In could early morning, 2 x 280LM LED light visibility was 1,700m.
Did test in Sunny mid afternoon flight to see the difference in mounting looking back and looking down.
Results are;
1. Looking back – Only 600m as max. visibility. 1/3 of cloudy early morning flight
2. Looking down – Only 130m visibility due to light spreading angle (120degree)

With this result, I’m planning to make 3 x 280LM (or 4 x 280LM) set to see more visibility in sunny daytime flight.

Timeline is;
0:00 Weather condition – bright and less cloud
0:26 Mounting 2x280LM LED + 750mAH battery (total 27g)
0:42 LED light looking back
0:50 Take off
1:19 FPV
2:40 604m D. Longest visible distance (in cloudy morning it was 1700m)
3:05 Auto RTH
3:18 2x280LM LED light – looking down
3:27 Take off
4:04 FPV
4:49 Max. visibility at only 130m D. Yaw turn
5:07 Looking down taking off point
5:47 Max. visibility only at 130m D, Yaw turn
6:16 Auto RTH
7:38 Landing pad detected at 4.5m H
7:55 Landed on the pad

свернуть