Fw 190A
Screw two 3⁄32-inch spacers to the spinner (above left). Press the cowl firmly against the spacers, center the spinner and mark the mounting holes in the fuselage sides. The mounting holes are pre-drilled into the cowl easing this task. If for some reason, you do not use the clear cowl, mount the cowl then remove it. Attach a card (above right) to the fuselage side extending over the area where you need an access hole. Make the hole and then transfer it to the remounted cowl. Using AirBorne’s clear cowl is much easier. If flying from grass
runways, trim the wheel doors (below left) about ½ inch to above the axle attachment point. Gear door on the right has been trimmed vs. stock size on the left. Don’t forget the 1⁄16-inch spacer mentioned in the text. Attach two, straight hardwood sticks (below right) to the same points on each elevator half. Adjust the independent elevator control rods so that both halves meet in the middle of the rudder plane and are exactly even and centered. This is vital to prevent inducing a rolling moment during elevator application.
preventing this “filleting”, the fit here is so tight that the joint is well sealed. The engine mount is the standard “slip fit” that will accommodate most 40-sized en- gines. The Evolution 46 was an easy fit and proved more than powerful enough for this light fighter. The firewall mounting holes are pre-drilled and were perfectly centered. The instructions show an inverted mounted engine but that only works for a 4-stroke. The 2-cycle engine was mounted sideways so that a Pitts-style muffler, exiting the bot- tom, could be used. Using this muffler (no. 5646) from Bisson
www.bissonmufflers.com preserved the Fw’s clean fuselage lines and kept the upper fuselage sides nearly grease free. The muffler fit the Evolution engine perfectly as designed by Bisson. Repositioning the engine was easy since the mounting holes were square, allowing 90-degree rotation without having to relo- cate the holes and blind nuts. Use the in- struction book’s illustration to properly align the fuel tank so that the stopper cor- rectly exits the firewall. The separate tank illustration is inverted for this airplane. When mounting the sturdy fiberglass cowl, it might be easier to position it using two flat, 3⁄32-inch sticks screwed to the spin- ner backplate as shown. Center the back- plate in the cowl opening, push the cowl
46
firmly against the sticks and mark the drilling holes on the fuselage. Then drill and mount the screws. Be sure to use the sup- plied grommets to prevent vibration cracks over time.
AirBorne includes a clear cowl that can be
used to position muffler, needle valve and idle mixture adjustment holes in the fin- ished cowling. Simply mount the cowl and you can see exactly where all the holes need to be made. Then slide the clear cowl over the painted one and make the necessary cutouts. If you do not choose to use this con- venient feature, use the old hole in the card location method as shown in the photo. Another nice AirBorne feature is that the
canopy mounts with screws, not glue. This allows either later cockpit upgrades or repo- sitioning the pilot should he start wander- ing around in there over time. Again, be sure to use the supplied silicone grommets to pre- vent any vibration damage.
The two elevator pushrods join to a single, bolt together, nylon block. A short, single rod connects the block to the servo. This makes the elevators rock solid.
Be sure to exactly align the elevator halves so that they are perfectly even. Un- even elevator halves will induce a rolling motion during elevator input making good loops and landings difficult to fly. The small
rudder is surprisingly effective so there is no need to exceed recommended rudder throws. Under no circumstances exceed the book’s elevator movement (more later). A fixed drop tank is included that is an ex- act color match to the wing’s bottom. All the mounts and hardware are included to bolt this attractive addition to the wing bottom. However, I chose to omit the tank for the first 20 flights just in case any problems with the retractable landing gear might sur- face (none did). My future plan is to make this droppable fuel tank actually droppable. Retract installation is simple because the manufacturer has already mounted both the gear and the linkages. Once the low profile retract servo is installed (here a Futaba FP- S136G), mount the adjustable connectors to the servo arm being sure to use removable locking compound on the threaded section. Then just slip the linkages through the ad- justable connectors and tighten. It’s almost too easy. Both flaps are connected to a single servo using torque rods. There may be a slight dif- ferential movement if one torque rod is bent differently than the other. Position the flaps firmly in the retracted position. Then apply full flap and measure the total movement of each flap. If there is a difference, adjust one control horn up or down on its torque rod un-
DECEMBER 2012
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