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Gyro Hobbies . E-flite . Next D

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e-JR Voyager E > Help setting up QJ 15 head
 
 
Zod
Heliman
Location:

I ordered the QJ-15 kit from Harold at helicopter hobbies and am totally impressed by the quality of the setup. Even though the instructions are in Japanese I was still able to do a satisfactory job of getting it together - that's how straightforward and easy to assemble the kit is.

That said, when I turn the rotor head by hand the tail spins in the wrong direction. Am wondering if anyone out there knows how to fix this... looking at some of the rotor head pics posted by members, it seems I have set that part up properly. Is it as simple as twisting the tail belt in the other direction? I think I am overlooking something really basic so I wanted to check with the gurus before I start tinkering...

Thanks in advance,

Loren
03-11-2006 Over year old.
 
 
Chem Geek
Senior Heliman
Location: Sarasota, FL

Yes you could just twist the belt once and that would do it. What you should look at, is the new head spinning in the same direction as the original head? If it is, you just have your belt twisted too much is all.
03-11-2006 Over year old.
 
 
Zod
Heliman
Location:

Thanks for the advice - tail is spinning in the correct direction now. However, it doesn't seem to be spinning fast enough - I can't get the heli to rotate right (clockwise). The rudder is working perfectly, but it seems like the belt isn't moving fast enough. Turning the nose to the left is no problem at all, but I can barely keep it in place at low rotor speeds, and as it spools up the heli starts to spin counter-clockwise. Any ideas?
03-11-2006 Over year old.
 
 
oldboldpilot
Key Veteran
Location: Southern California

Does the belt have a full twist in it?

Helis are Man's Defiance of the Laws of Nature - OCHC
03-12-2006 Over year old.
 
 
tean
Senior Heliman
Location: Gloucestershire,UK

When you turn the rotorhead forwards (clockwise), because of the auto unit, the tail shouldn't turn at all. When you turn the rotorhead backwards (anticlockwise) the tail will turn, but it will also go backwards.

Is this the cause of your confusion here Zod?

Logo14 Vbar, Logo500 CSM flybarless, Trex 600 CSM flybarless, 3DMP, Logo10, Lipoly, Mini T, .......
03-12-2006 Over year old.
 
 
Zod
Heliman
Location:

Tean, the helicopter behaves the way it should when I turn the rotor head by hand. The tail just doesn't seem to have enough thrust to hold the nose in place.
03-13-2006 Over year old.
 
 
Ralphw
Key Veteran
Location: Spring, TX

Have you checked the pulley on the T/R shaft to be sure it is locked down securely? If it's not, the T/R may not be reaching full speed under load. Verify that the teeth on the belt are turned to the inside so they mesh with the teeth on the pulleys. Also check the belt tension...if too loose you could be seeing slippage with the same result. In general the stock T/R on the VE has plenty of power and works well even with the stretch and 470mm blades.

Ralph W.
"Life's Short, Fly Fast"
03-13-2006 Over year old.
HOMEPAGE  
 
 
Zod
Heliman
Location:

The gear on the tail shaft seems to be attached securely... I have checked to make sure that there is no slippage. The tension seems OK - if I push firmly I can get both sides of the belt to come in contact. Is there any chance this could be related to my gyro? The gyro (a JR 460t) is operating in the right direction, but I have tail lock switched off until I figure out what's going wrong. I am tempted just to flip the tail lock switch and try to solve it that way, but it really seems like a mechanical issue. While I was spinning up the chopped at lower RPM, I noticed that the belt seemed to moving too slo, there was a yello mark on the belt that seemed to make a full revolution every couple seconds, which seemed like a long transit time...

Thanks for all of the help on this guys, it is much appreciated!
03-13-2006 Over year old.
 
 
Zod
Heliman
Location:

This problem continues to have me befuddled! I disconnected the gyro and locked the tail blades at full pitch, which should be moving me clockwise, but still the heli wants to spin counterclockwise. This tells me that it isn't the gyro. The belt is tight so that I can't turn the tail blades by hand, and the tail hub and tail belt gears on both ends are locked and working properly as well.

Could I be having a problem caused by the addition of the Q15 head? something to do with the pitch of the blades being wrong? I still haven't tinkered with the pitch curves as I am still trying to figure out how to get this crazy tail problem sorted out.
03-13-2006 Over year old.
 
 
Ralphw
Key Veteran
Location: Spring, TX

I've run the Quick head for over two years and there should be nothing there that causes the T/R any problems. It sounds lke you have something setup wrong in the radio. My first guess would be the ATV value set too low. On all my helis I use an ATV value on the rudder channel of 150% then make my gain adjustments to the channel assigned for that purpose. For the limits, I use the limit pot on the gyro itself after making sure my mechanics are correct. I use Futaba gyros for all my fleet but the concept should be similar with the JR gyro. Check the VE manual for more data on the gyro setup with a JR unit.

Ralph W.
"Life's Short, Fly Fast"
03-13-2006 Over year old.
HOMEPAGE  
 
 
melvonnar
Heliman
Location: Clearwater Flordia

do this with the training gear on the heli-----turn the gain all the way down on the gyro. put the heli on a smooth flat service; I use my driveway. bring the heli up in speed slowly; then you can check if right is right and left is left on your stick; just get the heli light enough to check this; don't even think of trying to hover.
If this is correct you can then turn up the gain in the heli; I usually start at about half way. then If the heli spins most likely the gyro is backward.
03-13-2006 Over year old.
 
 
Zod
Heliman
Location:

Guys, thanks again for all your help on this. I think I may have found the problem - the pitch on the blades is way too high. It was about 9 degrees at low stick and off the chart at hover stick. Must have really over-torqued the heli, causing thedreaded spins.

Have started tweaking the control rods, which is pretty methodical stuff given the Q15 head. Hoping to have a flight report tomorrow after work. Thanks agin folks.
03-14-2006 Over year old.
 
 
Stack
Veteran
Location: Bethlehem, PA

I found the QJ15 head to be the same ... methodical. I couldn't think of a better word for it! Once dialed in though, a world of difference.

I was about to get rid of my VE but now it flies nicely for my style.

You will be impressed!!
03-14-2006 Over year old.
 
 
Zod
Heliman
Location:

Stack! I thought you sold your Q15 head? I was going thru every old Q15 thread I could possible find in my quest for an answer, and it looked as though you had thrown in the towel. I am glad to find out that you did not.

Definitely looking forward to joining the happy world of Q15-upgraded VEs. I will give you a guys a shout with any other problems I run into - thanks for all the help and attention!

Cheers,

Loren
03-15-2006 Over year old.
 
 
Stack
Veteran
Location: Bethlehem, PA

I almost did but A) I knew the guys on this forum knew what they were talking about B) I just can't give up on things..

So, after taking a short break (sometimes it is best to walk away for a day or two), I went back at it with a clear head. I will be the first to admit that I was not approaching setup with a clear head. Something had my brain all backed up! Once I sat down with it again it was a piece of cake.

Much to my surprise it flew VERY well on the first flight. A couple of minor adjustments and I couldn't be happier. My VE has a special place in my heart, still not sure why, but it went from my pain in the a** heli to one that I really enjoy toying with now. Out of the 11 that I own, it is one of my faves. Thanks to the 15 head.

Anyway... keep at it! It will pay off!
03-15-2006 Over year old.
 
 
oldboldpilot
Key Veteran
Location: Southern California

Jusr curious - why is a VE with Q-15 head better than a Q-15 with a Q-15 head? Is the VE bigger?

Helis are Man's Defiance of the Laws of Nature - OCHC
03-15-2006 Over year old.
 
 
Ralphw
Key Veteran
Location: Spring, TX

The Quick 15 was a nitro design and built like a tank so it weighed a ton. The Q15/18 was physically a little larger than the VE. The head is a nice design and much more responsive than the stock VE head.

Ralph W.
"Life's Short, Fly Fast"
03-16-2006 Over year old.
HOMEPAGE  
 
 
dwoel
Heliman
Location: Millville, New Jersey

I'm seriously considering the Q-15 head for my VE (Harold has some more coming from Japan). Is the improvement as good as I've heard? Does it justify the cost? My big problems are consistancy. It seems as though things are different each time I fly (Tracking, Sensistivity, etc. It seems as though everyone is happy, but I was just curious as to what the biggest, noticable difference is. This would be going on a stretched VE. What is the spacing on the main grips? I'll probably need to make spacers. The MS 470 Carbon blades have a root of 9 MM. So guys, should I go for it?
03-16-2006 Over year old.
 
 
Zod
Heliman
Location:

Success! The VE with Q15 head flies better than ever, and the tail is behaving exactly as it should. Thanks everyone for your help on this challenging re-fit.

My next step is using a lipo battery from xushobby (forget the voltage at the moment). Last time I tried one of these the RPM was so high it shook the stock plastic voyager head apart. Can anyone recommend a good pitch/throttle curve to use with a high-voltage lipo setup?
03-19-2006 Over year old.
 
 
dwoel
Heliman
Location: Millville, New Jersey

Congratulations Zod !!! I'm glad to see things work out so well for you. Your success, and the comments of others has convinced me to make the move to the Quick head. Placed my order, and I hope to receive one soon. Thanks again and congratulations
03-19-2006 Over year old.
 
 
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e-JR Voyager E > Help setting up QJ 15 head
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