06-09-2013, 02:02 PM
Took my new World Models Extra 300 EP up into the air on Saturday, and while landing, I was about 1m off the ground and flairing in when it suddenly dropped vertically onto the wheels, bending 1 strut. Model weighs about 1.8kg, 1280mm wingspan. (Produce Specs said 1.5kg.)
Had it powered by Turnigy G25 710kv (already had motor & bought plane to utilise it), Turnigy plush 60amp ESC, Turnigy 4S 3300 mAh 30-40c battery & 11x7 APC prop.
I believe the bigger than necessary power train is the extra weight & resultant stall.
Ecalc says 3s with a 13x8 APC prop should give me 1.13:1 thrust to weight. A substantial drop in thrust for saving 100g. I have a wooden 14x8 turnigy light electric prop which will give me 1.30:1 thrust but worried about ground clearance for prop on landing. Both Hobs in Hills & Ultimate are out of stock for 13x8s & HK dont sell them. Other props on ecalc dont seem to come up with the goods. This model has given me the heebie-jeebies from onset & looks to be continuing.
Any suggestions anybody?
Had it powered by Turnigy G25 710kv (already had motor & bought plane to utilise it), Turnigy plush 60amp ESC, Turnigy 4S 3300 mAh 30-40c battery & 11x7 APC prop.
I believe the bigger than necessary power train is the extra weight & resultant stall.
Ecalc says 3s with a 13x8 APC prop should give me 1.13:1 thrust to weight. A substantial drop in thrust for saving 100g. I have a wooden 14x8 turnigy light electric prop which will give me 1.30:1 thrust but worried about ground clearance for prop on landing. Both Hobs in Hills & Ultimate are out of stock for 13x8s & HK dont sell them. Other props on ecalc dont seem to come up with the goods. This model has given me the heebie-jeebies from onset & looks to be continuing.
Any suggestions anybody?