Heli lifts as I throttle down

[PGpilot]

Hi All,

I'm a newb to the Blade, I've been taking it slowly, flying on Pheonix and just making sure the Blade is trimmed.
But today I ran it up to check the gyro, I was inside (in the attic) and just spinning the head up until it got light on the skids while checking the gyro.

I noticed that as I spooled down, the heli lifted a little, it wasn't a problem, until I spooled up to the point of lift off then cut the power quickly, the heli shot straight up; hit the ceiling and then hit the deck

Looks like the only damage is the feathering shaft, so it looks like I will be doing my first repair!

Well it went straight up, so the trim seems ok

Anyone know why it did it, is the pitch change too slow for the spool down?

[Ross Northcott]

did you cut the power via throttle hold?

[PGpilot]

No, just on the stick

edit one servo stripped too.

[WOODSTER]

Blade pitch going the wrong way seen it before heli spins up drop the throttle and away it goes

[spunkmyer]

If on throttle down it lifts then you need to look at these settings in the TX:

swash mix airl -75%
elv -75%
pitch +85%

See what yours are first and post them on here. Are you using the DX6I

[andylinney]

I'd be looking at your directions too, I'd be amazed if they weren't back to front, so the higher the throttle the more it was pinning itself to the ground, as soon as you were up to speed and the throttled back the pitch increased and the residual headspeed took it up into the rafters. Hopefully it's an easy fix for you but play it safe and order a mainshaft, flybar and a set of blades too, make sure they're absolutely straight before you re-use the crashed ones. Rolling them on a piece of glass is a nice way to tell if they're ok.

Check the blades carefully too, any sign of damage whatsoever means they're straight in the bin. Have fun.

Andy

[PGpilot]

Thinking about it, it probably was the pitch reversed, I was too busy watching the tail to notice.
I've ordered feathering shaft; main shaft & blades from Fast Lads.

Thanks Guys

[challis349]

If pitch was reversed, you wouldn't have left the ground in the first place, and wouldn't really of got light on the skids

[Boggy]

it certainly sounds like you have the swash reversed,the blade swash works opposite most set ups (the swash falls to raise the pitch and rises to lower it.)

engage throttle hold or better still disconnect two motor wires and check the following carefully

move the throttle stick up and down. all three servo's should move together,as you raise the stick the swash should fall. as you lower it the swash should rise.( if there is a problem go to the reverse menu in the set up list and alter the pitch/airl/elev servo's till they all work together correctly.

now the right stick.
stand behind the heli.
each movement of the right stick should move the swash the same. eg forward tilts the swash forward etc. if you have a problem go to the swash mix menu. you will see the 3 values set with either a + or - %
if the swash tips back instead of forwards change the value of the elev mix to opposite what it is now set at(eg from +60% to -60%)
if the swash tips right instead of left change the airl value to opposite.
if the swash tips at an angle when you apply forward stick change the pitch mix value to opposite

why run it up to check the gyro? do it static!

[TomW]

If pitch was reversed, you wouldn't have left the ground in the first place, and wouldn't really of got light on the skids

Yes you could if pitch is reversed... done it myself!

[extreme 3d]

Hi i would 100 % say pitch reverse seen with my own eyes on a freinds b400 which he repaired with out knowing the swash goes the opposite way .

[PGpilot]

Repaired it at the weekend, I didn't mention that I'd just put flymentor on it and yes the pitch control was reversed.
Got everything set up right now, just need to take it somewhere big to test it (learnt my lesson on flying indoors at home!)