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Old Nov 11, 2012, 12:55 PM
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Imagecatcher's Avatar
NSW Australia
Joined Mar 2010
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Quote:
Originally Posted by rsands2801 View Post
its underpowered. no question about it...if it was right tension it would have sailed way further. 13-14kg is alot of pull, its way more than what you think it feels like
But when i attach a set of luggage scales to the cradle it is pulling 40kgs! Plus the motor @ near full whats to fly out of the wing rests before release.
Its 5.50am, not a breathe o wind, im getting up! Report Success or Fail soon.
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Old Nov 11, 2012, 01:02 PM
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Lakewood, Colorado
Joined Aug 2002
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How much tension when stretched to the midpoint of the launcher? I'm guessing you're
only getting 40kg in the last few cm of stretch and it's dropping almost instantly
as soon as the plane moves.

ian
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Old Nov 11, 2012, 01:04 PM
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ITALY
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Quote:
Originally Posted by brifa View Post
how many cm behind or forward the holes under the wings should i put the CG??
and which is the best place to put the video tx?? i have the uhf antenna on the right in the middle of the plane at 5 cm from the wing joiner..

thanks
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Old Nov 11, 2012, 01:09 PM
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Lakewood, Colorado
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Quote:
Originally Posted by brifa View Post
how many cm behind or forward the holes under the wings should i put the CG??
As has been many times in this thread, the CG should be at the rear edge
of the front finger holes.

ian
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Old Nov 11, 2012, 01:24 PM
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NSW Australia
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Quote:
Originally Posted by Daemon View Post
How much tension when stretched to the midpoint of the launcher? I'm guessing you're
only getting 40kg in the last few cm of stretch and it's dropping almost instantly
as soon as the plane moves.

ian
I'll check that out Ian
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Old Nov 11, 2012, 01:42 PM
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United Kingdom, Scotland, Oban
Joined Jun 2012
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ImageCatcher - its not just about tension but duration of pull and how fast the level of pull declines.

My launcher pulls the same as Coyotes - about 12kg - but it pulls for over 4 seconds. From launch it will climb to about 30 metres - high enough to do a full lap of the field and land back at my feet without ever touching the throttle ie just the bungee.

My guess is that your launcher (as Coyote said) is an animal at launch but within a few inches has 'shot its bolt'.

X8 Maiden Flight - Alba Aviation (1 min 40 sec)
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Old Nov 11, 2012, 02:00 PM
Youtube: TomRi25
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Croatia, City of Zagreb, Zagreb
Joined Aug 2010
715 Posts
X8 plane FPV flight 3km out and back (3 min 24 sec)


for now... link is solid and gonna push it a bit more...


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Old Nov 11, 2012, 02:31 PM
Praying for better weather
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Joined Dec 2007
4,151 Posts
Not bad mate, they really are good for covering range with 2x large lipo`s on board, I wanted to fly mine with 4x but it just seems way to heavy for it, and the extra weight I think will kill the cruise current draw but I`m yet to try it.

I suppose I should post a video up as I don`t think I have apart from the spin video

X8 10km FPV flight (7 min 10 sec)


Stupid JapanDVR that is supposed to be great froze and didn`t record the FPV cameras transmission. Luckily I was broadcasting live over Justintv.com to the UK forum lads so managed to download the live uploaded video from there to add to the Gopro footage.

10km done, but after landing as I thought previously Hornet OSD current sensor is miles out, over 30% in this case so could have gone a lot further.

Now I have swapped Hornet / FY31AP out for RVOSD Gen 5. Also now swapped out the motor for a Turnigy SK 840KV motor on a 12x8 prop so should now be able to push it knowing the current usage will be accurate and have a faster but more efficient cruise.
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Last edited by Coyote64; Nov 11, 2012 at 02:43 PM.
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Old Nov 11, 2012, 02:55 PM
Youtube: TomRi25
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Croatia, City of Zagreb, Zagreb
Joined Aug 2010
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thnx,
but yours is great!
what gear do you use?

I have
2x 5000 4S onboard, turnigy 830KV motor, aeronaut folding 13x6.5 prop
rangelink 433 LRS
racewood vid RX
readymadeRC 1500mw 1.3GHz TX
Ibcrazy skew planar on model and crosshair 10db at my side. (both from readymaderc)
on second flight I've put on 500mw racewood tx to compare, vid was clear as 1500mw, same distance, so I guess there is some more range left to try
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Old Nov 11, 2012, 03:06 PM
Praying for better weather
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Joined Dec 2007
4,151 Posts
For that flight I had

WDR650 Camera
Gopro
ImmersionRC 2.4ghz 500mw
Home made cloverleaf ( to clear carbon of prop )
Chainlink UHF
2x 5000 4S Nano-Techs
Hornet OSD + FY31AP
Telefly OSD ( for antenna tracking )
12v PSU
Circular-Wireless 12dbi helical
Scorpion 2030 1110kv V2 with a 10x6
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Old Nov 11, 2012, 03:10 PM
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Lakewood, Colorado
Joined Aug 2002
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1500mW is overkill.
I can reach out 4.5km easily using CP omnis (CL + SWP) on only 600mW (FOX800)..
Been well past 10km with a Crosshair on the Rx and could go much further.

ian
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Old Nov 11, 2012, 04:25 PM
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ITALY
Joined Aug 2006
418 Posts
so at 440 mm from the nose??
why somebody says it's better at 445 mm from the nose??


Quote:
Originally Posted by Daemon View Post
As has been many times in this thread, the CG should be at the rear edge
of the front finger holes.

ian
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Old Nov 11, 2012, 04:51 PM
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Canada
Joined Jul 2009
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Quote:
Originally Posted by brifa View Post
so at 440 mm from the nose??
why somebody says it's better at 445 mm from the nose??
5mm doesn't make one bit of difference.
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Old Nov 12, 2012, 12:51 AM
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Joined Nov 2012
7 Posts
Hey guys, been looking through these posts, very interesting. I just ordered my X8, whats a good endurance package for it that will have good power and long flight?
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Old Nov 12, 2012, 01:05 AM
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Joined Nov 2012
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Hey Coyoto or anyone else, i see everyone says 2x4s battery ect ect. By this do you mean you have soldered them together to both power your motor? or is just 1 powering the motor and one doing cameras ect?
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Last edited by 7536jake; Nov 12, 2012 at 01:39 AM.
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