Return-Path: Sender: (Marvin Kaye) To: flyrotary Date: Tue, 05 Nov 2002 07:55:29 -0500 Message-ID: X-Original-Return-Path: Received: from out010.verizon.net ([206.46.170.133] verified) by logan.com (CommuniGate Pro SMTP 4.0) with ESMTP id 1853091 for flyrotary@lancaironline.net; Tue, 05 Nov 2002 04:54:55 -0500 Received: from [65.239.43.223] ([65.239.57.113]) by out010.verizon.net (InterMail vM.5.01.05.09 201-253-122-126-109-20020611) with ESMTP id <20021105095450.NMGA1469.out010.verizon.net@[65.239.43.223]> for ; Tue, 5 Nov 2002 03:54:50 -0600 Mime-Version: 1.0 X-Sender: res0c5l1@mail.verizon.net X-Original-Message-Id: In-Reply-To: References: X-Original-Date: Tue, 5 Nov 2002 01:53:57 -0800 X-Original-To: (Rotary motors in aircraft) From: Ken Welter Subject: Re: [FlyRotary] 12A vs. 13B Content-Type: multipart/alternative; boundary="============_-1175632448==_ma============" --============_-1175632448==_ma============ Content-Type: text/plain; charset="us-ascii" ; format="flowed" >I have this opportunity to obtain an RX-7 with a 12A aboard. >All the talk, research, and apparently flying aircraft seem to be centered >around the 13B and 20B. > >What difference is there in the 12A and is it suitable for aircraft use? >Too heavy? Too wimpy? Can I turbocharge it? Or should I just junque it? > >Larry I put about 150 hrs on my coot with a 12a in it and was quite impressed with it, I had to turn it about 500 rpm higher than the 13b to put out about the same power but it worked good. I turned about 7000 rpm on takeoff and 6500 for cruise which may seem high but I fly at 3000 lb gross weight with this big bird. Also the short 3 mm apex seals are very durable and will take a lot of punishment. Ken Welter http://homepage.mac.com/rotarycoot/ > >> Homepage: http://www.flyrotary.com/ --============_-1175632448==_ma============ Content-Type: text/html; charset="us-ascii" Re: [FlyRotary] 12A vs. 13B
I have this opportunity to obtain an RX-7 with a 12A aboard.
All the talk, research, and apparently flying aircraft seem to be centered
around the 13B and 20B.

What difference is there in the 12A and is it suitable for aircraft use?
Too heavy?  Too wimpy?  Can I turbocharge it?  Or should I just junque it?

Larry

  I put about 150 hrs on my coot with a 12a in it and was quite impressed with it, I had to turn it about 500 rpm higher than the 13b to put out about the same power but it worked good.
 I turned about 7000 rpm on takeoff and 6500 for cruise which may seem high but I fly at 3000 lb gross weight with this big bird.
 Also the short 3 mm apex seals are very durable and will take a lot of punishment.
  Ken Welter
  http://homepage.mac.com/rotarycoot/





>>  Homepage:  http://www.flyrotary.com/

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