HobbyZone Super Cub LP Upgrade Instructions

HobbyZone Super Cub LP Upgrade Instructions

HobbyZone Super Cub LP Upgrade Instructions

Instructions Prepared by Bob Ringle

Adding Ailerons OR Adding Clipped Wing and Ailerons

Power and Landing System Options Included

The following build log and instructions uses a HobbyZone Super Cub LP BNF as a base aircraft to mod into a plane with ailerons and/or a high performance sport plane. Other versions of the HobbyZone

Super Cub, such as the RTF, require a DSM2 Receiver such as the AR6110.

Listed below are the recommended components to add ailerons:

1ea. HBZ7120 Super Cub wing

1ea. HBZ7122 Wing Struts

1ea. PKZ1822 Control rod set

2ea. PKZ4921 Aileron control rod and control horn set

1ea. SOT128 Hinge set

2ea. PKZ1081 Long wire servos

2ea. PKZ1060 Elevator and Rudder servos

1ea. EFLRYH3 Aileron Y-harness

For the full clipped wing/aileron upgrade, we recommend these components:

1ea. HBZ7120 Super Cub wing

1ea. HBZ7122 Wing Struts

2ea. Small electrical connectors for wing strut modification

1ea. PKZ1822 Control rod set

2ea. PKZ4921 Aileron control rod and control horn set

1ea. SOT128 Hinge set

2ea. PKZ1081 Long wire servos

2ea. PKZ1060 Elevator and Rudder servos

1ea. EFLRYH3 Aileron Y-harness

Power system and additional upgrades (Recommended for power needed for aerobatic moves available with clipped wing/aileron plane)

1ea. CRCA1021 CustomRC Motor Mount

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

1ea. EFLM4010A E-flite Power 10 Motor

1ea. EFLA1040 E-flite 40A ESC

1ea. TNG25C22003SE Tenergy 2200 25C LIPO

1ea. EFLM1925 E-flite 5mm Prop Adapter

1ea. EFLP1080E E-flite 10X8 Prop

1ea. HBZ7125 Tail set

1ea. HBZ7385 Fuselage (some modifications are needed to the fuselage)

1ea. 5mm CF Tubing Wing Spar

1ea. 3mm CF Tubing Horizontal and Vertical Stabilizer Spars

Landing systems

1ea. HBZ7106 Landing Gear Set

1ea. DUB100MW Minilite Tail wheel

1ea. DUB250SL Super Lite wheels

1ea. HBZ7390 Float set

1ea. DUB830 Skis

Adhesives

Gorilla Glue

Mercury M3300M Medium CA

MEUMH16 Mercury Accelerator MH16

Assembly

The instructions below are for the complete upgrade to a clipped wing Super Cub with ailerons and enhanced electronics. If your intent is only to add ailerons, then delete the foam removal

steps from the procedure below, and in addition the electronics enhancements are not

required.

Adding Ailerons

Here are a few pics of the clipped wing part of the mod. The first step is to remove a 7” section of foam from the middle of the wing. When cut; the wing will be flat where the two sections meet.

A 7" cut out of the center of the wing goes nicely with a fine toothed hobby saw.

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

The modified 41" wing was Gorilla Glued in flat with zero dihedral. Lay out the CF spar location, servo pockets and wire lead cut outs and ailerons. The ailerons are about 2" by 14". The servo pocket locations are mid aileron with the location along the wing chord determined by the length of the control rod and placement of the control horn. Using the suggested servos and control hardware the location of the servo is approximately 2 ½” from the leading edge.

I used a steel rule to keep the cuts straight and a very sharp hobby knife to make the cuts.

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

The aileron is flipped over in this photo showing the 30 degree bevel cut.

Mark off a line on each side of the foam to be beveled that approximates the 30 degree angle and keep the blade in line on each side as it is cut. With care, I end up with a fairly straight cut.

Cut the bevels with a fresh, single edge, razor since a dull blade will rip the foam cells.

Leave about a 3/16" deep foam shoulder on the wing side of the aileron so a variety of hinge methods can be used including; CA hinges, tape or nylon hinges.

Servo pockets: Cut the basic rectangular shape with a hobby knife to give a smooth edge and then use a Dremel cutting tool to remove the foam to the proper depth to make the servo flush with the wing's surface.

Grooves: I used a cheap soldering Iron to melt the grooves for the CF wing spar and the servo wires using the metal rule to control the melt.

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

Next, dry fit all the components.

Then, wash all the foam with soapy water and scrubby sponge and rinse it to remove the mold release on the foam's surface. This ensures that the paint will adhere to the foam.

In the past, I’ve used tape hinges for the SC. This one, being a more aggressive design, I decided on using some nylon hinges from Sonic-Tronics. They measure 1/2" deep by 7/16'' wide, per side, of the hinge. I CA'd 5 of them in place, per aileron.

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

Cover the aileron wire and spar grooves with clear or white tape.

Connect the Y harness to the aileron wires. It will plug into the aileron channel of the Rx.

The hardware from the PKZ P-51 complete control rod pkg. or PKZ4921 (BF109 flaps)

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

Due to the short length of the screws used with the control horn backing plate, I did a little counter sinking of the plate.

Add struts by using stock hardware and trimming the length of the strut to fit. CA a small electrical connector to the fuselage side of the strut and install at the stock location on the battery box.

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

Motor and Motor Mount

I fit the CustomRC motor mount to the Power 10 motor. I say fit, because I needed to remove a bit of material from the shaft hole in the mount to accommodate the power 10's shaft retainer collar. I used the dremel drum grinder to remove enough material for clearance.

The motor mount's mounting holes are correctly spaced to match the pre-drilled holes in the firewall.

The holes and slots in the motor mount work with a variety of motors including the Power 10.

The overall length of the motor and mount is about 1/4" longer than stock placing the front of the motor touching the cowling. No problemo. Simply add new holes to the cowling.

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

Tail Reinforcements and Additions

Due to the higher loads on the tail section CF is added as is a larger tail wheel.

Cut grooves in the horizontal and vertical stabs for 3mm CF tube reinforcements. I CA'd these in. I also added a strip of CF to the elevator.

I notched out the plastic tail holding assembly and ran the CF to through that and CA'd it. I added a

Dubro Parkflyer size control horns that are both screwed and CA'd in place.

I moved the control horn assembly from the stock location to a meatier part of the rudder and partially overlapped the steerable tail wheel assembly.

I replaced the stock tail wheel with a 1" diameter Dubro wheel.

A pic of the horizontal stab and elevator with CA'd CF in place and control horn attached.

NOTE: You may want to use heavier duty, than stock, control rods for the tail surfaces. The

control rods used in the PKZ Gunfighter, PKZ1822, will work with minor alterations.

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

The 2 1/2" Super Light Weight Dubro "Tundra" style wheel hub hole is a little large for the landing gear shaft so I added a 2" X 1/2" strip of adhesive aluminum tape to the axle for a better fit.

The ”Tundra” wheel compared to the stock wheel. The stock wheel is OK for smooth surfaces; the

Tundra wheel for grass strips...Uh, I meant Tundra strips. Actually, up to a 3" wheel could be used and still look relatively scale.

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

A test fit of the foam components, motor, prop, cowling and landing gear.

Electronics and Equipment Area and Battery Tray Mods

The Electronics: PKZ Bind & Fly Rx from a Bind & Fly Super Cub, Eflite 40A ESC and Tenergy

2200mAh 25C 3S.

I chose the Bind & Fly Rx since the B&F SC is a logical place to start with performance mods.

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

The ESC is located where the RX used to be. I clipped the power leads from the Rx, since they are no longer needed and velcroed the Rx to the side of the fuse.

In order to accommodate the 2200 pack, cut the back out of the battery box out and remove a little foam.

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

It's a very snug fit. But, that's good.

A Few Finishing Tips

Prior to painting, the entire plane should be washed with soapy water, rinsed and lightly sanded with

220 grit or steel wool. Be careful not to break the surface of the foam cells. This process will greatly assist the paint to adhere to the foam. Add a very light coat of primer prior to painting.

Masking: Use narrow strips of masking tape that have been applied to another clean surface reducing the tack. Occasionally, even with the utmost of care, a painted surface will pick up when the tape is removed. Areas where paint has been picked up can be painted over with a brush. Brush strokes will not be evident on the foam surfaces.

The finished plane can be decorated to the pilot’s preferences. The model can be painted with a variety of paints including water based Acrylics and Enamel. Care should be taken in applying enamel paints as the accelerants used in the spray can cause the foam cells to bubble up. Use light coats and avoid soaking the surfaces. The model pictured features “off the shelf” hardware store enamel paint and vinyl graphics.

Getting Ready to Fly

With the suggested components the plane’s CG is perfect. The CG is located roughly 2-1/2 to 3 inches measured from the leading edge.

Be sure to range test the radio before each flying session.

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

Taking to the Air

Because of the stock thrust angle, down and to the right, and the motor and prop combo, a slight amount of left rudder should be applied at takeoff.

WOT takeoffs should be avoided until the pilot becomes familiar with the extraordinary power available. 50% to 60% power will provide lift off, with slight “up” elevator, within a few feet.

All standard aerobatics are available. Fast rolls, inverted flight and inside and outside loops can all be done at 2 3rds throttle. Vertical climb at WOT is near unlimited. I addition to those tricks; harriers, high alpha and knife edge are also within the flight envelope when by an intermediate pilot.

For Four Season Flying fun, add these to your Ultra Cub.

Dubro skis

HobbyZone Skis

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

The skis work great on snow too.

…Just right for a day of flying off of the local lake or pond.

This kit is a product of HobbyZone.com. Product replacement warranty is limited to the components in the kit that are defective or damaged upon the customer’s receipt of the kit. Hobbyzone.com does not guarantee or warranty the kit components, once installed, or the assembled kit aircraft. Contact HobbyZone.com

Questions? Call 888-953-9663

Upgrade Instructions Courtesy of HOBBY ZONE – www.hobbyzone.com

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