The flying monkeys got me...

Helis, Fixed Wing, RC Sailing

AMA 957918

Pirate Kid Skeleton by RadDezigns.

Monday, July 18, 2011

Getting Arrested...

As part of my foam rubber runway project, I wanted to create a simple cable arresting system that could lie on flat ground. This is what I have come up with. I have no idea if it will work, but expect it to work just fine on small foamies. When I incorporate it into the runway system I will likely use wire tent pegs to hold it down.


1 inch x 2 inch blocks cut and drilled to hold eyelets. These are the cable guide blocks.



My garage became the painting room. I painted both surfaces of the main board to protect the wood against moisture from the grass.



To make lines to show where the wires are, I placed 2 inch masking tape where the yellow lines will be. I then used masking tape to create the edges, then removed the 2 inch tape. I used the soft non-textured side of the foam mat. Its that 2x2 puzzle edge stuff for workshops or gyms.



Some extra masking and I was ready for spray paint. In the future I will use brush on paint and a roller. This took way too much time and too many coats to get it even.



The humidity got so high in the garage... I moved painted items to "the drying room".


I wanted to edge the yellow lines with black. I used a Magnum marker and a straight edge.



I would need a small block to lift the cables. I cut some scrap spar wood into 20mm pieces and used a glue stick to temporarily hold them on a piece of cardboard for painting.



Liberal coat of black paint from a rattle can. In 10 minutes they were dry and I plucked them easily off the board.



I cut the puzzle ends off the sides of the foam runway piece, leaving it on the ends to join to the runway. The black lift blocks are CA'd onto the foam. I installed the eyelets and then epoxied the blocks to the board. Originally I was going to have the eyelets facing up, but this lifted the cable higher than I wanted it, so I laid them on their sides (and used that Magnum marker to color the back), and came up with the lifting block idea to give me about 5-7 mm clearance.


For the larger arrestor hook, I took a picture hanger hook and broke off the nail end. I soldered it to a control rod using a torch.



I covered the hook and the soldered section with shrink wrap. The proximal end is a clevis attached to a backwards control horn, which is CA'd to a piece of scrap plywood also colored with that marker. To that i have attached a piece of 3M Dual Lock Velcro. This is attached to the plane. I also made a small one.



I don't have a small foamie so I put the arrestor hook on the camera Dual Lock on the bottom of my Eflite Alpha Sport 450. It will hang down... It may hang up on take-off from grass. I could rig a servo to release it, but I don't know that I plan to routinely land the Alpha with with arrestor hook.



The arrestor system in repose.



A soft spring (Home Depot) attached to a plastic wall hook secured to the board using VHB, with a thin bungie (Walmart craft section), running through the eyelet across the runway, and tied off on the other side. I alternated every other side  for looks and to keep it from being crowded.



Can't wait to see if it will work!

Next up, the long runway!

Sunday, July 17, 2011

Buddy box with my Buddy!

Luke and I hit the field yesterday, squeezing in a couple of flights between the rain drops before the thunderstorm came in. Setting up my two Dx6i as master and slave was so incredibly easy. When I read the instructions in the manual, I couldn't believe that was it. I connected a Radio Shack 3.5 mm double male ended stereo cable into each transmitter (tx), made sure the identical model and settings were on each tx, and figured out which was master and which was slave. I remembered that the slave (student pilot) tx was the one you leave off (it turns itself on when you plug the cable in). The instructor holds the trainer switch on when the student is flying, and lets go when he neds to take control. It was incredibly easy! Luke and I had a blast and now have an active way for Luke to fly without having to wait for an instructor pilot from the club to be present. Awesome!


Two Spektrum Dx6i and a double male 3.5mm stereo cable for $8 from Radio Shack.



Close up of my cable. Radio Shack's website shows molded ones for $8 in a variety of different colors.



The stereo cable is connected to both radios in the back.



The left is OFF and is the student's (Slave), the one on the right is ON and is the Instructor's (Master). I noticed if I turn the Master off nothing changes on the radio (it stays on), but I don't know if it changes the Master status.



Note that the one on the left is OFF, the right is ON, and the identical model is on both. The DR/Expo, Subtrims, everything, need to be identical. The airplane will adjust itself to the flying radio's settings. 

That's all it takes! A cheap cord, two radios and volia!


Friday, July 15, 2011

Stearman makes progress

I have done a lot of work on rebuilding the Stearman after her stall crash. The motor mount was crushed, but I rebuilt it piece by piece with CA and epoxy.


It came together pretty well, though some chips and pieces were missing. I supported the structure with pieces of balsa and ply, and installed the firewall and mount on the fuse using CA to get it into position, and epoxy to strengthen it.

The slots and structural support for the landing gear really took a hit.The fuse wall was crushed into the fuse where the landing gear jackets pushed into the fuse. I pulled the fuse out and filled it in as I could, using CA and epoxy. I couldn't get the landing gear plate completely flat. It had buckled a bit and I couldn't get any leverage to push it back. The plywood was bent, but not broken. I pushed it into place as well as I could, but its not perfect. The residual is that the gear pant on the right side doesn't fit flush, but it looks really good. I ironed in the new blue Ultracote. Looks really good!




I will install the motor and ESC and run a motor test. All that is left is to order and install the cabane struts, the upper wing carbon fiber support rod, the wing N struts, and the cowl. I will need to rei-nstall the weights to get the CG again, I suspect with some less to account for the epoxy in the motor mount.

MX2 Rebuild Continues

I am still working on the MX2. A couple of days ago I epoxied the ply firewall back together. Yesterday I epoxied the firewall in place and brought together with epoxy the shattered fuse. I had noticed back when this rebuild started that the fuse curved from left to right (right to left from the nose). I had been thinking about this for a while, and today I sliced the fuse at its thinnest point and wedged in and epoxied some dense styrofoam. This worked and the fuse is now aligned.


The angle is more acute when you look down onto the fuse. After the wedge its straight on.



The white wedge of styrofoam bends the fuse back into alignment.

I plan on filling all the holes and gaps with epoxy, sand it down, and paint the fuse one whole color. I may paint the bottom that bright green. I pounded the metal motor mount back into shape and will install it and the motor soon.

Tuesday, July 12, 2011

I suck at flying helis

Erazor went up. Erazor wouldn't fly backwards and kept going forward. Instead of trying to land Erazor, I tried to turn Erazor. So Erazor crashed. Hard. Yes, her CCPM was set up well, and aft elevator worked fine... until I needed it.


I am thinking I should take the EXI 450 back to a 2 blade flybar and not spend the money on a BeastX to fly it as a 4 blade just yet. Once I can fly them, then I will set up the 4 blade... because right now, I suck at flying helis.

Saturday, July 9, 2011

That sucking sound...

is me being pulled into refitting the POS MX2...





Geez. Don't know how I will get the motor off the mount. No sense trying to get a replacement firewall and mount from BananaHobby. But I may try...they randomly answer their emails. I really want to like this plane.

UPDATE: Emailed parts@bananahobby.com. we'll see what happens.

Friday, July 8, 2011

Cubby's got a new set of shoes!


Kenny Chandler gave me a set of landing gear that fits my Cubby's frame. I screwed it on, and put bigger wheels on her. Very cute, flies sweet, and can do touch and goes again! She is flying wicked awesome! I may sand down those rough spots and give her a touch up paint job. Maybe not, its part of her character!