Hello my plane is tractor type and I want to hand launch with throttle set to 60% before launch it.
I want motor started before hand launch.
How to setup takeoff mode for that? this for have the good behavior ?
Hi kuspower, have you looked at Takeoff mode in the documentation. Perhaps TKOFF_THR_MAX is the setting you are looking for.
On all my planes (single pushers, twin tractors), I generally takeoff using Auto mode. The process is that I shake the plane to start the motor and only release it some moments later. Key points:
- Be absolutely sure that your hand and your prop(s) will not intersect during this operation. Exercise extreme caution.
- I like to have the motor spool up over a few seconds. Like 3 or 4 seconds. That gives me a chance to judge that all is well before doing the throw. So, shake the plane and do the 1001, 1002, 1003 count. If your launch depends on full power, be sure you aren’t rushing the throw.
- On a small plane (e.g, sky-surfer) you can throw early w/o problems.
- On a heavier plane that has a propensity to dip (e.g., strato-surfer) flaps are helpful AND/OR you need to be sure you have reached full power and do a good throw (straight line or a tiny bit up.
- On my twins (converted strato-surfer or Clouds), it’s really more of a push than a throw. Two hands for sure with one hand pushing the tail. These planes feel like they want to rip out of your hands and the hand on the tail allows you to push the plane with just a bit of upward angle. You probably want about 10-15% nose-up pitch. Again, the most important thing is to count so that the plane has hit full throttle before you release and push.
60% might be fine too, but I’d start with 80 or 90 at a minimum. If the motor is fully spooled prior to relase, I have never noticed torque impacting the roll axis.
There is no special setup to achieve this. Just holding onto the plane for at least the amount of time you configure for the motor slew rate.