Stevens Aero Model Fly Baby Bipe Manuel

Fly Baby Bipe..

Bower’s timeless homebuilt.

Wing Span: 14.5 inches | Wing Area: 62 inches2| Average Flying Weight: 1.5 ounces

Version 1.0 (revised 03.14.2014)

Build Instructions

WARRANTY

Stevens AeroModel guarantees this kit to be free from defects in both material and workmanship at the

date of purchase. This warranty does not cover any component parts damaged by use or modification.

In no case shall Stevens AeroModel’s liability exceed the original cost of the purchased kit. Further,

Stevens AeroModel reserves the right to change or modify this warranty without notice.

LIABILITY RELEASE

In that Stevens AeroModel has no control over the final assembly or material used for final assembly,

no liability shall be assumed nor accepted for any damage resulting from use by the user. By the act of

using the user-assembled product, the user accepts all resulting liability.

If the buyer is not prepared to accept the liability associated with the use of this product, the buyer is

advised to return this kit immediately in new and unused condition to the place of purchase.

THIS PRODUCT IS NOT INTENDED FOR CHILDREN 12 YEARS OF AGE OR YOUNGER.

WARNING: This product may contain chemicals known to the state of California to cause cancer

and/or birth defects or other reproductive harm.

PRODUCT SUPPORT

This product has been engineered to function properly and perform as advertised, with the suggested

power system and supporting electronics as outlined within this product manual. Product support

cannot be provided, nor can Stevens AeroModel assist in determining the suitability or use of

electronics, hardware, or power systems not explicitly recommended by Stevens AeroModel.

For product assembly support, replacement parts, hardware, and electronics to complete this model,

please contact Stevens AeroModel at www.stevensaero.com.

Stevens AeroModel

26405 Judge Orr Rd., Colorado Springs, CO 80808 USA

719-387-4187 www.stevensaero.com

Build Instructions

Project Checklist

Kit Contents

☐Laser Cut Wood (7 Sheets)

☐Build Instructions

☐Computer Drawn Detail Pages (2 Pages)

☐Pre-Cut Acetate Windscreen

Taped to back of wood brick:

☐1 - 0.032 in. x 12 in. wire (Landing Gear)

☐2 - 0.015 in. x 12 in. wire (Pushrods)

☐Hardware Bag

1 - 1-1/2 in. length of Heat Shrink Tube

1 - Nylon Receiver Clip

1 - Pair Wheels (SIGSH540)

Build Instructions

Suggested Items To Complete This Model

Many of the following items will be available at your local hobby shop. For your convenience Stevens

AeroModel stocks all of the power system components and most of the required and optional building

supplies. If you have difficulties sourcing any of the requisite items locally, please visit our web site to

purchase those items necessary to complete your model.

Required Electronics (Available at StevensAero.com)

☐Transmitter with at least 3 channels

☐Receiver/ESC/Servo Brick [PKZ3351 or PKZUA1151]*

☐Motor/Gearbox [PKZ3624]

☐130mm x 70mm Propellor [EFL9051]

☐130-160 mAh 3.7V LiPo battery.

*SPMAR6400 may be used with computer radio and mix.

Covering Film Requirements

While any high quality model film may be used to finish this model. Superior results will be achieved

using genuine AeroLITE brand model airplane covering film. The lower working temperature and superior

light weight of AeroLITE are especially desirable for this style of model airplane. AeroLITE is 1/3 the

weight of the typical model airplane covering film and will represent a weight savings over competing films

when applied to this model.

☐2 - Patch Packs or 1 Roll (2M) AeroLITE or AeroFILM

☐1 - Patch Pack in Trim Color of AeroLite or 1 Roll (1M) AeroTRIM (self adhesive trim)

Wood Sealant Suggestions

While not required, it is suggested that a high quality lacquer based clear sealant be applied SPARINGLY

to seal and protect the wood grain in humid environments. One single light misting of this sealant will be

sufficient to repel water without adding significantly to the models final flying weight. Likewise, much of

this model can be colored using a compatible lacquer based spray paint. Below are our suggestions, feel

free to use your preferred product.

☐DEFT clear lacquer based sealant (available at most hardware stores).

☐Design Master Color Tool lacquer based spray paint (available at most art supply stores).

Required Building Supplies and Tools

☐1/4 oz. Medium CA Glue (PAAPT04)

☐1/4 oz. Thin CA Glue (PAAPT10)

☐CA glue applicator tips (PAAPT21)

☐CA glue accelerator (PAAPT15)

☐Hobby Knife with ample supply of #11 blades

☐Sanding block with 400 and 600 grit paper

☐Heat Gun and Covering Iron

☐Small Needle Nose Pliers

☐1/2 in. wide clear tape (DUB916)

☐Velcro for Battery Mounting (PKZ1039)

☐Masking Tape (Low tack blue painters tape)

☐AeroLite Covering Film (1-2 Patch Packs)

Optional Building Supplies and Tools

☐Balsa Filler (HCAR3401)

☐Thick CA Glue (PAAPT20)

☐Modeling Clay for Ballast

☐CA glue de-bonder (PAAPT16)

☐Masking Tape (Low tack blue painters tape)

☐Clear Lacquer based sealant (DEFT)

☐Lacquer based spray paint (Design Master)

☐Glass Cleaner

Build Instructions

Sheet Wood Inventory (1 of 1)

Build Instructions

Builders Notes

Build Instructions

General Assembly Instructions

Thank you, for purchasing this Stevens Fly Baby Bipe (UM).This product has been developed and

manufactured using state of the art CAD/CAM systems and features a unique interlocking construction

process that, when compared to traditional methods found in other model aircraft kits, save countless

hours of measuring, cutting, sanding, and fitting. We are certain that you’ll find our kit to offer a truly

exceptional build experience. As this kit is recommended for the novice model builder and pilot; we invite

beginners who have purchased this kit to seek the help of a seasoned builder and pilot. At any time

should one run across a term or technique that is foreign please don’t hesitate to contact our staff with

your questions.

READ THIS!

Please READ and RE-READ these instructions along with any other included documentation prior to

starting your build and/or contacting our staff for builder support.

Pre-sanding

Do not skip this step. Prior to removing any parts from the laser cut sheet wood use a sanding block

loaded with 250-400 grit paper and lightly sand the back side of each sheet of wood. This step removes

any residue produced as a result of the laser cutting process and, as we have found that most stock wood

sizes run several thousandths of an inch over sized, slightly reduces the thickness of each sheet.

Leave your pre-sanded parts in the sheet until required in the assembly process.

Protecting your worktable

Use the poly tube that this kit was shipped in as a non-stick barrier between your worktable and the

product assembly. Promptly clean up any epoxy spills with rubbing alcohol and a disposable towel.

Bonding the assembly

As this product tabs, notches, and otherwise interlocks like a 3D puzzle we suggest that when fitting parts

you dry fit (use no glue) the parts together first. It’s advised to work 1-2 steps ahead in the instructions

using this dry-fit technique which allows ample opportunity to inspect the fit and location of assembled

components and realizes a benefit as each successive part contributes to pulling the entire assembly

square. Once you arrive at the end of a major assembly sequence square your work on top of a flat

building table and revisit the dry fit joints with glue. Using the dry-fit process you’ll be able to recover from

a minor build mistake and will ultimately end up with a more square and true assembly.

Unless otherwise noted in the instructions we find it easier to tack glue part (temporarily bonding parts in

assembly using a small dot of glue) using medium CA glue applied with a fine-tip CA glue applicator tip.

Tight fitting joints should be bonded using thin CA glue applied, sparingly, with a CA glue applicator tip.

Never force the ﬁt!

Remember this is a precision cut kit our machines cut to within 5 thousandth of an inch in accuracy. Yet

the wood stock supplied by the mill may vary in thickness by up to 20 thousandths. This variance in the

wood stock can cause some tabs/notches to fit very tight. With this in mind, consider lightly sanding, or

lightly pinching, a tight fitting tab rather than crushing and forcing your parts together. You’ll break fewer

parts in assembly and will end up with a more square and true airframe.

Manual Updates

Please check our web-site for updates to these instructions prior to commencing the build.

To obtain downloads and updates relative to this model aircraft kit, please visit the corresponding product

page at StevensAero.com

Build Instructions

Fuselage

Fuselage parts are designated with a “F” followed by a numeric. Parts have been numbered so that the

fuselage assembly and required parts follows in numeric order from F0 to F27 along with Turtle Deck

stringers A, B, and C.

The fuselage is of traditional sheet side with central crutch assembly. Many of the formers will need to be

installed in a forward and top/bottom orientation. Unless otherwise specified, formers should be installed

with the etched part number facing the front of the assembly and any top or bottom designations followed.

You will dry fit the majority of this fuselage assembly together only gluing at the final instructional steps.

When parts cannot easily be retained with friction, use a single tiny drop of medium CA glue applied

sparingly through a CA glue applicator tip to “tack glue” the part in place. Should you commit an error in

assembly it will be easier to recover from the mistake and remove or correct the part fit in error if you do

not slather the assembly in glue after each step! Further, this method of assembly will allow our

interlocking design to do it’s job as each successive part installed within the fuselage will help pull the

entire structure square and true.

Build the Central Crutch

1. Fit two 1/32 in. ply parts F0 to the nylon Receiver Clip to form the Receiver Tray.

2. Fit receiver tray assembly to the bottom of F1, orienting it so that the long arm of the nylon

clip is toward the rear of F1 - refer to plans for proper orientation. Bond with medium CA.

3. Fit former F2 to the front of F1, orienting it so that the bottom of F2 corresponds to the

bottom of F1.

4. Fit former F3 to the rear of F1, orienting it so that the bottom of F3 corresponds to the

bottom of F1.

5. Fit the assembly to the fuselage side F4. If necessary, lightly tack glue the assembly to the

fuselage side with medium CA.

Landing Gear Block

6. Fit 1/32 in. ply landing gear brace F5 to the forward most edge of the slots immediately

behind former F2 in the fuselage side - reference plan for part location. Do not bond.

7. Now fit 1/32 in. ply landing gear brace F6 to the slots in the fuselage side immediately

behind F5. Do not bond.

8. Fit the final 1/32 in. ply landing gear brace F7 immediately behind F6. Do not bond.

Build Instructions

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Build Instructions

Step 1

Step 2

Step 3

Step 4

Step 5

Step 6

Step 7

Step 8

F5 F6

Nylon

Clip

Front

Bottom

Bottom View

Bottom

Front

Rear

Bottom

Fuselage Continued

Remaining Side and Top Formers

9. Fit fuselage side F8 to the fuselage assembly. Carefully fit the tabs on F1, formers F2 and

F3, and the landing gear parts F5, F6, and F7 to their corresponding slots in the fuselage

side. Square assembly on a flat surface and bond all mating surfaces with thin CA.

10. Fit F9 along tab and notch locations at fuselage bottom forward of former F3 and tabs at

former F3. Bond F9 to the assembly in the area where it makes contact with these parts as

illustrated.

11. Pull fuselage sides together, fitting the tabs of the fuselage bottom F9 to the slots in the

fuselage sides. Align and square fuselage sides where they taper together at aft most end

of fuselage. Use a low tack painters masking tape to retain the fuselage sides at the tail of

the aircraft, then bond F9 to the fuselage sides.

12. Fit the stabilizer mount F10 to the top, rear of the fuselage sides as illustrated. Ensure F10

is properly seated within the fuselage sides and bond to retain.

13. Fit and bond former F11 to the notches in the fuselage sides immediately ahead of part F10.

14. Fit, square, and bond former F12 to the notches in F1 immediately ahead of former F3.

15. Fit, square, and bond former F13 to the slots in F1 immediately behind former F2.

Motor Mount

16. Fit the ply motor mount supports F14 and F15 to the front of former F2, note that the edge

of these parts marked “bottom” will align flush with the bottom of former F2.

Build Instructions

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