3
A few tips to ensure 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. 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 deflect
well over 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 for the ailerons and elevator and at least 450 oz. inches of torque
for the rudder.
5. Use a high quality epoxy for installing the composite control horns and hinges. We highly recommend
the use of Pacer Z-Poxy 30 minute formula. We have used this glue for many years with zero failures.
6. You may want to add a bead of silicone glue (Pacer Zap-A-DAP-A-GOO, etc.) or RC-56 Canopy glue
to the intersection of the canopy/hatch and its wood frame for additional strength and resistance to
vibration. DO NOT USE CA here as it will fog the canopy.
7. Your aircraft is built using very 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 maintain
airframe longevity.
8. Be sure to put a drop of blue Loctite thread locker on every bolt on this aircraft! Failure to do so may
cost you your aircraft! This includes servo screws!
9. The basic assembly process of the Extra is very similar to that of our previously released 50cc and
100cc aircraft. Some of the photos in this manual may be taken from a previous aircraft release if we
determined that the assembly step was illustrated more clearly in these photos.
If repairs become necessary the Ultracote colors used are as follows:
Red/White/Black color scheme: True Red- # HANU866, White- # HANU870, Black- # HANU874
Blue/White/Red color scheme: Midnight Blue- # HANU885, White- # HANU870, True Red- #HANU866
