Right stick left and right doesn't do it ?
You can change the speed in orbit mode once you start it in its direction, quickly tap the right stick the opposite direction the H is traveling in and let the stick return to center. Each time u do this it will decrease the speed. If you want to increase speed tap in same direction to achieve desired speed or hold in that direction and will go back to full speed. This is similar to what I figured out for cable cam except you are using the right stick for orbit mode.
This is what I posted for cable cam previously :
This is what works for me.
After you set your waypoints try these steps.
1. once you get to your 1st point and push the left stick forward (away from you ) to get it started on its path it always seems to go 10-11mph in that direction .
2. Now if you want to slow it down tap the left stick back (toward you) Very Very quickly ALL the way back and letting the stick return to the middle without pausing.
Each time you do this it will slow down about 1 to 2 mph intervals. Keep doing this until you achieve your desired speed.
3. To speed up again to a desired speed reverse this process by tapping the stick briefly the opposite direction. If you want to resume speed right back to the 10-11mph just hold the stick forward a second or two.
4. At any time you hold the stick to long back towards you she will reverse direction. You can use this same process from step 3 to slow her down in the reverse direction but
the stick movement t will be the opposite direction. You must now tap the stick forward to slow her
down. If you hold the stick to long from center she will go in the opposite direction again.
Another thing I have noticed once you get to your last waypoint and she stops you can go backwards on thru each waypoint by pulling back on the left stick.
Once she gets back to route 1 again in reverse direction and stops you can again go forward again by holding the stick forward .
You can go forward and back anytime during the route by holding the stick off from center for a brief moment in the direction you want to go.