Mountain Models EZ CUB Bedienungsanleitung

EZ CUB

EZ Cub Specifications

Wingspan: 36 in.

Length: 22.6 in

Wing Area: 232 sq. in.

Weight (Ready to Fly): 12 oz

Wing Loading: 7.4 oz/sq ft

Controls: 3 or 4

Version 1.05, February 5, 2008

Thank you for purchasing the EZ Cub™. The Mountain Models EZ Series™ planes are meant to

be the easiest kit build possible, while still having great flying characteristics and high

durability.

The EZ Series™ can be flown as 4-channel versions (rudder, elevator, throttle, and aileron) or

with the higher dihedral wings as 3 channel (rudder, elevator, and throttle).

The EZ Series™ was designed for the complete beginner builder and low experience pilots. For

those who are more experienced, the EZ Series™ still offers fun flying and some great

performance with the CG moved back a bit.

For those of us on a time budget, this kit will build up in as little as 3-4 hours, which is even

faster than a lot of ARF’s that are available.

We know you’ll enjoy the EZ Series™ planes and look forward to any feedback or questions you

might have.

Sincerely,

Brian Eberwein

[email protected]

WARRANTY

Mountain Models guarantees this kit to be from defects in material and workmanship for the

original purchaser. Since we have no control over the assembly of the final model, we accept NO

liability for any damage or harm caused by the final product resulting from the user. By building

this kit, you accept sole responsibility and liability from its use.

If you, the original buyer are not prepared to accept the liability associated with the use of this

product, return the kit immediately in new and unused condition to us for a refund.

Mountain Models reserves the right to change or modify this warranty without notice.

Mountain Models

PO Box 9557

Colorado Springs, CO 80932

www.mountainmodels.com

Phone: 719.630.3186

Before You Begin

Before you begin building your EZ Cub™, make sure that all the wood sheets and parts, and

hardware are present in your kit. In the unlikely event that something is missing, please contact

us immediately and we will send it to you right away.

Make sure you read and understand all of the instructions thoroughly before beginning

assembly of this kit.

Recommended Electronics:

•2 ea. Micro servos for 3 channel version (GWS Pico, Naro, HS-55, or similar)

•OR 3 ea. Micro servos for 4 channel version

•1 ea. Mini Receiver (Berg 4L is highly recommended)

•1 ea. Scorpion 2205 Brushless Outrunner (or 80 to 100 watt equivalent)

•1 ea. 3S-800 to 3S-1200 LiPo Battery

•1 ea. 15A to 18A Electronic Speed Control (depending on motor choice)

Tools You Will Need:

•Smooth and FLAT work surface

•Plastic wrap or Wax paper to protect the work surface

•Thin and Thick Cyanoacrylate (CA) glue

•5 to 10 Minute Epoxy

•Hobby knife with #11 blades

•Wire cutters

•Soldering iron for ESC and battery connectors

•Small screwdrivers and needle nose pliers

•OPTIONAL: Sealing iron if using iron-on covering

Items for Finishing:

•Sanding block with 220 to 400 grit sandpaper

•2 Rolls Wing tape of different colors

•3M-77 spray adhesive.

•Water-based polyurethane spray, fast drying

•Clear Tape for hinging control surfaces

•OPTIONAL: Balsa wood filler, lightweight

•OPTIONAL: Iron-on covering and trim

Fuselage Parts List:

•This Manual … If you do not have the manual you are holding, please call us. ☺

•Laser Cut Wood Bundle

o3 ea. 1/16” x 4” x 24” Balsa

o1 ea. 1/16” x 3” x 24” Balsa

o1 ea. 3/32” x 4” x 24” Balsa

o1 ea. 1/8” x 3” x 11.5” Lt. Plywood

o1 ea. 1/16” x 3” x 7.75” Plywood

•2 ea. Yellow Pushrod Tubes x 12”

•2 ea. 0.032” x 18” Wire

•1 ea. 1/16” Pre-bent landing gear wire

•Parts Bag

o2 ea. DuBro 1-1/2” Wheels

o1 ea. DuBro Tail Skid

o2 ea. DuBro Wheel Collars & Set Screw

o4 ea. 4-40 x 3/8” Screws

o4 ea. 4-40 T-Nuts

o4 ea. #4 Washers

o1 ea. 1/2” x 6” Double sided Velcro

o1 ea. 3/4” x 3” Sticky backed Velcro (loop & pile)

o2 ea. Micro EZ Servo Connectors

o2 ea. DuBro Micro EZ Links

o2 ea. 1/32” Plywood landing gear squares

o2 ea. 1/64” Plywood elevator reinforcement rectangles

Wing Parts List:

•Foam Wing Core

•Laser Cut Wood Bundle

o1 ea. 1/16” x 3” x 24” Balsa

o1 ea. 3/32” x 3” x 24” Balsa (Aileron version only)

o1 ea. 1/8” Plywood wing “rib”

o2 ea. 1/64” Plywood spar braces

o2 ea. 1/16” Plywood Aileron horns (Aileron version only)

•1 ea. 0.032” x 9” Wire (Aileron version only)

•Parts Bag (Aileron Version Only)

o2 ea. Micro EZ Servo Connectors

o2 ea. DuBro Micro EZ Links

General Building Tips

•Balsa is a lightweight and fragile wood, so you do need to be somewhat careful with it;

however, you might also need to use a little bit of force to make everything fit properly,

so don’t be too timid.

•Join all of your pieces using thin CA (Cyanoacrylate) glue, unless we tell you otherwise.

In general, only a small amount of CA is necessary to glue parts together. Do NOT glue

anything until the instructions tell you to.

•Don’t remove any pieces from the balsa sheets until they’re ready to be used. That way,

parts won’t get mixed up or disappear.

•Don’t over force your pieces together. If they aren’t going together properly, make sure

you have the right pieces and that they are oriented correctly.

•If you want to remove the charred edges caused by the laser cutting process, dampen a

cloth with bleach and gently rub the affected areas. Removing the char will not increase

the strength but will make it look better.

Assembly Instructions

Experienced builders may notice that this building order goes

against the “normal” building conventions. We have found that fewer pieces get mangled this

way, since you are building the stronger pieces first. For example, the tail feathers are at the

end of the build process instead of the beginning, so that they are less likely to get underfoot

(which seems to be a recurring problem) and are being built right before they are attached to

the fuselage and each other.

Section 1: Assembling the Fuselage and Tails

1. Press the 4-40 T-nuts into the front former as shown below. Make sure to install the

blind nuts on the “dirty side” of the parts, NOT the side that is engraved. Secure the T-

nuts with thin CA around the outside of the T-nuts AFTER you are sure they are fully

seated and flat against the wood.

2. Glue the 1/16” plywood rectangle brace to the FRONT of the front 1/16” plywood

former, using thick CA. Use the engraved line for placement.

3. Insert the 1/16” plywood front former through the 1/8” Lt Plywood crutch as shown in

the image above. MAKE SURE that the engraved “TOP” on the crutch is facing UP and

that the engraved “FRONT” on the former is facing forward. Slide the former into place

as shown in the image on the next page. Do NOT glue it yet.

4. Press the 1/16” plywood rear former into place on the back of the crutch, with the

engraved “FRONT” facing forward as shown in the image below. If it seems tight, place

the former flat on the table and press the crutch into it. Do not glue it yet.

5. Press the front 1/8” Lt. Plywood firewall onto the crutch. Ensure that the T-Nuts are on

the “inside of the fuselage, as shown in the image below. Once again, if it seems tight,

place the firewall flat on the table and press the crutch into it. Do not glue anything yet.

6. Press the 1/16” balsa former into the crutch as shown above. No, you still don’t get to

touch the glue bottle.

7. Press the 3/32” balsa lading gear top support into the front 1/16” plywood former as

shown below. It gets placed on the “back” of the former.

8. Press the 3/32” balsa landing gear rear support into place as shown below. If it is a bit

loose, you can use a SMALL drop of thin CA to keep it in place.

9. Slide the 1/16” balsa interior doublers into place over the crutch and formers, as shown

in the image below. If it looks like the tabs don’t line up, try putting it on the other side.

The parts are made to only fit on the correct side. Be careful when pressing the parts

on, and don’t get heavy handed. Slide them a bit at a time, until they are fully pressed

on. Making sure everything is pressed fully into place; secure all joints on the inside with

thin CA. Be careful where your fingers are when gluing the parts together. You don’t

want your fingers to get glued at the same time, now do you? I hate to think of how

much skin I’ve left behind on models I’ve built over the years from careless use of CA…

10. Press the 1/16” balsa fuselage sides into place as shown below. Press them flush onto

the doublers between the 1/16” plywood formers, but do not bend them to the nose yet.

Secure the sides to the doublers using thin CA applied from the inside of the fuselage,

through the holes in the doublers. On the nose, you can use thick CA applied to the

doublers, BEFORE you pull the sides fully onto the doublers. This makes for a very well

glued nose section with a good bond between doubler and side.

11. Glue the 3/32” balsa bottom cross brace into place using thin or thick CA, as shown

below.

12. Test fit the 1/16” balsa front bottom sheet, as shown below. If it doesn’t seem like it

fits, flip it over and try again. The slot is angles to match the front former. After it’s in

place, secure it around the joints with thin CA.

13. Test fit the 1/16” balsa front top sheet. Like above, after it’s in place, secure the joints

with thin CA.

14. Put the 1/16” balsa canopy front in place and secure with thin CA, as shown below.

15. Pull the rear of the fuselage sides together and use a piece of tape to hold them in

place, making SURE they are lined up at the back. Install the 1/16” balsa rear bottom

part. Secure it with thin CA, making sure it is fully pressed into place.

16. Install the remaining 1/16” balsa bottom part and secure with thin CA.

17. Slide the pushrod tubing in place, as shown below. Leave them about 1/8” in front of the

former, with the remainder going out the fuselage sides at the rear. Please note that

they cross each other near the back of the fuselage. Use some thin CA to tack them in

place. Then use some thick CA to form a small “fillet” between the tubes and the former

on the front and back of the former. Trim the rear of the pushrod housing about 3/4” in

front of the rear of the fuselage.

18. Install the top rear 1/16” balsa sheet. Secure with thin CA, and MAKE SURE that the

fuselage is not twisted while you are gluing it in place. (See image below)

19. Press the 3/32” balsa rear top stab support in place, and glue with thin CA. (shown in

above image)

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