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• The elevator push rod is made of 1.5mm carbon, the length is 400mm
• Connect the pushrod to a length of heat shrink tubing and then to the elevator horn -make sure 
the servo arm is at the correct angle !
• Glue the elevator control horn on the bottom of the elevator -leave the glue to dry completely.
• Make sure the servo arm is in the neutral position and assemble the prepared linkage - the servo 
arm must be perpendicular to the pushrod!
• First, adjust the neutral position of the elevator by slightly moving the servo, and then the servo 
can be glued in place.
• Check the direction and range of movement  -if necessary, the carbon pushrod can be supported 
along the fuselage by pieces of depron with a hole drilled in the centre, as shown in Figure!

14) Elevator linkage  -closed loop option

• If the builder prefers this kind of closed loop linkage for the elevator,  then they should look at the 
instructions already given for the rudder closed loop linkage, in Section 12 -see the rudder section 
for relevant illustrations.  They can use the identical  procedure!

Figure 22: elevator servo horn and linkage components
Figure 23: elevator servo horn linkage,  assembled
Figure 24: carbon pushrod support, using depron pieces

END  page 10 of 12

15)  Undercarriage

• From the supplied 2mm carbon rod, cut two 170mm lengths.
• Insert the landing gear legs through the prepared hole in the lower fuselage part (by about 40mm, 
see figure) and glue the ends of the rods in the prepared holes in the leading edge of the wing
• Adjust the landing gear and glue them carefully through the lower fuselage part,  at the crossing 
point of the landing gear carbon rods
• Then, the undercarriage fairings can be bevelled to match the fuselage side and the length of 
these fairings adjusted - the carbon rods should be 2-3mm longer than the  the fairings to allow the 
wheel spats to be attached !
• Glue the wheel fairings to the lower fuselage part
• Select the correct angle of the wheel spats and glue them to the wheel covers

Figure 25:  Undercarriage

16) Motor and electronics

• Check that the motor spins in the correct direction !
• Mount the motor using the supplied motor mount bolts, in the holes in the motor mount.  Centre 
and glue the motor mount to the nose of the plane.  

• Up / down-thrust and side-thrust is not necessary !

17)  Centre of Gravity (CofG)

The CofG can be altered by shifting the Li-Po battery forwards or backwards  -its mounting can be 
done with a Velcro strip or pad.
The CofG is dependent on the flying preferences of the individual  -we suggest starting with an 
initial value around 100-110mm behind the leading edge of the wing, measured at the wing root. 
In addition to forward and backward balance,  lateral balance is also important.  The cockpit / 
canopy area of the plane can be used to assess this.  When the model is placed upside down on 
the centre fuselage, balancing on the cockpit / canopy area of the top fuselage, there should be no 
tendency to tilt to one side or another.

Содержание GERNOT BRUCKMANN YAK55M

Страница 1: ... no weight increase in comparison to a white foam version has been achieved through the use of particularly light expanded foam and the elaborate colour design on top and on the underside of the model is applied without the modeller having to reach for the airbrush The model is intended for operation in confined spaces and can in appropriate conditions i e low wind also be used outdoors We request...

Страница 2: ...erience Using the described components and construction methods the plane will have a flying weight of about 130 grams Based on many test flights we have found that there appears to be little significant change in the flight and crash characteristics up to a flying weight of about 175 grams If the weight is more than 175 grams then regardless of engine power the properties such as typical Shock fl...

Страница 3: ...rol horns closed loop components and motor mount Figure 1 foam parts without accessories END Page 3 of 12 2 Leading edge of wing Sand slightly one side of the flat carbon strip or clean with alcohol degrease On one side of the carbon strip and on the leading edge of wing apply a thin coat of UHU Por and allow to dry completely Put some foil or greaseproof paper between the building board and the w...

Страница 4: ...he elevator The required width thickness of horn is identified on the printing The two elevator halves are joined with a short piece of flat carbon found in the accessories bag note the gap between the two halves must be correct the best elevators will come from making sure that you have the correct width for the elevator horn Bevel the front edge of the elevator and hinge to the tailplane using t...

Страница 5: ...ne struts are as for the wing struts aligned and then glued Then carbon rod bracing is placed over one side of the lower fuselage using a zig zag method make sure you check the angles The length of the struts are 5 x 110 mm and 1x 100 mm The front strut ends at the wing struts Procedure sharpen the ends of the carbon rods slightly using a mini drill grinding wheel so that a maximum of 2mm is inser...

Страница 6: ...s using 1 mm carbon rod the length of each strut is approximately 15cm Glue the rudder servo in the prepared hole in the middle position above the wings if necessary alter the size of the hole for the servo you will use Important Check the neutral position of the rudder servo and fit the servo arm or an extension servo arm if necessary the servo arm length should be equal on either side The rudder...

Страница 7: ...selage part by about 40mm see figure and glue the ends of the rods in the prepared holes in the leading edge of the wing Adjust the landing gear and glue them carefully through the lower fuselage part at the crossing point of the landing gear carbon rods Then the undercarriage fairings can be bevelled to match the fuselage side and the length of these fairings adjusted the carbon rods should be 2 ...

Страница 8: ...nt Make sure the direction of the surface travel is correct and that the servo movement is not restricted by mechanical binding or by a mechanical end stop can be recognised by a servo humming noise For this model the use of a modern programmable transmitter with switchable rates and exponential is highly recommended Enjoy your flying of this plane and we hope it is very successful When flying thi...

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