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3 Posts
<SPAN style="COLOR: black; FONT-FAMILY: Arial"><SPAN style="FONT-SIZE: 10pt; COLOR: black; FONT-FAMILY: Arial; mso-fareast-font-family: 'Times New Roman'; mso-ansi-language: EN-US; mso-fareast-language: EN-US; mso-bidi-language: AR-SA"><P class=MsoNormal style="BACKGROUND: white; MARGIN: 0in 0in 0pt; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN style="COLOR: #111111; FONT-FAMILY: Arial"><P class=MsoNormal style="BACKGROUND: white; MARGIN: 0in 0in 0pt; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN style="COLOR: #111111; FONT-FAMILY: Arial">Hello all,<P class=MsoNormal style="BACKGROUND: white; MARGIN: 0in 0in 0pt; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN style="COLOR: #111111; FONT-FAMILY: Arial"><SPAN style="COLOR: #1f5080; FONT-FAMILY: Verdana"><?xml:namespace prefix = o ns = "urn:schemas-microsoft-comfficeffice" /><o></o><P class=MsoNormal style="BACKGROUND: white; MARGIN: 0in 0in 0pt; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN style="COLOR: #111111; FONT-FAMILY: Arial">I saw there was some FOB talk here so I thought I would join in if that is OK. I promise never to try and sell anything. Just answer question and provide information.<P class=MsoNormal style="BACKGROUND: white; MARGIN: 0in 0in 0pt; mso-margin-top-alt: auto; mso-margin-bottom-alt: auto"><SPAN style="COLOR: #111111; FONT-FAMILY: Arial"><SPAN style="COLOR: #1f5080; FONT-FAMILY: Verdana"><o></o><P class=MsoNormal style="BACKGROUND: white; MARGIN: 0in 0in 0pt"><SPAN style="COLOR: #111111; FONT-FAMILY: Arial">My background is Mechanical Engineering. I had spent the better part of 12 years working at a rocket ranch (Hughes Missile Systems). I am also lucky enough to say I have not missed an archery Elk hunt in 25 years. I am even luckier to say it has been with the same group of friends. My thoughts regarding bodies in motion come from crunching the numbers. My thoughts regarding arrow flight comes from hunting and the frustration of getting a broadhead to fly. <SPAN style="COLOR: #1f5080"><o></o><P class=MsoNormal style="BACKGROUND: white; MARGIN: 0in 0in 0pt"><SPAN style="COLOR: #1f5080"> <o></o><P class=MsoNormal style="BACKGROUND: white; MARGIN: 0in 0in 0pt"><SPAN style="COLOR: black; FONT-FAMILY: Arial">The drag the FOB produces (about the same as a 3 inch fletch)is funneled through the ring wing and is turned into lift (360 degree lift) the ring wing acts like an airplane wing but in 360 degrees. So in effect, the FOB is trying to pull itself apart. It is basically an air gyro. It does not lift the back of the arrow; it provides as much lift up as it does down and side to side. All we have done is taken the drag component and used it for good. A fletch provides drag but that is it. After that it is thrown away (wasted energy). Not to get to technical, but the air that enters the FOB is captured by the ring wing and is compressed by the fins which causes the air to become more dense (heavier) and more efficient. At the last 3/4 of the FOB the air is decompressed which creates extra spin. It is the pressure differential of the air inside vs. outside the ring wing that creates circumferential lift.<SPAN style="COLOR: #1f5080"> <o></o><P class=MsoNormal style="MARGIN: 0in 0in 0pt"><P class=MsoNormal style="MARGIN: 0in 0in 0pt">Regards,<P class=MsoNormal style="MARGIN: 0in 0in 0pt"><SPAN style="COLOR: black; FONT-FAMILY: Arial"><o></o>SPECKDECK (10/16/2007)Very interesting. But, I watched the demo videos and had some questions. He claims that the air moving into the circle moves slower than that on the outside producing lift. I'm no expert, but I do make my living flying, and that statement that he made doesn't exactly go along with the laws of physics. Heavier air on the inside produces lift normally. It could reduce drag. Besides, if the air flow is equal all the way around, how does it lift anything. Stabilize maybe, but lift, I don't know??? Interesting concept though. I'd like to see it in action.
Meanwhile, I'm sticking to the blazer 2 inchers!!! If it ain't broke, don't fix it!