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HelicopterRadio - Servo - Gyro - Gov - Batt › JR G770 blowout cure?
09-11-2007 05:45 PM  10 years agoPost 1
R/C Speed Nut

rrVeteran

Galesburg, Michigan USA

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I am getting tail blowouts in fast backward flight when the bringing the tail down to enter an upright tail down funnel. At about 30 degrees down and entering a turn it will give out.
Also when doing a fast backward tight loop it will blowout.
Will adjusting the gain (mechanical or electronic) make any difference?
G7703D
9254
Evo 50
95mm Tail blades

Same setup with a G500T would not blow out on funnels but would slide a little (but not blowout) in the fast backward loop.


Mike

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

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09-11-2007 05:51 PM  10 years agoPost 2
nivlek

rrProfessor

Norfolk England

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Will adjusting the gain (mechanical or electronic) make any difference?
Suck it and see . You could also maybe try longer tail blades .

At the end of the day , it gets dark .

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09-11-2007 06:32 PM  10 years agoPost 3
DS 8717

rrProfessor

Here wishing i was somewhere else

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I would suspect a weak servo,the 770 is asking the servo to work harder. You might try a different servo.DOUG

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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09-12-2007 04:05 PM  10 years agoPost 4
R/C Speed Nut

rrVeteran

Galesburg, Michigan USA

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The strange thing is this servo worked fine with the G500T.
This gyro holds very good normally, it is just when the tail gets out into the wind the gyro just gives up.

ATV's 150
D/R 60%
Expo 40%
Gain 74% in gyro menu, so 48% actual
servo arm I have tried 17mm and 19.5mm


Mike

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

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09-12-2007 04:55 PM  10 years agoPost 5
Foamy Love

rrApprentice

Shelby Township, MI

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Don't use the 770 with a Futaba servo. The servo won't handle the frame rate.

I'm using a 770 with the 8900 and loving every minute of it. I can fly backwards a 100mph and no issues.

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09-12-2007 05:30 PM  10 years agoPost 6
DS 8717

rrProfessor

Here wishing i was somewhere else

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Has anyone used the 770 with an 8700G.

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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09-12-2007 05:32 PM  10 years agoPost 7
R/C Speed Nut

rrVeteran

Galesburg, Michigan USA

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I may try standard servo setting to see if I notice any difference before I put out $110 for an 8900G.


Mike

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

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09-12-2007 05:33 PM  10 years agoPost 8
R/C Speed Nut

rrVeteran

Galesburg, Michigan USA

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Has anyone used the 770 with an 8700G?
That is an option, I have one laying around.


Mike

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

PM  EMAIL  GALLERY  Attn:RR
09-12-2007 05:48 PM  10 years agoPost 9
DS 8717

rrProfessor

Here wishing i was somewhere else

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I know the 8900 is a little faster,but i think the frame rate is the same as the 8700.

YOU ONLY LIVE ONCE..IF YOU LIVE IT RIGHT THATS ALL YOU NEED

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09-13-2007 03:50 PM  10 years agoPost 10
R/C Speed Nut

rrVeteran

Galesburg, Michigan USA

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Standard servo mode was no help.
I will try the 8700G tonight.


Mike

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

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09-13-2007 07:01 PM  10 years agoPost 11
gt900uk

rrKey Veteran

Scotland

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I flew it with a 8700G and it seemd fine tail held well.

This Heli Will Self Destruct In Five Seconds!!

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HelicopterRadio - Servo - Gyro - Gov - Batt › JR G770 blowout cure?
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