flyrotary@lancaironline.net Mailing List Archive

"it takes 1.6 times as much horsepower to develop 1.18 times as much static thrust! "

I didn't study the site but just this statement is ludicrous. It takes NO horsepower to generate static thrust. A freek'n spring will make static thrust. For our purposes, static thrust is not a useful term and sometimes a dangerous one. Steve (?) Parkman died many years ago mainly because he set his engine and prop up for best static thrust on his airplane prior to his first flight.

Tracy Crook

On Wed, Mar 3, 2010 at 9:18 AM, Bill Bradburry <bbradburry@bellsouth.net> wrote:

Looking at the two sizes of the engine, it takes 1.6 times as much horsepower to develop 1.18 times as much static thrust! Somehow this does not compute for me….I always doubt the performance figures in a sales presentation and when they don’t make sense to me…..???

Bill B (hoping this generates an educational experience for me :>) )

From: Rotary motors in aircraft [mailto:flyrotary@lancaironline.net] On Behalf Of Mike Wills
Sent: Tuesday, March 02, 2010 11:10 PM
To: Rotary motors in aircraft
Subject: [FlyRotary] single rotor

A friend of mine flies a powered paraglider (PPG). He attended a flyin last month and saw this:

http://www.flycyclone.com/range/category/294cc_Everest/

It's a single rotor liquid cooled rotary and available in several different displacements. Do a little web surfing and you'll find some pretty cool videos of guys flying PPGs powered by this.

Mike Wills