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Old Sep 25, 2012, 10:51 PM
ICrashRCs
United States, TN, Memphis
Joined Jun 2011
1,196 Posts
This new Delta model has been up on NitroPlanes for a while with no pictures.
Pictures showed up today.
How bout dat!

AeroSky Delta 4 Channel EDF Jet ARF Wingspan 510mm
http://www.nitroplanes.com/05a71-delta-epo-arf.html
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Last edited by IFlyRCs; Sep 25, 2012 at 11:06 PM.
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Old Sep 25, 2012, 11:00 PM
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alpea 41's Avatar
United States, CA, Chino
Joined Oct 2007
10,769 Posts
That looks like a perfect copy.
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Old Sep 25, 2012, 11:01 PM
ICrashRCs
United States, TN, Memphis
Joined Jun 2011
1,196 Posts
I have to assume it's the same plane.
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Old Sep 26, 2012, 01:14 AM
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gooniac33's Avatar
Sunnyvale
Joined Feb 2009
5,187 Posts
Quote:
Originally Posted by IFlyRCs View Post
This new Delta model has been up on NitroPlanes for a while with no pictures.
Pictures showed up today.
How bout dat!

AeroSky Delta 4 Channel EDF Jet ARF Wingspan 510mm
http://www.nitroplanes.com/05a71-delta-epo-arf.html
sweet!!! gotta get one of them!!!
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Old Sep 26, 2012, 04:07 AM
ICrashRCs
United States, TN, Memphis
Joined Jun 2011
1,196 Posts
It was $85 shipped using code pricepickle for 6% off.

Now we can see if it has the same components.
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Old Sep 26, 2012, 01:38 PM
Registered User
Salinas, CA
Joined Dec 2007
485 Posts
Quote:
Originally Posted by IFlyRCs View Post
It was $85 shipped using code pricepickle for 6% off.

Now we can see if it has the same components.
Damn it... I just bought a Dynam Devil 3D biplane from Nitro and used "nitro5" and got 5% I should have used pricepickle and got an additional 1% (that's like a dollar!!)...
I'm calling them today and spend a few hours on the phone to get my 1% -- LOL
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Old Sep 26, 2012, 05:53 PM
chuck
santa barbara, CA
Joined May 2009
4,336 Posts
in 1 of the 2 threads there was a discussion re. thrust #'s w/ the stock motor and 5 blade fan on 4's . i am using that setup in my amx and i said i would report my findings, so here they are;

i clearanced the rotor and balanced it both static and dynamic. w/ a fully charged 4cell and a 20 sec run, it settled out to 430 grams thrust.
it looks like the amx will be< 400 grams auw w/ the 4cell 1000 i hope to use if i can get balance and fit . my guess is the eflux speed should be higher than w/ the 6 blade, so it might scoot pretty well.

chuck.
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Old Sep 27, 2012, 08:53 AM
we can take off without that
green_flyer's Avatar
London, UK
Joined Nov 2008
901 Posts
Interesting. I have similar numbers but a bit lower. Lots of different factors, different airframe (F22), lower capacity lipos 850mah, not quite fresh.
I got 375g peak dropping to 350g after 12 sec.
Peak thrust was at 20.91A x 13.69V = 286W

JPower F22 stock fan on 4s static test (0 min 51 sec)


I have the 6-blade JPower clone fan in a couple of other set ups, but I tried it head-to-head against the stock 5-blade rotor using the 4600kv 40g HK alloy fan inrunner (in the stock plastic JPower housing), and all it did was draw more amps. Thats why I have taken it off my Neutron 4900kv set up, it was drawing 19A peak, but the thrust quickly dropped from 315g to 280g after only 8 seconds. This was with the weaker 25C Hyperions thought. I'm currently cutting down the HK-alloy's 5-blade rotor to fit 50mm, that rotor sounds smooth and draws less amps. Shame they dont sell the adapter for it separately.

4600kv inrunner from alloy 53mm fan on 3s 850mah 25C Hyperions

Fan----Initial_peak---After_20s----Peak_Amps---Volts----Watts
5-bld---288g---------252g-----------16.34------------10.77---175
6-bld---286g---------234g-----------16.86------------10.45---176

However I'm not saying dont use it, its stronger than the stock rotor so I will carry on using it in other set ups to avoid blades falling off the stock rotor. Just it seems its not the most efficient rotor.

F22 4600kv stock rotor 5 blade 50mm (0 min 56 sec)


F22 4600kv 6-blade 50mm rotor (0 min 45 sec)
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Old Sep 27, 2012, 10:49 AM
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Joe 1320's Avatar
United States, FL, Sebring
Joined Feb 2006
7,498 Posts
Great testing info guys, I will be testing a 3 blade rotor to check the results. That should drop the amp draw plus show an increase in efflux speed due to a lower rotating mass and resistance on the motor.
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Old Sep 27, 2012, 11:17 AM
chuck
santa barbara, CA
Joined May 2009
4,336 Posts
good info, after i posted i realized i had not noted that my test was in the amx airframe w/ the stock thrust tube at 39 mm. as noted this smaller exit diam will change test results over other airframes.

i found the 5 vs 6 blade test interesting, was that also in the f22?

i have the f22 w/ the stock housing and the 6 blade that i run on 3's w/ the stock motor. i felt that the 6 blade would push more cfm for the draggy f22 airframe but now i am not sure. i was able to get it balanced and much quieter than the 5 blade, but that could be due to less rpm also. i will test thrust on my 22 and see what i get.

chuck.
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Old Sep 27, 2012, 02:02 PM
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alpea 41's Avatar
United States, CA, Chino
Joined Oct 2007
10,769 Posts
Someone talked about thrust vectoring the F-22 a while back . I was searching You tube today and found this video of it.
T V set up on F 22 (0 min 28 sec)
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Old Sep 27, 2012, 03:18 PM
we can take off without that
green_flyer's Avatar
London, UK
Joined Nov 2008
901 Posts
Quote:
Originally Posted by chas650r View Post
i found the 5 vs 6 blade test interesting, was that also in the f22?
Yes both tests were on the F22 airframe on the same day, one in the morning one in the evening with 850mah hyperion 25C fully charged before each test.

I guess there are too many variables to make a definite conclusion. Maybe I should have done the test with the stock Jpower outrunner. The inrunner I used may be at its limit with the 5-blade anyway so pehaps cant spin the 6-blade any faster, where as the outrunner with its lower kv may cope with the 6-blade better.
F22 airframe may reduce thrust because it splits it after the fan into two nozzles?

Nice thrust vectoring by the way. I want to do something similar on my F22 as well
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Old Sep 27, 2012, 05:30 PM
chuck
santa barbara, CA
Joined May 2009
4,336 Posts
41, that was me re the tv f22, thanks!

chuck.
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Old Sep 27, 2012, 06:53 PM
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Cheese5's Avatar
United States, CA
Joined Jul 2010
4,383 Posts
Quote:
Originally Posted by chas650r View Post
good info, after i posted i realized i had not noted that my test was in the amx airframe w/ the stock thrust tube at 39 mm. as noted this smaller exit diam will change test results over other airframes.

i found the 5 vs 6 blade test interesting, was that also in the f22?

i have the f22 w/ the stock housing and the 6 blade that i run on 3's w/ the stock motor. i felt that the 6 blade would push more cfm for the draggy f22 airframe but now i am not sure. i was able to get it balanced and much quieter than the 5 blade, but that could be due to less rpm also. i will test thrust on my 22 and see what i get.

chuck.
My F-22 with 6 blade stock motor has about a 0.9:1 T/W with a 4S 1000mah. The F-22 weighs 438g (quite heavy!,) and pivots almost to vertical while holding it at the center of gravity.

With the 5 blade on 4S I was constantly near full throttle to fly circuits around the field. With the 6 blade, most of the flying is done at 60% throttle with full throttle for vertical runs and loops. Flight performance with 3S has similar results as with 4S. 5 blade too full throttle to keep it flying, while with 6 blades it had some extra power.
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Old Sep 27, 2012, 08:07 PM
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alpea 41's Avatar
United States, CA, Chino
Joined Oct 2007
10,769 Posts
To me the F-22 seemed to be the most draggy of the 6 or 7 planes I've seen fly . But the new version 2 seemed a little quicker on 3 cells.
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