OMG i did it ! idle up tonight in the garden!! [Archive]

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barks

05-30-2008, 04:47 PM

hi all
today is the first non windy day in ages and ive promised myself that the next time i flew it i would try idle up!
well, i connected the standard battery and hovered for a couple of mins then landed took a deep breath and throttled up untill it was just before taking off then switched the dreaded switch! :shock:
the head speed increased and it stuck to the floor, i took off and wow how steady is it! its great up and down (when i say so) i was confident enough to start doing big figure of 8ts and side ons.
i tried landing and it was ok a bit quick but controlled, i didnt fancy switching idle up off whilst on the floor so took off again and hovered then switched it off! the heli shot up into the air?
i figured that the pitch cant be right (even though i set it up the other day)
so i checked it and it looked perfect? possible -1 not zero. so lenghened both rods half turn and it looked more like zero. tracked fine.
second battery the big one, idle up straight away and took off, great hovering at 20 feet, rock steady, flew round the garden to the joy of the neighbours doing 8ts and side ons landing and taking off i really enjoyed it.
eventually it was time to land so i got into hover then switched idle up off and the heli shot up into the air about 10 foot !!
my lad videoed it great but can any one suggest why this wouild happen? the heli is setup fine.?
regards
barks :D :wow2:

jlira

05-30-2008, 08:20 PM

You passed me up! good job I haven't done it yet. Soon!!

Ber60

05-30-2008, 10:20 PM

Great to hear you worked up the nerve to flip the switch .
Hovering pitch for normal and idle up is not the same ?
In idle up, 70% stick (hover) must be the same pitch as in normal , cannot check because heli is downed.

helihathnofury

05-31-2008, 04:10 AM

Erwin, as you obviously are aware, depends on your T and P curves. Mine are very close around the 60% stick position, intentionally. The last time I was flying, I flicked "the switch" on the ground and very little changed. Just had to remember it was ON, and the ramifications whilst airborne. As for flying in idle up, didn't seem a lot different either. I guess that has a lot to do with my settings....

Mike

Ber60

05-31-2008, 07:13 AM

Agreed, Mike ,if you are flying with a ctx but you can not change much on the stock tx , the only way is a correct pitch setup on the heli, then and only then can you play with T and P curves to your liking
Glad to hear you tried the dreaded sw also, I will take it much slower, first I have to get airborne again

Ian 777

05-31-2008, 01:51 PM

Idle up is a doddle:YeaBaby:... only thing is in a crash you always strip the main gear if you dont remember flick back and throttle back just before you hit:roll:

just having stripped another one with no other damage to my heli...

Oh well:banana

Ber60

05-31-2008, 03:56 PM

sutty

05-31-2008, 06:16 PM

Hello Barks

You can adjust this, without changing your mechanical setup, since you described that you believed this to be correct anyway. There is quite a large range of adjustment possible with the stock Tx. Examine the details on page 13 & 14 of the stock Tx manual, it shows the effect of the pitch and throttle curve control knobs in both normal and idle up flight modes.

I cannot remember too clearly as I have a DX7 now but I think I recall that in the end I just used the right hand control knob to dial out a proportion of my normal mode pitch which meant that there was no pitch change when I flicked the switch at about 60% throttle.

Disconnect your motor and experiment. When you can flick the switch without the swash/servos moving you will have dialled out the pitch change and you will not have the problem again. This can definitely be achieved with the stock Tx, I know because I did it. The link to the manual is shown below, in case you don't have it. This will mean you have a higher head speed at lift off in normal mode, but if you take a note of the position you can change it if you are in an idle up mood.

http://www.twf-sz.com/english/download/manual/4&6Transmitter.pdf

Cheers