osterizer
Posts: 1563
Joined: 3/10/2007
From: Sykesville,
MD, USA
Status: offline
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A lot of questions there, Newflee. Let's see....
ESC, you didn't mention the motor, and where the motor timing and governor settings are concerned, the motor really determines what you want to use. Set current limiting to "insensitive," brake off, and throttle endpoints to heli (fixed). Set the soft start to spin up soft (sorry, don't remember the exact nomenclature they use).
Pitch curves are pretty standard across the board. Set a linear pitch curve (0-25-50-75-100), and then adjust the heli so that bottom of the stick is -9 degrees pitch, middle is 0, and top is +9. You need to set it up for full travel, even if you're not going to use it, so the mechanics are in the right positions. Once that is set up, make your normal pitch curve something like 43-47-50-75-100; that will give you a couple of degrees down to full up. You can do all this in the pitch curve (normal) section on the second page of the standard menu; if you want to set the idle-up curves you'll have to go to the advanced menu, but the idle up curves should stay linear.
Throttle curving will also depend on the motor you're running and head speed you want. In general, take the no-load RPM of the motor (motor kV times the nominal volts, 11.1V if you're using 3S), divide that number by the number of teeth in the main gear (138). Divide your target head speed (about 2400 RPM) by that number to get the number of teeth you want on the pinion (you'll get a fraction, so round up).
When it's geared correctly, if you're not using governor, you'll want the normal curve to be something like 0-70-70-85-100. This will probably be different from the NR3D; you want to get the rotors spun up and spinning at a nearly constant RPM while you're flying, and the NR3D probably sped them up and slowed them down in flight. That reduces your stability and puts a greater burden on the gyro and tail servo, and it generally makes it less fun to fly- changing to a constant head is one thing that will make it fly a lot better than the NR3D. Idle-up should mirror the right side of the normal curve, or be a little higher but not too much, something like 100-90-80-90-100 or 100-85-70-85-100.
The 9C has a cool feature that delays the switch between flight modes. On the advanced menu, bottom of the first page, there's a "DELAY" item; in that section, set the THRO and PITC values to 20% or so. If you're using the same curves in normal and idle-up it won't make a difference, but if you (like me) run higher head speed in idle-up, this will transition between the two over about five seconds instead of jumping immediately from one speed to the other.
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All Forums >> RC Helicopters >> Electric RC Helis >> Helimax >> RE: MX450 XS Discussion Thread 
RE: MX450 XS Discussion Thread - 
I don't believe that's your I2 pitch- or is that for takeoff on the lunar mission? 
. It has the oldest 