Zoom Zoom 4D

[Simys]

Would appreciate if someone could recommend the CG and the battery placement for configuring the 3D setup, the best that if you could attach with photos of your current setup.

Thanks in advance.

My configuration would be :
1. Axi 2212/34 (Not sure Axi 2212/26 would make the hovering difficult?!)
2. Etec 1250mAh 3S1P
3. Castle Creations Esc 25A
4. Rx - haven't decided yet, 29MHz RCM R900S would seem to be a bit too heavy. Any recommendation?!

[tampines flyer]

well i try the axi 2212/34 don't give much power in hover even use 3s 1500 20 c .well change to 2212/26 .prop apc 10 x 5 or 7.well it will give u power and perform. even on 3s 1450 12c.well mack have a good deal for that mtr.try contact him.well i use normal recv. the batt pack should be near the wing .tks .well buddy it a gd plane ,

[Simys]

well i try the axi 2212/34 don't give much power in hover even use 3s 1500 20 c .well change to 2212/26 .prop apc 10 x 5 or 7.well it will give u power and perform. even on 3s 1450 12c.

Regarding the power and perform, are you referring to the speed and vertical up thrust that zz4D could achieve! Would I be able to get it hover steadily on Axi 2212/26?

I would refer zz4d to fly slow and steady and has it hover in front of me and does a slow knife-edge fly pass.

[tampines flyer]

sure but not on 2212/34. for 26 if u want power low or hight it can perform.but not 34.well u need skil for low hover

[Simys]

sure but not on 2212/34. for 26 if u want power low or hight it can perform.but not 34.well u need skil for low hover

That's was I am worried about if I am using Axi2212/26. Hard to control the power if I am doing low hover and knife-edge unless I adjust the travel trim.

[tampines flyer]

well if u use a 2212/34 suddenly u need power to uprite from your fall it can not support well for 26 is defrent

[Simys]

Are you using firewall to support your Axi motor or you use the original mount that came with ZZ4D?

[gowest]

Are you using firewall to support your Axi motor or you use the original mount that came with ZZ4D?

Hi Simys,

Glad to see you into ZZ4D! Would like to share with you my buddy Dennis setup for his bird that he demonstrated for my reference. I am also in Zoom 4D.

He has highly recommeded the Battery be place and wing center-cord as shown in pics and also have the firewall re-inforce by the 2mm ply instead of the stock fibre-glass. You have to epoxy-coat the firewall to water-proof it.

The CG for the batery placement is for hovering torque roll purpose most of the time thus it is good after he did some conclusive trial and errors...

Recommended setup:
1) AXI 2212/20
2) 3cell Kokam 1250 20C
3) 25 amp esc
4) all other servos as per normal
5) ATV at max and servo horn on the aileron must use an extension to maximise the travel...

Other mods/tips:
1) change all metal rods to carbon rods to reinforce the fuselage
2) Motor-mount area needs to be re-inforced with some carbon strips (10mm) to minimise head-down impact
3) AUW should be less than 700g

Happy building

[Simys]

Gowest, thanks a lot on the photos.

Could you take some close in shot on the Axi motor mounting and the aileron servo mounting from Dennis, thks.

I have planned to use carbon 10mm spar to strengthen the fuselage. Did Dennis do the 2 degree adjustment to the right for mounting the Axi motor as recommended in the manual?

Dennis, how was the throttle control during your hover? Was it very sensitive?


Gowest & Dennis, thank you for the helps and recommendations.

[gowest]

Gowest, thanks a lot on the photos.

Could you take some close in shot on the Axi motor mounting and the aileron servo mounting from Dennis, thks.

I have planned to use carbon 10mm spar to strengthen the fuselage. Did Dennis do the 2 degree adjustment to the right for mounting the Axi motor as recommended in the manual?

Dennis, how was the throttle control during your hover? Was it very sensitive?


Gowest & Dennis, thank you for the helps and recommendations.

you are welcome just sharing 2 cents...
regarding right thrust yes it needs 2 deg due to torque.
Torque roll at slightly above 1/2 throttle
Immediately respond on vertical bail out but sluggish towards full throttle.
Maybe it's your choice of motor.

Oh yes forgot to mention we all use APC E-prop 10x4.7.
Flight-time about 6-8 minutes normal and 5 mins intensive hover.

Many variable factors to improve current performance perhaps you care to share after your discovery through Trial and Errors?

[gowest]

Hi Simys, here are the motor mount pics you've requested (sorry a little off-focus)...

[Simys]

Gowest, your photos speak a thousand words.

Torque roll at slightly above 1/2 throttle

These was what I have observed when I tried to do hover using whirlwind. I would expect a similar experience when I would be going to hover in Zoom Zoom 4D. Gee...I have already figured out to change to different pre-trimmed mode of the plane by toggle one of my 3-way switch in Jr 9xV2 transmitter. That's meant - mode1 for normal flight, mode2 for hovering and mode3-perhaps for knife-edge.

[YZY]

Do the mixing manually lah use ur fingers!

[Simys]

Do the mixing manually lah use ur fingers!

Should make full use of what the Tx can offer, or else a 4-channel Tx could simply do the job .

[Simys]

Could anyone advise on the CG? How far should it be behind the leading edge of the wing? Should I follow the recommended CG (105~130mm) from the building guide?

Thanks.