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ZoomsHobbies . HeliHobby . Ron’s HeliProz South

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Thunder Tiger Raptors 30-90 - Imperio > Holding power of 401 gyro on R30
 
 
pwood
Key Veteran
Location: Dubai - UAE

Hi. I have a R30 with tt36 and weston pipe, the 401/9253 combo and SAB550 main blades and SAB080 tail blades.

My question is : How much tail kicking is acceptable / normal when full power is quickly added ?

If i am in a 15-20 foot hover and close the power to enter a maderate descent and then add full power quickly, the tail kicks 3-4 in. before the HH returns it to a straight climb. Is this normal ? should i work on trying to improve the holding of the gyro ? In a crosswind hover it is great and in a tail slide it is great. Can't fly backwards fast - (yet !)

I am fairly new to helis and have not seen them fly much so have no reference to work from.

I have read the string in the main section about "401 wont hunt" and have my gyro gain set to 95% and it also won't hunt. Is this the problem ? The ball on my servo arm is on the second hole and the limit on the gyro on +/- 100% ? By moveing the link out and then limiting the travel of the servo will this not reduce servo performance ? (re: low power on the 9253)

Any ideas, please help

Paul
04-02-2002 Over year old.
 
 
JasonM
Senior Heliman
Location: usa

Works great

Paul I have used the 401 and 9253 on my Fury Expert. It works ok but the servo wont hold in really hard manuevers. Depends on what style of flying you doWith a good servo like 9250 it works great. For a 30 it would be a perfect como. JM
04-02-2002 Over year old.
 
 
col
Veteran
Location: U.K. Ipswich.

hi, i would not accept any kicking and you should not be getting any.
sounds like the motor has a rich spot causeing the kick when you are changing throttle settings i.e. desending then climbing.
col..
04-02-2002 Over year old.
 
 
Gbouten
Senior Heliman
Location: Alamogordo, New Mexico

I run a 410 on both my Raptor 50 and Raptor 60. If I jam the power on while in a hover the tail will move a few degrees then will hold. I have been told this is normal. This only happens with a sudden burst of power.


Grego
04-02-2002 Over year old.
HOMEPAGE  
 
 
Doug
Elite Veteran
Location: Naples Florida....

Which Radio are you using? I know on the 9Z this can be a problem as the "Gyro" setting does not affect it correctly it takes an adjustment to the gyro ATV to get rid of the "kick"
04-03-2002 Over year old.
 
 
dwaynet
Senior Heliman
Location: Fairfax, Virginia

I would agree with col on
Quote 
sounds like the motor has a rich spot causeing the kick


Depending on the engine, you may be running in and out of a rich or lean spot in the engine. If you also are dropping cyclic to do a decent you are unloading the head and probably increasing the headspeed. This increase will also speed up your tail. As your tail speed increases so does it's effectiveness, thereby becoming more sensitive. Alot going on in a short amount of time. You might try lowering your gain about 10 pts and try it again, but I would say just fly it as is. Its not goin to cause you issues unless you drop, then floor it. Most aerobatic maneuvers don't do that sudden of a change and I wouldn't expect every machine/engine/radio/electronic combo to be perfect. You will always find limits, the trick is to fly so it looks like there are none. I like that, I may use that as my signature.

Dwayne
You will always find limits, the trick is to fly so it looks like there are none.
04-03-2002 Over year old.
HOMEPAGE  
 
 
pwood
Key Veteran
Location: Dubai - UAE

Thanks guys

When i go out again i will try leaning the idle out a bit, it is just a little rich.

I had the gain at 80% and the tail danced around quite alot, but i never worried too much adout it and then during the last outing i increased it to 85, 90 and then 95% and the tail movement decreased alot. I will make up a servo arm with a ball one link out and go and try that too, just for fun. Longer tail blades are going to be a problem as very few local shops do helis. But i will try get some.

Thanks for all the advice

Paul
04-03-2002 Over year old.
 
 
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Thunder Tiger Raptors 30-90 - Imperio > Holding power of 401 gyro on R30
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