Having just finished test flying the Pilatus Porter that I built for Tony Roberts from the Airborne plansand co
After a bit of a fiddle getting the inverted motor to run I had a couple of successful flights with no dramas. The model only required 3 clicks of down trim and 3 clicks of right trim and it flew hands off. It is a delight to fly and far better than many trainers I have flown over the years. Applying flaps slows it right down with very little pitch change. Most of the club members present had a fly and even Tony who has virtually no model flying experience at all was doing right and left hand circles after about 1 minute of instruction. The 46 OS gave plenty of power and I can thoroughly recommend it to any one considering building their first scale model as it is a very docile aircraft. Thankyou Rick
The PC6 Scale Model was completed in 170 Hours by an experienced model builder (Rick Harris). The model includes engine and working navigation lights.
1. Wing Joiners:
Plug in wings using 1/4 inch (6.5mm) diameter bright steel rod. One located between the mainspars and one 3 1/2 inches in front of the trailing edge. Each rod passes through brass tubing in the fuselage and wings. Rod length is 18 inches.
2. Landing gear is functional:
Wire parts made from 1/8 inch diameter spring steel (piano wire) and the oleo made from 3/8 inch diameter brass bar stock. I used 2 springs about 1 1/2 inches long, one fitted inside the other for the suspension. the lower wire was soldered into the last 1 inch of the oleo. The rubber boot on the top was made from a light spring 1/4 inch diameter by 1 inch long and covered with heat shrink tubing. This allowed the long upper wire to move in the eloe without fear of it coming out.
3. The sprung (scale) tailwheel:
This assembly was made from 22g sheet brass and 1/8 inch diameter spring steel wire. The whole assembly pivoted as per full size and operated from the rubber servo by spring loaded cables (fishing wire trace).
4. Wings:
The wings were built-up from 2mm balsa, 4mm ply ribs and fully sheeted in 1.5mm balsa. Each control surface (ailerons and flaps) operated by a separate standard size servo.
5. Fuselage:
The fuselage was covered in 1.5mm ply from the front to the rear of the cabin section and the remainder in 1.5mm balsa. All the framework was sealed with dope and spray painted with a flat undercoat and finished in full gloss enamel paint.
6. Finished:
The finished weight without the radio equipment is 7 lb and it flies quite realistically with the .46 cubic inch 2 stroke engine. If you plan to use a .91 cubic inch 2 stroke engine I suggest you built it to about 100 inch wingspan.
An aeroplane wing (aerofoil) is shaped to allow airflow passing over it to increase speed and therefore lose pressure. Air passing over a curvature travels faster than over a flat surface. Pressure beneath the aerofoil remains unchanged, while that above and bearing down on it reduces giving the section lift.
Lift will be maintained so long as the air is fast enough to sustain the lower pressure on top of the wing. An aeroplane stalls when the airspeed is to low. An aeroplane stalling has nothing to do with the engine stopping. (gliders don't have an engine). An engine can be delivering full power and the aeroplane will still stall if not flown correctly.
The aerofoil on the boxkite is very basic and inefficient. One of the most efficient aerofoils to be seen is on a "Jumbo" jet. This principle applies to all aircraft wings, propellers, helicopter rotors and turbine blades in jet engines.
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