> <dunkeldw...@gmail.com> wrote in message
> news:aaa829d5-a419-47ef-8846-257e1b43b1fd@t63g2000hsf.googlegroups.com...
>> I have joined the wonderful world of RC.
>> After much deliberation I chose to go the heli route as I have a big
>> garden
>> and a park cross the road where I can practice.

>> I bought a TREX 450XL CCPM kit complete with Align 450L motor and
>> BL25T ESC.
>> The radio is a Spektrum DX7.
>> Batteries are flight power EVO Lite V2 2500mA.
>> Gyro is the Futaba GY401.
>> Charger is the Swallow Advanced and I have the flight power V Balance.
>> I built up the kit and had it set up by one of the experts from the
>> shop.
>> I have training gear attached.
>> Pinion was a 15T but I replaced it with a 13T.
>> I have been through about 10 battery's so far and I am managing to
>> hover at
>> about waist height for a few minutes at a time.

>> The problem I am finding is I am not getting good battery life.
>> After 6 or 7 minutes the Trex starts pulsing which I am told is the
>> sign
>> that the battery is going flat.
>> If I let the Trex rest for a few minutes (I assume the battery is
>> recovering
>> during this period), I can then take off and hover for a few more
>> minutes.
>> After the batteries cool down, the 2 of the 4 leds on the V Balance
>> fuel
>> gauge light up for each of the 3 cells in the pack.
>> It could be my beginner way of flying, it could be not enough pitch ,
>> new
>> batteries, training gear weight,
>> not enough pinion main gear slack etc. etc.

>> What I would like to do first is change the pitch curve.
>> It's in the normal position now with values of

>> L=20.5 (is this too much negative pitch and should I change it to say
>> 50%?)
>> 1=55.5
>> 2=77.0
>> 3=92.5
>> H=100

>> Throttle curve

>> L=0
>> 1=20.5
>> 2=43.0
>> 3=69.5
>> H=100

>> Am I on the right track?

>> What do you suggest as a first step?

> When the Trex starts pulsing STOP flying and charge the battries or you
> will fook them up.
> For longer flight times use a 11T Pinion, it will do you for just hovering.
> Next get a pitch gauge
> Then........

> pitch ....

> Norm.
> 40 45 50 75 100

> Idle 1...
> 0 25 50 75 100

> Idle 2...
> 0 25 50 75 100

> Throttle  you will have to play around with depending on what pinion you
> are using

> My t-rex 450 is  set up like this on  13T Pinion

> Pitch

> norm
> 40 45 50 75 100

> idle up 1
> 0 25 50 75 100

> idle up 2
> 0 25 50 75 100

> Throttle

> norm
> 0  50 70 70 80

> Idle 1
> 90 85 80 85 90

> Idle 2
> 100 95 90 95 100

> I use the same Pitch curves on my T-rex 600e  and two t-rex 600n's

> Have a look at a video called .....Pitch and throttle curves 101

> http://www.helifreak.com/showthread.php?t=11373