I have seen team-Gilbert progress every year since I first met him..........about 10 years ago. He is definitely on his way to being one of the all-time-greats in our sport. He is also an all-time-great person, just in case you have not met him and his very, very special wife, Colleen.
The Ringmaster 576 (sq inches) was designed by Pat Johnston and Dee Rice about 10 years ago........Pat did the beautiful CAD drawings. I am still flying the original prototype. Everyone that has ever flown it fell in love with it. The first 25 kits of the 576 were done by Mike Gibson on his computer controlled water jet cutter, that he uses in his factory. The results are about the same as a laser, but no burning. The 576 is an exact upscale of the S-1, except for two things. The tail moment is one inch longer and the airfoil was changed to a thicker and very powerful one. Well, I guess you can say three things, as we added flaps, though by conventional standards, the flaps are rather small. Of interest, the un-flapped version flies so close to the flapped one, that I think only an accomplished expert level flier would notice a difference, therefore Pat offers either version in laser cut kits or plans. The 576 is perfect for .46 sized engines. Pat drew up CAD plans for a 526 version, which is perfect for .40 size engines. My original weighed 38 ounces, with an LA .40, but now with an LA .46 and larger tank, it is just under 40 ounces. The 576 article was published in Control Line World magazine about 9 years ago. If you have any interest, here are the links to the article with photos. It is in two parts.
http://www.brotherhoodofthering.info/mbbs22/forums/get-attachment.asp?attachmentid=228 and
http://www.brotherhoodofthering.info/mbbs22/forums/get-attachment.asp?attachmentid=229 Just copy and paste in your https:// window. It should open right away.
Brother of the Ring, Dee