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T-REX 450 › tail blows out when doing punchout torque tube tail
01-15-2010 09:00 PM  8 years agoPost 1
wc_wickedclown (RIP)

rrProfessor

long beach calif

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tried to take her up today , but i need to make some adjustments to the rudder servo .

but the motor sound nice and all in all i love the new setup and im gonna order a 12t pinion

Watch at YouTube

im useing futaba 401 gyro and i lowered the gain from 40 to 35 guess thats my first problem
and look at my rudder servo i need to reconfigure it so its straighter ?

rudder rod is to close to the boom.


By wc_wickedclown, shot with KODAK EASYSHARE M1073 IS DIGITAL CAMERA at 2010-01-15

thanks for comeing and offering your advice.

Insha Allah made in america

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01-16-2010 12:43 AM  8 years agoPost 2
cation3

rrApprentice

Smyrna, GA - USA

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Assuming it holds fine in other flight situations (FF, wind, etc.) and your carbon rod is not binding:

Too much collective pitch.

When you punch it, the excessively high blade pitch bogs the head, you lose headspeed and the tail rotor loses it's ability to overcome the torque and the heli rotates - then recovers when you come off the collective. Try reducing your pitch swash mix and see what happens. There's a fine line between too high a pitch setting and too low "pop". Lowering pitch may actually allow you to maintain a more consistent (high) HS and make your heli fly better.

Try that or increase your power system to power through the high (drag) pitch.

HTH,
-Drew

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01-16-2010 12:51 AM  8 years agoPost 3
Melnic

rrElite Veteran

Columbia, MD,USA

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King of Bling does not have a GY520?

Basics:
crank gain till it starts to wag in a hover or small punch outs, then back off 5 points.
Hard 360 piro and see if it wags at the end. If so, move delay up.

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01-16-2010 02:58 AM  8 years agoPost 4
Justin Stuart (RIP)

rrMaster

Plano, Texas

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Try some longer t/r blades. Maybe they are too short and stalling?

Avant RC
Scorpion Power Systems
Thunder Power RC
Kontronik Drives

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01-16-2010 02:22 PM  8 years agoPost 5
wc_wickedclown (RIP)

rrProfessor

long beach calif

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King of Bling does not have a GY520?
king of bling lol another forum gave me that name , are you from
one of the other forums i go to ? lmao if not lol small world
the name is getting around and im seeing a few guys now starting to blingit or i like to say trick it out.

well i took the gp750 off and installed it on the raptor
until i get a spartan quark.

but another thing that i had been thinking is that with the belt setup i used 40% gyro gain so for some reason i thought the lower
the gain the better .

so hopefully i should be able to use 50 to 75% gain without any wag
like most other guys i see on the net useing atleast 70% gain.

with the belt punchouts where fine with 40% gain 36% might have just been to low.

Watch at YouTube

Insha Allah made in america

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01-17-2010 02:03 AM  8 years agoPost 6
outhouse

rrVeteran

auburn ca

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get teh K@B 61mm tail blades and your problem will be solved.

chances are you wont be able to outfly the gp750 for years to come.

quark is nice no dought, my buddy loves his but i cant ouitfly my current gyro when I do ill upgrade.

your issue is not gyro related its mechanical

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01-17-2010 02:38 AM  8 years agoPost 7
wc_wickedclown (RIP)

rrProfessor

long beach calif

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here is a vid of my heli , i oredered a carbon align boom
its a bit tail heavy with the metal boom and i ordered longer metal battery tray and metal tail fork and metal tail pitch on the way .

then im gonna finish building my second 450 that im gonna get more flight time with .

but here it is and how do you like it ?.

Watch at YouTube

Insha Allah made in america

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