J-power F5E Tiger

The horizontal fin needs reinforcement with epoxy as the factory does not secure enough for that small contact area.

I need to put in a refueling tube next to the cockpit as well.

The elevator control horn is realign to reduce binding of the servo rod.

The factory installation cause much binding and the servo will buzz even in neutral position.

Wonderful! That is my favorite tiger painting

Not much needed to be assembled. 10 mins job. Perfect for busy man like me.

Mr. pilot is waiting to take off.

I love this J-power's design. All compartment can be taken apart.

Air retract landing gear

Took me some time to figure out how to fit an air pump. The intake valve has a one-way valve that open up at 40-60 psi. My foot press air pump cannot tolerate the pressure and broke the piston. Need some "steel" epoxy pudding to reinforce the piston and reseal the crack with silicone glue.

Now can easily pressurize it with 7 stroke.

Weight : pending

x-flight Rafale

Lots of space for pressurized bottle. She now weights 960g (ready to fy)

Front steerable landing gear

Strong metal 3mm landing gears.

Which painting scheme should she be?

Servo horn stripped

Must check item after crash. Not easy to detect.

Trex 500 NSP with 7s A123

6 packs enough for continuous 15mins charging and for whole day flying.

All packs are over 100 flights cycle!

Trex500 NSP

Very solid and accurate control.

Size much smaller than 600N, but power to weight ratio is better.

Align Trex 500 M2.5 1.5mm hex screw

Align made non-standard M2.5 1.5mm hex screw that stripped easily with standard tools. Even with Align driver, the hex bolt will stripped as well after several attempts.

It is strongly recommended to replace all M2.5 1.5mm hex to 2mm hex screw. 2mm hex head is much stronger and will not strip even with maximum force.

I bought 2 sets - M2.5x 10mm and M2.5 x 6mm. Replaced all important parts that neeeds disassemble often, like the main bearing block, the tail boom case, the tail gear box etc.

Align Trex 500 bearing list

	Part no#	No#	size
main grip	F5-12G	2	5X12X4
	MR126ZZ	4	6X12X4
flybar	MR83ZZ	2	3X8X3
Seesaw	MR74ZZ	2	4X7X2.5
Mixer, SLIDER LEVER	MR63ZZ	10	3X6X2.5
Mixer arm	FMR52ZZ		2X5X6X2.3
1way	HF101Z		10X14X12
SHAFT	MR688ZZ	2	8X16X5
front pulley,tail gearbox	684ZZ	4	4X9X4
bevel gear	MR128	4	8X12X2.5
TT	MR106ZZ		6X10X3
Tail grip	MR95ZZ	2	5X9X3
Tail thrust	F3-8G	2	3X8X3.5

Align DS 510 digital servo

The align servo is made by MKS. Foreign marketed as sxxx.

The servo gears is nylon and stripped easily on crash (touch wood). The servo gear slop is significant comparing with Futaba digial servo.

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

Almost total my Trex 600N

Sunny day. Very fine weather. Try to start my os50 as it stayed inside the car for almost 4 weeks. Just want to run the engine for a tank.

Just disassemble the starter shaft and it slips with a loosen hex nut. Forgot to tighten the T-arm hex nut. Dissaster happened jsut after 5 mins of violent 3D and it lost control and already dropped into the sea. Luckily, all electronics are safe.

Metal parts including main hub ($180), tail box ($380) are destroyed. The frame, Torque tube are intact. Brand new Funkey blade ($430) destroyed.

Total fix cost ~$1,300 with upgrade of the new align double bearing swashplate ($240?), 600D CF blade ($380) . Also had a major overhaul with change of most bearings >100 flight (Main grip, tail grip, main shaft, seesaw, mixing arm bearings.... )

F16 Airspeed 136kph

Acceleration ~ 17.5 km/s sq
60kph to 130 kph in 4s
(Thrust- Drag)= mass x acceleration

Afterburner Effect

Just got a pre-solder SMD superbright led array that cost ~ HKD60 (with 15 pcs LED, each led has 3 bright spots!) Can use with 6V->12V
Fetch an old GWS brushed ESC.

--{receiver channel mixing with throttle}---GWS ESC -----variable dimming Afterburner

I use a GWS brushed ESC connecting the led array (sold in HK ~7.5 USD for 1 foot with 15 superbright SMD LED, each SMD LED has another 3 bright spot!). The brushed ESC connected to main battery for 12V source, and signal wire connected to receiver AUX channel, which is mixed with throttle channel. At ~5.6V output from the ESC, the led will flicker...)

FMS F35 Lightning First crash & rebuild

Mine finally crashed after a crazy low pass of 1 inch above ground. Side wind roll it and the wing touch the ground, then the chin ..... lipo is ok as it is 1 inch above ground !
































Finally done! USe some kids' soft ultralight clay. Finsih with acryllic paint. Perfect looking!

60mm High power EDF - Airspeed 133kph

5000kv /5T? outrunner ,
3s @38A with 5 blade fan
4s ? A with 3 blade fan.

Thrust--to be tested

Fan Duct Diameter 60mm, Motor case outer diameter 32mm
Estimate Fan Swept Area (FSA) = 20.26 mm sq
80% Exit nozzle ~ 45.4mm diameter

Going to install on either AMX/ Freewing F35 soon.
Power ~ 440W (3S) , Stator temp. 10s ~78 celcius.

**Exit nozzle not yet reduce and result in slower peak speed.**
Jpower AMX In flight test record, motor temp ~52 cel.
Power max 440W, average 380W
Peak current 42A, average 34A
Airspeed 133 kph.