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HomeRC & PowerAircraftHelicopterFlybarless Rotor Head SystemsOther › Almost lost my trex 500, MiniV, help please!
01-11-2010 10:04 PM  8 years agoPost 1
jamesef91

rrNovice

cheyenne, wy-usa

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Have been flying my T Rex 500 with mini v for a while and finally getting it dialed in. Today I suddenly got glitches on all axes. After landing checked security of all electronic connections and gyro mount. My Trex still has belt drive tail, I'm wondering if that could be the problem. Any help would be apreciated.

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01-12-2010 07:31 AM  8 years agoPost 2
MrMel

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Gotland

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Have you grounded the boom?

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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01-12-2010 02:51 PM  8 years agoPost 3
jamesef91

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cheyenne, wy-usa

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Have you grounded the boom?
No I havent. I didn't think of that.
I picked up a shaft drive tail yesterday. I was just waiting until I figured the fbls thing out as the belt drive was cheaper to fix. Anyway I'll probably install that before I try again. Do yo see any need to ground a shaft drive booom?

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01-12-2010 02:55 PM  8 years agoPost 4
MrMel

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Gotland

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No, it shouldnt be needed to ground when running Torque Tube.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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01-12-2010 09:49 PM  8 years agoPost 5
jamesef91

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cheyenne, wy-usa

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No, it shouldnt be needed to ground when running Torque Tube.
Just wanted to say thanx for the help.

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01-14-2010 09:50 PM  8 years agoPost 6
Jeff polisena

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westpalmbeachflorida usa

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FYI check all connections if one is loose it will cause an issue .I also had a circuit board go bad (signal wire) if you vibrated it servos would go crazy

I stole it ,flew it and gave it back ;)

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01-14-2010 10:16 PM  8 years agoPost 7
cwright

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Blossvale New York

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Please let us know how you like the 500 with the mini v. I want to build a 500 this winter with the mini v. When I had my first 500 I put the torque tube in because of the potential static issue. As Mr Mel stated no need to ground the boom with the torque tube. Chuck

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01-14-2010 10:38 PM  8 years agoPost 8
Jeff polisena

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westpalmbeachflorida usa

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I have both mini in one 500 and new full size in second . I like the rx less new version for the fact of separate sensor . I feel that connections on mini unit can give some interference in flight both do fly great took a bit more finesse on mini.

I stole it ,flew it and gave it back ;)

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01-15-2010 12:29 AM  8 years agoPost 9
Justin Stuart (RIP)

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Plano, Texas

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I don't know whey even still sell belt drives. Whether it is static, or losing teeth, stretching, or needing to be retensioned--the torque tube is so much better.

Jamesef91, Can you please tell us what ESC you are using?

Avant RC
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Thunder Power RC
Kontronik Drives

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01-19-2010 03:36 AM  8 years agoPost 10
jamesef91

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cheyenne, wy-usa

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Jamesef91, Can you please tell us what ESC you are using?
ESC is a Phoenix ice light 75. I have installed the new tail, and played with all connections but have not been able to duplicate the problem. Barring more poor weather I hope to have a chance to fly this weekend. Thanx again

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01-19-2010 03:41 AM  8 years agoPost 11
drdot

rrElite Veteran

So. California, Orange County.

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fwiw..

Lube the belt with silicone...Amazing the difference it can make....

John.

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01-19-2010 08:24 AM  8 years agoPost 12
Bob Wales (RIP)

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Lebanon CT

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I just installed my first mini vbar on my trex500 and flew it yesterday.
I got a full flight in and felt solid but was drifting to the right on the setting in the software for the trex500 .

Some adjustments will have to be made in the file.
Was hoping to have no issues as I spent hours with a friend of mine setting this up with swash leveler ,calipers etc.

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01-19-2010 07:28 PM  8 years agoPost 13
Stolla

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Port elizabeth South Africa

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You shouldn'e have to change the file settings if you have drift, ive done 2 rex 500's for my friends and the file is close to perfect except we had to adress some ballooning issues in fff on the one with mik head, on the std head mod it worked out perfect.
Drift can be caused by many factors, i.e vibration,etc, i would look elsewhere than the file.
Have you done a trimflight, keep in mind a bad trim flight can be worse than no-one. I actually followed mr mels recipe in not doing trim flights anymore but set the heli up perfect, level swash etc.

Common sense may not be common after all

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01-19-2010 07:32 PM  8 years agoPost 14
Justin Stuart (RIP)

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Plano, Texas

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A bad trim flight can certainly be worse than no trim flight at all, but you have to have the heli perfectly balanced front-to-back if you are going to go without a trim flight and have level piros.

Is there some way to manually set the trim values in the newer software? I'm still running 4.0.18.

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01-20-2010 02:34 AM  8 years agoPost 15
Bob Wales (RIP)

rrKey Veteran

Lebanon CT

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I have done a trim flight and this is when I felt it was drifting to the right on me. I let it move right as I wanted the trim flight complete. When finished the trim light was full green. I have not flown it since though just wanted to know if this is common. This is my first vbar.

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01-20-2010 02:36 AM  8 years agoPost 16
MrMel

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Gotland

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Drifting during Trim is normal, its how it learns

"Kick it in one direction, see how fast the user has to react" type of learning.

Gone fishing..or hunting..or something
My site: http://heli.dacsa.net - VBar videos and more

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01-20-2010 03:38 AM  8 years agoPost 17
Stolla

rrKey Veteran

Port elizabeth South Africa

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The green light is not necessary an indication of a good trim flight that's why it's removed on the latest software.
And yes the heli will drift in autotrim you have to let it drift for a while and then correct the drift with minimal inputs. Please check the videos again.

But chances are good that it'll fly well anyway so try it out. You can always redo the trimflight later

Common sense may not be common after all

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01-20-2010 06:05 AM  8 years agoPost 18
Justin Stuart (RIP)

rrMaster

Plano, Texas

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It's easy to tell if the trim flight was good. Do some piros. If it stays in one place, then it was good.

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01-20-2010 08:20 AM  8 years agoPost 19
Bob Wales (RIP)

rrKey Veteran

Lebanon CT

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Drifting during Trim is normal, its how it learns

"Kick it in one direction, see how fast the user has to react" type of learning.
Mr MEl I did let it drift but it seemed to drift in one direction not seeming to me to be correcting itself as I was under the impression that it would drift in circles pretty much learning its trim.I let it drift off as far as I felt comfortable with.
I am using the RJX head and we went over it very carefully making sure the swash was perfectly level with a swash leveler and the links were measured with digital calipers to be exactly the same.

I have full green on the trim meter light when taking it out of trim mode what should I expect for hovering and flight characteristics?

How do I know if I should do another trim flight?

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01-20-2010 08:28 AM  8 years agoPost 20
Bob Wales (RIP)

rrKey Veteran

Lebanon CT

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Stollla
The green light is not necessary an indication of a good trim flight that's why it's removed on the latest software.
And yes the heli will drift in autotrim you have to let it drift for a while and then correct the drift with minimal inputs. Please check the videos again.
Being that this is new I was under the impression that I would have had the latest firmware uploaded as it was completed this past week.
I did let the heli drift away from me as it was 100 to 150 yards away from me to the right before I had given any inputs and very small at that just to get it coming back.
I have watched all of the videos and did not seee it drifting as mine was.
Maybe I will just have to wait for another no wind day to try this trim flight all over again.
I have not flown it again as I want to make sure everything is done properly for this setup.

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HomeRC & PowerAircraftHelicopterFlybarless Rotor Head SystemsOther › Almost lost my trex 500, MiniV, help please!
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