Extreme Flight Muscle Bipe ARF User manual

70cc Muscle Bipe ARF

Assembly Manual

Please read the following paragraph before beginning

assembly of your aircraft!

THIS IS NOT A TOY! Serious injury, destruction of property, or

even death may result from the misuse of this product. Extreme Flight

RC is providing you, the consumer, with a very high quality model

aircraft component kit, from which you, the consumer, will assemble

a flying model. However, it is beyond our control to monitor the

finished aircraft you produce. Extreme Flight RC will in no way

accept or assume responsibility or liability for damages resulting from

the use of this user assembled product. This aircraft should be flown

in accordance with the AMA safety code. It is highly recommended

that you join the Academy of Model Aeronautics in order to be

properly insured and operate your model at AMA sanctioned flying

fields only. If you are not willing to accept ALL liability for the use of

this product, please return it to the place of purchase immediately.

Extreme Flight RC, Ltd. guarantees this kit to be free of defects in

materials and workmanship for a period of 30 DAYS from the date of

purchase. All warranty claims must be accompanied by the original

dated receipt. This warranty is extended to the original purchaser of

the aircraft kit only. Extreme Flight RC in no way warranties its

aircraft against flutter. We have put these aircraft through the most

grueling flight tests imaginable and have not experienced any control

surface flutter. Proper servo selection and linkage set-up is absolutely

essential. Inadequate servos or improper linkage set up may result in

flutter and possibly the complete destruction of your aircraft. If you

are not experienced in this type of linkage set-up or have questions

regarding servo choices, please contact us at

[email protected] or 770-887-1794. It is your responsibility to

ensure the airworthiness of your model.

Congratulations on your purchase of the Legacy Aviation 70cc Muscle Bipe!

Inspired by the highly modified Waco known as the Mystery Ship, flown by

the late air show legend Jimmy Franklin, the Muscle Bipe delivers timeless and

classic looks coupled with modern features and performance. Equally at home

flying barnstormer airshow maneuvers as it is flying old school low and slow

3D, the Muscle Bipe's gentle manners inspire confidence for sport flyers and

3D enthusiasts alike.

The 70cc Muscle Bipe features quick connect mechanisms that allow it to be

assembled and disassembled in a couple minutes at the flying field-without any

tools! No more long and tedious assembly and tear down sessions that are

typically associated with biplanes!

The Muscle Bipe features our state-of-the-art construction materials and

methods, resulting in a lightweight, rigid and robust airframe. It features

carbon fiber wing and stab tubes, carbon fiber landing gear and tailwheel

assembly, carbon fiber main wing spars and fuselage longerons, g10/lite ply

composite laminated internals and 2 gorgeous genuine Ultracote (Oracover)

color schemes. Highly prefabricated, including pre-hinged and sealed control

surfaces, the Muscle Bipe can be assembled in a couple evenings.

Because of the work done for you by the skilled workers in our factory, there is

very little gluing required during assembly. Once you glue the G10 control

horns into the control surfaces, most of the rest of the assembly consists of

bolting components into the airframe. This makes for a very quick assembly

process, with most experienced modelers able to complete assembly in 2-3

evenings of relaxed and enjoyable work.

Tips for Success:

1. We are very pleased with the level of craftsmanship displayed by the

builders in our factory. Through hundreds of grueling test flights containing

maneuvers that no aircraft should be subjected to, our prototypes have

remained rigid and completely airworthy. Having said that, it is impossible

for us to inspect every glue joint in the aircraft. Take a few minutes and

apply some medium CA to high stress areas such as the aileron servo

mounting trays , landing gear mount, anti rotation pins, wing and stab root

ribs, etc.

2. Having survived the journey half way around the world while experiencing

several climate changes, it is not uncommon for a few wrinkles to develop in

the covering. Fear not! These are not manufacturing defects, and are easily

removed with a little bit of heat. Use a sealing iron to go over all seams,

stripes and sharp points in the covering scheme. You may want to apply a

drop of clear fingernail polish at the tip of all sharp points to prevent them

from lifting. To remove wrinkles use a 100% cotton tee-shirt or microfiber

cloth and your heat gun and heat the covering while gently rubbing the

covering onto the wood with the t-shirt or cloth. Be careful not to use too

much heat as the covering may shrink too much and begin to lift at the edges

or even worse, burn a hole in the covering! Take your time, and a beautiful,

paint like finish is attainable.

3. By the time your aircraft arrives at your door step it will have been handled

by a lot of people. Occasionally there are small dings or imperfections on

some of the surfaces. An effective method to restore these imperfections to

original condition is to use a very fine tipped hypodermic needle to inject a

drop of water under the covering material and into the ding in the wood.

Apply heat to the area with a sealing iron and the imperfection will

disappear. Deeper marks may require that this process be repeated a couple

of times to achieve the desired result, but you will be surprised at how well

this technique works.

4. DO NOT SKIMP ON SERVOS! Your aircraft is equipped with very large

control surfaces that may be required to deflect well more than 45 degrees. A

lot of servo power is required to prevent flutter and to maintain the required

deflection for maneuvers. We absolutely recommend the use of METAL

GEARED servos with a minimum of 350 oz. inches of torque.

5. Use a high quality epoxy for installing the composite control horns. We

highly recommend the use of Pacer Z-Poxy 30 minute formula. We have

used this glue for many years with zero failures. More recently we have

started using the Loctite brand of Hysol epoxies and have grown to prefer

them for their ease of application and clean up.

6. Your aircraft is built using modern construction techniques and is very light

weight for its size. As with any high performance machine, regular

inspection and maintenance is a must. While disassembling your aircraft

after a flying session, pay close attention and inspect glue joints, linkages and

loose covering to be sure the airframe is sound. A few minutes spent doing

this will help ensure airframe longevity.

7. Be sure to put a drop of blue Loctite thread lock on every bolt on this

aircraft! Failure to do so may cost you your aircraft! This includes servo

arm screws!

8. There are several excellent videos that further explain the assembly and

setup of giant scale aircraft on our YouTube channel, breaking down each step

with in-depth explanations and examples. We highly recommend taking the

time to view these videos, especially if you are new to giant scale aircraft

assembly and setup. Follow the link below to access our channel.

https://www.youtube.com/channel/UCC_LyauUOgcTE4oHow93CNA/videos

Let's get started!

1. When assembling one of our current aircraft, I like to go ahead and get all

of the control horns glued into the control surfaces. I start by lightly scuffing

both sides of the shanks of each control horn that will be glued into the surface.

A sanding block with medium grit sandpaper is ideal for this task.

2. Insert two control horns into a baseplate and temporarily insert them into

the slots in the control surface (each surface's horns are affixed using the same

method, so choose the surface you want to start with and continue this

procedure until all horns are glued in place). Use a fine tipped marker to trace

the control horn. Remove the horns and baseplate and use a sharp #11 hobby

blade to remove the covering 2mm inside the line you traced. Take great care

to only score the covering.

3. Test fit the control horns and baseplate into the surface and make sure

everything fits properly. Use a high quality epoxy to glue the horns into the

surfaces. I've started using the Loctite Hysol products and glue gun which

makes this process so much faster with less clean up required and less waste. I

like the slow set EA 9462 for this particular procedure. It allows plenty of time

for gluing all of the control horns into place in one sitting.

I first apply glue to both slots, then to both sides of each control horn below the

baseplate. Once the glue has been applied insert the horns into their slots and

press into place firmly against the control surface. Wipe away any excess glue

with a paper towel soaked with denatured alcohol. Set aside to dry. Repeat

this process for all control surfaces.

Please note: If using a twin 70-76cc gas engine or electric setup it is absolutely

essential to use a pull-pull rudder system to achieve proper CG. This will

require that you glue a set of control horns to each side of the rudder to

interface with the pull-pull system cables. There is a plywood jig included in

the hardware package that aids achieving proper alignment.

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