Im working on trimming my Showtime 50 using Peter Goldsmith's methods. In the article it mentions blowback. My question is, when exiting a snap roll, what should the exit look like? When I do a snap roll, it mushes to the right on exit. Wondering if I have blowback due to the pressure on the servos or maybe Im doing it wrong. Thanks

Blowback or blowdown is caused by pushrods that have the consistancy of wet noodles and flex or bend under compression load. Any bends at all will also contributre to this. To have a rock solid link if a single push/pull type must be perfectly straight from servo arm to to surface horn and any fuselage exit holes must be in the appropriate location Which often on many arfs they are not and you are expected to bend the rod ends a little assuring that your airplane will have some blowdown.

With a properly set up aerobatic model the snap should pretty much stop dead when the sticks are neutralized. There may be a very slight delay, but it's very slight. Almost imperceptable unless you're an aerobatics guru.

If you mean that the controls feel "mushy" it is likely that the snap roll has slowed the plane almost to stall, and you've stalled one of the wings during the snap. This is very easy to do with higher throws.

Try lowering your throws or rate to avoid this.

THATS EXACTLY IT OPJOSE. ILL WORK ON IT. THANKS! I THOUGHT IT WAS SUPPOSED TO BE LIKE THIS. GUESS NOT!

Is this why I go right into a hover after a snap roll?

At 45 degree or greater climb then a snap or a wack lomcevac
I go into an inverted flat spin becuase I can't make it hover, but it'll hang for a moment.

If you do a snap on top of a loop it's call an avalanche. It's hard to make it look purdy at first becuase you're
snaping the model when it's inverted.