On the Elevator and stab you said and increase of and inch, (span or chord, elevator or stab?) and travel helped?
Wow..Kinda SOBERING to see that was waaaaaaaaaaaaaaaaaaaaaaaaaaaaay back in 1966
42YEARS AGO...
However all I did was to take Lew's stab was to take a small piece of thick mylar stock...drill a small hole 1/2 inch away from the edge. Then all I did was insert the tip of pencil...and then proceeded to slide it around the outline of Lew's original stab outline?
That alone would perhaps would have been all that was necessary...since I was VERY CONCERNED ABOUT ADDING TO THE "BAR-BELL EFFECT" that could happen soooooooo easily many of the designs of that period.
Tim Dunlop, Ben Madsen, Joe Dill...all AVID LEW McFARLAND DECIPALS' were always ADVOCATING that ANYONE, ESPECIALLY ON THE SHARK DESIGN..with all THAT HUGE BODY SIDE AREA, located that far behind the CG....SHOULD MAKE EVERY KNOW EFFORT TO KEEP THE WEIGHT AS LOW AS POSSIBLE!
Most turning and cornering problems that occurred on the Shark (n' many other designs) could be eliminated if one STOPPED ADDING WEIGHT TO THE NOSE of a design that could lend it self to being tail heavy with all that long and beautifully sculpted aft side area...this alone if not care attention and thought given to building as light as possible . DAAAAA!!! THE FIRST BASIC RULE CLPA101 SCHOOL OF STUNT DESIGN?
Following there advice...(and since I had a very light weight K&B 45 and a very light weight tank...I REALLY TOOK EVERY MEASURE to keep that weight on the aft body section of the Shark 45 to a bare minimum.
Thinking back...IF I had taken as much time in keeping the stab n' elevators in PERFECT ALIGNMENT as I did in keeping the weight down.
I know now that I didn't need to have more ELEVATOR THROW in that new slightly oversized stab and elevator. (The added elevator throw...plus the slight misalignment of the stab...gave me more trouble.that I needed. I did manage to correct the alignment with a little minor surgery.
However the fate of that model was SEIZED by my lack of ability to JUDGE DISTANCE.
See the aftermat crash photos of flying into crowd contro barriers on a circle that was laid out with 60ft lines in mind instead of my 73 foot lines :)
Again...I didn't follow the CARDINAL RULE of CLPA and forgot that a flyer should never make more than one correctional change at a time....when working out trim changes.
AFTER ALL THESE YEARS...ONE MAJOR REGRET STAND OUT!!!
I HAVE NEVER BUILT A STUNT MODEL THAT WAS TOO LIGHT IN WEIGHT!!!