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HelicopterRadio - Servo - Gyro - Gov - Batt › 611 and 9256 vs. Jr 770 and new Jr tail servo
09-10-2007 08:35 PM  10 years agoPost 21
raptorheli2

rrElite Veteran

rip off britain and no changing it

My Posts: All  Forum  Topic

ok, i'm sponsored by spartan rc but notice i never said buy a spartan gyro above? i have owned several 720's and had a couple of flights only with the 770 which were not my own helis/gyros.

but now you have insisted then i would have the 760 spartan over the 2 mentioned above.

cheers*


www.waterfoothelis.com

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09-10-2007 08:54 PM  10 years agoPost 22
FlyHuge

rrApprentice

Colleyville, Texas

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Thanks for the feedback on the CSM720 vs JR770 vs 611.

Now can someone explain more detail on what deadband is and what adjusting the DR/EXPO would do on both the rudder channel and gyro sens channel on a gyro?

I understand the adjusting the limit on the rudder will adjust its piro rate and adjusting the limit on gyro sens channel is the snesitivity or using gyro sens menu on some radios. If not correct please advise.

Thanks all for the info. Good thread.

- Doug

Cra$h’n with a Heli good time!

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09-10-2007 09:10 PM  10 years agoPost 23
raptorheli2

rrElite Veteran

rip off britain and no changing it

My Posts: All  Forum  Topic

deadband is how the gyro feels in the middle. i.e around centre stick. the jr 770 is VERY, note that down as VERY VERY sensitive around the middle and you will put in inputs you don't want easily with this gyro if you fly thumbs only. to help with this we can dull down the feel (effectively slow it down) by using expo which makes it feel better around the centre.

DR is thre to adjust the piro speed.

cheers


www.waterfoothelis.com

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09-10-2007 09:14 PM  10 years agoPost 24
FlyHuge

rrApprentice

Colleyville, Texas

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Thanks Raptor. Do you dial in Expo on the rudder channel or Gyro Sensitivity Channel?

Thanks,
Doug

Cra$h’n with a Heli good time!

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09-10-2007 09:24 PM  10 years agoPost 25
R/C Speed Nut

rrVeteran

Galesburg, Michigan USA

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Rudder channel.


Mike

Funky Chicken?!!..........I thought this was how you do a piro flip!!

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09-10-2007 09:40 PM  10 years agoPost 26
colsy

rrElite Veteran

Cambridge, UK

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the jr 770 is VERY, note that down as VERY VERY sensitive around the middle
Note the 'VERY VERY' bit,...

The 720 has deadband built in around the centre (I.E a small area around 'centre' stick) that doesn't do anything. '''for those of us with clumsy thumbs''

Col.

Only Quote From Experience.

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09-11-2007 01:25 PM  10 years agoPost 27
robert_h

rrNovice

Germany

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Fly both the 770 and 720's in an Acrobat SE.

Both are great. Used to fly the 720 a lot. Now i fly the JR.
At the beginning with 770 i had problems with the stops. Now it's getting better. That is a real clumsy thumbs problem. Must have been the nice deadband from the 720 which i was used to have. Anyway, both great and no reason for me to buy the display heavy futaba toys.

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09-13-2007 01:32 PM  10 years agoPost 28
viperviper

rrApprentice

Australia

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any more comments or input.... still can't decide which gyro combo set to go for.. 611 set or 770 set...

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09-13-2007 01:47 PM  10 years agoPost 29
BJames111

rrElite Veteran

San Diego, California

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you won't go wrong with either. Don't let the decision keep you out of the air. Just close your eyes and point. Open your eyes and buy the one you're pointing at!

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09-14-2007 05:39 PM  10 years agoPost 30
viperviper

rrApprentice

Australia

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hey.. keep the comments streaming in. tks..

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09-15-2007 03:45 AM  10 years agoPost 31
windheli

rrNovice

Adelaide, SA

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I just found 8900G doesn't have O-rings. How can it against the oil?
Don't suggest me to move the tail servo to the head. there is no space already...

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09-15-2007 03:52 AM  10 years agoPost 32
jab1969

rrVeteran

Fort Worth 76137, Texas , USA

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What machine is it on? could, I also suggest putting it up front.

Xtreme Power Systems, @Signs

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09-15-2007 04:02 AM  10 years agoPost 33
windheli

rrNovice

Adelaide, SA

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Well, it is a Raptor 50. I installed push&pull for elevator and pitch. there is no sapce for a tail servo anymore.

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09-15-2007 11:45 PM  10 years agoPost 34
plantone

rrVeteran

Perth wa

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Hi All

I just want to throw a spanner in the works here the CSM 560 with version4 software in it is also an awesome gyro.Below i have listed all the gyros if have flown in & in order i rate them taking into account ease of install & setup, pirorate consistantcy used in F3C style flying.

1, CSM 720
2, JR 770 T
3, CSM 560 v4 micro.
4, FUT 601 ( not had a 611 )
5, CSM 560 ( brick v3 )
6, JR6000 T
7, FUT 502
8, CSM 360
9, FUT 401

The only gyro iv had any problems with drifting was the 6000t.
The CSM 720 has more features than the 611 & is smaller , lighter, flies better, & easier to set up plus you can run whatever servo you want to including the 9256 from the 611 gyro you cant go wrong.

Thanks Wayne

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09-16-2007 05:19 AM  10 years agoPost 35
Sky Dancer

rrVeteran

Bryan, Texas

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CY Solid G Gyro

I'm not a sponsored pilot, but I was fortunate enough to have the opportunity to replace my 601 with a Curtis Youngblood Solid G Gyro. Super simple, Rock Solid hold, great constant rate piros with outstanding stopping power. This is the first Gyro I've had that didn't require spending time testing, adjusting and otherwise messing around with. It goes without saying, I won't be using my 601 again.

Keep up your rotor speed !

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09-16-2007 06:16 AM  10 years agoPost 36
THX1138

rrElite Veteran

Camp Bondsteel, Kosovo

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Great thread, there is lots of good info in here. I have flown several 401's, a G500T, a G5000t, a 601, and own a 720 for my Stratus. I am very interested in the 770 3D because it does not have the gyro amp and extra wieght. I have heard lots of good things about it and I am sure it will hold it's own when it is all said and done. I just picked up an Ion-x that has a 611 on it and I will report my findings with it as well.

I love my 720. I use a HS 6965 with it and all is run on 6v. I went with the 720 because it is a one piece unit, it was at the time the lightest gyro available, and it could be run on 6v eliminating the need for a step down. I would say it did take a little tinkering to get it right, maybe 2-3 tanks, but when I did it has been rock solid. Consistant piro rates and solid stopping. It does everything I would ever want a gyro to do.

On the back side of this, loads of people complain about the drift that JR gyros are "known" for. On any one I have ever flown or set-up, after a click or two of sub-trim, they all held flawlessly. There were a few occasions early in my flying career, that I would blow out my 500T. But i attribute this to improperly tuned engine and poor collective management leading to loss of tail authority then blow out of the tail.

These are the facts of the case, and the facts of the case are these.

Fly what you like, and remember, not every gyro works on every heli.

Lou

Just give me five dudes and two flashbangs...

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09-20-2007 10:40 AM  10 years agoPost 37
viperviper

rrApprentice

Australia

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anymore comments.. before i plunge into the buy.....

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09-20-2007 07:10 PM  10 years agoPost 38
wouter

rrApprentice

Belgium

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i just took the plunge.

I'll have my 770T next week.
The one-piece, 401-style design and the reasonably low price did it
for me.

My 3 year old 401/9253 combo is still going strong but i wanted to
try something else.

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09-21-2007 09:29 AM  10 years agoPost 39
bladrunner

rrApprentice

..

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Who has the 770 3D in stock?
Is it G770T 3D gyro everyone is talking abouht?

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09-21-2007 12:52 PM  10 years agoPost 40
mcfast

rrKey Veteran

Quebec Quebec Canada

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611 and 9256, All the way!

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HelicopterRadio - Servo - Gyro - Gov - Batt › 611 and 9256 vs. Jr 770 and new Jr tail servo
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