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HomeAircraftHelicopterAlignOther › Sluggish nitro sport
03-08-2008 01:11 PM  10 years agoPost 1
Helijockey

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150 miles from somewhere

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On my trex I have an OS hyper with hatori 522, hitec 6975's on swash and 6965 on throttle, GV1 and radix 600 main and 95mm tail blades. I'm also running 2000 and 1950 HS in idleup and am using 25% nitro fuel and running +/-12 pitch. The problem is the heli in idleup lifts off as if it's a 30 size heli I've used a tach to check the GV1 and it's fine, the needle is open about 3 clicks less than 1.5 turns and I can keep my finger on the backplate for about 5 seconds. During stuff like hurricanes, tic tocs and rainbows etc the engine works fine but I just can't do any flips when I lift off. Because it just doesn't seem like the heli will pull it off. It's a great flying heli but I'm just wondering what I'm doing wrong

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03-08-2008 01:33 PM  10 years agoPost 2
S76 Mech

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Hatboro, Pa.

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Sounds like you have a good handle on the setup. What are the outside temps around where you live? I have found that running my Hyper slightly richer than normal, say 1.75 open in the winter months helps alot. Fuel comsumptions are increased and flight times are decreased but the power kicks butt.

Gaui Greatness X7, X5, NX4, X3

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03-08-2008 01:36 PM  10 years agoPost 3
inkspot1967

rrProfessor

Cranston Ri

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how much cyclics are you running if your using alot of cyclics it will bog down also

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03-08-2008 01:39 PM  10 years agoPost 4
S76 Mech

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Hatboro, Pa.

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One more thing I have noticed. I have a TJ Pro installed, calibrated, and set for 2150rpms. I have run this same governor in alot of heli's with success. But, when I installed it in my 600N, even at 2150 it seemed smooth but very sluggish. Just for kicks, I turned it off and ran the heli on my curves. Whoa, what a difference! You really have to dial in your curves to eliminate overspeeding, but I can really tell the difference with the snappyness of the heli.

So, just for the hell of it, try turning off your gov and running on your curves, see if that makes a difference in your case. Just watch that overspeeding until you dial the curves in!

Just a thought!

Gaui Greatness X7, X5, NX4, X3

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03-08-2008 01:57 PM  10 years agoPost 5
Helijockey

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150 miles from somewhere

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Guys the temp here is 26c and I'm running 8 degrees cyclic, I'll also turn off the GV1 tomorrow and see how it goes. S76 mech ur not using the governor anymore now?

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03-08-2008 02:00 PM  10 years agoPost 6
REGULATER

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Bakersfeild, CA

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Hey Mech, I had a buddy try the same thing this week and had the same exact result's.He shut off his TJ Pro and played with throttle curves on his YS and he said it made a big different's the Heli didn't bogg as much and ran stronger,Were going to work on mine today if the wind doesen't blow.

REGULATER

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03-08-2008 02:02 PM  10 years agoPost 7
S76 Mech

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Hatboro, Pa.

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umm 26c, what is that again in F? LoL, no, I am not running the governor. Its still on and attached, but I haven't had it running in about 50 flights or so, its been INH for about 6 mths.

Gaui Greatness X7, X5, NX4, X3

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03-08-2008 02:06 PM  10 years agoPost 8
S76 Mech

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Hatboro, Pa.

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Ok, got the conversion, so its around 80degF, thats pretty warm. Forget what I said about going richer. 5 seconds on the backplate with that outside air temp sounds about right.

I cheated
http://www.onlineconversion.com/temperature.htm

Gaui Greatness X7, X5, NX4, X3

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03-08-2008 02:12 PM  10 years agoPost 9
S76 Mech

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Hatboro, Pa.

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REGULATER
Yup, I'm no Pro heli flyer or anything, but I know what works on my helis and what doesn't. For some reason on all my other helis the TJ Pro worked just fine. On the Rex, it really seemed to inhibit its performance. The key is to fine tune the curves. Drop down from a high altitude to a low altitude to try and get it to over-rev. Then adjust your mid (V) curves to eliminate that overspeeding.
I'm running a DX7 so it only has 5 point curves and I have it flying pretty good. With a higher-end tx with 7 point curves you can really tweak it nicely.

Gaui Greatness X7, X5, NX4, X3

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03-08-2008 02:31 PM  10 years agoPost 10
Helijockey

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150 miles from somewhere

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Thanks S76 Mech I'm looking forward to flying tomorrow now

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03-08-2008 02:32 PM  10 years agoPost 11
S76 Mech

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Hatboro, Pa.

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Don't thank me yet LoL Hope it goes well.

Gaui Greatness X7, X5, NX4, X3

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03-08-2008 02:36 PM  10 years agoPost 12
REGULATER

rrApprentice

Bakersfeild, CA

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Mech, you are right ,It is exactly what you said . once he set the throttle curves with the TJ off he could tell immediately.Im glad you made the post about this , My buddy was never 100% happy with his Trex 600 with the YS , But he is happier now. He also put together a sport with an OS Hyper and say's the OS is much more consistent. The YS took a lot more work to make it right. Maybe this thread will help other's with there set up.

REGULATER

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03-08-2008 02:45 PM  10 years agoPost 13
S76 Mech

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Hatboro, Pa.

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Cool, but HeliJockey might have something else going on with his setup that might be making it sluggish, hope it works out, but if it doesn't we'll keep throwing ideas at him until he gets it nailed down. Persistance is the key!

Gaui Greatness X7, X5, NX4, X3

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03-08-2008 02:51 PM  10 years agoPost 14
Zaneman007

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Texas - USA

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Multigov

Old Guys Rule!

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03-10-2008 08:29 AM  10 years agoPost 15
Helijockey

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150 miles from somewhere

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Hi S76 Mech, I switched off the GV1 and flew the heli. There was a slight difference but not much Anything else which u feel I should check?

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03-10-2008 04:44 PM  10 years agoPost 16
Simmer

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Massachusetts

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I have a GV-1 just installed about two weeks ago, I also had a very fast throttle servo (9352) before I put it in. I feel the same thing with mine. Was much snappier without the GV1 but it would overspeed as I am not the best at curves I guess.
Still I want to use the gov I have. Might upgrade to a faster gov someday this summer never know but Ill use what I have. Cant get the RPMs above 2100 on the GV1 with a standard setup. I think I was up around 2200 without it. It was a rocketship before the GV1, I think Ill add some collective as I have about 12.5 degress each way now.

GV1 recommends a .21 .22 servo for throttle as its point less to go faster. I miss the snap.

Anyway, if its up to speed and it holds the speed, the gov is doing its job. might have been quicker for the faster throttle servo plus a degree or 1.5 degrees more before the gov

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03-10-2008 04:56 PM  10 years agoPost 17
Eury

rrProfessor

Dover NH

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If the GV1 won't let you go above 2100, you can change the gear ratio in it to allow it to spin faster. Your RPM on the display will be off, but with a little math it should be easy to do.

Nick Crego

Citizen #0168

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03-10-2008 05:01 PM  10 years agoPost 18
Simmer

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Massachusetts

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I heard about that trick

Hey what is the gear ratio anyway I think its 8.5 so thats what I put in there. If I do go higher by how much wold you suspect is appropriate as a first test? Ill have to doit at the field when someone has a SkyTach handy.

2100 should be fine for my type of flying but I still think the really fast throttle servo made it snappier. Oh well. A multigov is in my future, just dont know when, what I do know is its after the Gyro upgrade Guess Ill get the JR770, and pick up the 8900 servo a week or two later. Not that it doesnt fly well with the 401, I just know its time for me to upgrade, based on how long I have been running the 401, and the improvemnts in Gyro technology, Im a little behind the times.

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03-10-2008 07:02 PM  10 years agoPost 19
Sam2b

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Tacoma, WA

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If the GV1 won't let you go above 2100, you can change the gear ratio in it to allow it to spin faster
In my experience with dialing in and testing, there can be a large difference between 2100RPM and 2200RPM.

I run the multigov, and set stunt1 and stunt2 with 2100RPM and 2200RPM respectively. My heli seems to bog more in some maneuvers at 2100RPM. But while at 2200RPM the heli REALLY comes alive, and RPM performance is more consistent and does not bog nearly as much.
Note: I also run very aggressive gov settings rather than the default settings.

My theory is 2200RPM finally crosses the threshold of head speed momentum enough so much so the engine can more easily maintain while in a power maneuver.

I also like to compare it to running heavy wheels and tires on a luxury car. The heavier wheels' momentum while at highway speed helps the engine maintain driving speed and taxes the engine less.

My $0.02

_Sam B_

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03-10-2008 09:07 PM  10 years agoPost 20
S76 Mech

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Hatboro, Pa.

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Still thinking on this one...

Gaui Greatness X7, X5, NX4, X3

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