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Old Nov 28, 2012, 12:01 AM
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Canada, AB
Joined Jun 2010
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ZII cruise/stall speed

Quote:
Originally Posted by Hmerly View Post
I like pan/tilt on slower flying planes, something like the zii it just isn't too good an idea. It'll also be the first thing you break, happens all the time.
Thanks for the super quick reply.

S what is the stall speed of the ZII? I assume the glide angle in the wing is non existent? If so I guess you got to be on the TH all the time?

So after about 30 mims reading between posts and google searches, OK P&T, bad idea on this platform. I guess it wil be my GP for capturing flight and my SC2000 600TVL to fly from.
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Last edited by lemonsorbie; Nov 28, 2012 at 12:39 AM.
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Old Nov 28, 2012, 08:11 AM
Aerial DP
United States, CA, Lakeside
Joined Apr 2010
912 Posts
my zii with gopro, full osd pro setup, pair of 3300mah 4s, ice 75 stalls at 12mph
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Old Nov 28, 2012, 09:37 AM
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Old Blighty
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Quote:
Originally Posted by Kloner View Post
my zii with gopro, full osd pro setup, pair of 3300mah 4s, ice 75 stalls at 12mph
Hmm, are you sure? For a 2.5kg ZII the stall speed should be more like 23 MPH.
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Old Nov 28, 2012, 10:01 AM
Mum is the word!
Joined Jun 2003
6,793 Posts
The Glide ratio is not bad at all, the wing really dose fly , its not a dead heavy duck like alot of other planes.
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Old Nov 28, 2012, 12:00 PM
Aerial DP
United States, CA, Lakeside
Joined Apr 2010
912 Posts
i'm positive, this is airspeed but there was no wind
ZII FPV maiden (19 min 1 sec)

11:20, forgot about the throttle on my maiden

when it lands too, i flare up by accident and throw it down but that was 15-16mph touching down
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Old Nov 28, 2012, 12:52 PM
Some call me the other guy!
DoctorAudio's Avatar
Milwaukie , Oregon
Joined Feb 2003
4,494 Posts
Quote:
Originally Posted by Ian Davidson View Post
Hmm, are you sure? For a 2.5kg ZII the stall speed should be more like 23 MPH.
I would say the same thing about 10 to 15 mph!
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Old Nov 28, 2012, 04:01 PM
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United States, TN, Clarksville
Joined Dec 2011
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Hey guys I flew into the clouds for the 1st time yesterday and it was awesome! But I'm wanting to change my setuf on my z2 from a 3s setup to maybe a 4 or 5s setup. I'm only able to fly for maybe 15-17 minutes on 2x 3300 3s packs what are you guys using? And what are your flight times? I'm trying to do some distance flights and I'm only getting 3 miles away before I'm having to turn around.
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Old Nov 28, 2012, 04:05 PM
never mind the boll⁣⁣⁣ocks
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Australia, NSW
Joined Dec 2010
1,256 Posts
you need tu use more throttle control of use bigger batts bro.

also using a good size motor can increase your efficiency.
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Old Nov 28, 2012, 04:10 PM
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United States, TN, Clarksville
Joined Dec 2011
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I'm using the riewing motor that the z2 comes with along with the esc that it comes with. If I just want to cruise it's pulling 30-35amps that seems really high or is that normal? I mean if I cruised at less than 800ft up and set my throttle to 35amp draw I would probably go farther but I like flying up really high. Yesterday I flew into the clouds about a like up and I was at about half pack just to get up there.
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Old Nov 28, 2012, 05:07 PM
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Old Blighty
Joined Apr 2010
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Quote:
Originally Posted by flohio117 View Post
I'm using the riewing motor that the z2 comes with along with the esc that it comes with. If I just want to cruise it's pulling 30-35amps that seems really high or is that normal? I mean if I cruised at less than 800ft up and set my throttle to 35amp draw I would probably go farther but I like flying up really high. Yesterday I flew into the clouds about a like up and I was at about half pack just to get up there.
Hmm... My ZII runs off 3S, has a 1100kV motor and 10x7 prop. WOT is no more than 34A and that's when the plane is static - in flight it would be even less. WOT in flight is about 55-60MPH (at a guess)
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Old Nov 28, 2012, 09:47 PM
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Canada, AB
Joined Jun 2010
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Performance question

So this is my set up from my Skywalker which will go into my new Z2.

Motor: OMA-3820-1200
http://www.osengines.com/motors/moto...ifications.pdf

Servo: http://www.servocity.com/html/hs-645...ra_torque.html

Prop: 10x5 or 10x6 (least Amps pull on 3s setup)

ESC: http://www.e-fliterc.com/Products/De...rodID=EFLA1060

Lipo: http://www.hobbyking.com/hobbyking/s...Lipo_Pack.html

OSD: http://shop.fyetech.com/product_info...products_id=32

VTx: http://www.immersionrc.com/datasheet...05_09_2008.pdf

Antenna set up (ground & air):
http://www.truerc.net/canada/index.p...roducts_id=203

Cameras: Gopro and Securitycam2000 Sony WDR 600TVL (single board)

Lipo set up will be 2 x Lipos giving me 1.2A capacity.

Not sure what the AUW will be. Lipos alone are 333g each!

So what kinda performance can I expect if I load up the Z2 with that lot? Mainly interested in flight times.

Steve
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Old Nov 29, 2012, 10:32 AM
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United States, TN, Clarksville
Joined Dec 2011
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Quote:
Originally Posted by Ian Davidson View Post
Hmm... My ZII runs off 3S, has a 1100kV motor and 10x7 prop. WOT is no more than 34A and that's when the plane is static - in flight it would be even less. WOT in flight is about 55-60MPH (at a guess)
I'm thinking I need to calibrate my current sensor because my wot is 76A and I normally fly 5500mah out of my packs but my charger is only putting back in around 2200mah per pack so I'm really thinking my current sensor is just way off. Yesterday I dis a huge loop and I found out I can actually cruise at 12 amps and still go really far. My flight was 18 minutes but It could have been 25-30 but I cut it short because my fingers were freeeeezing. I'm still wanting to go to 4s setup I think though.
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Old Nov 29, 2012, 11:54 AM
Aerial DP
United States, CA, Lakeside
Joined Apr 2010
912 Posts
my zii has the scorpion motor, ice 75 and 10x6" prop. max amps is 68 @ 93mph, 50mph is 15-16 amps, 10 amps is around 40mph

not only the high amp readings, but the reading more mah than used is a dead giveaway to your problem
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Old Nov 30, 2012, 10:20 AM
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United States, TN, Clarksville
Joined Dec 2011
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Quote:
Originally Posted by Kloner View Post
my zii has the scorpion motor, ice 75 and 10x6" prop. max amps is 68 @ 93mph, 50mph is 15-16 amps, 10 amps is around 40mph

not only the high amp readings, but the reading more mah than used is a dead giveaway to your problem
Yeah it took me awhile to piece my problem together lmao I'm gong to run my wattmeter inline with my current sensor and see what my OSD says I'm using and what my watt meter on amp setting says. My guess is there way way off lmao
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Old Nov 30, 2012, 09:40 PM
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Joined Jan 2006
280 Posts
Recent flight. Christchurch, New Zealand.

Zephyr II FPV Flight over Chch East (10 min 52 sec)
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