RIGHT , We've solved it .
6 mm slack at T.E. of Elevator did it , nicely .
Thought Id better relate the trial , as it may help some other sucker . . .
Put in the 1/8 Elevator Horn , same as before - inverted It'd pick up a pitch / up - down , after a few laps . Or related to how ' with it ' the pilot was . Coll calm & collected it might not do it , perhaps . . .
Ploughing through old A M A - M.A. info , found one relating Al Rabe ran the ' Dead Zone ' Tailplane , and Bob Gieske thought 1/8 to 1/4 freeplay at T E ( NONE at Flap ) essential .
As Id contemplated it during construction , AFTER having tried 4 Oz ( Stalled in Sqs , ) 1 1/2 , 1 ( good ) , & 1/2 (o.k. ) & zero ( or Minus if you consider No Cowl ) on the sucker ,
with the STALKER 66 in it now . Also on a 13 x 6 with rounded T E Tips , it went VERY Light on Insides , moreso with the noseweight . The Olde 'P' effect evident , we presume .
Seems happy on a 12 x 5 T F wood . Wont slow down on a 6 in pitch . Tho alledgedly the Proto 66 , so not neccesarilly applicable to all of em . ANYWAY the 12/5s good here . Summer .
Carved out the rear last week to bush the rear horn or something . THIS week after a hours hunt ( it was on the floor by the vice ! ) at midnight installed a 3/16 K&S brass tube !
FLATTENED to accept a pair of 3/32 drill bits . . I.E. , the ' bush ' is 3/32 x 3/16 , - giving 3/32 ' freeplay ' at the horn ' 3:1 ratio Horn to ( 3" ) Chord .
Still Cowl Off , the suckers ' got a groove ' , and at maybe 20% chord C.of G. , thereabouts .
Gotta mould for a new cowl half done , am En Route for more F'Glass cloth . Stalker Cyl is more aftish & R E . So C G may be spot on
with it fitted . Tho a new smaller tank may stuff that .Slightly .
A few patches & a bit of tarting up required .
Co-Ercced a Ace to handle a Flight .Was a few loops and straight into Sq Eights . Nice straight clean even ones . So seems o.k. Though Advice Was to Close Handle Spacing . ( any irregularities in
the wrist wobble gets it following em in such as the Over Heads .
So Basically It Good Now . Do the Cowl & tart up a few patches . New Smaller ( 135 cc ) Tank . Maybe a half ounce ( 15 g ) of Nose Weight . Tho spinner / prop combo may cover that there .
PLUS She's got a bloody tight corner in the Squares.
near 1:1 Ratio on the controls . Same deflection from center ( 1 7/8 ) flaps & elevator . TOTAL , so a tad more as the 6 mm slacks a notch there .