This is a Clockwise rotational ship .
Pictures by Warren Leadbeater back at the 2008 nats . Scores 2/10 or 5/8 of sfa . Avg about 150 .
Last pic tells the story . Temp was up around 40 C / 10-4 F . If you want thermal shock , jump in the pool at night .
Had only been airbourne once previously and Offical was its 2nd flight . Into Wingover was grit the teeth & bear it ,
somewhat relieved it manadged it without loosing an engine, YET . Manadged that in the Sq Eights , if not before .
See the 11 x 5s put on 5 minutes before the Last flight there . TWO minutes to go and they decide theyre binding on the Cowls .
Dunno what I threw on . 9 x 6 grish 3 blades earlier . The 10 x 4s work quite well ( we Later Found ) Wingovers and loops on the outer .
Not really expected with the 21 in thrustline seperation . Might get a picture of the wing remains . I was left outside in the rains out west , during the next nats,
Where the Country was going up in smoke around the place , buishfires & high temps down on the boarder , Vic / Nsw .
So the New Silver with B & W stripes got a bit of punishment and dampness got in generally , but still flew flaT / STRAIGHT , AS CRINKLED UP BUT NOT WARPED .
oh dear . Carving warped sheeting off , after having chopped the booms ( unnessasarilly ) for a move a few years back ( the sides were stuffed about the joints too )
has only really left the spars worth recovering . If That ( why bother using em - It'd have to fly clockwise if I do
) Though the Tailplanes Good .
The thing'd been built over four weeks in trying conditions , as a ' Experimental ' To Provide a bit of info . ( How NOT to do it
)
SO , the next one'd have a acetate centre ( cockpit ) nacelle ( only structural bit there'd be the node leg mount plus * ). Slightly ( 2 in odd ) shorter booms . Just 1/2 Sq for Tailplane spars .
( If Anyones Figured the Best P-38 Taiulplane / elevator set up , Id Like to KNOW . Please ) Im figureing Fixed ' outer ' and larger elevator would help by BEING SIMPLER thus LIGHTER and as stiff of STIFFER .)
Some Sheet lite ply Knock Offable Retract U / Carrage mounts . Moulded Booms , Frame type fins , and with really nice P-38 A cowls , electric engines . Mainly cause theyed fit in those artistic cowlings ,
which are a lot cleaner than J type cowls , which any I.C.E. would fit in .
AND the laterall polar moment * * * ' We ' can chuck all the storage cells on the centerline , with a longitudinal sliding mount
the frigging C.G. ( fore & Aft ) is no bloddy problem . Also big 120 cc tanks & Mufflers and Bearers for OS 35s Times Two , adds to much UNNESSESARY weight . ( plus I can put the props in the scale posn relative to the canopy )
A few blokes up Queensland saw it do the scedule , more or less . Sure Id manadged it a Musswellbrook one time too , Maybe the Vets ?? Can Recall doing the in / out turn comparo there . Fly a Normal Triangle / Hourglass ,
a backward bakward one , The Wheels pull the sucker tighter on ' hard nose down ' tuurns . Which if its upside down in the bottom of a reversed hourglass you get less sag ( none ) as the Dihedrals got the inward airfolow
thing happening , as whell as the big ballon tyres acting as Anchors . Hard Insides it'll say a few foot , ish . About . More or less depending on how useless the flying is . Dont pull it so tight It'll fly the corner fine .
but its a big plane 2250 metric things plus fuel & humidity , 78 ( and 5/16 ) Span , and as the chords 9 in. Avg that makes it . . .
Think the Airfopils 27 % . whent there to get away from the Two Lap Mewgull ( the Green one used the same wing at 23% airfoil ) . Bigger flapps as the booms divide ( reduce ) them . Gives the Easy Answer : A Profile !
But Thats Too Easy , But'd probly fly so well (and be light ) two pb abc glws ( FP25s , with both going . Remember ONE .35 MaxS will get it over the top . IF you cross all your fingers and twoes , and jump ifits falling on
your head .
( No Wipeouts !
)
Gives you some idea of the thinking behind it , and evaluation .
Care in the trailing edge for the flaps , and making the flaps in one piece & ' loosing ' the bit at the booms . And NOT Clamping it up to s**t there late at night squashing the sheet over the underlaying vernier / brace flat ,
on one side , would avoid agravation . A blankety pushrod back aft on the centerline ( Ya wouldnt see a black carbon one in flight , wouldja . ) would end a lot of fripping around , complexites and many exxesss wire bits
which arnt as light as wood or air , or nothing at all , even .
The Thick wings got good volume and lift , but the glide is a lot less freer than the 23 % wing . Though on THAT the differance in pitch ( Nose Down Trim ) before the wheel fairings were fitted , was most apparent . 7/16 wide legs !
So needs to be built clean ( not all the raged edges about the eppenage , or draggy landing gear ) Eliminate excesses , under 2 kilo should be good in mild winds , and magnificent ( Lift / support ) in calm conditions .
Think its a matter of tuning the fins / side area distribution to elimente yaw in hard turns or into & out off ' pressured ( wind ) ones . Obviously central mass location ( Batteries ) would make a enourmous differance
in the ' G ' effect on mass ( concentrations ) . 6 G's 'd be 60 Oz. ( pluss ) sitting on the front of Ea Boom , as built .
For Your Perusal , then ! Spars are two sheets of 4 x 1/4 x 48 split diagonally , so there about 3 in ( fore and aft , about the high point - trimmed to the sheeting thickness at the edges , 1 in at the tips , only 1/8 thick out there.
Foam I think'd be good . But if THOSE Spars are Going to work ( Hard in rough air ) the need some ' seperator ' . The Latest fully Flapped one with this spar set up has ALL the ribs Grain Vertical between the sheet spars , so is
fairly Ridgid , not like a ornothopia at all .
Last thing is , if it had TWICE the CHORD , it Wouldnt Have Twice the Lift . I hope .
Topic: Lockheed Lightning . / P-38 2M. (Read 1934 times)
