Bernie Hunt's Big Square 55 cm F1D


Drawing of Bernard Hunt's F1D55 model - scroll down to see material sizes, click on the picture to see a 123 kb version of this drawing.


 

MATERIALS (dimensions in thou):
Wing Main spars 5 - 5,5 lb. 100 x 35 -> 63 x 35 (109 mg/pair)
Tip spars 5 - 5,5 lb. 60 x 35 -> 30 x 35
Main ribs 4,5 lb. 46 x 24 -> 65 x 24 -> 45 x 24 (Andrews)
Tips 5 - 5,5 lb. 35 x 35
Tail Main spars 5 - 5,5 lb. 58 x 30 -> 40 x 30 (55 mg/pair)
Tip spars 5 - 5,5 lb. 40 x 30 -> 30 x 30
Tips 5 - 5,5 lb. 30 x 30
Ribs 4,5 lb. 30 x 23
Stick Stick 4,3 lb. 0,013" x 0,76" x 13"rolled on 0,22" former + 4 x 0,004" Boron
Bracing 5 lb. Post 1.25" x 0,040 -> 0,025", 0,001" tungsten brace
Bearing Harlan front bearing, 0,013" wire rear hook, 0,020" webs
Wing posts (integral with stick) 6 lb. 0,067 x 0,050 + 2 x 0,004" Boron
Paper tubes 0,060" dia - tubes are on wing
Stub boom 4,5lb 1,5" tube x 0,009" to fit boom; 0,25" inner sleeve for join to stick
Boom Boom 4,3 lb. 18" x 0,009" x 0,74" -> 0,45" + 3 x 0,003" Boron
Tail posts 6 lb. 1,0" x 0,06" x 0,040" + 2 x 0,004" boron
Paper tubes on tail 0,045" dia
Prop Spar 6 lb. 0,06 x 0,06 -> 0,025" x 0,25"
Ribs 5 lb. 0,03 x 0,025 -> 0,023" x 0,025" (Andrews)
Outline 4,5 lb. 0,023" x 0,023"
Own design VP mechanism, blades Steve Brown shape 8" long

Weights (grams)
Stick
0,31

Wing
0,31
(Frame 0,24)
Boom
0,15

Tail
0,14
(Frame 0,098)
VP Prop
0,26
(Fixed pitch 0,18)
Ballast
0,03
(0,11)
Total
1,20

Motor
0,052" x 8,7" loop 0,59 gram - 1560 turns.
Travel box
Dimensions: 23" x 9" x 8" (3 models).
Wing and tails on slider on the bottom of each slot; sticks on top. Props and booms in wider top slot.