Photos of my prototype stages for my own fugly jet foam board airplane.
Specs: (So far!)
Length = 31.5″
Span = 40″ (2×20″ Armin wing panels (Experimental Airlines))
Main airfoil chord = 6″ (actual chord is 7.5″ with1.5″ ailerons)
Wing area = 290 sq. in.
In the mail; a 520W EDF system 64mm EDF with 45A ESC
Real important here to pay attention and make both wing have as close to identical as possible.
So prototype #2 was made with black foam board from Dollar Tree.
Rear taper was 10″ front taper 7.5″ Conventional tail type. I moved the wing back to 10″ unfortunately Ed’s Fugly Jet has the wing back another inch from that. I should have set it 11″ back. Proto #2 is running tail heavy even though I moved the elevator servo to the back of the wing. The Receiver is also behind the wing. I also made the tail surfaces too large so even more weight to cause it to be tail heavy.
To fix the tail heavy I am going to move the RX and Elevator servos forward and cut down the tail surface sizes. I moved the heavier fan unit forward. But it could be moved even further forward. I used a different fan mounting method than Ed did. I built a 3″ tube 1″ long that slides into the fuselage. I glued that in place to hold the fan duct against. I glued 3 corner pieces into this to seal off the open corners. I built another one to slide in behind the fan around the duct. I glued this one in also. The problem is that you still cannot remove the fan for maintenance or repair. So next time I am going to try securing the rear piece in with a couple of zip ties. Then I can cut the ties to work on the fan unit.
Always, and I mean always secure anything that is in front of that fan unit. I did not secure the 3S 2200ma battery. The fan sucked it back and at 40,000 RPM made short work of the Balance Connector before the wires broke all 5 blades out of the fan. We looked around for quite a time trying to find the balance connector. We finally discovered the 3/32″ and smaller white flakes of plastic that were all that were left of it!
At least the fan unit I chose is inexpensive to find replacement parts for. $3.74 for fan and duct from Hobby King, I bought 4. So I have replaced the connector and am waiting for the replacement fan units to come in. I will have to replace the duct as it is pretty badly scored. That duct can then be used as a mock up for my next ducted fan project.
Dug out the Sony HandyCam with 30GB HDD and 40x optical zoom. All charged up. So when I get the parts in and everything moved it will be time to learn how to post video to YouTube.