RC Helicopter: T-Rex 250 gyro ground test Align GP750 & DS420

[vespira]

Nice blades colors! The blade tracking looks way off though in this video.

[mrrjcook]

is the red thing a speed up

[SamuelChung94]

hey i have a question, is the the tail belt driven? or does it have a motor there like many indoor helis

[ecoovert]

I am new to helicopters and am having trouble with my rudder being way to sensitive. When I try to hover my copter spins in one direction so I move the trim one click in the opposite direction which causes the copter to spin in the opposite direction. Is this a sub trim issue in the radio settings or is it a physical issue like moving the rudder control rod one hole closer to the center of the servo horn on the rudder servo? If a radio issue how do I reduce the rudder sensitivity?

[MrBinkynator]

Science. Gotta love it. :)

[7249xxl]

you know if did the same onley from lego and it works and flies but not far 20 meters and than the rotor blades explode but i made them from paper but im gluing them now and it worsks good

[hoffbran]

flip idle up switch on basically puts your head speed at a constant, then wen u go upside down bring the throttle stick all the way down like badbram said and you will stay in the air

[pynqlydz]

hey can i use my walkera transmitter 8ch for trex 250

[lockpicker2k]

@Driftking3268

A delicious Greek sandwich!

[p4n0sgr]

haha right :)

[Driftking3268]

I know this is a stupid question but what is a gyro?

[MarshFacev2]

good video, it feels strange watching it controlling a helicopter because I use the same remote control systems for the robots and things that I make.

[Flap1987]

wooooow

nice!

[AZURERACE]

HI. i fly phoenix a lot. How do you hover upside down? I liked your vid

[bugjoke489]

watch my vid and u will maybe understabd a bit.

[BadBramiBoy]

change thortle curve for Idle up (stunt ) into 100-90-80-90-100

this means that when you go in Idle up and your stick is completely low, your thorle will be at 100%, if you're not upside down, because your pitch will be at negative and your thortle at 100% you'ill fall EXTREMELY quickly,

but if you go upside down and then put stick low, you will be at negative pitch but you're upside down, so you'ill stay in the air

it's a bit complicated to explain like this, sry if you don't understand.

[ZEFFd]

you're on the right path. good work!

[jasmine2501]

Groovy blades dude! Definitely would help with visibility. Great idea!

[MiniaviationDotCom]

Thanks dudette! It's nice to read a comment here from the T-rex 250 guru herself.

The bottom side of the blades have been painted the opposite way, it's gives a nice visual effect during transitions from top/bottom view. Revell paint colors 12 (gloss yellow) & 51 (gloss blue)

[jasmine2501]

Cool... I have some of that :)

It didn't throw them off balance or anything?

[MiniaviationDotCom]

The center of gravity is good, the balance is off by only 2 degrees, so it seems okay.

The paint layer is very thin because it's airbrushed.

[MiniaviationDotCom]

The helicopter is mounted on a rotatable platform made from Lego.

Testing the gyro and tail servo under load, variating pitch and motor RPM.

Click on the video's "more info" link to read all the technical stuff.