Ryansdad/PilotFrog

I agree with you that L.E. shape and C. of G. location are important to spin recovery.

On the aforementioned Tweedy Bird, the L.E. was sharper than Mr. Bridi calls for on the plans and the C. of G. was at the rear most of the range.

Even with all of that it blew my mind that this thing had such terrible spin recovery traits. With all that rudder below the vert.stab and generous horizontal tail volume I thought that recovery would be immediate or faster!

As far as (intentional) snaps go - WOW. As far as snapping on landing - never. ( Of course I never tried to grag it in like you can with a Kaos!) Knife Edge was coast to coast, Loops, what ever size you wanted. Power was a MECOA .32 w/ stock muffler.

As far as warps nope- no warps.

As far as any other D.B.'s the other one is my friend's, now that's going back 20 years. So no particulars on that one.

Would I build another You better belive it. I'll have one for next spring. I've built and flown several other Bridi designs and love all of them. I did want to improve the snap performance so possibly I did sharpen L.E too much, but I don't think so?

Finally, I'm not saying that the 2M D.B. will have this trait, however, my purpose in jumping in on this thread was to inform of my experience with a similar although smaller version of the airplane in question and that if it did have a similar characteristic it would be nice to learn about it with an extra 100 feet or so of altitude. Of course I think it's a good idea to investigate a new planes habits alittle higher than normal even if it's a "proven" design. Just my opinion.

Mark