anyway u can using trex parts on walkera 36, but the walkera still a walkera unless you spend thousand dollars upgrade from toe to teeth... and it still not a trex. so the best of all is going to get a real trex.. 600 dollar is over-paid . helihobby.com sell the newest kit with motor and esc for $249, or a RTF for under $ 600, beside helihobby.com is the most truth in rc heli. rc-experts.com said they are expert???? but they are not...to be honest

Will the Trex main blade assembly or blade grips (whatever you call it) fit on the walkera dragonfly #36?

Hey credence,

Ok, RC-Expert sent me the Align 420LF and an alu-cased version of their own 3200KV-motor to test with and they arrived in the mail 2 days ago. I can keep the one I like best as free replacement and send the rest back. The alu-cased RC-Expert didn't run much cooler than the CF-cased version, but the Align 420LF didn't heat up significantly during my initial tests, even without heat-sink (which I have now put on; The more cooling, the better).

I took it for some hovering today and kept it in the air for 8 minutes, after which the motor and ESC were just moderately hot, while the RC-Expert motor would probably have melted itself out of the chassis by then. ;-) The cooling-fan in this Align outrunner-motor works so well, that the casing actually increases in temperature a bit after landing, when the fan has stopped and the remaining heat from the windings seeps out. It's a bit lighter than the RC-Expert motor, but I just needed minimal trim-adjustments. I could increase the gyro-sensitivity a bit with this motor, to where it would have wagged it's tail with the old motor. Any idea what this would mean?

All in all, I'm very happy with the Align 420LF in my T-Rex 450X.


Grtz,

Traveller

so how much do you suggest the motor, where did you get it, and how much is it?

Hey thecheatscalc,

I got it as a free replacement from RC-Expert, as the motor they shipped with my T-Rex RTF-set (an "RC-Expert" CF-cased 3200KV) seemed to have a heat-problem. The 420LF currently costs US$50,- there. I'm just into basic hovering and a bit of FF at the moment, so I can't tell yet how well it'll hold up under 3D, but it seems to provide plenty of power, lifts the T-Rex 450X off the ground easily and seems to handle the rapid altitude-changes I tried to stress-test it very well. It doesn't run very hot, but I would still recommend heatsinking it, especially for more demanding flights in higher ambient temperatures. I get around 12 minutes of hovering out of one of those red RC-Expert 1800mAh 3S 10C LiPo's with it, which seems very reasonable.


Grtz,

Traveller

how hot DID it get, hot to the touch still able to burn, pretty warm but holdable, warm, cold, frozen

I'm thinking of getting one of these as mine will break eventually.

PS: I'm guessing the TRex is heaver than the 36 so if it did well on yours it should do great on mine, what do you think?

Hey thecheatscalc,

After about 3 minutes of hovering, the old motor got so hot that I couldn't hold my fingers on it for more than a second or so and probably still wasn't at it's max. temperature at that point. It also started smelling of burning plastic. I just never tried longer flights with it, as I didn't want to risk blowing it up. Even a heat-sink didn't make much of a difference. It took at least 5 minutes to cool down to reasonable temperatures again.

The Align 420LF seems to max out at a temperature where I can still hold my fingers on the heat-sink without burning myself, even after beeing in the air for 8 minutes or so. I would call it pretty warm but holdable. After a few minutes on the ground, most of that heat is already dissipated again. Sorry, but I don't have exact temperatures for you. Ambient temp during my test-flights was around 25 degrees C, I think.


Grtz,

Traveller

*whisles* that's pretty nice I'm definatly getting one of those (once I get my heli off the ground) when I burn mine up. thanks for the info!

PS: if the heat sink is pretty hot (130-150) then the motor must be even cooler, heh mine gets too hot to hold after 30 seconds (this not because of pitch) but for some reason it seems to stablize in temp and hold it at that going up 10 degrees every minute or so, though I can't say that of my battery which just melted out of the sticky on the velcro [:'(] (I know that not a good thing)