Gaui 500x Foldable Quad Flyer

I searched around the internet forums, shops and thought about building one out of wood/glass fibre like the Tricopters but after a month of searching I set my heart on the Gaui 500X Quad flyer for various reasons - It had good reviews, was foldable, looked the part and christmas way looming.

Inside the box you find :-

• Doom Cover
• 2 x Base Plates
• 4 x Motor Mounts
• 4 x Booms
• 8 x Boom Holders
• Electrics Tray
• 4 Bags of Screws
• 4 x Metal Landing Legs
• 1 x Manual

Take the bottom main frame (The one with five large round holes) and insert the boom holder into the pivot hole using self tap fixing screws M3 x 8mm making sure you have the position indicator for booms on the bottom.

Align the top main frame on top of the four pivot points of the inside boom holders using self tap screws M3 x 8mm. Make sure these are tight but still able to move so the arms can still fold easily.



Insert the six main frame aluminum posts (PM2x3.5x22) between the top and bottom frame sections and fix in place using M2 x 5mm with a bit of lock tight blue to save these coming loose due to vibrations.

Slide the four outer arm holders between the frame base plates while making sure the recessed hole for the boom crip is pointing upwards. Fix these in place using four M3 x 8mm self tap screws on the top making sure again these are tight but will still allow a sliding movement.



Fix the otherside of the outer arm holders with four M3 x 8mm screws complete with one M3 gold Washer. Again make sure this is tight enough to still hold but again allow a sliding movement. The Washer is there to act as a locking mechanism to lock either the arms folded or open.



Next its time to add the Anti-Vibration dampers which is used for the Gyro Controller of your choice which is normally the GU-344 but in this case its the OpenPilot CopterControl. Push one end of the Damper through the pre-drilled holes.



Take both sides of the motor mount & insert the spring type landing gear in the recessed slot. Using the M2 x 5mm screw & nut tighten the two halfs to hold the landing gear in place, next take the three M3 x 12mm self tap screws & insert these into the remaining holes, tighten to hold together remembering these will have to be loosened again to fit the arms.



Slide the motors in through the top and line up the four holes with the base plate, tighten using four M3 x 5mm screws while remembering to add thread lock blue. If you don't have screws available there is a "Motor Screw" Kit which fit perfectly. Do the above for the other three motors.



The motors I decided to use were a perfect fit, lined up perfectly but do remember not to over tighten the screws as I managed to crack one of the base plates by using a little to much force. Totally my own fault and not due to quality of parts.

Next up its time to modify the ESC as the original cables are a little short so the picture to the right shows the process. First cut open the heat shrink and desolder the three motor end cables so longer ones can be soldered on. Now reheat shrink to make sure nothing shorts out with any moisture in the air.



The Plush 18amp speed controllers are a little big to fit inside the arms so I needed to drill two 8mm holes on the side of the arms to allow both sets of wires to be fed through. Once these were drilled I tidied up the holes with a file to save any damage happening from sharp edges & also used "hot Clue" to hold the cables in place.

One thing I thought was a fantastic idea and one I hadn't seen before until I build this bird was a 4 in 1 connector so you can connect all the positives together and all the negitives to the battery using 3.5mm bullit connecters with no hassle. Highly recommended - Part Number 222175 but can also be found at HobbyKing.