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HelicopterBeginners Corner › Overcoming torque
10-18-2004 03:37 PM  13 years agoPost 1
aambrose

rrElite Veteran

Pana, IL

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Being a beginner, I am hovering my VelociRaptor 50V2 and doing some forward flight. I've noticed when I give it a quick burst of throttle, the tail kicks to the right (nose to the left) because of the torque. Is there a setting on the gyro or the transmitter that will compensate for this and keep the tail from shifting so much under quick bursts of throttle? I'm running a Futaba GY401/9354 and have a JR 8103 heli version transmitter.

Thank you!


Tony

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10-18-2004 03:40 PM  13 years agoPost 2
dariof

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Henderson, NV /​Laguna Niguel, CA

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1).. Make sure the Rudder Offset is OFF in your Tx
2). Turn up the gain on your gyro a bit...not so much that you get tail-wag, and make sure you are in HH mode.

3). Your gyro/servo combo is fine.

Properly set-up (you are close) the effects of torque will go away.

Best Regards, Dario

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10-18-2004 03:53 PM  13 years agoPost 3
aambrose

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Pana, IL

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Thanks Dario.

To set the gain on the gyro, is that something I do on the Tx or do I have to make the adjustment on the gyro itself?

Thank you.


Tony

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10-18-2004 03:56 PM  13 years agoPost 4
gamedemon3000

rrApprentice

Goose Bay,​Newfoundland &​Labrador, Canada

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im sorta gettin the same problem. i have a raptor 50 v2 with tt50, the gy-401 and s9254. i sett the gain just below where it wags, but then if i do a quick climb the tail moves about 30 deg right and stays there. if i do a quick decent itll kick 30 deg left. and if i do a quick decent and then a quick climb right after the tail kicks about 60 deg right. whats up? maybe new tail blades would help? or maybe something as simple as moving the servo rod rarther out on the horn? perhaps is even my battery? its a 1700 mah 4 cell nicad pack at 4.8v. just throwing stuff out in the air here.

Derek O'B

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10-18-2004 04:15 PM  13 years agoPost 5
BarracudaHockey

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Jacksonville FL

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Make sure your REVO mixing is inhibited.
Make sure you turn on your TX first and then your RX. Let it sit 3 or 4 seconds untill the Gyro light comes on steady. If the light is flashing your in Rate mode.

Make sure your rudder trim and sub trim are centered. Adjust the gyro gain by the ATV on the gyro channel (usually 5)

Andy
AMA 77227
http://www.jaxrc.com

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10-18-2004 04:16 PM  13 years agoPost 6
playfair

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Rochester, NY

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Additionally, if your gain is high enough (mine is at 70% set via the ATV gear channel) AND you are in HH mode, then the problem may be that your head speed is changing when you increase collective. Try and have it tached, or have a trained ear listen as you pull out. If none of this is available, increase your hover throttle point and see what happens.


The sky is our canvas

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10-18-2004 04:52 PM  13 years agoPost 7
gamedemon3000

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Goose Bay,​Newfoundland &​Labrador, Canada

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revo is inhibited, im running a tj pro. i put it in rate, take off, trim it so its not drifting, land, flick the switch three times and leave it in hh mode. after i did this the trim tab hasnt moved much at all, i centered it pretty good mechanically. there is no end point settin in my tx, and the atv for ch 5 was at bout 50 before it would wag. the rod was in the closest hole in the servo horn. any more ideas?

Derek O'B

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10-18-2004 04:57 PM  13 years agoPost 8
BarracudaHockey

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Jacksonville FL

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On mine the ball is 14mm from the center of the servo arm.

Try centering the trim and flying in HH mode from the start.

http://www.raptortechnique.com has a great article on gyro setup. I fly futaba so I'm not familiar with the JR programming so I won't try to comment on that but he has the setup for several different popular radios.
Andy

Andy
AMA 77227
http://www.jaxrc.com

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10-18-2004 05:02 PM  13 years agoPost 9
cjw

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UK - Cheshire

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You may also need to use longer / wider tail blades. I found that the tail on my Rappy 50 would kick a little when I give full (or near full) collective using the stock tail blades. Increasing gyro gain didn't help. When I replaced the stock blades with thicker chord, longer ones (85mm NHPs) the problem went away

Clive

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10-18-2004 05:18 PM  13 years agoPost 10
aambrose

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Pana, IL

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I have the Heliproz VelociRapter 50 Pro package which includes 80mm carbon tail blades. I'm not sure what my settings are on my Tx since it is not with me at the moment. I did the other stuff such as turning on the Tx first then the Rx and letting the gyro set itself (stop blinking). Also, no governor. I'm not sure of my head speed but in the past, it has had a tendancy to run high (above 1600).
Thanks!


Tony

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10-18-2004 07:48 PM  13 years agoPost 11
gamedemon3000

rrApprentice

Goose Bay,​Newfoundland &​Labrador, Canada

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well, im using a futaba fp-t7uafs radio, and i turn it on first, then when the rx is turned on it is left alone for aa few seconds to let the gyro initialize. im running 1650 for hoverin, and 1825 for 3d using my tj pro. i figure the problem is the tail blades.

Derek O'B

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10-18-2004 08:31 PM  13 years agoPost 12
BarracudaHockey

rrMaster

Jacksonville FL

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I have the same heli, including the tail blades with a 401/9254 and can punch the throttle as hard as I want and it won't piro w/o a rudder stick command.

Andy
AMA 77227
http://www.jaxrc.com

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10-18-2004 08:48 PM  13 years agoPost 13
aambrose

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Pana, IL

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Can you give some insight as to what settings you have for mixes, gyro gain, etc.?

Thanks!


Tony

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10-18-2004 09:00 PM  13 years agoPost 14
gamedemon3000

rrApprentice

Goose Bay,​Newfoundland &​Labrador, Canada

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delay a 0, limit at 110, highest gain before wag is 55, rod in the closest horn to the servo, no mixes at all, ch 5 for switching between hh and norm, gyro mounted with the 2 way tape that came with the raptor kit, ch 4 atv is 120-120, no dual rates, expo is -20. fully stock raptor 50 with tt50 pro still a bit rich (can keep my finger on the backplate forever, but its very warm), running tt600 carbon blades, ksj paddles, tj pro set at 1650 for norm and 1825 for 3d. gy-401 gyro with s9254 servo for tail, hitec hs-605 on collective, roll, and elevator, hitec hs 425bb on throttle, 1700 mah 4cell 4.8v battery, standard switch harness.

Derek O'B

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10-18-2004 09:10 PM  13 years agoPost 15
aambrose

rrElite Veteran

Pana, IL

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Snibs,
Are you having the same problem as I am? If so, I was hoping barracudahockey could give us some insight as to what his settings are since he has the same heli.

Thanks!


Tony

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10-18-2004 09:30 PM  13 years agoPost 16
gamedemon3000

rrApprentice

Goose Bay,​Newfoundland &​Labrador, Canada

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yep, hold good in hover, but kicks on climbs and decents?

Derek O'B

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10-18-2004 09:32 PM  13 years agoPost 17
gamedemon3000

rrApprentice

Goose Bay,​Newfoundland &​Labrador, Canada

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btw, sorry if im kinda hijacking your thread.

Derek O'B

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10-19-2004 02:16 AM  13 years agoPost 18
playfair

rrKey Veteran

Rochester, NY

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gamedemon, I'll bet your prob is your linkage position as barracuda mentioned. mine is 13mm I believe (second from last) but most people run them all the way out. Your servo has too far to travel to make a difference in a short amount of time. Move it out and see what happens.


The sky is our canvas

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10-19-2004 03:01 AM  13 years agoPost 19
jerrythercpilot

rrVeteran

--South Florida --

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A too slow rotor speed could also cause this. What are you running in a hover? Run at least 1550 or a little higher.

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10-19-2004 03:46 AM  13 years agoPost 20
gamedemon3000

rrApprentice

Goose Bay,​Newfoundland &​Labrador, Canada

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i said a few times that i run 1650 in hover, and 1825 in stunt, so thats ruled out. i tired it at the furthest hole out from the servo horn once, a long time ago, but i think the gain setting was real low so i moved it in to see if i gould get the gain up without wagging.

Derek O'B

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