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Old Jan 21, 2008, 06:40 PM
Uh Oh Jungo
ParkJeff's Avatar
Australia, WA, Perth
Joined Feb 2003
772 Posts
Herb,

Thanks for the pics. Your build and finish quality is excellent as always. Love the retracts.

Quote:
Originally Posted by Herb
I had to carve out the canopy floor to make everything, incl the 6s pack, fit. The canard servo is kind of in the way too.
I'm a little worried about the canard servo/linkage as it looks like the battery will be sitting on top of it (?). Did you have to add tail weight to get the required CG with the pack you're using?

Jeff
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Old Jan 21, 2008, 10:36 PM
Registered User
Taipei, Taiwan
Joined Oct 2005
4,677 Posts
Hi Friends,

My colleagues did not apply mixer function on the canards, they said they have to apply both elevator and canards when taking off and climbing up.

Hi Herb & Latinfliers,

Have nice flights with your great fighters !

Chen
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Old Jan 22, 2008, 12:48 AM
Uh Oh Jungo
ParkJeff's Avatar
Australia, WA, Perth
Joined Feb 2003
772 Posts
Hi Latinflyer,

Your J-10 looks good. Glad you got to fly it successfully after correct trimming.

Quote:
Originally Posted by latinflyer
3- Bad maiden, crash three time trying to figure out how to operate and take full control of canards.
Could you elaborate on the problems with the canards? Did they make pitch control too sensitive?

Jeff
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Old Jan 22, 2008, 03:31 AM
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kensp's Avatar
Darwin Australia
Joined May 2002
6,960 Posts
Quote:
Originally Posted by Josiah
Guys, I have a question I hope you can help me with.

I have never had a delta before, and I am curious about something. Can this plane operate with the ailerons doing ONLY aileron duty, and the canards doing the elevator job? In the manual they have a mixer and a Y-harness so that the ailerons can do elevator duty as well.....is this a MUST?....if so why? will the canards not provide enough lift?

Thanks for any responses..
The manual shows two set ups for the Canards.

The first set up is for pitch control only on the canards and uses one servo driving a shaft that goes through the fuselage to join the canards.

The second set up is for both pitch and roll control on the canards and uses two servos with the canards mounted directly on the output arms.

Both systems have aileron control on the delta wing.

I plan to use the first set up to reduce complexity.

Ken
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Old Jan 22, 2008, 03:39 AM
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Joined Jul 2006
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Hi Kensp,

I have three options according to the manual

EDF
Pusher
and mixer on canards only.

I assume you are referring to the top EDF one? I see there is still a mixer and a Y-harness with reversing func. I think we are going to have to use it. I was wanting to simplify things as well, but a few posts above it is mentioned that there is not enough lift with only the canards doing pitch duty.
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Old Jan 22, 2008, 03:44 AM
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kensp's Avatar
Darwin Australia
Joined May 2002
6,960 Posts
Quote:
Originally Posted by THREEWING
Chewy , you might have to program the ESC with your transmitter, for your high and low throttle firist.
I also purchased a Tower Pro 70 Amp ESC only to find that it is fo 4-6 cells only so the lowest LVCO is 12 Volts. I currently have a TURNIGY Plush 60 Amp ESC In the mail and expect it to arrive this Friday.

Ken
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Old Jan 22, 2008, 03:47 AM
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Taipei, Taiwan
Joined Oct 2005
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Quote:
Originally Posted by Josiah
Guys, I have a question I hope you can help me with.

I have never had a delta before, and I am curious about something. Can this plane operate with the ailerons doing ONLY aileron duty, and the canards doing the elevator job? In the manual they have a mixer and a Y-harness so that the ailerons can do elevator duty as well.....is this a MUST?....if so why? will the canards not provide enough lift?

Thanks for any responses..
The canards did not provide the prototyped J-10 with enough lift according to my colleagues at GWS Taiwan, while the prototyped one was powered by the old motor. They applied elevon as elevator and the canards for climbing up and taking off.

Chen
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Old Jan 22, 2008, 04:07 AM
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Joined Jul 2006
15 Posts
Hi CHEN,

Can you give me the part number of the mixer required, and the Y-harness as well, I think I found the harness number on GWS web, but I cannot find the mixer....

Thanks
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Old Jan 22, 2008, 04:07 AM
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Darwin Australia
Joined May 2002
6,960 Posts
Quote:
Originally Posted by Josiah
Hi Kensp,

I have three options according to the manual

EDF
Pusher
and mixer on canards only.

I assume you are referring to the top EDF one? I see there is still a mixer and a Y-harness with reversing func. I think we are going to have to use it. I was wanting to simplify things as well, but a few posts above it is mentioned that there is not enough lift with only the canards doing pitch duty.
Page 5 of the manual shows the use of one servo and a cross fuselage joining rod.

"2.Front Wing assembly.

Item 48 E8 front Stabilizer controlling arm
Item 21 Fiberglass Rod for the cross shaft
Item 56 E1 Shaft Bushing
Item 57 E10 front stabilizer Shaft Bushing Mount
Item 58 E 8 front Stabilizer Mount base"
All of these parts are supplied in my kit

Page 6 shows the use of two GWS Naro Pro servos.

Ken
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Old Jan 22, 2008, 04:12 AM
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Joined Jul 2006
15 Posts
Ken,

Study the wiring diagrams on page 8, you will see what I am talking about. Even with one servo on the canards you still need to mix...

regards
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Old Jan 22, 2008, 04:14 AM
Registered User
Ipoh, Perak Malaysia
Joined Jul 2006
4,005 Posts
I am going to make the canards as both ailerons and elevators, and also use elevons. I I may even program flapperons which will activate the canards in a reverse movement so that the plane doesn't dive when flapperons are activated. will have to make this mixes switchable, and try them out way high, just in case.

I just had a technician replace the nose gear servo with another different model metal geared servo from UH. Hope this works better and doesn't quit on me before the plane even maidens, and especially not during flight!

chewy
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Old Jan 22, 2008, 04:20 AM
Registered User
Ipoh, Perak Malaysia
Joined Jul 2006
4,005 Posts
BTW, if you wish to use servos to directly drive the canards, make sure you get the Naro Pro. I bought a pair of Futaba and found that even though the size is correct, the teeth won't fit into the canard teeth/fittings. All the other servos are naro std except for the nose steering which is metal geared UH model. I forgot which particular model as these don't come with any labels.

chewy
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Old Jan 22, 2008, 05:20 AM
Registered User
Taipei, Taiwan
Joined Oct 2005
4,677 Posts
Quote:
Originally Posted by Josiah
Hi CHEN,

Can you give me the part number of the mixer required, and the Y-harness as well, I think I found the harness number on GWS web, but I cannot find the mixer....

Thanks
Hi Josiah,

The Y harness is "WE22/JR/30" or "WE22/FP/30" for W22 size, or "WY/JR/30" or "WY/FP/30" for W26 size. W22 is thicker one. JR and FP are for plug type.
The mixer is "GW/V-TAILN". Be reminded that you could not apply Ch 1 and Ch 2 on this Mixer with Futaba PCM transmitter, you have to use Ch 1 and Ch 3 instead in this case. It's totally okay if your Tx is PPM one or JR PCM one.

Chen
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Old Jan 22, 2008, 06:09 AM
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Darwin Australia
Joined May 2002
6,960 Posts
Quote:
Originally Posted by Josiah
Ken,

Study the wiring diagrams on page 8, you will see what I am talking about. Even with one servo on the canards you still need to mix...

regards
On Page 11 we have "8. R/C system & wiring"

The first section of this is for "EDF power system". With this system the canard only operates in pitch using only one servo.

The second is for "Pusher version power system" . Again with the canards operating only in pitch using one servo.

The third "For using mixing/delta function on the front stabilizers only" is used for canards that operate in both pitch and roll mode using two servos.

I have a JR PCM 10X transmitter that allows for either + or - mixing plus servo reversing on all 10 channels.

I will use the set up with the canards operating in pitch mode only. The in Tx mixing that I will need to use will be the same as the flap elevator mixing plus flaperons used on my Formosa II except the flap/elevator mixing will be in the opposite direction. This mixing can be switched on and off as required. On the delta wing I will then have elevons and the canard will provide extra up or down force at the nose but no roll force.

My Club has a 200 x 10-meter hot mix strip that was designed to allow operation of gas turbine powered models so I will have a lot of room to accelerate to a high speed before TO. The reports that the canards alone are not enough to lift the nose on TO indicates that the CG may be too far forward.

Ken
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Last edited by kensp; Jan 22, 2008 at 06:42 AM.
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Old Jan 22, 2008, 10:24 AM
latinflyer
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United States, CA, Milpitas
Joined Dec 2004
747 Posts
Quote:
Originally Posted by ParkJeff
Hi Latinflyer,

Your J-10 looks good. Glad you got to fly it successfully after correct trimming.

Could you elaborate on the problems with the canards? Did they make pitch control too sensitive?

Jeff

Hello,
Yes, on the first launching it went up and then start pitch back and forth so I decide to bring it down and land (crash), once not used as elevators but mix with the delta setup they work fine. Lift is enough, just make sure u use expo and dual rates; using DX7 I use +50 on expo and 50% dual rates if u don't use any at all it will go crazy on u. Let me know if u need more inside info.
I flew it yesterday again and it is pretty stable and it fly's so great.

Latinflyer.
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