|Sep 29, 2013, 04:27 PM|
Megajets P-38 Lightning Build Guide
Megajets P-38 Lightning Build Guide
If you need to see the pictures larger, go online here:
Ebay seller - megajetspeed
A low cost and easy to build foam kit using basic tools, some hot glue, and light sanding.
Foam weight: 6oz
43 piece 5mm foam kit
The first in the Megajets WW2 line of foam aircraft kits. The P-38 is always a crowd favorite and this model won't disappoint. The amazing thing with this plane is that inverted flight is nearly identical to upright flight. Harrier rolls are possible and look amazing with the twin motors. The flight is predicable and graceful yet precise and maneuverable.
Recommended motors are: 900-1500kv, 10-20a, 2s-4s
Justgofly.com: 500T or 550T
Graysonhobby.com: V2, V3, Monster Jet, Mega Jet, Micro Jet
Eflite: Park 370
Great Planes Rimfire: Rim 300
Parts needed to complete:
- x2 Brushless Motors
- x2 motor stick mount/square stick(E-flite's Part #: EFLM1915)
- speed control
- 3-4 micro servos (hitec hs55-65ish)
- micro receiver
- .21 dia carbon fiber tube 29' long(optional second spar 16")
- hot glue
- packaging tape
- 1/32 music wire
- micro control horns
- Y servo connector
|Sep 29, 2013, 04:37 PM|
Locate the main wing, ailerons, horizontal stab and elevator.
Sand the lead edges of the horizontal stab and main wing, then for protection, cover the edge with packing tape.
Sand the ailerons and elevator like in pic #2 to make a hinge point.
Attach the elevator and ailerons using packaging tape.
Cut a carbon fiber rod 29" long and cut a channel in the main wing where its going to be. About 2.5" back from the front center point of the wing is good. That is where the CG is located.
After you cut the channel, tape over one side. Pour glue in the channel, drop the cf spar in the channel, then tape over it to smooth it out.
You might feel a need to carbonize the horizontal stab also. If you are using a powerful power system or plan on breaking speed records, we recommend doing this.
|Sep 29, 2013, 04:47 PM|
Main fuse and tail booms
Locate the fuse sides, fuse bottom, boom sides and boom bottom.
Using the notches and slots, glue the sides to the bottom parts.
Note that the boom side with the longer wing slot cut out of it goes toward the inside.
Make 2 booms opposite of each other.
|Sep 29, 2013, 04:56 PM|
Fusing the Fuse
You may want to mount your aileron servos before gluing this step.
Locate a spot on the wing not too close to the aileron and cut a servo shaped hole in the wing where the servo will go. Tape one side of the wing, pour glue in the pocket and drop the servo in.
Make sure your servo is perpendicular to the aileron and they are both mounted at an even distance on each wing.
Or cut a spot in the tail boom to mount your aileron servos and run the wires to the center. see pics #4, #5
Slide on the 2 tail booms to their respective slots on the wing and glue them.
Slide on the main fuse and glue it to the wing.
|Sep 29, 2013, 05:06 PM|
Horizontal stab and elevator.
Slide the horizontal stab onto the notches in the rear of the tail booms and glue in place.
Cut out a notch or notches near the rear of the tail booms for the elevator servo/servos to go. Pic# 2 You may choose to use just one servo for the elevator, or you can put one on both sides for a more even push/pull.
Respect your CG location at this point. Generally planes come out tail heavy before the battery is in. So mount the servo/servos as far forward as you can.
|Sep 29, 2013, 05:20 PM|
This kit is set up to mount 2 Eflite park 370 size motors using a universal stick mount. If you are using something different, sand or cut the bulkhead part so your motor gets mounted straight.
Start by cutting the 10mm square wood stick 4.25".
Mount the motor on the motor mount, then mount the motor mount to the stick.
Glue the front bulkhead in place in the tail boom.
Also glue the stick guides in place on the main wing.(they are the white foam in the picture)
Slide the motor and motor mount stick through the hole in the bulkhead and between the guides on the main wing. Your motor should appear to be mounted on a straight thrust line.
|Sep 29, 2013, 05:22 PM|
Locate 2 boom tops.
The weak spot on the plane is right where the front of the rudders meet the booms.
You might want to run some more carbon fiber to the back of the booms to reinforce that area.
Run all your wires to the main fuse and hook it all up to make sure you have correct motor rotation and that everything is working correctly.
Glue on the boom tops.
|Sep 29, 2013, 05:30 PM|
Finish up the model by gluing on the main fuse front and rear top.
We suggest gluing on the front top first.
Laminate the canopy pieces together and sand to shape.
You will know where to glue the main fuse top rear piece when you have the canopy on.
Put some velcro down in the main fuse area for your battery to attach to and check CG.
CG is 2.5" back from where the main wing meets the main fuse. The plane should balance on this spot to fly correctly.
|Dec 04, 2013, 08:17 PM|
Joined Feb 2010
I have been looking for a full fuse foamy P-38 this size. Not sure how I missed this before in my search (except I think it was earlier in the summer, so this one was not posted), but found it on eBay last night and ordered a kit. Price is very good.
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