Return-Path: Received: from [24.25.9.102] (HELO ms-smtp-03-eri0.southeast.rr.com) by logan.com (CommuniGate Pro SMTP 4.2b6) with ESMTP id 245082 for flyrotary@lancaironline.net; Tue, 06 Jul 2004 16:19:30 -0400 Received: from EDWARD (clt25-78-058.carolina.rr.com [24.25.78.58]) by ms-smtp-03-eri0.southeast.rr.com (8.12.10/8.12.7) with SMTP id i66KITiB020601 for ; Tue, 6 Jul 2004 16:18:30 -0400 (EDT) Message-ID: <003601c46396$6c2ae050$2402a8c0@EDWARD> From: "Ed Anderson" To: "Rotary motors in aircraft" References: Subject: Re: [FlyRotary] Re: Second stock turbo bites the dust Date: Tue, 6 Jul 2004 16:18:37 -0400 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_0033_01C46374.E4D90300" X-Priority: 3 X-MSMail-Priority: Normal X-Mailer: Microsoft Outlook Express 6.00.2800.1409 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1409 X-Virus-Scanned: Symantec AntiVirus Scan Engine This is a multi-part message in MIME format. ------=_NextPart_000_0033_01C46374.E4D90300 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable MessageRusty, sounds like you are talking about the Areocharger. If so, = then you need to know that they were optimized for producing high boost = at low engine rpms and for use on smaller engines. I talked to them = about a two years ago, because I read about the areocharger in Corky = Bell's Maximum Boost book and when I realized it needed neither oil nor = coolant lines, it sounded idea for an aircraft installation. They did not even want to talk about one on a rotary engine (I never = mentioned aircraft of course). The told me they didn't think it would = survive the temperatures - but that might have been a factor of the type = metal they used in the turbine and of course things could have changed = since two years ago. Just wanted to mention it. It would sure be great = if it worked for aircraft use. Another thing that would concern me a bit is that it has a container of = turbine oil that lubricates the shaft via a "wick" (what ever that = really means), so there is a limited amount of turbine oil. I have no = idea how long it would last and what would happen if it got low (I think = I know {:>)). =20 But, if it is the areocharger, it has internal vanes in the turbine = housing that close down (focuses the exhaust gas on the blades) to give = tremendous boost at low rpms and then open up to reduce the effect of = the exhaust gas on the boost at higher rpms. The point is that it is = again a turbo designed to produce gobs of boost at lower rpms. That = would concern me at bit - even though the vanes would probably keep that = from being as bad as our stock turbo. So keep us informed if you got down that road. Ed RV-6A N494BW Rotary Powered Matthews, NC ----- Original Message -----=20 From: Russell Duffy=20 To: Rotary motors in aircraft=20 Sent: Tuesday, July 06, 2004 2:18 PM Subject: [FlyRotary] Re: Second stock turbo bites the dust This morning I managed to break Rusty's turbo. I had been cruising at = 11,000 ft with MAP 38, rpm 5100 and 175 kts TAS (about 155 IAS) for = almost 2 hours when rpm suddenly dropped to 2500. =20 Sorry to hear that John, though I'm obviously not surprised. I'm real = impressed with that slick bird though! Glad to hear you and the plane = made it back safely. Have you considered a supercharger? I wasn't going to say anything = about this unless I did it, but my rev-4 option (in the unlikely event = it's needed) is one of these: = http://www.procharger.com/superchargers.shtml Considering your current = situation, I figured I'd go ahead and throw this out for debate. =20 The current smallest unit is 7" diameter, 6" long, and about 15 lbs. = They also have a new unit coming out any day that's smaller, and still = capable of supporting 300+ HP. They're marketing it for Harley's. = These units are self contained, so there are no water or oil lines to = hook up. =20 There are some definite advantages, and disadvantages to consider, but = it's something else to think about. =20 Rusty (making all the power I need with RPM's I hope) =20 ------=_NextPart_000_0033_01C46374.E4D90300 Content-Type: text/html; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable Message
Rusty, sounds like you are talking = about the=20 Areocharger.  If so, then you need to know that they were optimized = for=20 producing high boost at  low engine rpms and for use on smaller=20 engines.  I talked to them about a two years ago, because I read = about the=20 areocharger in Corky Bell's Maximum Boost book  and when = I=20 realized it needed neither oil nor coolant lines, it sounded idea for an = aircraft installation.
 
They did not even want to talk about = one on a=20 rotary engine (I never mentioned aircraft of course).  The told me = they=20 didn't think it would survive the temperatures - but that might have = been a=20 factor of the type metal they used in the turbine and of course things = could=20 have changed since two years ago.  Just wanted to mention it.  = It=20 would sure be great if it worked for aircraft use.
 
Another thing that would concern me a = bit is that=20 it has a container of turbine oil that lubricates the shaft via a "wick" = (what=20 ever that really means), so there is a limited amount of turbine = oil.  I=20 have no idea how long it would last and what would happen if it got low = (I think=20 I know {:>)). 
 
But, if  it is the areocharger, it = has=20 internal vanes in the turbine housing that close down (focuses the = exhaust gas=20 on the blades) to give tremendous boost at low rpms and then open up to = reduce=20 the effect of the exhaust gas on the boost at higher rpms.  The = point is=20 that it is again a turbo designed to produce gobs of boost at lower = rpms. =20 That would concern me at bit - even though the vanes would probably keep = that=20 from being as bad as our stock turbo.
 
So keep us informed if you got down = that=20 road.
 
Ed
 
RV-6A N494BW Rotary Powered
Matthews, NC
----- Original Message -----
From:=20 Russell=20 Duffy
Sent: Tuesday, July 06, 2004 = 2:18=20 PM
Subject: [FlyRotary] Re: Second = stock=20 turbo bites the dust

This morning I managed to break Rusty's turbo.  I had been cruising at 11,000 = ft with=20 MAP 38, rpm 5100 and 175 kts TAS (about 155 IAS) for almost 2 hours = when rpm=20 suddenly dropped to 2500.  
 
Sorry to=20 hear that John, though I'm obviously not surprised.  I'm real = impressed=20 with that slick bird though!  Glad to hear you and the plane made = it back=20 safely.
 
Have you=20 considered a supercharger?  I wasn't going to say anything about = this=20 unless I did it, but my rev-4 option (in the unlikely event it's = needed)=20 is one of these:  http://www.prochar= ger.com/superchargers.shtml =20 Considering your current situation, I figured I'd go ahead and throw = this out=20 for debate. 
 
The current=20 smallest unit is 7" diameter, 6" long, and about 15 lbs.  They = also have=20 a new unit coming out any day that's smaller, and still capable=20 of supporting 300+ HP.  They're marketing it for=20 Harley's.   These units are self contained, so there = are no=20 water or oil lines to hook = up.  
 
There are some=20 definite advantages, and disadvantages to consider, but it's = something=20 else to think about.   
 
Rusty (making all the power I need with RPM's I=20 hope)    
 
 
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