X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from fed1rmfepo202.cox.net ([68.230.241.147] verified) by logan.com (CommuniGate Pro SMTP 5.4c3j) with ESMTP id 4952087 for flyrotary@lancaironline.net; Wed, 20 Apr 2011 11:13:31 -0400 Received-SPF: softfail receiver=logan.com; client-ip=68.230.241.147; envelope-from=glasair2@me.com Received: from fed1rmimpo03.cox.net ([70.169.32.75]) by fed1rmfepo202.cox.net (InterMail vM.8.01.04.00 201-2260-137-20101110) with ESMTP id <20110420151258.NKDY21362.fed1rmfepo202.cox.net@fed1rmimpo03.cox.net> for ; Wed, 20 Apr 2011 11:12:58 -0400 Received: from [192.168.2.201] ([70.177.24.126]) by fed1rmimpo03.cox.net with bizsmtp id ZrCx1g00K2jEC4N04rCxvq; Wed, 20 Apr 2011 11:12:57 -0400 X-CT-Score: NA X-Authority-Analysis: v=1.1 cv=hTXx1Er1pw82ZgGw8Hi28EyLmWoEdWD0ZP9EeNzTJ4I= c=1 sm=1 a=J_oHuY-yf3cA:10 a=f32ykCDtWUuHg+z19x9HKQ==:17 a=HHGDD-5mAAAA:8 a=Ia-xEzejAAAA:8 a=kLeNzARkYaSSSVzQrrcA:9 a=R_l4hsVWTbs2_DL-jaYA:7 a=wPNLvfGTeEIA:10 a=i1zE5R4R5dEA:10 a=EzXvWhQp4_cA:10 a=TXwF8rQSr0aO9d-qQiwA:9 a=nCGczVXAU9PbXW_9TFAA:7 a=f32ykCDtWUuHg+z19x9HKQ==:117 X-CM-Score: 0.00 Authentication-Results: cox.net; none From: Steve Thomas Mime-Version: 1.0 (Apple Message framework v1084) Content-Type: multipart/alternative; boundary=Apple-Mail-63-735146566 Subject: My Mistral Engine Status Date: Wed, 20 Apr 2011 08:12:57 -0700 In-Reply-To: To: Rotary motors in aircraft References: Message-Id: X-Mailer: Apple Mail (2.1084) --Apple-Mail-63-735146566 Content-Transfer-Encoding: quoted-printable Content-Type: text/plain; charset=iso-8859-1 Kelly, et. al., I now have over 50 hours of flight on My Mistral engine. There are = problems that I need to fix, but, the early results are good. Here is a = brief summary: 1. My oil temps are mostly under control. After many different fixes, = including adding air exit area, splitting the incoming air plenum to = force more air through the oil cooler, and increasing the size of my oil = plumbing, my cruising temps range from 195=BAF to 205=BAF. On a hot = day, the climb-out temps are still too high and I will be working on = that. Mistral uses the oil injection system, so, I burn about 1 qt. = every 5 to 6 hours. I'm using Idemitsu 20W-50 right now. 2. Water temps are 183=BAF. I cannot get it to go higher under any = circumstances. 3. At 50% power, my fuel flow is 11 GPH rich and 9GPH lean. I cannot = run much more power than that as the EGTs are too high. =20 4. My EGTs are still too high. I've been discussing this with the = chief engineer at Mistral, and the prognosis is that I have a partially = clogged injector. Since the fuel flows are calculated, they are = probably off. I'm told that I need a 10 micron filter. I have a 40 = micron now, but I'm told that isn't enough. =20 5. I believe that my air plenum scoop is too big. I've added a ton of = exit area, but I'm still pressurizing my cowl. Cooling should improve = if I cut down the scoop size. I'll be working on that. =20 6. The airplane is slow. I'm hoping that I can get better speeds once = I cut down on the air plenum scoop. =20 7. I'd also like to get my muffler in the cowl, but with the technology = currently available, I don't see how. Mufflers are just not there. = Mark Steitle is having good results with his DNA, but they have been = discontinued. I don't see anything out there that will do the job. The = tangential style mufflers are too power-robbing. SpinTec mufflers have = been recommended in the past, but their shapes are not very aerodynamic. = Anyone that might have a good suggestion, I'm listening. =20 Best Regards, Steve Thomas _______________________________________________________ On Apr 20, 2011, at 7:23 AM, Kelly Troyer wrote: > Steve, > =20 > Other than the muffler how is your ship and its complete "Mistral" = firewall forward installation > doing ?..................Are your cooling systems doing the job and is = the Mistral "FADEC" single > lever fuel and ignition ECU keeping the EGT under control = ?............I am sure the Rotary group > would be interested in hearing some of your numbers such as fuel flow, = EGT, oil and coolant > temps, etc................ > =20 > Best Regards, =20 > =20 > Kelly Troyer > "DYKE DELTA JD2" (Eventually) > "13B ROTARY"_ Engine > "RWS"_RD1C/EC2/EM2 > "MISTRAL"_Backplate/Oil Manifold >=20 > "TURBONETICS"_TO4E50 Turbo >=20 >=20 >=20 > From: Steve Thomas > To: Rotary motors in aircraft > Sent: Tue, April 19, 2011 6:24:20 PM > Subject: [FlyRotary] Burns Stainless Muffler Failure >=20 > I just did an inspection of my muffler and found that it was basically = coming apart inside. This is a Burns Stainless, 17" 2-Stage muffler = after 50 hours of flying behind a 2-rotor engine. Now, it could be that = 50 hours is a reasonable life for something like this, I don't know. = But, it certainly confirms the stories of muffler disintegration. I've = inspected this muffler several times over the last 50 hours, but this is = the first time that I've seen damage. But, when it comes apart, it = really comes apart. It is unfortunate, as the muffler was really = effective in reducing the noise and was light-weight. =20 >=20 >=20 > Best Regards, >=20 > Steve Thomas >=20 > _____________________ >=20 >=20 >=20 --Apple-Mail-63-735146566 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=iso-8859-1 Kelly, et. al.,

I now have over = 50 hours of flight on My Mistral engine.  There are problems that I = need to fix, but, the early results are good.  Here is a brief = summary:

1.  My oil temps are mostly under = control.  After many different fixes, including adding air exit = area, splitting the incoming air plenum to force more air through the = oil cooler, and increasing the size of my oil plumbing, my cruising = temps range from 195=BAF to 205=BAF.  On a hot day, the climb-out = temps are still too high and I will be working on that.  Mistral = uses the oil injection system, so, I burn about 1 qt. every 5 to 6 = hours.  I'm using Idemitsu 20W-50 right now.
2. =  Water temps are 183=BAF.  I cannot get it to go higher under = any circumstances.
3.  At 50% power, my fuel flow is 11 = GPH rich and 9GPH lean.  I cannot run much more power than that as = the EGTs are too high.  
4.  My EGTs are still too = high.  I've been discussing this with the chief engineer at = Mistral, and the prognosis is that I have a partially clogged injector. =  Since the fuel flows are calculated, they are probably off. =  I'm told that  I need a 10 micron filter.  I have a 40 = micron now, but I'm told that isn't enough.  
5.  I = believe that my air plenum scoop is too big.  I've added a ton of = exit area, but I'm still pressurizing my cowl.  Cooling should = improve if I cut down the scoop size.  I'll be working on that. =  
6.  The airplane is slow.  I'm hoping that I = can get better speeds once I cut down on the air plenum scoop. =  
7.  I'd also like to get my muffler in the cowl, = but with the technology currently available, I don't see how. =  Mufflers are just not there.  Mark Steitle is having good = results with his DNA, but they have been discontinued. I don't see = anything out there that will do the job.  The tangential style = mufflers are too power-robbing.  SpinTec mufflers have been = recommended in the past, but their shapes are not very aerodynamic. =  Anyone that might have a good suggestion, I'm listening. =   

Best Regards,

Steve = Thomas

______________________________________________________= _

On Apr 20, 2011, at 7:23 AM, Kelly Troyer wrote:

 
   Other than the muffler how is your ship = and its complete "Mistral" firewall forward installation
doing ?..................Are your cooling systems = doing the job and is the Mistral "FADEC" single
lever fuel and ignition ECU keeping the EGT under = control ?............I am sure the Rotary group
would be interested in hearing some of your numbers = such as fuel flow, EGT, oil and coolant
temps, = etc................
 
Best Regards,  
 
Kelly = Troyer
"DYKE DELTA JD2" (Eventually)

"13B ROTARY"_ = Engine
"RWS"_RD1C/EC2/EM2
"MISTRAL"_Backplate/Oil = Manifold

"TURBONETICS"_TO4E50 Turbo


From: Steve Thomas <glasair2@me.com>
To: Rotary motors in aircraft = <flyrotary@lancaironline.net>
Sent: Tue, April 19, 2011 6:24:20 = PM
Subject: [FlyRotary] Burns Stainless = Muffler Failure

I just did an inspection of my muffler and = found that it was basically coming apart inside.  This is a Burns = Stainless, 17" 2-Stage muffler after 50 hours of flying behind a 2-rotor = engine.  Now, it could be that 50 hours is a reasonable life for = something like this, I don't know.  But, it certainly confirms the = stories of muffler disintegration.  I've inspected this muffler = several times over the last 50 hours, but this is the first time that = I've seen damage.  But, when it comes apart, it really comes = apart.  It is unfortunate, as the muffler was really effective in = reducing the noise and was light-weight.  


Best = Regards,

Steve = Thomas

_____________________




= --Apple-Mail-63-735146566--