X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from cdptpa-omtalb.mail.rr.com ([75.180.132.120] verified) by logan.com (CommuniGate Pro SMTP 5.2c4) with ESMTP id 2644916 for flyrotary@lancaironline.net; Mon, 14 Jan 2008 15:07:54 -0500 Received-SPF: pass receiver=logan.com; client-ip=75.180.132.120; envelope-from=eanderson@carolina.rr.com Received: from edward2 ([24.74.103.61]) by cdptpa-omta04.mail.rr.com with SMTP id <20080114200712.IRVQ29372.cdptpa-omta04.mail.rr.com@edward2> for ; Mon, 14 Jan 2008 20:07:12 +0000 Message-ID: <003101c856e8$cec864a0$2402a8c0@edward2> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Drips? was [FlyRotary] Re: URL for HushPower Date: Mon, 14 Jan 2008 15:05:27 -0500 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_002E_01C856BE.E5C29A10" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2900.3138 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2900.3138 This is a multi-part message in MIME format. ------=_NextPart_000_002E_01C856BE.E5C29A10 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Well, Mark, I tried that. Actually I tried both SS pot scrubbers as = well as SS machining shavings. They withstand the heat with no problem, = but the shock of the exhaust soon pound them into small pieces that get = blown out of the muffler. However, I did not tried stuffing a HushPower = II. Ed ----- Original Message -----=20 From: Mark Steitle=20 To: Rotary motors in aircraft=20 Sent: Monday, January 14, 2008 10:54 AM Subject: [FlyRotary] Re: Drips? was [FlyRotary] Re: URL for HushPower Sorry to say, but I agree. I'm thinking of stuffing my HP-2 with SS = shavings. =20 Mark =20 On 1/14/08, bmears9413@aol.com wrote:=20 Im real worried about my noise factor. twelve pipes right in front = of me. no muffler. each 1 1/2" exhaust pipe actually has a 3/4 hole to = exhaust out of. im hoping that will quiet it a bit....but im pretty sure = im full of crap....its gonna be toooooo loud.=20 Bob Mears -----Original Message----- From: Mark Steitle To: Rotary motors in aircraft < flyrotary@lancaironline.net> Sent: Mon, 14 Jan 2008 9:39 am Subject: [FlyRotary] Re: Drips? was [FlyRotary] Re: URL for = HushPower=20 The problem with the auger muffler is that everyone said it sounded = like a flying weed-eater. It was sometimes described as a flying = chainsaw. Not the most flattering description. It wasn't "that" loud, = but you could definitely hear me coming from miles out. Maybe that's a = good thing? =20 I guess we'll soon find out what the HP-2 sounds like with no = packing. =20 Mark =20 On 1/14/08, bmears9413@aol.com < bmears9413@aol.com> wrote:=20 Mark, I thought your spiral muffler you built was quiet. Did it turn out = to be too loud after you got in the air? Or too much back pressure?=20 Bob Mears -----Original Message----- From: Mark Steitle To: Rotary motors in aircraft < flyrotary@lancaironline.net> Sent: Mon, 14 Jan 2008 9:12 am Subject: [FlyRotary] Re: Drips? was [FlyRotary] Re: URL for = HushPower=20 Ed,=20 I don't think it was doing this until after shutdown. That makes = sense as all the heat builds with no airflow over the muffler. It would = probably be wise to put a SS heat shield between the muffler and the = fuselage floor. (I had a piece of Zetex installed, but hadn't waited = long enough for the RTV to cure and it started coming off during flight. = I will try a fresh piece, and wait a little longer this time. =20 You're probably right on 1 though 4. I suspect the packing = material to be fiberglass. I doubt that ceramic would melt that easily. = =20 Mark Packing, I don't need no stink'in packing! =20 On 1/14/08, Ed Anderson wrote:=20 Hi Mark, interesting development. I suspect several reasons you = may be the only one to notice. 1. It might be that the 3 rotor keeps the average muffler heat = level higher as you have (approx 1/3 more heat energy with the third = pulse during the same time interval). 2. Your muffler is pretty close to the exhaust port - less = chance to lose heat before the muffler 3. Your muffler is pointed down (mine and I suspect most are = more/less horizontal) and therefore provided an easy path for the melted = packing to drip down. 4. What does the packing seem like? I would have expected = glass or ceramic packing - but, a glass packing would be the more likely = of the two to melt. If this is the insulation packing and it goes, then the shell = might get a bit hotter. ----- Original Message -----=20 From: Mark Steitle=20 To: Rotary motors in aircraft=20 Sent: Saturday, January 12, 2008 5:58 PM Subject: [FlyRotary] Re: URL for HushPower =20 For rotorheads that are contemplating using (also the mildly = curious) the Flowmaster HP-2 "resonator" muffler, I installed the HP-2 today on my 20B and was able to do a = run-up. Bobby Hughes and I both agree that the exhaust tone is much, = much mellower with a deeper tone. My Lighspeed ANR headset had no = problem cancelling out this low-frequency exhaust tone. While the = overall sound level was still pretty significant, the exhaust tone was = much more pleasant to the ears. The ear-piercing, glass shattering, = nails-on-the-chalkboard, make-you-bleed-from-the-ears, exhaust tone is = totally tamed. The 3-blade M/T prop is the primary noisemaker now. The = test took place between two rows of hangars, so I feel that DB readings = are not very realistic. I'll take those again out on the ramp and post = the numbers. If the HP-2 holds up to the pounding of the rotary's = exhaust, I'll be a very happy camper.=20 Mark S. On Jan 12, 2008 3:22 PM, Ed Anderson = wrote:=20 They are both used stock Rx-7 turbos. one is the older = model pre 89 and the second is a later model 91 year. They both appear = to be in working condition in no nicks on the blades and they spin. I = used compressed air to spin the compressor wheels to they were really = whizzing along.=20 One came with my 91 turbo block and the other was given to = me.=20 Ed ----- Original Message -----=20 From: Thomas Jakits=20 To: Rotary motors in aircraft=20 Sent: Saturday, January 12, 2008 3:46 PM Subject: [FlyRotary] Re: URL for HushPower =20 Well, then we just have to keep on looking for a "justification" = for you/your area/etc. :) Just wait, I'll find something! :) Thomas How about: "..... I have two turbo sitting in my = shop......." =20 ...are they new/used? What's the scoop on them? ---------------------------------------------------------------------- -- Homepage: http://www.flyrotary.com/ Archive and UnSub: = http://mail.lancaironline.net:81/lists/flyrotary/List.html =20 -------------------------------------------------------------------------= - More new features than ever. Check out the new AOL Mail! =20 =20 -------------------------------------------------------------------------= --- More new features than ever. Check out the new AOL Mail! =20 ------=_NextPart_000_002E_01C856BE.E5C29A10 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable
Well, Mark, I tried that.  Actually I tried = both SS=20 pot scrubbers as well as SS machining shavings.  They withstand the = heat=20 with no problem, but the shock of the exhaust soon pound them into small = pieces=20 that get blown out of the muffler.  However, I did not tried = stuffing a=20 HushPower II.
 
Ed
----- Original Message -----
From:=20 Mark = Steitle=20
Sent: Monday, January 14, 2008 = 10:54=20 AM
Subject: [FlyRotary] Re: Drips? = was=20 [FlyRotary] Re: URL for HushPower

Sorry to say, but I agree.  I'm thinking of stuffing my HP-2 = with SS=20 shavings. 
 
Mark

 
On 1/14/08, bmears9413@aol.com <bmears9413@aol.com> = wrote:=20
Im=20 real worried about my noise factor. twelve pipes right in front of = me. no=20 muffler. each 1 1/2" exhaust pipe actually has a 3/4 hole to exhaust = out of.=20 im hoping that will quiet it a bit....but im pretty sure im full of=20 crap....its gonna be toooooo loud.

Bob=20 Mears


-----Original Message-----
From: Mark Steitle = <msteitle@gmail.com>
To: Rotary motors in = aircraft=20 < flyrotary@lancaironline.net>
Sent: Mon, 14 = Jan 2008=20 9:39 am
Subject: [FlyRotary] Re: Drips? was [FlyRotary] Re: URL = for=20 HushPower

The problem with the auger muffler is that everyone said it = sounded=20 like a flying weed-eater.  It was sometimes described as a = flying=20 chainsaw.  Not the most flattering description.  It wasn't = "that"=20 loud, but you could definitely hear me coming from miles out.  = Maybe=20 that's a good thing? 
 
I guess we'll soon find out what the HP-2 sounds like = with no=20 packing. 
 
Mark

 
On 1/14/08, bmears9413@aol.com=20 < = bmears9413@aol.com>=20 wrote:=20
Mark,
I=20 thought your spiral muffler you built was quiet. Did it turn out = to be too=20 loud after you got in the air? Or too much back pressure? =

Bob=20 Mears


-----Original Message-----
From: Mark Steitle = <msteitle@gmail.com>
To: Rotary motors in = aircraft=20 < flyrotary@lancaironline.net>
Sent: Mon, = 14 Jan=20 2008 9:12 am
Subject: [FlyRotary] Re: Drips? was [FlyRotary] = Re: URL=20 for HushPower

Ed,
I don't think it was doing this until after shutdown.  = That=20 makes sense as all the heat builds with no airflow over the = muffler. =20 It would probably be wise to put a SS heat shield between the = muffler and=20 the fuselage floor.  (I had a piece of Zetex installed, but = hadn't=20 waited long enough for the RTV to cure and it started coming off = during=20 flight.  I will try a fresh piece, and wait a little longer = this=20 time. 
 
You're probably right on 1 though 4.  I suspect the = packing=20 material to be fiberglass.  I doubt that ceramic would melt = that=20 easily. 
 
Mark
Packing, I don't need no stink'in = packing!

 
On 1/14/08, Ed=20 Anderson <eanderson@carolina.rr.com > wrote:=20
Hi Mark, interesting development.  = I=20 suspect several reasons you may be the only one to=20 notice.
 
1.  It might be that the 3 rotor = keeps the=20 average muffler heat level higher as you have (approx 1/3 more = heat=20 energy with the third pulse during the same time = interval).
2.  Your muffler is pretty close to = the=20 exhaust port - less chance to lose heat before the = muffler
3.  Your muffler is pointed down = (mine and I=20 suspect most are more/less horizontal) and therefore provided an = easy=20 path for the melted packing to drip down.
4.  What does the packing seem = like?  I=20 would have expected glass or ceramic packing - but, a glass = packing=20 would be the more likely of the two to melt.
 
 
  If this is the insulation = packing and=20 it goes, then the shell might get a bit hotter.
 
 
----- Original Message ----- =
From: Mark = Steitle
To: Rotary motors=20 in aircraft
Sent: Saturday, January = 12, 2008=20 5:58 PM
Subject: [FlyRotary] = Re: URL for=20 HushPower

 
For rotorheads that are contemplating = using (also=20 the mildly curious) the Flowmaster HP-2 "resonator" = muffler,

I=20 installed the HP-2 today on my 20B and was able to do a = run-up. =20 Bobby Hughes and I both agree that the exhaust tone is much, = much=20 mellower with a deeper tone.  My Lighspeed ANR headset = had no=20 problem cancelling out this low-frequency exhaust tone.  = While=20 the overall sound level was still pretty significant, the = exhaust tone=20 was much more pleasant to the ears.  The ear-piercing, = glass=20 shattering, nails-on-the-chalkboard, = make-you-bleed-from-the-ears,=20 exhaust tone is totally tamed.  The 3-blade M/T prop is = the=20 primary noisemaker now.  The test took place between two = rows of=20 hangars, so I feel that DB readings are not very = realistic.  I'll=20 take those again out on the ramp and post the numbers.  = If the=20 HP-2 holds up to the pounding of the rotary's exhaust, I'll be = a very=20 happy camper.

Mark S.



On Jan 12, 2008 3:22 PM, Ed Anderson = <eanderson@carolina.rr.com> wrote:
They are both used stock Rx-7 = turbos. =20 one is the older model pre 89  and the second is a = later model=20 91 year.  They both appear to be in working condition = in no=20 nicks on the blades and they spin.  I used compressed = air to=20 spin the compressor wheels to they were really whizzing = along.=20
 
One came with my 91 turbo block and = the other=20 was given to me.
 
Ed
 
 
-----=20 Original Message -----
From:=20 Thomas=20 Jakits
To:=20 Rotary=20 motors in aircraft
Sent:=20 Saturday, January 12, 2008 3:46 PM
Subject:=20 [FlyRotary] Re: URL for HushPower

 
Well,

then we just have to = keep on=20 looking for a "justification" for you/your area/etc.=20 :)

Just wait, I'll find something!=20 :)

Thomas

How about: "..... I have=20 two turbo sitting in my shop......." 

...are = they=20 new/used? What's the scoop on=20 = them?

--
Homepage:  http://www.flyrotary.com/
Archive and=20 UnSub:   http://mail.lancaironline.net:81/lists/flyrotary/List.htm= l
=

 
More new features than ever. Check out the new AOL=20 Mail!
 

 
More new features than ever. Check out the new AOL=20 Mail!
 

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