You didn't start an argument. You heard a lot of generalizations based to some degree on the perpetuation of old wives tales. The first persons to successfully fly a man carrying airplane flew a biplane. There are some biplanes that are inherently unstable, and that is normally done by design. The S-series Pitts come to mind. If they were stable, they would not fly as aerobatically as they do. The same can be said for a Yak-54, or an Extra 300. These are unstable monoplanes. If you want to fly a biplane for your second plane, then carefully choose one. The Sig Hog Bipe would make a good choice. A good choice for a second monoplane would be a Sig 4-Star. Notice that both are offered by Sig. They build straight and light. These are both good characteristics to be found in any airplane, but especially in one's first or second model. I would reccomend that you not build a scale model of anything for your second model, since scale models tend to amplify the bad things that are appearent in the full scale, plus scale models seldom build light. Trust your feelings toward what you want to build and fly. If you have become competent with your first plane, then there is no reason to turn your back on what you really want to do.

Bill, AMA 4720
WACO Brotherhood #1

And for the benefit of some here, I have been flying R/C since 1957 (that's 51 years). I have 51 years of experience, and not one year of experience, 51 times.

Bill

Oh yeah, here is Mike Barbee (WACO SUPER YMF) at Top Gun on Saturday 26 April 2008. Lakeland Linder Regional Airport. The plane is third scale, and the wind is blowing an average of 20 MPH. I don't know about you, but it looks pretty damn stable to me.