kiwi_craig's blog View Details
Archive for April, 2014
Posted by kiwi_craig | Apr 29, 2014 @ 08:27 PM | 4,444 Views
Syma S032 / S022 motors vs V262, you need to change the pinion gear.

xheli has the Syma motors on sale for $1.93 for a pair (CW & CCW)

BTW xtreme make a very nice pinion gear puller for micro motors
Posted by kiwi_craig | Apr 28, 2014 @ 05:49 AM | 4,355 Views
Ball bearing fitted both mjx 47 and v911 main shaft bearings fit

10 x 10 x 5 heat sinks fitted takes 15 degree C plus out the engine temps now in the mid to high 30s vs 48 to 52 previously observed

Alien canopy is a tight fit but sure looks "right". V959 / 222 main landing gear works nicely.

Fitted plastic shims to space down the battery holder for the v912 850 / 1000 batteries. 1000 mah batteries are a better fit, fractionally thinner than the v912's 850's mah unit.

Just waiting for the mobius and its all go for aerial video

Blades benefitted from balancing , well off as delivered.....
Posted by kiwi_craig | Apr 28, 2014 @ 05:36 AM | 4,223 Views
New paddle flybar, sure interested to see if this improves the outdoor flying capabilites

New hughes 300 esky canopy, gonna be a bit tricky to fit the v2 chassis......
Posted by kiwi_craig | Apr 28, 2014 @ 05:29 AM | 3,556 Views
Both failed within two flights pf each other........

Flies like a drunken runaway truck with only one flybar linkage working......

Sure wish xtreme gets a giggle on with the billet rotor assembly
Posted by kiwi_craig | Apr 10, 2014 @ 05:27 AM | 3,781 Views
Xtreme products ball bearing motor with replaceable brushes.... Nice.

Xtreme make superbly engineered products

Trying to find out from xtreme if this is compatible with the 2c battery, it might need a 3c .......

Nicely setup v912 with xtreme products

V912 XTREME! (8 min 10 sec)

Posted by kiwi_craig | Apr 05, 2014 @ 08:07 PM | 4,644 Views
The review threads suggest the tail gear is a tad prone to stripping under tail
Strike. And the motors can get pretty hot.

Changed out the stock tail skid for the mjx 45 unit, allot longer, fixing mount spacing is a fraction different so careful elongation of the holes was needed. Also had to route out some clearance at the rear of the fin to clear the motor wiring, 1 minute job with a sand paper wheel

Skid is allot longer, i a actually trimmed 5 -6 mm of the bottom so the machine sits flat on hard surfaces. The longer fin keeps the tail rotor out of the grass etc. the red colour grows on ya....

Heat sink, the mjx unit fits nice enough and is pretty beefy, more fin area the better in my assessment. Carefully trimmed the plastic protection cover keeping the longer legs on each side and tucked under the recess in the hot sink and hot glued in place to protect the wiring.

Final upgrade was a couple of red leds so you can tell which way things are heading at a distance in low light, plugged into the aux light plug on the board, no other resistors etc needed.

Main rotor strike on the rear tube ! More protective rubber needed here as well as the flybar zone further forward.

Love flying this beast it hauls arse.....
Posted by kiwi_craig | Apr 05, 2014 @ 03:56 PM | 4,532 Views
Went with the v913 battery, its a tight fit so moved the canopy forward, moved top mounts forward by one screw hole, drilled and self threaded the new forward hole, velcro to attach bottom of canopy.

Used velcro to secure battery. Battery changes are now quick and easy, canopy nicer to get on off. Extended the front lighting line as well

Had to retrim servo links for static hover. Machine flies great with the extra nose weight, personally i think the forward canopy adds a more aggressive stance as well

Ditched the battery strap and went with velcro on underside of battery. Better quicker and more secure
Posted by kiwi_craig | Apr 05, 2014 @ 03:29 AM | 4,396 Views
Totally enjoying the v912 as a step up to outdoor flying from the v911

Lots of reading and sifting the good advice from the bs and poor advice.....

Eng temps. Looked at and bought a number of heat sinks as per the "advice"...... None fitted worth a damn...... Anyways looking at the problem its simply a lack of cooling airflow over the motor, any large industrial electric motor has an integral cooling fan for exactly this purpose, elected to fit a cooling fan on the bottom of the drive shaft. Pretty simple......

Couple of iterations later and have a v911 tail rotor trimmed to 30mm diamater and carefully hand drilled the centre mount to 2 mm

Works perfectly. Blows air up through the ports in the base of the motor case and decent airflow out the top ports cooling the brushes and armature

Bench tests showed the motors to stay stone cold. Under flight loads they get warm vs hot enough to damn near burn you in stock form.

Heat sinks have there place but ducted cooling air is the best first choice. I have a third heat sink coming that will hopefully fit with out cutting the chassis plates....... Cooling fan plus heat sink = as bullet proof as it can get.