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12-08-2004 06:44 PM  13 years agoPost 1
Dr. Fibinotchi

rrKey Veteran

Sioux Falls SD

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This may be a silly questions, but only the un asked questions are dumb. Someone told me that the processing in the two gryros is vertually the same and the only diffrence between the two is the remote adjustment on another channel. Is this correct or is the preffered the 240 for another reason. Any feedback would be great as I have heard both are good gyros..

-Cody

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12-08-2004 07:33 PM  13 years agoPost 2
rob10000

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Western Massachusettes

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gy240 doesnt have provisions for using the faster frame rate servos, such as the S9253 and S9254

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12-08-2004 08:15 PM  13 years agoPost 3
Dr. Fibinotchi

rrKey Veteran

Sioux Falls SD

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what about the HS 50 for tail servos.
...is the frame rate on this servo fast enought to make use of the 401? Or should the 240 use all of the servo..

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12-09-2004 01:25 PM  13 years agoPost 4
electron_flyer

rrApprentice

Cape Town, South Africa

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If your not going to use a Futaba digital servo, and dont need to change between HH and normal rate, then the GY240 should be just fine. I have 2, but am starting to get to the stage where I could use a little extra performance in the tail department so am considering getting the 401/9253 combo. This is only after about 2 years flying so one can debate that if may have been worth buying this up front. Also depends if you are going to be getting into 3d flight at all.

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12-11-2004 04:05 AM  13 years agoPost 5
Helnet

rrApprentice

Canada, Québec

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Difference between 240 and 401 are:

240 is a 401 less 240 does'nt support digital servo and no adjustement from radio that's it.

That's a very good gyro for electric and gas except if you have a digital servo and need to adjust the sensibility from the radio take a 401.

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12-11-2004 04:25 AM  13 years agoPost 6
KnimRod

rrApprentice

Central Michigan

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There's another important distinction in that the GY240 does not support servo travel limiting while the GY401 does.

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12-13-2004 09:07 AM  13 years agoPost 7
electron_flyer

rrApprentice

Cape Town, South Africa

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KnimRod,
Can you explain this please, and tell me If I got this wrong, reffering to HH mode here:

The output of the gyro combines the manual input from the rudder stick with a correcting input from the gyro to maintain a selected course.

Using ATV from the radio adjusts the % of manual input into the 'mix' ie to increase piro rate, increase ATV limits. Gyro input % to the 'mix' is adjusted using the pot on the 240 and/or another channel on the 401.

Either way, if any/either of the inputs cause the output to 'max out', overtravel of the servo can happen causing binding/ excessive battery drain.

We are told in flight this can never happen as the tail is always reacting to the input wheras on the bench it is not.

So if this is the case, why do we need to limit the endpoints?

(I have one answer already, so that in an undriven tail auto situation where that tail DOESNT react to input, binding can be eliminated).

Am I on the right track? Any other reasons for this feature?

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12-13-2004 05:21 PM  13 years agoPost 8
KnimRod

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Central Michigan

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With the GY240, the max. rates are somewhat fixed and changing the tx ATVs will only do so much. With the GY240, I have to optimize the linkages for some compromise between mechanical gain and binding. With the GY401, I can set the end points of the gyro control to match the mechanical limits of my control system and not worry about the binding but still have optimum range of control and speed.

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