Return-Path: Received: from smtp812.mail.sc5.yahoo.com ([66.163.170.82] verified) by logan.com (CommuniGate Pro SMTP 4.1.8) with SMTP id 2955660 for flyrotary@lancaironline.net; Thu, 29 Jan 2004 13:17:48 -0500 Received: from unknown (HELO HomeComputer) (gregory?fuess@68.93.89.220 with login) by smtp812.mail.sc5.yahoo.com with SMTP; 29 Jan 2004 18:11:45 -0000 From: "Greg Fuess" To: "'Rotary motors in aircraft'" Subject: Renesis Engine For Aircraft Date: Thu, 29 Jan 2004 12:11:46 -0600 MIME-Version: 1.0 Content-Type: multipart/alternative; boundary="----=_NextPart_000_000F_01C3E661.10F231F0" X-Mailer: Microsoft Office Outlook, Build 11.0.5510 In-Reply-To: Thread-Index: AcPmfWlkUL4YeLarTSSk/Wucp+gDEgAFXc7Q X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 Message-ID: This is a multi-part message in MIME format. ------=_NextPart_000_000F_01C3E661.10F231F0 Content-Type: text/plain; charset="US-ASCII" Content-Transfer-Encoding: 7bit All, Some food for thought. Powersport has started replying to e-mail on another list, and was asked about the Renesis engine. This is what Tim had to say. I had thought that the Renesis would have been a great aircraft engine, but would have to lean towards more educated opinion. The questions to powersport and their replies are copied in full below. I would appreciate any feedback on what is said. Thanks, Greg Fuess Thanks for the info. Some questions for you: 1. What is the status of Powersport? Is it currently shipping FWF packages for RVs? Which model RVs? Currently we have completely developed FWF packages for RV 6-7-8-9 (9 at your own "not recommended by Vans" discretion.) 2. Is the Renesis engine interchangeable with the old 13B? Obviously different exhaust, but are the engine mounts, etc. the same? Simply put, the Renesis is not suited for installation in aircraft. There are many reasons for this. 3. Is the Renesis engine better than the old 13B for aviation use? I understand it has better economy and sealing due to the new port arrangement. Is there anything else we should consider? No, the Renesis is far worse for aviation use. It does not have better economy, especially at the RPM range used in an aircraft. It is lower HP! It still needs a suitable aircraft ECU added. It develops its HP at a higher RPM with will reduce its life cycle. The changes made were for emissions and low end torque, which are not important factors in aircraft. Mazda still uses P-Port system for their top racing application. 4. Is Powersport planning on switching to a Renesis-based FWF? No, see above. I am not saying the Renesis is not a good engine, it is a great engine... for a car. The HP ratings are way overstated. Those who have run them on dynos have reported outputs around 180HP. Thanks, Tim ------=_NextPart_000_000F_01C3E661.10F231F0 Content-Type: text/html; charset="US-ASCII" Content-Transfer-Encoding: quoted-printable

All, Some food for thought. Powersport has started = replying to e-mail on another list, and was asked about the Renesis engine. This is = what Tim had to say. I had thought that the Renesis would have been a great = aircraft engine, but would have to lean towards more educated opinion. The = questions to powersport and their replies are copied in full = below.

I would appreciate any feedback on what is = said.

Thanks, Greg Fuess

Thanks for the info. Some questions for = you:

1. What is the status of Powersport? Is it currently shipping = FWF
packages for RVs? Which model RVs?

Currently we have completely developed FWF packages for RV 6-7-8-9 (9 at your own =
"not recommended by Vans" discretion.)

2. Is the Renesis engine interchangeable with the old 13B? = Obviously
different exhaust, but are the engine mounts, etc. the = same?

Simply put, the Renesis is not suited for installation in aircraft. There are many =
reasons for this.

3. Is the Renesis engine better than the old 13B for aviation use? = I
understand it has better economy and sealing due to the new = port
arrangement. Is there anything else we should consider?

No, the Renesis is far worse for aviation use. It does not have better economy, =
especially at the RPM range used in an aircraft. It is lower HP! It still needs a = suitable
aircraft ECU added. It develops its HP at a higher RPM with will reduce its life = cycle.
The changes made were for emissions and low end torque, which are not important =
factors in aircraft. Mazda still uses P-Port system for their top racing = application.

4. Is Powersport planning on switching to a Renesis-based = FWF?

No, see above.

I am not saying the Renesis is not a good engine, it is a great engine... for a = car.
The HP ratings are way overstated. Those who have run them on dynos have = reported
outputs around 180HP.

Thanks,
Tim

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