With the wings covered and engine in place, it was time to fit the fairings and engine cowlings. While the Nynja looks very similar to the SkyRanger Classic and Swift II, it comes with lots of extra aerodynamic refinements which increased the cruise speed by about 20 mph over the Classic!

In preparation for adding the windscreen, the support frame was added just inboard of the wing roots. These are fitted after the wings to ensure that the windscreen is flush with the wings surface. With the firewall in place, we were ready to attached the floor plan. Initially it is clamped in place to check alignment with the cabin uprights and the underside rear edge. When we were happy, we drilled the holes and clecoe’d the pan into position. There is a bit of overlap along the rear of the floor plan which is cut to align with the rear fuselage shells. Once cut it was tidied up and riveted into position. A small hole was cut in the centre rear section of the floor plan to allow the flap detent lever to pass through.

The next step was to fit the scuttle moulding to the firewall and floor pan. Once that was in place the engine cowling could be fitted. First the upper and lower cowling were placed together to ensure the fitted snugly. Next we carefully drilled the fixing holes along the alignment marks. Again, cleco’s were used to hold the two parts together. With all holes drilled it was time to fit the cowling to the airframe and they fitted perfect! The cowling needs to be aligned with the spinner. We’re using a standard Kiev propeller with a 23cm spinner which aligned perfectly. A cowling support is fitted just behind the engine drive flange, this can be adjusted to align with the spinner if it is of different dimensions. With all cowlings in final position, they were bolted into position and the cowling fasteners installed. The scuttle was also bolted to the door frame and the rear edge cut to fit with the floor pan.

The clean lines of this Nynja are starting to show, join us next time when we fit the engine accessories, fuel system and start looking at the avionics.

Our starting point for the next stage, the firewall is in place ready for fitting the cowlings.

The dual throttles will be connected by a torque tube, throttle friction is provided by clamping two nylon washers against either side of the plates on the port side lever.

The support frame is a simple tube added inboard of the wing root that will support the windscreen and ensure its flush with the wing upper surface.

The floor plan is clamped into position initially to check alignment. The rear edge is then cut to align perfectly with the rear fuselage shell. Once cut, holes can be drilled in the fuselage upright and cleco’d into position before final riveting.

The scuttle moulding is clamped into position, it remains clamped until all of the cowlings have been fitted and verified as aligned then it is also drilled/riveted to the fuselage upright.

The forward face of the firewall with the scuttle moulding fitted. In the centre of the firewall you can see the hole for the cabin heat pipe, very important in Ireland!

First the cowling halfs are fitted together to ensure they are flush. Holes are then drilled along the alignment marks and cleco’s are used to hold them in position.

The test fitting went well so we could proceed with the final fitting.

There are various fairings throughout the airframe that are fitted to reduce drag and increase performance. Here we fit the fairings for the elevator and rudder control cables.

The cowlings need to be aligned with the spinner. In our case, we’re using a 23cm Kiev prop spinner. A cowling support is installed just behind the engine drive flange and this is adjusted to match the spinner.

With the fasteners in place, the clean lines of this SkyRanger Nynja are beginning to appear!