Return-Path: Received: from mail.viclink.com ([66.129.220.6] verified) by logan.com (CommuniGate Pro SMTP 4.1.4) with ESMTP id 2601046 for flyrotary@lancaironline.net; Tue, 23 Sep 2003 23:11:16 -0400 Received: from viclink.com (p054.AS1.viclink.com [66.129.192.54]) by mail.viclink.com (8.11.7/8.11.7) with ESMTP id h8O3BAY04082 for ; Tue, 23 Sep 2003 20:11:10 -0700 (PDT) Message-ID: <3F710AFC.806@viclink.com> Date: Tue, 23 Sep 2003 20:09:48 -0700 From: Perry Mick User-Agent: Mozilla/5.0 (Windows; U; Win95; en-US; rv:1.0.1) Gecko/20020823 Netscape/7.0 X-Accept-Language: en-us, en MIME-Version: 1.0 To: Rotary motors in aircraft Subject: Re: [FlyRotary] Jet Hawk References: Content-Type: multipart/alternative; boundary="------------000809000906020409070201" X-RAVMilter-Version: 8.4.3(snapshot 20030217) (mail.viclink.com) --------------000809000906020409070201 Content-Type: text/plain; charset=us-ascii; format=flowed Content-Transfer-Encoding: 7bit Russell Duffy wrote: > Hang in there Rusty. I got some of the same in the early days, having > a ducted fan and a rotary engine. I may eventually go PSRU but I will > never go Lycoming! Love that rotary. I think I'm accumulating more > hours than the trainers on the field. > > Perry > > Thanks Perry. Say, I've been meaning to ask if you've ever looked > into the Jet Hawk. As I'm guessing you know, it was a jet looking > ducted fan design that used a rotary engine. These were advertised > quite a bit years ago, plans were sold, and a few were completed, but > it's my understanding that it didn't perform that well. I guess it > used a simple homemade fan, that didn't work very well. I tried at > one time to buy plans, but never found anyone to sell me any. I'd > probably still buy a set if anyone has any. I understand that there > are some fan units that would make the plane work, but the fans are > about $10k. > > Cheers, > Rusty > In 94 I got the idea of using a rotary to drive a ducted fan. Information was scarce. It wasn't until 97 that I found a book for sale on the internet, "Ducted Fan Design" by Marc de Piolenc. It is the equations in that book my ductfan was designed to. There is an example in the book, where Marc designs a ducted fan to improve the performance of the Jet Hawk. That was the first I had heard of the Jet Hawk. So my knowledge of it is limited to what I've read in that book. I could build a fan for much less than $10k! According to Marc's definition, my ducted fan isn't really a ducted fan. It is a shrouded propeller. The equations were developed assuming long ducts, it makes the math easier. But I used them anyway. -- Perry Mick Custom Composite Props mick@bridgingworlds.com http://www.ductedfan.com --------------000809000906020409070201 Content-Type: text/html; charset=us-ascii Content-Transfer-Encoding: 7bit Russell Duffy wrote:

Message
Hang in there Rusty. I got some of the same in the early days, having a ducted fan and a rotary engine. I may eventually go PSRU but I will never go Lycoming! Love that rotary. I think I'm accumulating more hours than the trainers on the field.

Perry

Thanks Perry. Say, I've been meaning to ask if you've ever looked into the Jet Hawk. As I'm guessing you know, it was a jet looking ducted fan design that used a rotary engine. These were advertised quite a bit years ago, plans were sold, and a few were completed, but it's my understanding that it didn't perform that well. I guess it used a simple homemade fan, that didn't work very well. I tried at one time to buy plans, but never found anyone to sell me any. I'd probably still buy a set if anyone has any. I understand that there are some fan units that would make the plane work, but the fans are about $10k.

Cheers,

Rusty

In 94 I got the idea of using a rotary to drive a ducted fan. Information was scarce. It wasn't until 97 that I found a book for sale on the internet, "Ducted Fan Design" by Marc de Piolenc. It is the equations in that book my ductfan was designed to. There is an example in the book, where Marc designs a ducted fan to improve the performance of the Jet Hawk. That was the first I had heard of the Jet Hawk. So my knowledge of it is limited to what I've read in that book.

I could build a fan for much less than $10k!

According to Marc's definition, my ducted fan isn't really a ducted fan. It is a shrouded propeller. The equations were developed assuming long ducts, it makes the math easier. But I used them anyway.

-- 
Perry Mick
Custom Composite Props
mick@bridgingworlds.com
http://www.ductedfan.com

--------------000809000906020409070201--