RE: [RCSE] Re: Soaring V1 #7744
Legend has an earlier airfoil, S3021. At 09:06 PM 6/3/2006, Winch wrote: ... A Legend (TD task) has a need for several speeds but not an extreme range. I can't remember exactly but a Legend probably has something like a SD7037 foil. I would expect about a 3% camber so an incidence of 1.5 degrees would be indicated. A rule of thumb is only a starting point, test flying is the proof. Phil in Vancouver -Original Message- From: Ed Anderson [mailto:[EMAIL PROTECTED] Sent: June 3, 2006 2:16 PM To: Soaring@airage.com Subject: [RCSE] Re: Soaring V1 #7744 Looking for Advice on Wing Incidence. I am looking forward to flying in the June ESL event at LISF on Long Island. I hope to see some of you there. I have a old yellow and blue Airtronics Legend that I am trying to tune up. I picked up a wing incidence meter and am trying to set the wing/h-stab incidence. I don't have a recommended spec so I am trying to shoot for something reasonable. If I set the stab at 0 degrees on my GP incidence meter, the wing measures 1.5 degrees below the zero. I guess that would be 1.5 degrees positive relative to the stab, correct? Any recommendations on a good starting target? It used to be more but I added 1/32 in shims under the rear wing hold down to raise the back of the wing about 6 months ago and it seemed to fly better. So I bought the incidence meter and want to set it correctly. Unfortunately I have no idea if I am right on the money or way off. I have the build manual but there is no recommendation in the book. Would a 0 degree difference between the wing and the stab be a reasonable starting point? I am thinking that there should be some difference but I may have too much. I hope to be able to upgrade to a Mantis or similar by the end of the summer, but for now this is what I have to fly. Until then, I will chalk up the work I do on this plane as a learning experience. Any advice would be appreciated. Best Regards, Ed Anderson Long Island Silent Flyers [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
[RCSE] Re: Soaring V1 #7744
Looking for Advice on Wing Incidence. I am looking forward to flying in the June ESL event at LISF on Long Island. I hope to see some of you there. I have a old yellow and blue Airtronics Legend that I am trying to tune up. I picked up a wing incidence meter and am trying to set the wing/h-stab incidence. I don't have a recommended spec so I am trying to shoot for something reasonable. If I set the stab at 0 degrees on my GP incidence meter, the wing measures 1.5 degrees below the zero. I guess that would be 1.5 degrees positive relative to the stab, correct? Any recommendations on a good starting target? It used to be more but I added 1/32 in shims under the rear wing hold down to raise the back of the wing about 6 months ago and it seemed to fly better. So I bought the incidence meter and want to set it correctly. Unfortunately I have no idea if I am right on the money or way off. I have the build manual but there is no recommendation in the book. Would a 0 degree difference between the wing and the stab be a reasonable starting point? I am thinking that there should be some difference but I may have too much. I hope to be able to upgrade to a Mantis or similar by the end of the summer, but for now this is what I have to fly. Until then, I will chalk up the work I do on this plane as a learning experience. Any advice would be appreciated. Best Regards, Ed Anderson Long Island Silent Flyers [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] Re: Soaring V1 #7744
Ed, Your notion to set the stab 1.5 degrees negative to the wing is a good starting point - particularly if you are an intermediate pilot with a more stable CG. You could also set it at 0 degrees and then fly the plane while adjusting your elevator trim for a slow pull out from a speed run. After you have flight tested that trim point you can shim the stab to take any up or down deflection out of the elevator. (You can do the same thing with a 1.5 degree setting but it may be a bit more difficult to feel the right trim point.) This should give you a good flying plane. Hope this helps Rick At 05:15 PM 6/3/06, Ed Anderson wrote: Looking for Advice on Wing Incidence. I am looking forward to flying in the June ESL event at LISF on Long Island. I hope to see some of you there. I have a old yellow and blue Airtronics Legend that I am trying to tune up. I picked up a wing incidence meter and am trying to set the wing/h-stab incidence. I don't have a recommended spec so I am trying to shoot for something reasonable. If I set the stab at 0 degrees on my GP incidence meter, the wing measures 1.5 degrees below the zero. I guess that would be 1.5 degrees positive relative to the stab, correct? Any recommendations on a good starting target? It used to be more but I added 1/32 in shims under the rear wing hold down to raise the back of the wing about 6 months ago and it seemed to fly better. So I bought the incidence meter and want to set it correctly. Unfortunately I have no idea if I am right on the money or way off. I have the build manual but there is no recommendation in the book. Would a 0 degree difference between the wing and the stab be a reasonable starting point? I am thinking that there should be some difference but I may have too much. I hope to be able to upgrade to a Mantis or similar by the end of the summer, but for now this is what I have to fly. Until then, I will chalk up the work I do on this plane as a learning experience. Any advice would be appreciated. Best Regards, Ed Anderson Long Island Silent Flyers [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
Re: [RCSE] Re: Soaring V1 #7744
Ed, You have two ways to determine correct decalage (difference between wing and stab incidence). The first is to trim the plane for level flight at low cruising speed. If the elevator is up you need to reduce wing incidence and if its down you need to increase it. The other method is to observe whether the plane looks right in level flight at thermaling speeds. If it flies tail low you increase wing incidence, and of you can, stab incidence. If it flies tail high you decrease wing and stab incidence. With the Legend you can't get both right because the stab is fixed. Incidence is actually not that important as long as it isn't way off. See you in three weeks! Anker At 05:15 PM 6/3/2006, Ed Anderson wrote: Looking for Advice on Wing Incidence. I am looking forward to flying in the June ESL event at LISF on Long Island. I hope to see some of you there. I have a old yellow and blue Airtronics Legend that I am trying to tune up. I picked up a wing incidence meter and am trying to set the wing/h-stab incidence. I don't have a recommended spec so I am trying to shoot for something reasonable. If I set the stab at 0 degrees on my GP incidence meter, the wing measures 1.5 degrees below the zero. I guess that would be 1.5 degrees positive relative to the stab, correct? Any recommendations on a good starting target? It used to be more but I added 1/32 in shims under the rear wing hold down to raise the back of the wing about 6 months ago and it seemed to fly better. So I bought the incidence meter and want to set it correctly. Unfortunately I have no idea if I am right on the money or way off. I have the build manual but there is no recommendation in the book. Would a 0 degree difference between the wing and the stab be a reasonable starting point? I am thinking that there should be some difference but I may have too much. I hope to be able to upgrade to a Mantis or similar by the end of the summer, but for now this is what I have to fly. Until then, I will chalk up the work I do on this plane as a learning experience. Any advice would be appreciated. Best Regards, Ed Anderson Long Island Silent Flyers [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format Anker Berg-Sonne [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
RE: [RCSE] Re: Soaring V1 #7744
Some years ago, I asked the same question and the best answer I got was 1/2 the camber. If you think about it, it kind of makes sense. A thick flat bottomed foil tends to be a one speed floater while a thin symmetrical one is seen on slope rockets. It therefore falls out that incidence (foil/speed range) is dependent on the plane's usage. A Legend (TD task) has a need for several speeds but not an extreme range. I can't remember exactly but a Legend probably has something like a SD7037 foil. I would expect about a 3% camber so an incidence of 1.5 degrees would be indicated. A rule of thumb is only a starting point, test flying is the proof. Phil in Vancouver -Original Message- From: Ed Anderson [mailto:[EMAIL PROTECTED] Sent: June 3, 2006 2:16 PM To: Soaring@airage.com Subject: [RCSE] Re: Soaring V1 #7744 Looking for Advice on Wing Incidence. I am looking forward to flying in the June ESL event at LISF on Long Island. I hope to see some of you there. I have a old yellow and blue Airtronics Legend that I am trying to tune up. I picked up a wing incidence meter and am trying to set the wing/h-stab incidence. I don't have a recommended spec so I am trying to shoot for something reasonable. If I set the stab at 0 degrees on my GP incidence meter, the wing measures 1.5 degrees below the zero. I guess that would be 1.5 degrees positive relative to the stab, correct? Any recommendations on a good starting target? It used to be more but I added 1/32 in shims under the rear wing hold down to raise the back of the wing about 6 months ago and it seemed to fly better. So I bought the incidence meter and want to set it correctly. Unfortunately I have no idea if I am right on the money or way off. I have the build manual but there is no recommendation in the book. Would a 0 degree difference between the wing and the stab be a reasonable starting point? I am thinking that there should be some difference but I may have too much. I hope to be able to upgrade to a Mantis or similar by the end of the summer, but for now this is what I have to fly. Until then, I will chalk up the work I do on this plane as a learning experience. Any advice would be appreciated. Best Regards, Ed Anderson Long Island Silent Flyers [EMAIL PROTECTED] RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format RCSE-List facilities provided by Model Airplane News. Send subscribe and unsubscribe requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. Email sent from web based email such as Hotmail and AOL are generally NOT in text format
