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Old Feb 08, 2010, 01:12 AM
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Originally Posted by Sleurhutje View Post
Nope, that isn't mine. ...
So the pink FunJet isn't yours?

The pink "Flash" I just used for the Barbie reference.

Jürgen
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Old Feb 08, 2010, 05:28 AM
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Quote:
Originally Posted by Jurgen Heilig View Post
So the pink FunJet isn't yours?

The pink "Flash" I just used for the Barbie reference.
Ah, okay. Yes, the pink FunJet is mine. Although in daylight it's more red but due to the metallic it turns pink in most pictures, except the fuselage. I wish the Barbie Jet was mine...
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Old Feb 08, 2010, 03:03 PM
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Austria - Styria - Graz
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Quote:
Originally Posted by Sleurhutje View Post
....... I wish the Barbie Jet was mine...
...... and the girl... must show you how to fly this jet


( OT off )

Greetings

Norbert
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Old Feb 09, 2010, 04:22 PM
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Need some help about picking the right motor. I don’t need a ballistic Xeno, but it also won’t see the slope very often.
My reference is the motormount sold by KD. With a AXI 2203/RACE and a 98g lipo in the front there is no ballast in the nose needed. AUW is in that case about 680g.

Because my Xeno is still on its way I have to make a guess about measurements but it looks like the motor will be mounted about 170mm behind c.o.g. and the lipo about 135 in front of c.o.g.
This means:

Using an AXI 2212/20 (57g), I would need with my 1000 mah Rhino’s (96g) 30-35g ballast in the nose.
The AUW will be about 765g.
Gerhard Hanssmann wrote on a german forum that you’ll need a lipo of about 140 – 160 gr to achieve the right c.o.g. with this setup; it seems that in that case my assumptions are ok (the 30-35g ballast will be more in the front compared to the c.o.g. of the bigger lipo).

Using a lighter Hyperion ZS2209-24 (45g), I would need with my 1000 mah Rhino’s (96g) about 20g ballast in the nose.
The AUW will be about 738g.
Only drawback of this motor is that I can't directly mount a composite hub (?) to the motor like with the AXI; I have to use a hub with a collet-adapter or whatever - this could add a few grams.

The ZS2209-24 seems by looking at the weight and comparing it with the Tuningmotor a bit weak for the Xeno but it has a max current of 19A and these are impressive numbers (I will use a folding prop):
Prop / Cells / V / A / W / RPM
APC 8×4.7SF / 3S / 11.79 / 14.1 / 167 / 9750
APC 9×3.8SF / 3S / 11.75 / 15.8 / 186 / 8985
APC 9×4.7SF / 3S / 11.77 / 14.7 / 173 / 9600 = 235 W/kg!!!

So to all you Xeno-guru’z: what is the most smart choice?
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Old Feb 09, 2010, 05:08 PM
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Hi ZamBeZi

I use this AXI 2212/20 in an other Plane ( AUW 750 -800 g )
ESC 30 A and a Aeronaut 9x5 Carbon CAM folding Prop.
works fine, i think this setup will also work in XENO


Greetings

Norbert
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Old Feb 10, 2010, 01:09 AM
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Quote:
Originally Posted by ZamBeZi View Post
(I will use a folding prop):
Prop / Cells / V / A / W / RPM
APC 8×4.7SF / 3S / 11.79 / 14.1 / 167 / 9750
APC 9×3.8SF / 3S / 11.75 / 15.8 / 186 / 8985
APC 9×4.7SF / 3S / 11.77 / 14.7 / 173 / 9600 = 235 W/kg!!!
You can't compare Slow Flyer props with E-props (including folding props) or nitro props. A SF prop will certainly give you more torque at low speeds. When using other types of prop you'll need more prop speed for the same amount of torque.
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Old Feb 10, 2010, 01:31 AM
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Quote:
Originally Posted by ZamBeZi View Post
...
My reference is the motormount sold by KD. With a AXI 2203/RACE and a 98g lipo in the front there is no ballast in the nose needed. AUW is in that case about 680g.
With a 96g battery in the nose, the CG is right at approx. 220mm. Any extra weight behind the CG will shift the CG backwards. Even when using the extremly light AXi 2203, your CG will most likely be at the rear end of the CG range.

Quote:
Originally Posted by ZamBeZi View Post
...
I will use a folding prop
...
Wise decision.

Quote:
Originally Posted by ZamBeZi View Post
...
...Prop / Cells / V / A / W / RPM
APC 8×4.7SF / 3S / 11.79 / 14.1 / 167 / 9750
APC 9×3.8SF / 3S / 11.75 / 15.8 / 186 / 8985
APC 9×4.7SF / 3S / 11.77 / 14.7 / 173 / 9600 = 235 W/kg!!!
...
All those props are unsuitable, as they run way past their rpm limit:

SF rpm limit = 65.000/Prop diameter

Jürgen

P.S.: Something is not quite right with the 9x3.8SF prop data. It should draw less amps than the 9x4.7SF prop. There also is no 8x4.7SF, only 8x3.8SF or 8x6"SF.
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Old Feb 10, 2010, 01:37 AM
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Quote:
Originally Posted by Sleurhutje View Post
You can't compare Slow Flyer props with E-props (including folding props) or nitro props. A SF prop will certainly give you more torque at low speeds. When using other types of prop you'll need more prop speed for the same amount of torque.
You probably meant "thrust" not "torque".

Jürgen
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Old Feb 10, 2010, 03:18 AM
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Thanks for the replies!

Norbert; any idea how much amps you're drawing with that 9x5?

Jurgen: I calculated the ballast I need in the nose to achieve the same c.o.g. as the extremely light KD-setup (220mm). I did this to compare the different setups. If I would need to add a few grams to have a more forward c.o.g., this would be the case for every setup and shouldn't be a big problem I guess.

Sleurhutje / Jurgen; like I posted above I don't intend to use SF-props, but the numbers show that the ZS2209-24 seems very capable to turn a serious prop with serious rpm's (typical current 8A~14A and 19A peak for a 45g motor is quite impressive).
The big question is: "which FOLDING prop", AND: "will this 2209-24 be the better of the 2 options"? (the airframe will weight about 27g less with this motor compared to the Axi)
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Old Feb 10, 2010, 04:21 AM
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Hi ZamBeZi

I made a log with AXI 2212/20 ESC Jeti Advanced 30 and X-Cell 1500 3S 25C with 9x5 Aeronaut Carbon Cam folding prop
The performance its not Hotliner like. but works fine

Hope this may help you

Greetings

Norbert
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Old Feb 10, 2010, 05:20 AM
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Thanks!
I hope also that someone can post something usefull about the ZS2209-24 in the Xeno; I don't want to wait too with ordering...
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Old Feb 10, 2010, 05:43 AM
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Originally Posted by ZamBeZi View Post
...
I hope also that someone can post something usefull about the ZS2209-24 in the Xeno; I don't want to wait too with ordering...
Of course you can use such a motor in the Xeno, provided you build your own motor mount.

Jürgen
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Old Feb 10, 2010, 08:16 AM
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Originally Posted by Jurgen Heilig View Post
Of course you can use such a motor in the Xeno, provided you build your own motor mount.

Jürgen
I intend to do that, but I do you think, looking at the specs above and using the correct prop, the power will be sufficient?

Dennis
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Old Feb 10, 2010, 09:10 AM
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Originally Posted by ZamBeZi View Post
I intend to do that, but I do you think, looking at the specs above and using the correct prop, the power will be sufficient?

Dennis
Sure, you can adjust the power via prop size and battery (20C - 40C).

Jürgen
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Old Feb 10, 2010, 01:34 PM
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Got mine today

First impression: those wings are heavy! on the other hand: the Xeno isn't much more than a wing
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