Jpower F4N Maiden

Maiden is an unexpected disaster. Overloaded with heavy 2200mAh lipo, it rolls suddenly to right, that downwind nose high, stall and crash. Lucky enough, just 1 foot away from the sea. Otherwise, all eelctronics will vanish ....

Repair job takes 1hour ... up to the sky next week
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Maiden successful after readjust CG to 1cm forward of factory recommendation. It measured 9cm from leading edge (measure from frontmost of wing , not joint).

J-power Eurofighter Maiden

Successful maiden !
Speed is fast, though not to the extend of FMS F35. Cause this EF2000 is much larger !

First Take off is a bit difficult bevause the stock front landing gear is too long!

In flight with canard, the pitch control is more responsive .

Landing is not too satisfactory as the front landing gear is too backward and are too long. I will see if I can move the front landing gear more forward and make them shorter. 2mm wire is too flimsy for this big bird.

Jpower Eurofighter

This bird is much bigger than my Mirage 2000 68mm EDF

































Twin 64mm EDF

F117 隱形戰鬥機

A firend of mine got this F117. Very detail molding. Great looking stealth plane. The elevator needs a large travel as the swept control surface generate smaller lever force.

J-power F-4 Phantom Mini EDF 幽靈式戰鬥機

Again, J-power make a superb EDF warplane. This F4N is even easier to installed then my AMX. Even the tai elevator is pre-installed. However, the factory left the front wheel steering installation for you.

I found the rear landing gear is designed too far back from the C.G. Therefore, I reversed the gear base mount to make it lies closer to the C.G. to make take off easier.

The tail horizontal fin is a bit thin/weak if one intended for a decent fast EDF. I will definitely strengthen the elevator if it can fly fast.

This is the first time I can see pin hinges are used in a small EDF . This reduce the load on the servo and is slop free.

There are 4 magnets for the canopy latch. I think that is too much and I relocate 2 magents to the rear ESC compartment latch.

Exit nozzle diameter = 3.7cm. Two exit nozzle area = 21.5 mm sq
Intake duct diameter = 64mm. Fan Sweep Area= 26.85 mm sq
Exit Area = Exactly 80% of FSA (Good factory design !)