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
