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Jan 24, 2008, 02:05 PM
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HS-65 terrorism

Well, it's official. It really costs $60 to crash the Taiwannosaurus. Our first bill is metal gears for all the HS-65's. Got karbonite because that was all anyone had, and now they're all stripped. Even with metal gears, the days of cheap crashes R clearly over. That wasn't even a hard crash.

Suspect the gears failed in flight and caused the apparent yaw control loss when it was really cyclic going.

Found no slippage in the tail rotor. It only has 1 grub screw. The only explanation is now excessively low head speed + lack of a heading hold gyro. Low head speed for longer flight time is a goal of Vicacopter's, but we're just trying to get off the ground for now.

The grounding of Vicacopter due to crashes & weather still pushes Vicaglider forward.

To set the starting function to 0x0200 with multiple objects:

Add --ivt-loc=0x0200 to the CFLAGS to set the interrupt vector at 0x0200.

Declare main as void main() __interrupt 0 to bind it to the RESET vector.

Todays SDCC discoveries: --optimize-df --optimize-goto --optimize-cmp --obanksel=2

Unfortunately, a proper C port was not fast enough for software UART. The only way to do it is to make every variable global & declare all functions as __naked. That eliminates the stack on SDCC.
Last edited by Jack Crossfire; Jan 24, 2008 at 04:06 PM.
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Jan 24, 2008, 04:52 PM
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Check for servo binding.

You should set a pitch curve from -5 to 11deg, Governor mode activated on the ESC (to save power) with a flat throttle curve at 90%.

To lower the head speed it is always better to change the motor pinion. It is also possible to lower the head speed by lowering the governor mode on the ESC (ex 70%). If you do that, it is important to monitor the ESC temperature since some ESC will react by overheating.

Good luck


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