Hobby Zone Delta Ray HBZ7900 Data Sheet

Before each flying session, and especially with a new model, you should perform a range 

check. Refer to your transmitter manual for more information. 

Move the trim sliders for the controls as they are assigned on your transmitter. Familiarize 

yourself with your transmitter’s controls and the aircraft’s response before flying by 

performing the recommended Control Direction Test.

Trim the elevator at 50%-60% throttle. When the elevator is trimmed correctly, your aircraft 

will fly level at half throttle, climb steadily above half throttle and descend below half throttle.

•  If the aircraft’s nose drifts up or down while the elevator stick is at neutral (centered) 

position, move the elevator trim slider by one or two “click” increments in the SAME 

direction as the drift. 

When trimmed correctly, your aircraft flies with wings level.

•  If the aircraft drifts left or right when the aileron stick is at neutral (centered) position, move 

the aileron trim slider by one or two “click” increments OPPOSITE the direction of roll. 

If you must use more than 8 clicks on a trim slider to make the aircraft fly straight and level, 

land and adjust a control surface as described below.

 

 

Perform manual adjustment of trim before increasing the throttle above 25% or SAFE will 

move control surfaces when the aircraft is moved. 

Return any trim setting on the transmitter to neutral by pushing the trim slider to the middle 

position, then adjusting the clevis on that control surface to position it the same as it was with 

the trim slider offset.
1.   Remove the clevis from the control horn.
2.   Turn the clevis (as shown) to lengthen or shorten the pushrod.
3.   Close the clevis onto the control horn and slide the tube towards the  

horn to secure the clevis.

IMPORTANT: Consult local laws and ordinances before installing and operating any type of 

photograph-capable or video recording device in this product.

•  Mount the optional keychain camera mount (

A) (HBZ7920, sold separately) on the top of the 

fuselage (

B) in front of the wing using double-sided tape (C).

NOTICE: Removal of the mount may damage the aircraft paint.

90 ft

(28 m)

Up Trim

Down Trim

Left Trim

Right Trim

HBZ1004, 

HBZ1004EU, 

HBZ1004UK

1.5 AC power supply (US only)

Hobbyzone 1.5A Netzteil (Nur EU)

Alimentation 1,5 A courant alternatif 

Alimentazione 1,5 A CA (Solo EU)

This extra information is not required to fly your aircraft out-of-the box, but is provided to help 

you once you’ve gained some flight experience. It may also help you after repairs have been 

made to the aircraft.

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