Aileron questions from newbe

[cruzer]

Hi all,

I am new to the SC, I have a SC LP RTF. I would now like to add Ailerons.

I am fairly confident in my understanding of the installation process ( thanks to all for the very good information).

My questions are round the electronics setup.

this is what I understand i will need in-terms electronics.

- a 4ch+ TX and Receiver. Any suggestion, I any leaning towards a spek.dx5-6.
-Servos X 2 Suggestions? size, type ?
- lead extensions for the Aileron servos
- I have read about the need for a brushed speed controller, will I need this with the LP version?

what am I missing? Any advice on setup and hook up is very welcome.

Thanks

[Dillzio]

A 4ch receiver will do the job, but if you have each aileron on a separate channel you get some computer programming options that you don't have if they're on the same channel. These allow you to program aileron differential, and if you find one of your ailerons has more travel than the other you can compensate by adjusting the servos travel/endpoints.

You want 9gram servos with 1.8kg (or more) torque. I went with the Corona 928BB servos and I'm quite happy with them: www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=10344

As you mentioned, you'll need servo extension leads, and if you're running both aileron servos off the same channel you'll also need a servo Y cable.

Yes, you will need a brushed ESC if you want to use the stock motor. This one looks pretty good: www.hobbycity.com/hobbycity/store/uh_viewItem.asp?idProduct=9090

Advice on setup? Well check out videos on youtube for how to install the servos into the wings, I made a hot wire cutter out of some copper bonzai training wire that I put in a soldering iron. Draw an outline of the servos, put a mark on the cutter for your depth, and cut out the holes. Cutting them out level can be difficult, it took me a few tries - best to cut out not enough rather than too much cos you can always cut out more if you need to. A couple of my servos ended up being about 1mm too deep, so I just added some double sided tape to the bottom of those servos to lift them up a tad.

To stick the servos in the wings, I used super glue (CA glue), but first I wrapped the servos in sticky tape to make removal of the servos easier/possible. Use normal super cub pushrods cut to size, they're the cheapest available. I tried parkzone stryker pushrods, thinking they'd be more heavy duty, but they're not. If anything, the stryker pushrods just have less threads on the end to adjust the linkages. I recommend mounting the pushrods to the servos with Dubro EZ connectors, gives you an extra point of adjustment and saves you from having to put Z-bends in the pushrods.

You will also need to replace your elevator/rudder servos, as they are only compatible with the stock super cub receiver. I've used the same Corona servos, even though they're a little too small for the mounting holes. To make them a tight fit, I added a couple of cut-down popsicle sticks on the back of the servos, and one layer of double sided tape. I kept the covering layer on the double sided tape so it only stuck on the servo side, the tape was just used for a bit of padding. I also used a layer of double sided tape as padding between the servos. With this arrangement, the servos are a really tight fit and won't budge. Even though they probably didn't need it, being such a tight fit, I stuck them down with double sided tape too.

[cruzer]

thanks Dill

Why does the installation require a ESC?

[killioughtta]

Jul 3, 2010 20:52:27 GMT 1 cruzer said:

thanks Dill

Why does the installation require a ESC?

You will need to replace all electronics except the motor including ESC, servos and Rx/Tx.

[Dillzio]

Something to add to my tip regarding using dubro EZ connectors and stock pushrods. When the screw on the EZ connectors is done up all the way, it barely grips onto the pushrods. It seems to grip OK, but the pushrods can slide if enough force is applied to them. This is a sure fire recipe for a disasterous maiden flight.

The easy solution is to slide some thin heat shrink on to the pushrods, spread some super (CA) glue on the end of the pushrod, slide the heat shrink over the end where the super glue is, and then shrink the heat shrink with a lighter. This will make the end of the pushrods thick enough for the screws to get a good grip on them.

[Dillzio]

After just putting the heat-shrink on the pushrods myself, I've found another complication. With the heat shrink on them, the push rods then become a little too thick, just great huh?

You just need to file down the heat-shrink a little with some fine sandpaper, lube it up with a little spit, then you can get it into the hole. At least it's such a tight fit I can rest assured that the push rods will never slip.