Great flying warbird with some left torque issues!
I have heard that there are some left torque issues with the 4-Blade prop and it shows here. Also noticed that the nose was a bit heavy on take off adding to the problem. I plan on taking two blades off and trying it to see if that makes a difference. I also have the dedicated 2-Blade Prop and spinner on order to try later.
Also, noticing some difficulty with the elevator. Not on video here but when I am going into a loop, the plane falls off to the left or right and is not cleanly going around. I don't know if it's limber linkages or ??? I'm using a large JR Standard servo to replace the stock one so I know it's not a problem there. There is also no play in the linkages on the ground so I can only assume they are bending under load in the air. May have to replace or reinforce them.
Posted by RGS2010 |
Jun 21, 2010 @ 04:31 PM | 3,508 Views
Finally got to re-maiden the P-51 on Sunday.
I used Turnigy 3300 4 cell 20C battery and it fits perfectly into the battery compartment with ZERO extra room!
I replaced all 4mm red connectors with EC3's on ESC and on the battery. I rebound and checked the AR500 receiver with my DX6i. I use the extra aileron port so I don't have to use a Y-servo connector. The metal gear servos for the retracts, 380Max MG from Hobby King, lock out the gear great with 120% travel.
It was late afternoon with 5 mph steady winds, gusting to about 15 mph, coming out of the south straight down the runway. I lined her up and headed her down the runway until the tail came up and then full throttle into the air. The P-51 has plenty of power to get airborne in a hurry with the stock motor setup and that big 4-Blade propeller. I climbed out to about 100 feet and turned downwind. I had to add a bit of up trim due to extra weight of battery but only about 3 clicks. She tracked straight and true. Left turns took more effort than right turns, which were crisp. Aileron rolls were much faster to the right. Loops were slow and scale-like, very nice. It even flies upside down well with plenty of speed (and holding my breath!). I flew for about 7 minutes at about 3/4 throttle most of the way. It is a true joy to fly. I could "feel" the weight of this plane while landing. I had to go around three times before landing due mostly to the gusting winds. But, you MUST land with power with this plane. It has a tendency to drop the right wing if you don't...this is no glider! That being said, it flared nicely on the runway for landing. I won't be adding flaps.
Next time I'm going to take off 2 blades of the propeller and see how she flies on 2 blades and see how much more performance I get.
Posted by RGS2010 |
Jun 10, 2010 @ 11:12 AM | 3,206 Views
Yes the Corsair crash and the P-51 crash were on the same day! Some people just don't know when to quit. But, the T-28 flew great with three batteries through it. I flew with the stock 2-blade prop but I like the 3-blade PZ prop much better.
The wind was about 6 mph and coming slightly across the runway. The rudder on my P-51 was less effective than I am used to and so I had to "gun it" and get it in the air quickly. It takes off very quickly with that big 4-bladed propeller.
I was surprised at how docile the airplane handled in the air. It was even a bit sluggish. I can see why people have upgraded the motor. I made 4 or 5 circuits around the field to trim it properly and test out the retracts. All was well.
When I put down retracts for the last time and came in for final approach, I lost all power. Thank goodness that I had already almost flattened out the approach so when I lost power at about 50 feet, it glided to about 10 feet before losing enough airspeed to drop the right wing and hit on the bottom of the nose.
There was no damage at all! A little rash on the bottom of the air scoop but that was it. The power was still off when I picked it up although the battery connections were still intact. I believe it was poor connections with the 4mm bullet connectors. I had suspected them before but after one small problem with it, I thought it was okay. Wrong!
I have since replaced all connections with EC3 connectors and will report back on next flight.
P.S. After restoring power...even the retracts sustained no damage after a pretty hard crash. Gotta love those metal gear servos! Also surprised the stock landing gear took such a hard shot with no problems.
Posted by RGS2010 |
Jun 07, 2010 @ 04:24 PM | 2,822 Views
On Sunday (6/6/10):
I was out flying the Corsair on a balmy Sunday morning with fairly light winds. It was flying beautifully, as usual. I pulled out of a steep dive when the battery flies out of the compartment and falls to the ground. The Corsair kept going straight up for about 10 feet and then the wind took it downwind about 50 feet before nose-diving into the ground. Even though it landed on the nose, the motor was undamaged...even the little yellow nose cone was fine. The battery was also no worse for wear as it landed in soft grass.
The wing cracked in half and broke the fuselage where the wing connected to it. The damage was definitely fixable but I had too much trouble with the rudder servo always going out of alignment and having to take the tail off and recentering the servo and the wheel, so I decided to let it go to Warbird Heaven. I scavenged all of the electronics, servos, control horns, landing gear, motor and esc for another plane down the line.
I had just gotten new 1600 Turnigy batteries that fit snugly in the compartment. I got in a hurry and stuffed the wires too tightly against the door which I'm sure contributed to the crash. Pilot error was much more to blame for this incident than poor construction.