You would be hard pressed to find a better RC biplane for aerobatics than an Ultimate Bipe. Funny thing is that the full size was not that good, but the model is fantastic. Probably because the full size was developed with models. The main feature of it's performance is that it has very little cross coupling from one surface to another and will come close to a monoplane in most respects. It (most bipes) excels in rolls but is not as smooth in pitch as (for example) an Extra-300.

Several manufacturers offer them in .46 size, but I can not speak about others than the smaller World Models in.30 (really .46) and the larger 1.20 sizes. Had both (one with a Saito .50 and the other with a Saito 1.50) and liked them as good looking, long wearing ships'

quint