7
Contents
Introduction............................................................................................................. 10
1.1 How to Build Your Aircraft.................................................................................................10
1.2 The BMAA Homebuilt Aircraft System ..............................................................................12
1.3 General Assembly Notes..................................................................................................14
1.4 Finish...............................................................................................................................18
1.5 Weight .............................................................................................................................20
2. Forward Fuselage............................................................................................ 21
2.1 Tube Numbering ..............................................................................................................21
2.2 Fuselage frame assembly overview..................................................................................23
2.3 Lower Cabin Triangle.......................................................................................................25
2.4 Upper Cabin Triangle.......................................................................................................30
2.5 Rear Cabin Frame............................................................................................................33
2.6 Rear cabin frame bracing. ................................................................................................34
2.7Engine Supports...............................................................................................................37
2.8 Floor ................................................................................................................................46
2.9 Rudder Pedals .................................................................................................................48
2.10 Control Stick Assembly.....................................................................................................49
2.11 Finishing the Forward Fuselage........................................................................................52
3Rear Fuselage.................................................................................................. 54
3.1 Tail End............................................................................................................................54
3.2 Bracing Frame .................................................................................................................56
3.3 Front End.........................................................................................................................57
3.4 Fuselage bracing cables...................................................................................................58
3.5 Tailplane Front Mounting..................................................................................................63
3.6 Fuel Tank Support and Flap Handle .................................................................................64
Not Tightening the Bolts and cables! ................................................................................66
4Undercarriage.................................................................................................. 67
4.1 Wheels.............................................................................................................................67
4.2 Main Undercarriage..........................................................................................................69
4.3 Nose Gear .......................................................................................................................73
4.4 Brakes .............................................................................................................................77
5. Tail Surfaces....................................................................................................... 80
5.1 Tensioning the Rear Fuselage..........................................................................................80
5.2 Elevator Trim Tab.............................................................................................................81
5.3 Tailplane..........................................................................................................................83
5.4 Rudder.............................................................................................................................87
5.5 Control Cables.................................................................................................................90
6Fitting the Rear Fuselage Fairings................................................................100
6.1 Preparing the rear fuselage fairings................................................................................100
6.2 Fitting the rear fuselage fairings......................................................................................101
7. Engine Installation..........................................................................................105
Rotax 912/912S .............................................................................................................105
8. Wings...............................................................................................................110
8.1 Wing Frame ...................................................................................................................110
8.2 Aileron Horn Assembly...................................................................................................119
8.3 Attaching the Wings to the Fuselage...............................................................................121
8.4 Aileron Control Cables....................................................................................................122
8.5 Flaps..............................................................................................................................127
8.6 Covering the Wings........................................................................................................129
8.7 Inserting the Battens ......................................................................................................136
9. Windscreen Frame and Throttles..................................................................138
9.1 Windscreen Frame.........................................................................................................138
