Mountain Models Flashback Manuel utilisateur

Flashback Specifications

Wingspan: 36in. (91cm.)

Length: 36 in. (91cm.)

Wing Area: 265in2(1710cm2)

Weight (without battery): 12oz. (340g.)

Wing Loading (depending on battery): 8.5 – 10.0oz/ft2

Mountain Models Flashback

Revision History

Date Revision Notes/Comments

10/04/03 Document initial creation.

Thank you for purchasing the Flashback. This plane is an aileron/elevator/rudder (full

house) setup, designed for the intermediate to advanced pilot who wants a plane with

outstanding performance that will fly in a limited space.

Sincerely,

Doug Binder

[email protected]

Mountain Models

6975 Blackhawk Place

Colorado Springs, CO 80919

www.mountainmodels.com

Phone: 719.592.1387

Fax: 719.528.6125

Created by Ross Design Group for exclusive use by Mountain Models.

Mountain Models Flashback 3

Before You Begin

Before you begin building your Flashback make sure you read and understand all of the

instructions thoroughly.

Additionally, you will need to have the following items. Check to make sure that all of

your parts are there and in good shape, and review a couple quick building tips to make

this whole process go quicker and easier.

What You Will Need

• Smooth and flat work surface

• Wax paper to protect the plans

• Thin and thick Cyanoacrylate (CA) glue

• Hobby knife with #11 blades

• Needle nose pliers

• Wire cutters

• Sanding block with 200 grit sandpaper

• 90°triangle or small square to true the bulkheads and fuselage

• Covering material (if not using the supplied Doculam)

• Sealing iron for applying the covering

• Clear tape for aileron hinges

• 4 channel radio

• 4 channel receiver

• GWS EPS400-C motor with a GWS HD 10x7 propeller

• 3 micro servos (we recommend either the Hitec HS55s or the GWS Picos)

• Electronic Speed Control (ESC) capable of handling at least 15 amps

• 8 cell 950 mAH KAN NiMH battery pack (minimum)

Parts List

The following tables list all of the pieces that are in your Flashback kit.

Description of Parts

Wood

Figure A: 1/16” laser cut balsa sheet

Figure B: 1/16” laser cut balsa sheet

Mountain Models Flashback

Description of Parts

Wood

Figure C: 1/16” laser cut balsa sheet

Figure D: 1/16” laser cut balsa sheet

Figure E: 3/32” laser cut balsa sheet

Figure F: 1/16” laser cut balsa sheet

Figure G: 1/16” laser cut balsa sheet

Figure H: 1/16” laser cut balsa sheet

Figure I: 1/8” laser cut balsa sheet

Mountain Models Flashback 5

Description of Parts

Wood

Figure J: 1/32” laser cut balsa sheet

Figure K: 3/32” laser cut balsa

Figure L: 1/8” laser cut balsa sheet

Figure M: 1/64” plywood sheet

Figure N: 1/4” laser cut balsa for cowl

Figure O: 1/16” plywood sheet

Mountain Models Flashback

Number

in Kit Description of Part

Loose Wood

2 1/8” x 18” hardwood dowels for leading edge

Wire

1 3/32” x 14” landing gear wire

1 1/32” x 18” thin music wire for the tail wheel and aileron pushrods

Plastic

1 Plastic canopy

1 Doculam clear covering material

Bagged Parts

1 1/8” round x 2.75” hardwood dowel

1 1/4" x 1/4" x 3/4" balsa stick with metal tack

4 Motor mount plywood pieces

2 1 3/4” wheels

2 Internal star wheel retainers

1 1/2” tail wheel

1 6” Velcro strip for mounting the battery and receiver

1 6” double-sided Velcro strip for battery strap

1 Neodymium canopy hold down magnet

1 Tyvek strip for the rudder and elevator hinges and tail wheel

reinforcement (also referred to as CA hinge material)

1 Spectra thread for pull-pull system

6 Micro pushrod connectors

4 Cotter pins for the pull-pull cables

2 #2 x 3/8” motor and battery mount retaining screw

General Building Tips

• Tape your plans to the work table, and then cover them with wax paper to

protect them.

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

however, you will 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.

• 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.

• After you remove pieces from the balsa sheets, carefully remove any of the extra

material from where the piece was attached.

• 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.

Mountain Models Flashback 7

Assembly Instructions

Okay, so now you are ready to actually build the Flashback. If you follow these simple

instructions, we can have you flying in no time!

The Entire Process Demystified

Step 1: Prepare your workspace for assembly.

Step 2: Assemble the fuselage.

Step 3: Assemble the wings.

Step 4: Assemble the stabilizers, rudder, and elevator.

Step 5: Assemble the ailerons.

Step 6: Assemble the landing gear.

Step 7: Assemble the canopy.

Step 8: Sand, cover all your pieces, and remove the covering where described.

Step 9: Install the tail feathers.

Step 10: Position the wing and ailerons.

Step 11: Install the elevator and rudder servos.

Step 12: Attach the control horns.

Step 13: Install the aileron servo.

Step 14: Install the motor.

Step 15: Attach the electronics.

Step 16: Finish the kit up with the tail wheel, batteries, landing gear, canopy, throws,

and center of gravity.

Final Step: On a calm day, find a field without too many trees or light poles and go fly.

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 or under cat (which seems to be a recurring problem) and

are being built right before they are attached to the fuselage and each other.

Step 1: Preparing Your Workspace for Assembly

Before you begin assembling the Flashback, you must prepare your workspace.

! Making space in what is probably the most crowded place in your home

1. Lay out the plans on a flat worktable, and then tape them down.

2. Cover the plans with a sheet of wax paper. This will protect the plans from glue.

Mountain Models Flashback

Step 2: Assembling the Fuselage

The first thing you are going to assemble is the fuselage of your airplane. This involves

assembling the fuselage sides and bottom, attaching the bulkheads, assembling and

attaching the motor mount, and finally, attaching the sheeting.

It is REALLY important that the fuselage sides are mirror images of each other;

otherwise you will have two left or two right sides, which may work for a profile

plane…

Assembling the Fuselage Sides

For the fuselage sides, you will need:

• 2 Fuselage Pieces (Figure A)

• 1 Fuselage Piece (Figure B)

• 1 Fuselage Piece (Figure C)

! Assembling the sides

1. Remove the fuselage pieces, shown in black, from the balsa sheets.

To remove the pieces, gently flex the balsa sheets until the pieces fall out.

You may find that you need to carefully trim the extra pieces of wood that

originally held the piece to the sheet.

2. Using the notches and grooves on each fuselage side, position them as shown in the

following picture.

Mountain Models Flashback 9

3. Making sure the joints are snug and flush, apply thin CA to each of the joints. The glue

will be wicked into the balsa to form a secure bond, so it won’t take much glue to do

this. Make sure that you are only working on one joint at a time, and that the pieces

are firmly connected before moving to the next joint.

Be careful to keep your fingers as far away from the glue as possible; otherwise,

you might become a part of the model permanently. If you do get stuck, remove

yourself as carefully as possible, trying to avoid taking any of the wood with you.

Once separated, remove the CA glue from your fingers using nail polish remover, or

acetone, making sure you wash your hands thoroughly when done.

4. Once the glue is dry, carefully remove them from the wax paper.

Attaching the Fuselage Reinforcement Pieces

The fuselage reinforcement pieces, or fuselage doublers, are used to reinforce the

fuselage and are placed on the interior walls of each fuselage side.

Yet again, I am just going to quickly mention that the fuselage sides must be mirror

images of each other. This includes making sure that the doublers are mirror images.

But don’t worry, we’re coming to the rescue, the pictures below show both sides just

so there’s no confusion…

For each fuselage side, you will need:

• Fuselage Doubler (Figure B)

Notches and

grooves you use to

create the fuselage

sides

Mountain Models Flashback

• Fuselage Doubler (Figure C)

• Fuselage Doublers (Figure D)

• Fuselage Doublers (Figure E)

! Attaching the first set of fuselage doublers

1. Line up the first fuselage doubler (Figure B) with the larger oval slot and the wing

opening, located on the fuselage side.

You will find that if the doubler is in the wrong spot, the larger oval slot in both the

doubler and the fuselage side will not line up.

2. Make sure everything is lined up, including the wing opening, the larger oval slot, and

the outside edge, and then glue the fuselage doubler into place.

Fuselage doublers

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