GooberSB's blog archive for October, 2011 - RC Groups
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Archive for October, 2011
Posted by GooberSB | Oct 24, 2011 @ 09:50 PM | 6,515 Views
Went to the park today and flew my Champ, UM Polecat, and Mini Slinger wing. The conditions were just right.

I've read in the Polecat thread that the rudder doesn't turn the Polecat but that's absolutely untrue. I practiced turns using the rudder with a little up elevator, rudder and ailerons coordinated, and rudder only. At first my low rate for rudder was 60% but I gradually increased it until I got what I wanted. The final low rate for rudder = 90%, aileron=45%, elevator = 80%. Now it flies like a trainer haha. I'm flying it better than my Airfield T-28.

Anyway, while I was flying the Mini Slinger (it makes more noise than my scratchbuilt wings) a group of young children came over to watch. They looked to be from 4-8 yrs old. The oldest was a boy and he watched as I moved the sticks around. eventually came the dreaded question "Can I fly it?"

He had been very nice, observant, quiet, and not the slightest bit distracting - but I had to say no. I tried to be as nice as I could by reminding him that it's not easy to do and even dangerous. And I added that if he crashed it would cost me a lot of money. He was satisfied with that and didn't ask again. I do wish he could have though.
Posted by GooberSB | Oct 23, 2011 @ 10:41 PM | 4,552 Views
Alright. This is neither build nor rant.

Today it was fairly windy again. Great for soaring. I was outside flying my scratchbuilt 20" KESL wing to see how she performed. I had been flying for about 15 mins when I noticed a hawk overhead soaring in the breeze making lazy circles. So I circled around towards the hawk to see what it would do. It seemd to be curious but not threatened so it kindof stayed close to the wing but followed behind it. I thought that was cool but then I noticed two more coming over to have a look. Soon there were 3 hawks circling overhead slowly but clearly interested in my wing. After a few minutes the wind picked up and I decided to bring the wing in while it was still possible. The hawks left shortly after.
Posted by GooberSB | Oct 23, 2011 @ 10:17 PM | 4,598 Views
Failed projects so far:
16" David Wing
20" David Wing
18" Dead Simple Wing
Divinity Wing
SewSlow Wing
Air Hogs Titan bash

I've learned a lot from building these things even though they failed.

The first one I ever built was the 16" David. The electronics I used were too heavy, it was too twitchy, and I didn't know anything about expo and the magic of low throw rates. This was a mix that doom any build project.

I learned from this one that Kryon spray paint may be foam safe but it's still a terrible way to cover your foam. The tape sticks to the paint and not the foam. And spray paint don't hold on too well. Now I use a good airbrush to decorate my foam and spray adhesive to make the tape stick.

As for the 20" David, it was very fast but I couldn't get it to track straight ahead. It was very prone to deviate off course if left unattended. Not what I'm looking for.

The Divinity was my second wing build. If I tried it again today I'm certain it would do so much better than it did that day. My problem was I was new to scratchbuilding and had no idea how to do things like make a motor mount out of foam or plywood. I didn't know about all the various plastic mounts out there or triangle stock plywood. So my motor was barely glued onto the back of the wing. Whenever it came down with any speed and stopped abruptly, the motor maintained its momentum and would fly off. Of course, this was tearing the one layer of 6mm Dollar Tree readyboard....Continue Reading
Posted by GooberSB | Oct 23, 2011 @ 09:22 PM | 4,677 Views
So I've had several brand new Champs. And I've bought several fuselages to experiment with brushless motors. The stock fuse isn't suited for a motor that mounts from the back or front so you have to be creative when fabricating your own mount and installing it into the fuse. Mounting the servos required cutting away a little foam but the motor mount problem should be on an IQ test.

Of all the experimenting I've done on the Champ, I always enjoy flyng the stock Champ the best. Yes, the P-51 motor with a 5043 prop gives it more authority. So does a 5g Hextronik motor. But the scale flight characteristics, the docile and floaty flight disappears as more internals get replaced. I've since learned that when it's too windy to fly my stock Champ, I should just fly something else.

Mini Super Cub. There are some upgrades that should not be upgrades. Like the transmitter that comes with the MSC. Like the removal of the ACT sensors. Like a 2.4ghz receiver.

I also have 2 of these MSCs. One with the stock motor and another with a 24g blue wonder. I have one MSC that I outfitted with a brushed ESC, a HK DSM2 compatible Rx, 9g servos, and a discovery buzzer. No ACT, no cheap transmitter that is spring loaded to return to center. No sir. But the motor is stock brushed 180. And I use a 350mah or 500mah 2S battery.

The other MSC is similar except that I put a TowerPro 2209 or so motor in it. It balanced well since it's a heavy motor so I thought flight would be just...Continue Reading
Posted by GooberSB | Oct 23, 2011 @ 08:47 PM | 4,504 Views
Since I started flying rc aircraft with my son in January, we've gone through quite a few models. Taking the wrong path, buying cheap kits, having a great time and having some bad days too.

We live out of town on a 3 acre lot surrounded by other lots of various sizes. The 3 lots behind and adjacent are 10 acres so we have quite a bit of usable airspace to play in.

We started with a Champ (and keep going back to it) and a HZ Mini super Cub. Flew the Champ in a gym on weeknights and outside on the weekends. Even when it was snowing. Flew the MSC on more windy days. I flew it just today with a keychain cam for fun.

Then I got a UM P-51 for my son as he was getting very good at flying the Champ indoors. But I didn't realize how much different it would be. That didn't work out. So I got out an old SlowStick and we added that to our rotation. And an E-Starter later. The old EPS stuff just can't take a head on collision with a power pole, the wood pile, or the ground. The cowl area was pretty hollow after those. The E-starter is repairable if the damage is from the main wing back. The GWS firewall in these EPS planes is a 10mmx10mm hole in the nose. Once it's messed up you have to start adding your own materials to build it up again. I considered getting a replacement but it was too much work in the first place. After that, we tried a T-34 Mentor of similar quality. The motor was underpowered and not heavy enough to balance it. After a few crashes I put...Continue Reading