background image

 

X

4

MR

250 

 

MexAir RC 

 

 

from the outside with a thin/blunt pointed object.   Do not cut off any excess 
motor lead at this time. 
 

 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 
 

 

v.

 

Bolt your motors to the arms while carefully pulling from the body end any 
excess wire loop at the motor.   
 

e.

 

Surface Wire Option – easier to install , but less aerodynamic 

i.

 

Lay out your wires as described above to determine where you will fasten 
the wires to the arm.  Drill small holes all the way through the arm on 
opposite sides of the wires to securely mount them to the arm using small 
“tie-wraps”.   

ii.

 

If using this option, you may also consider surface mounting your motor ESCs 
directly on the arm surface.  Again, this will additionally increase drag and 
turbulence and expose the components to possible unprotected crash 
damage. 

iii.

 

Bolt your motors to the arms and fasten the wires as appropriate for your 
configuration. 
 

4.

 

ESC installation   

a.

 

Prior to permanent attachment, note the depth of the bottom plate below the main 
body frame.  The depth below the mounted motor arm and the bottom plate will be 
about 9.7mm.  The depth between the main frame and bottom plate is about 14 

Enough Wire 

Laid Out with 

Some Excess 

3 Motor Wires 

Through 

Motor Wires in 

Place 

Summary of Contents for X4MR 250

Page 1: ...Class Racing Quad airframe We specialize in the design and construction of the airframe Since the various electronic components and peripherals are widely available through many sources our focus is...

Page 2: ...me comes configured to mount the supplied Power Distribution Board with the included PDB standoffs and predrilled main frame mounting holes This PDB mount allows for piggy back mounting of a 30 5mm co...

Page 3: ...o metal screw contact surfaces especially motor mounting screws 4 Dry fit and test all electronics and FPV gear to the extent possible during the build so disassembly will not be required after you ha...

Page 4: ...ary to start tightening it back it out slightly repeating this process until the fastener is threaded to the proper depth This creates a threaded hole that should hold firmly without any other aid For...

Page 5: ...both the positive and negative wire ends at the main body hole the large elongated hole You can always trace the polarity later during the build if you forget to do it now If supplied with colored wir...

Page 6: ...ile holding the standoff in place Take care not to over tighten the standoff and shear off the screw For added assurance to prevent the screw from ever backing off a small dab of RTV Silicone Seal can...

Page 7: ...s Verify that there will be sufficient wire to reach your intended ESC solder pad locations or connector A minimum wire length of about 4 inches is necessary If not use the Surface Wire Option describ...

Page 8: ...o the arm using small tie wraps ii If using this option you may also consider surface mounting your motor ESCs directly on the arm surface Again this will additionally increase drag and turbulence and...

Page 9: ...r This will allow for soldering the motor wires later and THEN moving the heat shrink over the ESCs prior to final shrinking d TEMPORARILY place the ESCs onto the bottom plate so that the motor pads f...

Page 10: ...ole is clear of any obstruction When finally tightened this creates a very rigid frame Temporary and partial frame assembly may be desired as you progress through assembly CF Tube Standoff Configurati...

Page 11: ...piece If there is any noted slipping or twist verify that all standoff fasteners are properly tensioned f Landing Gear Installation Note Nylon landing gear can be cut to desired length i Embedded Mot...

Page 12: ...pivot with moderate force Tighten loosen the arms as necessary so that they are firmly seated but can pivot with moderate force Do not over tighten to cause excessive dimpling of the laminate or poss...

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