Thursday, December 11, 2008
Trex 500 NSP
Finally wait until the TT full metal version is out. Bought at $3380 and the kit takes 5 hours to assemble. 1 hour to "tune".
Some tricky part on assembly"
1) Tail pitch slider will hit the lever if travel set too much
2) Hex nut strip easy with standard driver, will change all Align screw to better one.
3) Tail heavy with 2x3s 2200mAh. 7sA123 can have best CG, but too large for stock canopy.
4) Headspeed is amazing iwth 13T. 3D right ot of box!
5) Must set the BEC to 6V to avoid low voltage BEC kicking off my Spectrum receiver. Some expert tested the Align built in BEC will drop to trough of 3.5V, which is so close to the shut down voltage of 3.3V.
6) Align DS510 digital servos get a lot of appraise and said to be better than Futaba 9650. My impression is "NO". Its slop (>10 degrees) is far more than a 9650 which hold solid. I am quite disappointed.
Maiden successful for 5 flights today. 3 packs 7s A123 hovering.
check some loosen parts, even red loctite before:
1) Seesaw center screw (well known) and the clearance form the mixing arm is <1mm.
2) Tail hub slider lever , desing with one screw only. Slight loosening results in huge slop!
3) Mixing arm screw