Align refuse to repair my 35A ESC 亞托拒修電變

So disappointed that Align failed to repair my burnt ESC. I send them 2, but they refused to repair one of them, saying the board is badly damaged. I paid them to repair one of them, the other one, they refused to replace or repair and sent back to me.

I definitely will never buy align ESC again as there are so many cheap and reliable choice in the market. The cost of repairing is more than buying a new one.

F18 90mm EDF Flight Video

Some acryllic paint to hide the servo and wires/.
Down flaps setup for landing.

Motor cover flied away mid-flight.

Landing with flap make it much easier to land/ "float " onto ground.

Retractable gear F35 crash again

Just fixed it from the last crash resulted from loosen clevis. Now the full movement taileron is modified to a hinged type.
Successful and more predictable control. An abnormal 90 degree roll kick is already noticed at end of third flight and resulted in safe emergency landing. So stupid to put her up again without figuring out the reason.

Finally, ended its life into a dead spiral after the 4th flight, preceeded by violent roll after banking turn. Apparently no mechanical failure can explain the cause. Still investigating the cause. Suspect receiever lock from overheat BEC.

FPV Pan and Tilt CCD

TAHO CCD camera bought 8 years as home surveillance. High resolution with 480lines CCD Auto exposure and saturation is excellent.

E-speed flyer fomr x-flight.hk

The main wing anchoring is not pre-drill but it should be easy.



Some bit on the side needs to be dremel away to avoid binding witht the aileron linkage.

Very streamline and smart look. I get bored with the look of a typical pylon. This one looks great. The rudder fin is not added yet.

All pieces out of box. All hinge, linkage wires, horns, and spinner .... are included.

• MaterialFibre glass fuselage, balsa sheet foam core main wing.

• Wing Span916mm• Length800mm

Flying weight: with 3s 2200mAH, 680g

My first pylon. Fiberglass fuselage. Very superb painting. Installation needs some tools like drill , as you need to drill holes for the link rods, ,main wing anchoring etc.

Very fast pylon, with very light setup of 3s 3000kv @30A , 4.5x 4.1 APC, the speed reach 160km/hr. I used my old trex450 450TH motor. The motor is over 200 flight before and the front bearing is worn off. Cause vibration at 2/3 throttle.

Now upgraded to 4s 3600kv motor, rated 52A with 4.1x 4.1 APC. Plan to break my 200 kph speed limit.

OK-Model 70mm EDF

70mm fan, thrust 1.1kg @ 600W, ~1.8g/kg

http://www.okmodel.co.jp/catalog/accessories/Ducted-fan/index.html

Starmax 90mmEDF F18

Openable Canopy

Much larger than SAPAC 70mm F16
Very scale looking, though the landing gear is a bit too long


I love the skull decal

Fully armed



Ready to bomb !!

The intake is sexy !

AP700 70mm EDF

This fan is made by airpower? and most cheap 70mmEDF foam jet came along with this knock-off fan. Difficult to find some detail test of this fan. I got 3 of them and all of them perform poorly in terms of thrust and speed. My recorded thrust (no intake lip)

3600kv BL test: @3s/ 11V, 19A (Power 200W) thrust 340g
@4s/ 14.4V, 22A (power 316W), thrust

4100kv motor test: @3s/ 11.7V, 80A (Power 936W), thrust 910g, 0.97g/W !!! So disappointing, low efficiency at high power use. No efflux speed test.

Another the world model 70mm EDF test reslt:
@3s/ 11V, 22A, thrust 440g; ~1.8g/ W

No name F35 70mm EDF taileron modification

Cockpit and nose repaired with super light clay , after last crash caused by broken clevis. I like this F35 very much as it is not easy to find EDF of this size with stock retracable gears.

The taileron is modified from "full motion" to 2 piece type. The original design has too much slop and result in instability after recovery from a roll . The original design is for 2 servos to drive the tail as elevator. But I want to save weight and use taileron, instead of additional aileron. This saves 35g.

Starmax F18 Wing reinforcement

Decal put on. Looks much much better now.




Wings underneath strengthened with fiber tapes.

Weight loading test with additional 600g weight on top.

Left: fiber tape reinforced. Right: No reinforcement.

90mm EDF 1.5m F18 Hornet

Wingspan 1010mm

Fuselage length 1500mm

Flying weight 1700g

90mm EDF 1600kv Align 500L brushless

Static thrust 1750g (outside fuselage test)

Current 52A @ 6s, Power ~1000W

Thrust to power ratio : 1.8g/W

Drop tank and missles not added, to test how strong the landing gears first. The rear landing gears are safe. The front socket needs some modification to increase the contact area.

The spring loaded retracts work perfect and landing is so soft and scale like. First flight is not smooth as I forgot to check the CG before putting a lighter 2800mAh lipo (from my trex 500). Landing in high nose position and the front gear socket pulled off in piece (despite I sanded it thoroughly, prove to be the small contact area). Should be easy to modify by screw on a longer piece of balsa.



Next workshop mission:

1) strengthen the wing root

2) stronger landing gear servo. Towerpro 9G won't do the job well.

3) Epoxy the fuselage to give a glossy look! As dirt build up easily.

4) Lots of magnet to hold the missiles, drop tank ...

High torque Atom brushless in Trex 500

Eagletree log. Max 1600W. Don't bother to check the rpm. Impression is 15% more power than the stock 500L Align brushless.

After violent 3D with pitch pumping continuously . If using Align 500L, the temperature will definitely be over 102 deg celcius. (at ambient temp 26deg Cel)

A drop fit into the trex 500 with no modification. 19T is needed for this motor because of the low kv 1080kv? I did not measured the headspeed, but defintely faster than the stock 500L (getting soft after 70 flights) on 13T.

19T has noticeable drop in the headspeed near end of flight. 20T may be a good choice as it may have more room to allow governor to control more consistent headspeed. This atom motor just don't bog at any pitch pump.

Lipo in transmitter may have auto-cut protection circuit

Protection IC board of each cell, autocut at around 2.9-3.0V

發覺有D發射鋰電居然每cell有安全ic電路板, 降至2.9V 會自動cut, 保護粒cell過放, 但支控電壓顯示9.4V , (e.g. each cell ~3.2, 3.2, 3.0) , 有機會支控未beep(9V alarm) , 粒電保護circuit 會cut 電, 支控即死建議

1) 用到 11V 要收手, 但會唔記得 (cause slow discharge will deeply drain the lipo, unlike we use for motor)

2) check 發射鋰電 有冇保護ic電路板

3) set 高D Voltage alarm , 如10V,DX7 在隱藏menu 可set

Align 500L 1600kv in 90mm EDF

This is a stock fan for Starmax 90mm F18, for fuselage length 1.6m. Align 500L is rated officailly at 800W, but I believe it can much better than that. Since Align's outrunner is factory balanced , it is a perfect outrunner for EDF. The motor mount inner diameter of the EDF is only 37mm. Wheras Scopion 30xx outunner has a diameter of 37.5mm. To put in the Align 500L (diamter 37mm) , some sanding is needed.
Some 8mm spacer is needed to mount he fan without touching the case base. The alumnium hub is better inserted as deep as possible to avoid wobbling.
The fan is well balanced with minimal abrasion. Most of the vibration comes from the aluminium hub as the 5mm motor shaft hole is off-center !

Bench test 1.75kg thrust with 51A @ 21V(6s). ~ 1.7g/W

Different 64mm EDF comparison

SAPAC 64mm- This one is worn out after 60 flights over sandy runway. Almost same pitch as J-power fan, but smaller in breadth. Blade hardness is the middle of the 3. The central hub is badly center. Suprising the vibration is not noticeable. Anchoring with 2 hex set screw.

J-power / Freewing 64mm EDF -Best propeller, strong hard blades. The central hub is slightly off center as it is press fit.

GWS 6 blades- smallest pitch , weak and thin blades. Hub .. pending test