Return-Path: Received: from [12.10.147.52] (HELO utmcmail.utmc.com) by logan.com (CommuniGate Pro SMTP 4.2) with ESMTP id 359942 for flyrotary@lancaironline.net; Tue, 10 Aug 2004 14:20:43 -0400 Received-SPF: none receiver=logan.com; client-ip=12.10.147.52; envelope-from=Grant.Schemmel@Aeroflex.com Received: from mcwolf.utmc.utc.com ([10.1.1.1]) by utmcmail.utmc.com with Microsoft SMTPSVC(5.0.2195.6713); Tue, 10 Aug 2004 12:12:28 -0600 Received: from pony.utmc.utc.com(172.24.100.19) by mcwolf.utmc.utc.com via csmap id f4c2066a_eaf9_11d8_9dd9_003048116499_5722; Tue, 10 Aug 2004 12:20:28 -0600 (MDT) Received: by pony.utmc.utc.com with Internet Mail Service (5.5.2655.55) id ; Tue, 10 Aug 2004 12:20:09 -0600 Message-ID: From: "Schemmel, Grant" To: 'Rotary motors in aircraft' Subject: RE: [FlyRotary] Re: Warp was Re: Turbos from the land of Oz Date: Tue, 10 Aug 2004 12:20:09 -0600 MIME-Version: 1.0 X-Mailer: Internet Mail Service (5.5.2655.55) Content-Type: multipart/alternative; boundary="----_=_NextPart_001_01C47F06.AB3D0210" Return-Path: Grant.Schemmel@Aeroflex.com X-OriginalArrivalTime: 10 Aug 2004 18:12:28.0065 (UTC) FILETIME=[98577910:01C47F05] This message is in MIME format. Since your mail reader does not understand this format, some or all of this message may not be legible. ------_=_NextPart_001_01C47F06.AB3D0210 Content-Type: text/plain; charset="ISO-8859-1" Hi Dave, Regarding Warp Drive props, I've had one on my Zodiac 601 for about 2 years now. The prop is a 68" 3-blade with the "constant speed" planform attached to a Continental O-200. So far, I can't say that I'm terribly impressed. Pros: The ground adjust capability and method are good. It's nice to be able to dial in how much prop you want. Nicks and dings in the prop are easily fixed with a glob of epoxy and some sandpaper. The prop construction and retention in the HP hub seem pretty positive. Cons: Doesn't give the performance I was expecting. After reading Mr. Lipps' article in the last Contact issue, I suspect the airfoil isn't very efficient, as he pointed out in the article that any prop with a flat bottom and a sharp leading edge has poor efficiency, and the Warp Drive has both. 'Course, I do have to add the caveat that I fly out of an airport at 5440' elevation. The one time I tried it at a 1000' elevation, it was like a completely different airplane. The composite construction is very sensitive to nicks. If you go the Warp Drive route, make sure you get the nickel leading edge protection. Can't say much about the taper on the blades - my cruise speed seems less than other Zodie drivers, but that may be due to a general need for aerodynamic cleanup and the extra weight of the Continental. Grant Schemmel -----Original Message----- From: DaveLeonard [mailto:daveleonard@cox.net] Sent: Tuesday, August 10, 2004 11:20 AM To: Rotary motors in aircraft Subject: [FlyRotary] Re: Turbos from the land of Oz John, I'm very interested to hear how long this one lasts :-). Did you plug that big old hole in your intercooler yet? BTW I forgot to ask and I assume the awns is yes, but are you running water to the turbo? I'm also shopping for a new prop. Thinking about a warp drive ground adjustable. Anyone have any experience (I already read what I could find on the RV list) Dave Leonard ------_=_NextPart_001_01C47F06.AB3D0210 Content-Type: text/html; charset="ISO-8859-1"

Hi Dave,

Regarding Warp Drive props, I've had one on my Zodiac 601 for about 2 years now. The prop is a 68" 3-blade with the "constant speed" planform attached to a Continental O-200. So far, I can't say that I'm terribly impressed.

Pros: The ground adjust capability and method are good. It's nice to be able to dial in how much prop you want.

Nicks and dings in the prop are easily fixed with a glob of epoxy and some sandpaper.

The prop construction and retention in the HP hub seem pretty positive.

Cons: Doesn't give the performance I was expecting. After reading Mr. Lipps' article in the last Contact issue, I suspect the airfoil isn't very efficient, as he pointed out in the article that any prop with a flat bottom and a sharp leading edge has poor efficiency, and the Warp Drive has both. 'Course, I do have to add the caveat that I fly out of an airport at 5440' elevation. The one time I tried it at a 1000' elevation, it was like a completely different airplane.

The composite construction is very sensitive to nicks. If you go the Warp Drive route, make sure you get the nickel leading edge protection.

Can't say much about the taper on the blades - my cruise speed seems less than other Zodie drivers, but that may be due to a general need for aerodynamic cleanup and the extra weight of the Continental.

Grant Schemmel

-----Original Message-----
From: DaveLeonard [mailto:daveleonard@cox.net]
Sent: Tuesday, August 10, 2004 11:20 AM
To: Rotary motors in aircraft
Subject: [FlyRotary] Re: Turbos from the land of Oz

John, I'm very interested to hear how long this one lasts :-). Did you plug that big old hole in your intercooler yet? BTW I forgot to ask and I assume the awns is yes, but are you running water to the turbo?

I'm also shopping for a new prop. Thinking about a warp drive ground adjustable. Anyone have any experience (I already read what I could find on the RV list)

Dave Leonard

------_=_NextPart_001_01C47F06.AB3D0210--