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Sparrow Strainers
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damiantwinsport@...
In a message dated 11/1/2003 5:13:41 PM Pacific Standard Time,
rondefly@... writes: http://bld01.ipowerweb.com/contentmanagement/websites/rtrianoc/page3.htmlRon I appreciate the postings and progress pics . What is the purpose of the "Sparrow Strainers" Regards, Damian Gregory
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rondefly <rondefly@...>
Now they are in place, I am starting to detail all the little spots
everywhere to get ready for paint. You can see the strainers on my web link below and I also will upload them to the Q list photo's under (Changing) Ron Triano, Quickerone http://bld01.ipowerweb.com/contentmanagement/websites/rtrianoc/page3.html
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rondefly <rondefly@...>
They are part of the origional design and necessary. Since I did not build
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this from zero, My understanding is they aid the airflow over the elevator's. Maybe some of the flying Q's will give us the exact job they do. Ron Triano, Quickerone http://bld01.ipowerweb.com/contentmanagement/websites/rtrianoc/page3.html
-----Original Message-----
From: damiantwinsport@... [mailto:damiantwinsport@...] Sent: Saturday, November 01, 2003 5:25 PM To: Q-LIST@... Subject: Re: [Q-LIST] Sparrow Strainers In a message dated 11/1/2003 5:13:41 PM Pacific Standard Time, rondefly@... writes: > http://bld01.ipowerweb.com/contentmanagement/websites/rtrianoc/page3.html > Ron I appreciate the postings and progress pics . What is the purpose of the "Sparrow Strainers" Regards, Damian Gregory Yahoo! Groups Sponsor To unsubscribe from this group, send an email to: Q-LIST-unsubscribe@... Quickie Builders Association WEB site http://www.quickiebuilders.org Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
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David J. Gall
Ron,
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I don't have a flying Q, but I'll try to answer your question. Sparrow strainers are like big, fixed trim tabs. They make it possible for you to pull enough up elevator to fly. They also increase "stick-free" pitch stability. They are mandatory for flight if you have the LS-1 canard. Flying without them could leave a permanent mark.... David J. Gall BSAE, Comm Inst ASMEL, AGI, CFIAI (expired) Quickie kit owner
-----Original Message-----
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rondefly <rondefly@...>
Thanks Dave
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Ron Triano, Quickerone http://bld01.ipowerweb.com/contentmanagement/websites/rtrianoc/page3.html
-----Original Message-----
From: David J. Gall [mailto:David@...] Sent: Saturday, November 01, 2003 6:21 PM To: Q-LIST@... Subject: RE: [Q-LIST] Sparrow Strainers Ron, I don't have a flying Q, but I'll try to answer your question. Sparrow strainers are like big, fixed trim tabs. They make it possible for you to pull enough up elevator to fly. They also increase "stick-free" pitch stability. They are mandatory for flight if you have the LS-1 canard. Flying without them could leave a permanent mark.... David J. Gall BSAE, Comm Inst ASMEL, AGI, CFIAI (expired) Quickie kit owner > -----Original Message----- > From: rondefly [mailto:rondefly@...] > Sent: Saturday, November 01, 2003 8:31 PM > To: Q-LIST@... > Subject: RE: [Q-LIST] Sparrow Strainers > > > They are part of the origional design and necessary. Since I did not build > this from zero, My understanding is they aid the airflow over the > elevator's. Maybe some of the flying Q's will give us the exact > job they do. Yahoo! Groups Sponsor To unsubscribe from this group, send an email to: Q-LIST-unsubscribe@... Quickie Builders Association WEB site http://www.quickiebuilders.org Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
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Peter Harris <peterjfharris@...>
Ron,
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As I understand it the small airfoil on the sparrow strainer provides some counter lift to lessen the load when the elevator is pulled down into the airstream. Peter
----- Original Message -----
From: David J. Gall To: Q-LIST@... Sent: Sunday, November 02, 2003 12:21 PM Subject: RE: [Q-LIST] Sparrow Strainers Ron, I don't have a flying Q, but I'll try to answer your question. Sparrow strainers are like big, fixed trim tabs. They make it possible for you to pull enough up elevator to fly. They also increase "stick-free" pitch stability. They are mandatory for flight if you have the LS-1 canard. Flying without them could leave a permanent mark.... David J. Gall BSAE, Comm Inst ASMEL, AGI, CFIAI (expired) Quickie kit owner > -----Original Message----- > From: rondefly [mailto:rondefly@...] > Sent: Saturday, November 01, 2003 8:31 PM > To: Q-LIST@... > Subject: RE: [Q-LIST] Sparrow Strainers > > > They are part of the origional design and necessary. Since I did not build > this from zero, My understanding is they aid the airflow over the > elevator's. Maybe some of the flying Q's will give us the exact > job they do. Yahoo! Groups Sponsor To unsubscribe from this group, send an email to: Q-LIST-unsubscribe@... Quickie Builders Association WEB site http://www.quickiebuilders.org Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
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rondefly <rondefly@...>
Thanks Peter.
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Ron Triano, Quickerone http://bld01.ipowerweb.com/contentmanagement/websites/rtrianoc/page3.html
-----Original Message-----
From: Peter Harris [mailto:peterjfharris@...] Sent: Sunday, November 02, 2003 1:22 PM To: Q-LIST@... Subject: Re: [Q-LIST] Sparrow Strainers Ron, As I understand it the small airfoil on the sparrow strainer provides some counter lift to lessen the load when the elevator is pulled down into the airstream. Peter ----- Original Message ----- From: David J. Gall To: Q-LIST@... Sent: Sunday, November 02, 2003 12:21 PM Subject: RE: [Q-LIST] Sparrow Strainers Ron, I don't have a flying Q, but I'll try to answer your question. Sparrow strainers are like big, fixed trim tabs. They make it possible for you to pull enough up elevator to fly. They also increase "stick-free" pitch stability. They are mandatory for flight if you have the LS-1 canard. Flying without them could leave a permanent mark.... David J. Gall BSAE, Comm Inst ASMEL, AGI, CFIAI (expired) Quickie kit owner > -----Original Message----- > From: rondefly [mailto:rondefly@...] > Sent: Saturday, November 01, 2003 8:31 PM > To: Q-LIST@... > Subject: RE: [Q-LIST] Sparrow Strainers > > > They are part of the origional design and necessary. Since I did not build > this from zero, My understanding is they aid the airflow over the > elevator's. Maybe some of the flying Q's will give us the exact > job they do. Yahoo! Groups Sponsor To unsubscribe from this group, send an email to: Q-LIST-unsubscribe@... Quickie Builders Association WEB site http://www.quickiebuilders.org Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. Yahoo! Groups Sponsor To unsubscribe from this group, send an email to: Q-LIST-unsubscribe@... Quickie Builders Association WEB site http://www.quickiebuilders.org Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
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In a message dated 11/2/2003 3:00:09 PM Mountain Standard Time,
peterjfharris@... writes: Ron, As I understand it the small airfoil on the sparrow strainer provides some counter lift to lessen the load when the elevator is pulled down into the airstream. Peter To all, The small upside down clark airfoil attached behind the elevator (commonly called sparrow strainers) are fixed to pull the elevator down so it is in trail with the airfoil. This is required because the elevator sees the same wing loading as the rest of the canard and wants to pivot upward around the hinge line. Allowing this to pivot up by letting one of your sparrow strainers come off in flight results in a DIVE unless you hold back pressure on the stick. The pressure is manageable but you don't want to go too far before correcting it. Once the elevator is close to flying where it should with a stick free shallow climb, the spring trimmer is dialed in with a bit of down force on the elevator to trim to level flight. The whole mess is quite touchy to get just right, I am still messing with mine 5 years after I got the plane, it is a Dragonfly but sparrow strainers are the same on both planes. Regards, One Sky Dog
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Bob Farnam <bfarnam@...>
If I can expand on David's note a little. The LS1 airfoil has an
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undercambered lower surface with a fairly large pitching moment. When the trailing edge is hinged to act as an elevator, the trailing edge wants to streamline up from it's original position. The sparrow strainers are fixed trim tabs that counteract that force and push the trailing edge back into it's proper position. That relieves the load that would otherwise be countered with trim springs and/or stick force. Since it is aerodynamic instead of mechanical, the force increases with increasing airspeed at the same time that more force is needed. This is how I think of the effect they have on pitch stability. It is also my belief (unverified) that they are place inboard in the prop blast to help counter pitch down with increasing power. David? Bob Fl N200QK
-----Original Message-----
From: David J. Gall [mailto:David@...] Sent: Saturday, November 01, 2003 6:21 PM To: Q-LIST@... Subject: RE: [Q-LIST] Sparrow Strainers Ron, I don't have a flying Q, but I'll try to answer your question. Sparrow strainers are like big, fixed trim tabs. They make it possible for you to pull enough up elevator to fly. They also increase "stick-free" pitch stability. They are mandatory for flight if you have the LS-1 canard. Flying without them could leave a permanent mark.... David J. Gall BSAE, Comm Inst ASMEL, AGI, CFIAI (expired) Quickie kit owner > -----Original Message----- > From: rondefly [mailto:rondefly@...] > Sent: Saturday, November 01, 2003 8:31 PM > To: Q-LIST@... > Subject: RE: [Q-LIST] Sparrow Strainers > > > They are part of the origional design and necessary. Since I did not build > this from zero, My understanding is they aid the airflow over the > elevator's. Maybe some of the flying Q's will give us the exact > job they do. Yahoo! Groups Sponsor To unsubscribe from this group, send an email to: Q-LIST-unsubscribe@... Quickie Builders Association WEB site http://www.quickiebuilders.org Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
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rondefly <rondefly@...>
Thanks for the help Bob and David, I just installed them as per the drawings
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and added 1" to the arms per Al Kittleson. You can see pictures of them on my web site and also the photo's section of the Q list. Ron T Ron Triano, Quickerone http://bld01.ipowerweb.com/contentmanagement/websites/rtrianoc/page3.html
-----Original Message-----
From: Bob Farnam [mailto:bfarnam@...] Sent: Sunday, November 02, 2003 3:20 PM To: Q-LIST@... Subject: RE: [Q-LIST] Sparrow Strainers If I can expand on David's note a little. The LS1 airfoil has an undercambered lower surface with a fairly large pitching moment. When the trailing edge is hinged to act as an elevator, the trailing edge wants to streamline up from it's original position. The sparrow strainers are fixed trim tabs that counteract that force and push the trailing edge back into it's proper position. That relieves the load that would otherwise be countered with trim springs and/or stick force. Since it is aerodynamic instead of mechanical, the force increases with increasing airspeed at the same time that more force is needed. This is how I think of the effect they have on pitch stability. It is also my belief (unverified) that they are place inboard in the prop blast to help counter pitch down with increasing power. David? Bob Fl N200QK -----Original Message----- From: David J. Gall [mailto:David@...] Sent: Saturday, November 01, 2003 6:21 PM To: Q-LIST@... Subject: RE: [Q-LIST] Sparrow Strainers Ron, I don't have a flying Q, but I'll try to answer your question. Sparrow strainers are like big, fixed trim tabs. They make it possible for you to pull enough up elevator to fly. They also increase "stick-free" pitch stability. They are mandatory for flight if you have the LS-1 canard. Flying without them could leave a permanent mark.... David J. Gall BSAE, Comm Inst ASMEL, AGI, CFIAI (expired) Quickie kit owner > -----Original Message----- > From: rondefly [mailto:rondefly@...] > Sent: Saturday, November 01, 2003 8:31 PM > To: Q-LIST@... > Subject: RE: [Q-LIST] Sparrow Strainers > > > They are part of the origional design and necessary. Since I did not build > this from zero, My understanding is they aid the airflow over the > elevator's. Maybe some of the flying Q's will give us the exact > job they do. Yahoo! Groups Sponsor To unsubscribe from this group, send an email to: Q-LIST-unsubscribe@... Quickie Builders Association WEB site http://www.quickiebuilders.org Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. Yahoo! Groups Sponsor To unsubscribe from this group, send an email to: Q-LIST-unsubscribe@... Quickie Builders Association WEB site http://www.quickiebuilders.org Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
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damiantwinsport@...
Sky Dog, Thanks for the great understandable explanation of the device.
Regards, Damian Gregory
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David J. Gall
Bob,
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Absolutely! Good explanation. I especially like your thought about why they're inboard. As usual, you make very good sense. David J. Gall
-----Original Message-----
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Peter Harris <peterjfharris@...>
Thanks Sky Dog. That is clear.
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Peter
----- Original Message -----
From: OneSkyDog@... To: Q-LIST@... Sent: Monday, November 03, 2003 1:24 PM Subject: Re: [Q-LIST] Sparrow Strainers In a message dated 11/2/2003 3:00:09 PM Mountain Standard Time, peterjfharris@... writes: Ron, As I understand it the small airfoil on the sparrow strainer provides some counter lift to lessen the load when the elevator is pulled down into the airstream. Peter To all, The small upside down clark airfoil attached behind the elevator (commonly called sparrow strainers) are fixed to pull the elevator down so it is in trail with the airfoil. This is required because the elevator sees the same wing loading as the rest of the canard and wants to pivot upward around the hinge line. Allowing this to pivot up by letting one of your sparrow strainers come off in flight results in a DIVE unless you hold back pressure on the stick. The pressure is manageable but you don't want to go too far before correcting it. Once the elevator is close to flying where it should with a stick free shallow climb, the spring trimmer is dialed in with a bit of down force on the elevator to trim to level flight. The whole mess is quite touchy to get just right, I am still messing with mine 5 years after I got the plane, it is a Dragonfly but sparrow strainers are the same on both planes. Regards, One Sky Dog Yahoo! Groups Sponsor ADVERTISEMENT To unsubscribe from this group, send an email to: Q-LIST-unsubscribe@... Quickie Builders Association WEB site http://www.quickiebuilders.org Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service.
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