, I = don’t know if=20 I’ll be able to do it without making a completely new scoop for = just the=20 TB.  Naturally, the most = convenient=20 place for that new scoop is on top of the cowl, similar to what=20 Tracy did before.  I’m trying to resist, = but I think it’s=20 almost inevitable at this point.  = I=20 just don’t have space to route a large enough duct around the = engine. 

 

Finally, I’m happy=20 to report a significant reduction in my = personal aft=20 temperature with the new tailpipe. =20 It was noticeably quieter as well. =20 Most importantly, I didn’t smell exhaust once!!!=20

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