Hi Jim

Just to clarify, I didn't mean flat like some of those British section designs, rather thin - relative to the Peacemaker and Smousen, or full size Flite Streak - all of which are quite fat sectioned in comparison.

eg: Akromaster. Whilst still shaped, its aerofoil is remarkably thinner and smaller overall than the Peacemaker's for only 50²in less area. Both ships end up weighing in pretty much the same, but IME the Peacemaker can carry an extra two ounces without a murmur because of its wing. Even accounting for the faster speed of the Akromaster, it doesn't make up sufficiently for the lack of section and area, the latter making it far more weight critical, with of course, the resultant increased radius of loop or higher 'g' and AoA in attempting to achieve an equivalent radius at its higher speed.

As best I recall, the Flite Streak Jnr's wing is notably smaller again than the Akromaster's at around the 220²in in area, pretty much just a fraction larger than the Mini-Peacemaker at 190-200²in (version dependent) both intended for an .09 or .10 on which IME they fly well. All are good flying designs, but those with the higher wing loadings quite weight critical if good performance is to be achieved.