X-Virus-Scanned: clean according to Sophos on Logan.com From: "Finn Lassen" Received: from omr-a018e.mx.aol.com ([204.29.186.64] verified) by logan.com (CommuniGate Pro SMTP 6.1.14) with ESMTPS id 9407751 for flyrotary@lancaironline.net; Fri, 27 Jan 2017 10:06:05 -0500 Received-SPF: pass receiver=logan.com; client-ip=204.29.186.64; envelope-from=finn.lassen@verizon.net Received: from mtaout-aao02.mx.aol.com (mtaout-aao02.mx.aol.com [172.27.21.14]) by omr-a018e.mx.aol.com (Outbound Mail Relay) with ESMTP id AC04038000A0 for ; Fri, 27 Jan 2017 10:05:46 -0500 (EST) Received: from [192.168.1.3] (0x5b3139322e3136382e312e335d [174.227.13.39]) by mtaout-aao02.mx.aol.com (MUA/Third Party Client Interface) with ESMTPA id D515B3800008F for ; Fri, 27 Jan 2017 10:05:45 -0500 (EST) Subject: Re: [FlyRotary] Finn's RV-3 Performance? To: Rotary motors in aircraft References: Message-ID: Date: Fri, 27 Jan 2017 10:05:44 -0500 User-Agent: Mozilla/5.0 (Windows NT 5.1; rv:45.0) Gecko/20100101 Thunderbird/45.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: multipart/alternative; boundary="------------258E9247065F1E72043A8BFF" x-aol-global-disposition: G x-aol-sid: 3039ac1b150e588b61c93554 X-AOL-IP: 174.227.13.39 This is a multi-part message in MIME format. --------------258E9247065F1E72043A8BFF Content-Type: text/plain; charset=utf-8; format=flowed Content-Transfer-Encoding: 8bit I usually cruise at 160 mph TAS burning 6 to 7 GPH depending on altitude. Maybe 6.5 at 8000'. I'd have to look closer next time I fly. I'll have to take it to top speed again, because I don't remember the numbers, but I don't think I've ever seen 200 mph except with heavy tail wind. Then again, the prop has been shortened after Richard did a wheel landing on a hard surface, so I doubt it's optimized for top speed. I regularly do see 2,500 fpm or more after take off, even though it's built too heavy (electric water pump, SS hoses, brackets, etc. that could be lighted). Still haven't gotten up the courage to do a loop because it's over gross aerobatic weight even with 5 gals of fuel. Finn On 1/26/2017 1:27 PM, Doug Lomheim wrote: > Finn: > > Can you post some performance numbers from your RV-3? > > I restored a “3A” w/O-290”G” (alternative engine :) ); and I flew it > for a year while putting 50 hrs. on it. I routinely would cruise it > at 2300-2350 rpm which equated to about 140-145 mph, and when leaned > out the fuel burn would avg. 4.9-5.1 GPH, and it topped out at about > 185 “mph" at 2,800 rpm. > > I’m curious how yours performs w/ the 13B; and I imagine it will be > much closer in performance to an O-320… > > Thanks for any info. > > Doug --------------258E9247065F1E72043A8BFF Content-Type: text/html; charset=utf-8 Content-Transfer-Encoding: 8bit

I usually cruise at 160 mph TAS burning 6 to 7 GPH depending on altitude. Maybe 6.5 at 8000'.
I'd have to look closer next time I fly.

I'll have to take it to top speed again, because I don't remember the numbers, but I don't think I've ever seen 200 mph except with heavy tail wind. Then again, the prop has been shortened after Richard did a wheel landing on a hard surface, so I doubt it's optimized for top speed.

I regularly do see 2,500 fpm or more after take off, even though it's built too heavy (electric water pump, SS hoses, brackets, etc. that could be lighted). Still haven't gotten up the courage to do a loop because it's over gross aerobatic weight even with 5 gals of fuel.

Finn

On 1/26/2017 1:27 PM, Doug Lomheim wrote:

Finn:

Can you post some performance numbers from your RV-3?

I restored a “3A” w/O-290”G” (alternative engine :) ); and I flew it for a year while putting 50 hrs. on it. I routinely would cruise it at 2300-2350 rpm which equated to about 140-145 mph, and when leaned out the fuel burn would avg. 4.9-5.1 GPH, and it topped out at about 185 “mph" at 2,800 rpm.

I’m curious how yours performs w/ the 13B; and I imagine it will be much closer in performance to an O-320…

Thanks for any info.

Doug

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