being an old Fart I was flying the old B proto then f 40 and then 21 proto
the old inverted B proto's never had a problem coming in when the newer schnurlly (spelling) engines came out the inverted ships started going away. it didn't take long for the F 40 guys to learn the only way to safely fly inverted was with a left hand crank .the only two I remember doing well were Bill Wisniewski add Jim Rhoades. for a couple of years I flew F 40;s at the nats for Frank Garzon and his N.Y. guys .they were all uprite and u could take off in the pylon if u wanted to.
when 21 proto started there were 4 inverts Barry Tippitt Wayne Trivin ,Chris Sackitt.and myself.most others were uprite.Chris,wayne and Barry had Rossi's and all had problems on take off..on about every 3rd or fourth flight waynes would come in and flip over .had to fly it like an F2C on take off.one time it came across the circle and when it hit the lines on the other side it snapped my shoulder and it has never been the same ,doc says it was a Tommy John thing/.
mine has a custom OPS with a Rossi crank .it didn't have the torque of the Rossi but turned more RPM's I used an F2C prop .3 years in a row I placed 2nd to Glenn Lee's uprite. then it crashed for some un known reason (more on that later)
my next ship was still inverted but with a Rossi.now mine was doing the same thing as the other 3.i had to add more tip weight ,move the leadouts back and go to a smaller prop ,dropping about 3 MPH then it was flyable. I have flown Glenn's uprite and it is A joy to fly'
3 of the ships I have been talking about crashed the same way.Rhoades and Trivin's F-40's and my first 21 proto. all three were were flying level .a little down was given and all 3 went in like the up line had broken.nothing could be found wrong with the controls on any of them
the 40 size inverted Rats never seemed to have these problems but I noticed that they have much bigger Stabs and maybe the smaller F-40 and 21 Proto stabs are loosing lift because of the cowl on the under side
as a side note ,originally Sub Rudders were not aloud on 21 protos .today all F-40's and 21 proto's have sub rudder's
I know this is long, I hope it makes some sense .Rad the OLD MSN