F18 90mm Nose strut

The shock absorbing strut works perfectly and one can actually see the nose sinks as the plane lands at nose high angle.

Much lighter that the stock retract and easier to the retract servo.

Bae Hawk shortened nose gear

Shortening the front nose gear makes her never bouncing on landing.

The wire needs some dremel to lock the control arm in position. Now she lands like sticking a magnet !

SAPAC 70mm EDF revive

Very agile and predictabel control F16. Recently upgraded from 400W EDF to 800W. The performance is excellent.

Lightex film is ironed onto the wing, to reduce drag. Lightex on foamy is suprisingly good in reducing drag.

With OK Model inrunner EDF, this F16 flies like composite model.

Eflite Haw - Test flight with Flap modification

The flap is added to slow down the plane on descend.

Smart looking nose strut.

The A4 Sky Hawk is much faster and needs extra attention to fly.

DX7 Switching 3.3V power supply

DIY a 3.3V switching power supply from a 12V to 5V USB car adapter. My DX7 can now run 40% more air time.

Eflite Hawk Flap Modification

Changsun nose strut with "shock absorbing" spring.

This Hawk flies so nice but needs lots of attention when landing. The relative high speed on landing also makes her bouncing. How nice to add flap to slow her down and avoid stall. Simply adding reflex does not make a good solution for perfect landing.

The flap modification is pretty straight forward by cutting along the aileron to the wing root. A servo can be easily attached to the fuselage and a link control.

OK Model A4 SkyHawk Modification

The fastest model of this class with small wing area and high wingloading.

The relatively easy to stall on banking turn is partly explained by the high pressure at wing bottom is stolen into the cheating hole under the fuselage. Therefore, transparent sheet was added to act as guard to prevent high pressure air sucked into the EDF.

Test flight confirmed no easy stall on high bank angle turn, which happens easily on high bank angle turn from downwind to headwind direction.

She is now back to service and flying experience gives more fun than worry.

Eflite Bae Hawk

Very nice finish and scale The intke is small and the profile helps to reduce drag.

Stock motor runs at 60A @14.2V ~840W.

The fixed landing gear produce much drag. Will be modified to electronic retract soon, after I can handle the landing behaviour of this bird.

Will add flap to make landing more easy. She bounces too much with the stock landing gear.

Maiden flight. No trim in and 70% throttle only. She really needs flap to slow her down.