X-Virus-Scanned: clean according to Sophos on Logan.com Return-Path: Received: from elasmtp-masked.atl.sa.earthlink.net ([209.86.89.68] verified) by logan.com (CommuniGate Pro SMTP 5.1.10) with ESMTP id 2191835 for flyrotary@lancaironline.net; Sat, 21 Jul 2007 19:18:31 -0400 Received-SPF: none receiver=logan.com; client-ip=209.86.89.68; envelope-from=jerryhey@earthlink.net DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=dk20050327; d=earthlink.net; b=dEI+xS1sLDWqt9uR93PFT1qG20O9b9OBhZfPnKOJU1PHyJz5EgYYhebc51yqgWZf; h=Received:Mime-Version:In-Reply-To:References:Content-Type:Message-Id:From:Subject:Date:To:X-Mailer:X-ELNK-Trace:X-Originating-IP; Received: from [71.49.145.6] (helo=[192.168.0.101]) by elasmtp-masked.atl.sa.earthlink.net with asmtp (Exim 4.34) id 1ICOCw-0005zP-GT for flyrotary@lancaironline.net; Sat, 21 Jul 2007 19:17:54 -0400 Mime-Version: 1.0 (Apple Message framework v752.3) In-Reply-To: References: Content-Type: multipart/alternative; boundary=Apple-Mail-1-594243014 Message-Id: From: Jerry Hey Subject: Re: [FlyRotary] Re: carbs vs efi Date: Sat, 21 Jul 2007 19:17:53 -0400 To: "Rotary motors in aircraft" X-Mailer: Apple Mail (2.752.3) X-ELNK-Trace: 8104856d7830ec6b1aa676d7e74259b7b3291a7d08dfec7901126a262437306842291a1ab33bf7e6350badd9bab72f9c350badd9bab72f9c350badd9bab72f9c X-Originating-IP: 71.49.145.6 --Apple-Mail-1-594243014 Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=US-ASCII; delsp=yes; format=flowed George, maybe I have the wrong idea, but I don't understand why you need such a large bore carb for the single rotor. No way you are going to produce more than 150 hp. I think 38mm would be enough. This is what Aero Carb recommends for the 0-320. Jerry On Jul 21, 2007, at 5:56 PM, George Lendich wrote: > Jerry, > Looks like Pat was wrong about Revmaster having a 44mm, the biggest > they go to is 42mm ( at the present time) and that costs $380. If I > remember the 32mm costs $320. > Jerry I would be interested in feed back on what you thought about > the Aero Carb, especially how it's constructed - their all a little > different. > I do like the Ellison but it's too bloody expensive. > George ( down under) > George, the web site says $326.00. You might want to compare the > aero carb which is similar. http://www.aeroconversions.com > I will be looking at both at Oshkosh on Tuesday and Wednesday next > week. Jerry > > > Jerry > > > > > > > On Jul 20, 2007, at 10:06 PM, George Lendich wrote: > >> >> I have been surprised at the recent flurry of carb postings. I >> assumed that everyone was doing EFI. having experienced total >> electrical failure in march on a trip to the Bahamas I was >> thinking a lot about that Neanderthal carb bolted under my O320 >> and the magnetos, all unaware of what was going on in the radio, >> GPS, and nav lights departments. the reality is that you don't >> want a reserve battery to get you to the ground safely, you want >> to get to the Bahamas and back and THEN look into what's wrong. >> my questions are "how much power/performance is lost with a carb, >> and which carbs can do manual mixture?". is it stupid to ask if >> the Lycoming carb could run a 13B? someone mentioned Harley carbs >> having a good history of rough service. what about marvel/ >> schebler? is this question heresy? :-) isn't efi a bit of >> overkill for an engine that basically runs at 100% power, 75% >> power and idle? scanning thru the archives I see a lot of >> postings regarding mixture, mapping, abrupt failures and such. >> does this complexity buy us 5%, 20%? the question of turbo- >> charging seems to beg similar line of questioning. kevin >> >> Kevin, >> It's probably my fault, with a number of chaps helping me out with >> information. >> My Buddy Bill Jepson will tell you nothing beats EFI and when it's >> running well, he's absolutely right! >> Not only that it is the best for fuel efficiency, leaning reading >> fuel flow etc. etc. >> However I'm developing a single rotor and looking at all sorts of >> issues including cost effectiveness of less elaborate >> installations. I'm also not keen on high pressure >> fuel under the cowl. >> Most importantly I'm not an electronics person and seeing the >> problems experienced by others has me more than a little nervous, >> in regard to EFI. >> Of course I know very little about carbies, so their helping me >> with this as well. >> The Revmaster might be the choice for me, but I'm awaiting the >> sticker shock! >> George ( down under) >> > > --Apple-Mail-1-594243014 Content-Transfer-Encoding: quoted-printable Content-Type: text/html; charset=ISO-8859-1 George,=A0 maybe I have the = wrong idea, but I don't understand why you need such a large bore carb = for the single rotor.=A0 No way you are going to produce more than 150 = hp.=A0 I think 38mm would be enough.=A0 This is what Aero Carb = recommends for the 0-320.=A0 Jerry

=A0
On Jul 21, = 2007, at 5:56 PM, George Lendich wrote:

Jerry I would be interested in feed back on = what you thought about the Aero Carb, especially how it's constructed - = their all a little different.
I do like the Ellison but it's too bloody = expensive.
George,=A0 the web = site says $326.00.=A0 You might want to compare the aero carb which is = similar.=A0=A0






On Jul 20, = 2007, at 10:06 PM, George Lendich wrote:

=A0
I have been surprised at the = recent flurry of carb postings.=A0 I assumed that everyone was doing = EFI.=A0 having experienced total electrical failure in march on a trip = to the Bahamas I was thinking a lot about that Neanderthal carb bolted = under my O320 and the magnetos, all unaware of what was going on in the = radio, GPS,=A0and nav lights departments.=A0=A0=A0 the reality is that = you don't want a reserve battery to get you to the ground safely, you = want to get to the Bahamas and back and THEN look into what's = wrong.
my = questions are "how much power/performance is lost with a carb, and which = carbs can do manual mixture?".=A0 is it stupid to ask if the Lycoming = carb could run a 13B?=A0 someone mentioned Harley carbs=A0having a=A0good = history of rough service.=A0 what about marvel/schebler?=A0 is this = question heresy? :-)=A0 isn't efi a bit of overkill for an engine that = basically runs at 100% power, 75% power and idle?=A0 scanning thru the = archives I see a lot of postings regarding mixture, mapping, abrupt = failures and such.=A0 does this complexity buy us 5%, 20%?=A0 the = question of turbo-charging seems to=A0beg similar line of = questioning.=A0=A0=A0 kevin
=A0
Kevin,
It's probably my fault, with a number of chaps helping me out with = information.
My Buddy Bill Jepson will tell you nothing beats EFI and when it's = running well, he's absolutely = right!
Not = only that it is the best for=A0 fuel efficiency, leaning reading fuel = flow etc. etc.
However I'm developing a single rotor and looking at all sorts of = issues including cost effectiveness of less elaborate installations. I'm = also not keen on high pressure
fuel under the = cowl.
Most = importantly I'm not=A0an electronics person and seeing the problems = experienced by others has me more than a little nervous, in regard to = EFI.
Of = course I know very little about carbies, so their helping me with this = as well.
The Revmaster might be the choice for me, but I'm awaiting the = sticker shock!
George ( down under)




= --Apple-Mail-1-594243014--