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-   -   HobbyKing L-39 Glass 70mm (http://www.rcuniverse.com/forum/electric-rc-jets-198/11262742-hobbyking-l-39-glass-70mm.html)

ACES&8s 10-14-2012 06:46 PM

HobbyKing L-39 Glass 70mm
 
1 Attachment(s)
See the product here: http://www.hobbyking.com/hobbyking/s..._EDF_Kit_.html

The Power system is:

Changesun 70mm 10 blade fan; http://www.hobbyking.com/hobbyking/s..._Fan_Unit.html

Velocity Cool42 Inrunner; http://www.velocity-rc.com/cgi-bin/v...62&cid=7&idx=1

Turnigy SuperBrain ESC; http://www.hobbyking.com/hobbyking/s...hless_ESC.html

Turnigy Nano-Tech Lithium-Polymer Battery; http://www.hobbyking.com/hobbyking/s...Lipo_Pack.html

Essentially a 70mm with 1800 watts. The cool inrunner is 4200kv, with a 16.8 volt Lipo (4 cell). Holding Voltage under load for the pack I have is 15.1 according to the datalogger on the ESC.
At 74% throttle current is 86 amps and watts are 1200. I've not run it up to WOT yet.

I had to forego any landing gear, and put fairings over the aileron linkages.
The planes all up weight is 3.8 pounds....rather heavy...in faCT really heavy. I have no thrust measure yet...I've one last task on it...flux tube. The tailtube is important, and with the install here on trhe L-39...its rather short. The stab cuts off the top too, because proper clearance is not available, I'll have to flatten the tube where its run under the stabilizer. I hooked up a long wire pushrod from the servo up front for elevator, and joine the elevators with 5mm cf tube.

SuchIsLife 12-09-2012 01:39 AM

RE: HobbyKing L-39 Glass 70mm
 
My friend just bought one of these. I'll mention this thread to him.<div>No maiden yet, it's still in the post but he's quite experienced in edf and says it looks promising from what he's read.</div><div>
</div><div>How is yours going, Aces?</div>

ACES&8s 01-20-2013 01:31 PM

RE: HobbyKing L-39 Glass 70mm
 
No room inside for retracts...with the high power system...big battery. Flew really fast...

Extreme_RC 01-21-2013 04:27 PM

RE: HobbyKing L-39 Glass 70mm
 
There is a lot of info for this model on rcgroups, best outcomes have been building it light with around 800-1200 watts, I have seen 2 fly, one with a wemo and 2W18 on 4s, it bungee launched and flew quite nicely, landed soft too. Other one I dont know what was in it but it was a bit heavier and faster, reminded me of the Sapac viper, more of a handful when heavy too.


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