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Old Jul 27, 2012, 10:42 PM
never mind the boll⁣⁣⁣ocks
brosius85's Avatar
Australia, NSW
Joined Dec 2010
1,256 Posts
Quote:
Originally Posted by Kooka View Post
Hey guys fairly new to fourms so hopefully im in the right place Im waiting on my x8 to arrive for fpv use looking for long distance and endurance,I've done a traxxas summit with fly cam and v-eyes but I don't think it's going to cut it for the x8 any ideas thoughts would be gr8 I got about 3-4k to spend cheers also looking for a good tracking system and a yaggi combo thanx
the whole eagletree, CLD, golden CG, spaghetti condenser BBQ, forget a tracker - yagi hats kill any tracker out there just ask david22, he works for the government so he knows.

GLHF
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Old Jul 27, 2012, 11:03 PM
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Daemon's Avatar
Lakewood, Colorado
Joined Aug 2002
28,471 Posts
Quote:
Originally Posted by klique View Post
With the differant planform layout of the X8 compared to the ZII and the foamaro the X8 is not somthing you would even attemp 80 % of the type of flying we do with the ZII.
i have never claimed otherwise. In fact, I've told quite a few people
that they're different planes for different tasks, including in this thread.
Some people think the X8 is a plane that can zoom up and down
steep mountain-sides. It is not. They'll learn.

Quote:
Seing you comparing these on a regular basis is getting old, compare apples to apples please.
I never started the comparison, now or in the past. This time we were talking about winglet
shape, and whether it has an effect on yaw and roll stability. ggtronic brought the ZII into this
thread because he thinks that putting ZII style winglets on an X8 will steady it on the
roll axis. I do not. But I am curious if it'll have a negative or positive
effect on yaw stability. I'm not convinced that the X8 is yaw stable
only because of sweep. I think the airfoil shaped winglets may help.
Guess we'll find out when ggtronic changes em.

And yes, I'm well aware of what the Zephyr can do and I do not consider it
a direct competitor to the X8 *at all*. If you're reading that into what I've
said, then you're simply reading me wrong. I haven't completed mine
because I'm too lazy to cram the gear in the wing, and that's about it.
Same reason I'm not flying any other pure flying wing for FPV.
That and I like having a pannable flight camera with unobstructed side view.

ian
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Last edited by Daemon; Jul 28, 2012 at 01:34 AM.
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Old Jul 28, 2012, 12:13 AM
Never fly an A model anything!
jayb1rdz's Avatar
Antarctica
Joined Apr 2008
4,957 Posts
I have the Zeph Blunt 66" and it is a great flyer but its speed envelope makes some of the gear difficult to tune. The FY21AP cannot cope with the high speed dives capable in the zeph and still provide good stabilisation when flying slowly in the wind.. It flutters like crazy.

I am using only about 10% gain on it for the best compromise. Placing the gear also requires a lot of forethought given it all has to be cut in. Owning and flying both regularly, I find myself flying the X-8 more, mostly because I am preferring to fly very low and quietly. I have dairy cattle.....I dont want to put them off their milk. They're very different animals
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Old Jul 28, 2012, 12:51 PM
AP-stick
ggtronic's Avatar
Montreal
Joined Nov 2005
1,627 Posts
result :

X8 moddedwinglet (3 min 10 sec)
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Last edited by ggtronic; Jul 28, 2012 at 04:37 PM.
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Old Jul 28, 2012, 06:48 PM
never mind the boll⁣⁣⁣ocks
brosius85's Avatar
Australia, NSW
Joined Dec 2010
1,256 Posts
you need to balance your prop mate
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Old Jul 28, 2012, 08:21 PM
AP-stick
ggtronic's Avatar
Montreal
Joined Nov 2005
1,627 Posts
Quote:
Originally Posted by brosius85 View Post
you need to balance your prop mate
agree ... actual motor+prop are temporary...
balance is not so bad... wing wobeling also get things worst... and camera is not properly fix...
i did not built this platform for video... if so i would install GOPRO and
balance the folding prop already... sorry for the HDkey chain jello effect

next step :
--camera instalation pointing down (Ortho-Mosaic)
--APM2 test...
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Last edited by ggtronic; Jul 28, 2012 at 09:43 PM.
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Old Jul 28, 2012, 08:44 PM
never mind the boll⁣⁣⁣ocks
brosius85's Avatar
Australia, NSW
Joined Dec 2010
1,256 Posts
don't just balance it for the video - the vibrations will ruin every part of the plane if you leave them. the motor will have the most problems and will have a drastically decreased lifespan. ask me how i know

FPV disaster (1 min 20 sec)
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Old Jul 28, 2012, 08:56 PM
Wats the worst that can happen
TheCure's Avatar
Canada, BC, Surrey
Joined Jan 2009
513 Posts
love the video.
had me on the edge of my seat :-)
i thought you'd never make it
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Old Jul 29, 2012, 02:16 AM
Registered User
Old Blighty
Joined Apr 2010
1,687 Posts
Just throwing this out there to anyone who finds this of interest/help.

No thrust or pitch-speed data below I know, but I measured this yesterday using the optional motor supplied by BevRC for the X8, paired with a range of Aeronaut CAM folding props on a 3S set-up.



(I'm scratching my head slightly with the 13x11 and 13x10 comparison. I noted the exact same oddity though when comparing these props on a Scorpion motor.)
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Old Jul 29, 2012, 10:35 PM
Oopss. Oh well.
borneobear's Avatar
In the tropics
Joined Jan 2006
3,617 Posts
Quote:
Originally Posted by brosius85 View Post
don't just balance it for the video - the vibrations will ruin every part of the plane if you leave them. the motor will have the most problems and will have a drastically decreased lifespan. ask me how i know
+2 . Great video!
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Old Jul 29, 2012, 10:42 PM
Micro Boat Forum Founder
boredom.is.me's Avatar
United States, GA, Buford
Joined Nov 2007
6,497 Posts
Quote:
Originally Posted by brosius85 View Post
don't just balance it for the video - the vibrations will ruin every part of the plane if you leave them. the motor will have the most problems and will have a drastically decreased lifespan. ask me how i know
That had me squirming in my seat! Awesome save.
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Old Jul 29, 2012, 10:46 PM
Outta Sight
Australia, WA, Joondalup
Joined Jul 2008
929 Posts
+3 Great vid, it doesnt get much closer than that.
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Old Jul 29, 2012, 11:54 PM
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Daemon's Avatar
Lakewood, Colorado
Joined Aug 2002
28,471 Posts
A less aggressive dive would have produced a lot more margin. The
drag goes up with square of airspeed, so diving steeply burns off
energy that you won't get back in distance when you level out.
Better to pick an angle that gets your ground speed up without
maxing out your airspeed.

ian
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Old Jul 29, 2012, 11:57 PM
Outta Sight
Australia, WA, Joondalup
Joined Jul 2008
929 Posts
*Yawn*
Great landing, squares or not.
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Old Jul 30, 2012, 12:14 AM
Houba ! Houba !!
rcmonster99's Avatar
United Kingdom, England, Milton Keynes
Joined Sep 2003
6,069 Posts
Quote:
Originally Posted by Daemon View Post
A less aggressive dive would have produced a lot more margin. The
drag goes up with square of airspeed, so diving steeply burns off
energy that you won't get back in distance when you level out.
Better to pick an angle that gets your ground speed up without
maxing out your airspeed.

ian
I probably would have dived the same way if I know there was a strong wind against me. It was a close have though!
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