Okay sorry. Model is T-Rex 450 SE V2 with standard ESC and motor but I'm
using Flight Power 2170mah batteries.
The problem I had is after about 3 to 4 mins flying, the engine pitch would
drop noticeably and I'd loose power. it was suggested that my hover pitch
was too high causing my motor to overwork and get hot which is what led me
to check the settings. I have no idea why these settings were made, I took
it for granted I was being given good advice.
Anyway, pitch curve is linear, 0 to 100 in and out. My actual pitch is about
10 degrees going from -2.5 at 0, 0 at 25%, + 2.5 at 50%, +5 at 75% and +7.5
at 100%. I hover at about 80% stick.
Mt throttle curve is wierd. 0 out at 0 in, 25 out at 25 in, 50 out at 50 in,
but then it goes 55 out at 75 in and 60 out at 100 in.
I am quite new but I'm sure this is not right.
> Okay sorry. Model is T-Rex 450 SE V2 with standard ESC and motor but I'm
> using Flight Power 2170mah batteries.
[quoted text clipped - 11 lines]
> Mt throttle curve is wierd. 0 out at 0 in, 25 out at 25 in, 50 out at 50 in,
> but then it goes 55 out at 75 in and 60 out at 100 in.
my CCPM XL throttle 0 40 68 85 100 for normal
pitch 2 5 7 11 14
and it hovers at 1/2 stick but its probably to much pitch at full throttle
JohnR - 18 Sep 2007 19:20 GMT
Thanks Kevin. Those settings are what I would expect to see given my very
limited experience. My settings are well wierd.
> > Okay sorry. Model is T-Rex 450 SE V2 with standard ESC and motor but I'm
> > using Flight Power 2170mah batteries.
[quoted text clipped - 15 lines]
> pitch 2 5 7 11 14
> and it hovers at 1/2 stick but its probably to much pitch at full throttle
Kevin - 18 Sep 2007 19:35 GMT
> Thanks Kevin. Those settings are what I would expect to see given my very
> limited experience. My settings are well wierd.
[quoted text clipped - 24 lines]
>> pitch 2 5 7 11 14
>> and it hovers at 1/2 stick but its probably to much pitch at full throttle
mine experience is not a lot better but I can fly circuits just???
the manual says pitch 0deg, half stick +5 +6, full +9 +11
throttle 0 40% 65% 85% 100%
>Okay sorry. Model is T-Rex 450 SE V2 with standard ESC and motor but I'm
>using Flight Power 2170mah batteries.
You should get 5-7 mins out of this setup depending on your pinion
size.
>The problem I had is after about 3 to 4 mins flying, the engine pitch would
>drop noticeably and I'd loose power. it was suggested that my hover pitch
[quoted text clipped - 5 lines]
>10 degrees going from -2.5 at 0, 0 at 25%, + 2.5 at 50%, +5 at 75% and +7.5
>at 100%. I hover at about 80% stick.
OK, this is bit goofy, but not completely out of whack...
>Mt throttle curve is wierd. 0 out at 0 in, 25 out at 25 in, 50 out at 50 in,
>but then it goes 55 out at 75 in and 60 out at 100 in.
DING! Your throttle curve is WAY out of whack. You're asking the
motor to spin at a slow speed while driving a relatively high pitch.
These motors run best at high speeds. This will draw less amperage
and everything will run cooler.
>I am quite new but I'm sure this is not right.
I'm no expert, but I'm getting nearly 6:30 out of TP 2100 packs on an
SE with a 13T pinion and the 430L motor. On my SEV2, I get 5:30 using
25C packs, 13T pinion and the 430XL motor.
Here's how I've got mine set up:
NOR
Pitch - -4, -2, 0, 6, 11 (in degrees. You may not get to +11 since
I've modified my washout block a bit. The "key" here is 0 degrees at
half stick, with a linear curve above half stick and a reduced
negative range below half stick (Useful for descending in the wind)
Throttle- 0, 50, 90, 95, 100 - Note the midpoint. Throttle at 0 pitch
on the blades will be 90%. You're up in the motor's "power band" and
from there it will increase as you add pitch. This will lower your
Amp draw and keep the motor, battery and ESC cooler, *AND* extend your
run time.
In addition, this will get you hovering above half stick, which is
where you'll be hovering once you get into idle up flight. Just be
aware this will push your headspeed up near 3000 RPM with a 13Th
pinion. Make sure your blades are balanced and well tracked *AND* you
run no less than the pro-woodies (Tech-MP's woodies are identical, but
without the fancy graphics) as lesser blades could come part at that
speed. The sound is intimidating, but the heli will be more stable
and a bit more responsive.
For idle up settings:
Set the pitch curve to be linear: 0 - 25 - 50 - 75 - 100 and if your
mechanics are set up properly, that should net you around -10 - +10
pitch range.
Throttle set to 100, 95, 90, 95, 100.
If you're thoroughly confused, head over to www.helifreak.com and
check out Finless Bob's Tech Room, for setup videos, specifically the
450 SE build videos. There are about a dozen videos there that will
guide you through everything from the actual build to setting up the
head, to gyro setup to maintenance. I would suggest you start with
the CCPM1 and CCPM2 videos as they'll directly address your current
issue.
Good luck!
JohnR - 19 Sep 2007 21:59 GMT
Thanks again to both Kevins. I'm off to tinker and probably mess it up
completely. I'll kepp you posted on how it's going
JohnR
> >Okay sorry. Model is T-Rex 450 SE V2 with standard ESC and motor but I'm
> >using Flight Power 2170mah batteries.
[quoted text clipped - 68 lines]
>
> Good luck!