RE: GP Extra 300S - Questions
With mine I used the digital mini hitec on ailerons & elevators, and a 5625 on the rudder all on 6v. I got mine down to 7.3lbs This plane flies best light. Cut weight anywhere you can. I took my fuselage quite thin. There is a thread here detailing where to cut the weight from. AdrianM perhaps? With the elevator halves you will want to cut 3/4" to 1" of the tips of the elevator halves & stab, add the cut amount to the cord of the elevator. Move the hinge line forward on the elevator about 1/2" and build the counter balancers hidden like a funtana. It will reduce the sensitivity of the elevator. The stock one is quite sensitive. Enlarge the rudder with a counter balancer sized like a 330. And bring the ailerons in at least 2 bays. Keep in mine moving the ailerons in will muchly improve the hover it will also make landings a bit touchy. Be care full this bird likes to drop a wing tip close to the ground.
Watch the down thrust. when I built mine it only had 1/2 degree and it needed more like 1.25. The first landing was very difficult floated forever on 1 click of power due to the up thrust. I had to get close to the ground and then kill the engine to get here down. Once I fixed the down thrust landings were awesome!
This plane does the absolute BEST lomkavecs I have ever seen.
I powered mine with a pumped Saito 100. The first 30 flights were boring as I was still burning in the engine on 15%. Once I switched to 30% heli fuel and put in a 15-6. WOW!! 10 foot roll out and straight up like the shuttle. Completely unlimited vertical. Pull outs on hovers are great!
Makes ure you beef up the landing gear mounts. The stock setup is garbage and won't survive any hard landings. The beef up I did took the abuse of droping the the plane from 3 feet in the air. I slowed up too much on one landing and she droped... Only had some mildly bent gear. Watch out for this and don't let her slow up on landing!!
I still fly mine from time to time but I'm now flying a 50cc extra 260.