- Assemble the noseblock from all the parts R27 (8.0 mm balsa) before gluing
the block to the fuselage, correctly centred.
! Note the shape of the nose as shown in the side elevation.
- Assemble the tail block from all the parts R29a + b (12.0 mm balsa) before
gluing the block to the tail end of the fuselage, correctly centred.
- The concave radius of the tail block should now be sanded to follow the
radius of the former R11.
! Use abrasive paper wrapped round a bottle or can for this.
! Take care not to sand or modify the support surface for the fan unit.
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- Temporarily attach the two fuselage hatches with two very small drops of cyano
(unless they stay in place by themselves) before sanding the whole fuselage smooth.
- The whole of the outside of the fuselage and tail block should be sanded to the
profiles shown in the cross-sections on the plan.
! In the area between cross-sections E and F the concave radius in the fuselage top
deck must match the inlet lip of the fan unit, to produce a smooth transition to the
fan unit at section F.
- Sand the fan shroud assembly to final shape before gluing it to the fuselage, taking
care to keep it central and straight.
! The fan unit must be aligned at 90° to the wing section (airfoil).
! It is essential to avoid a negative angle (thrustline) at this point. It is better if the
front part of the fan shroud dips slightly into the fuselage (positive thrustline,
max. 1.5°).
- Use abrasive paper wrapped round a bottle to sand back the air intake area of part
R12 (sections E - F) to produce a completely smooth transition.
! The diameter of the bottle must be the same as the inside diameter of the fan unit
(see Fig. 10 and sections A - ).
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- lue together parts R29a + b, R30 a + b and R31 a + b (1.5 mm balsa) to
produce the three shroud panels as shown, and sand the joint surfaces
carefully on both sides.
- Carefully wrap the shroud panels R29 and R30 round the fan unit “dry” (no glue),
and tape them in place.
! It is a good idea to moisten the wood to ensure that it will bend without breaking.
- Start this procedure with the bottom of R29, curving it upwards until the two ends
touch. You may need to trim the ends according to the thickness of the wood.
- Fit R31 on the inside to produce a smooth transition.
! It is important that all the curved shroud panels align correctly at the bottom and
the front, and end flush with each other.
- When you are confident that all the parts fit correctly, repeat the procedure,
gluing the parts together with cyano adhesive.
- Sand the inlet lip and the rear part of the fan shroud to the profiles shown
on the plan.
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