A Useless Geek's blog View Details
Archive for July, 2009
Posted by A Useless Geek | Jul 25, 2009 @ 07:28 PM | 7,765 Views
So, I'm building up some Yardarms. I already have one guy who wants one for sure, and I have a target in mind for another one. There really should be some spares around as well to cover breakage.

While I'm building these things up I am going to test out some longer wings and such. Thusly, the Longarm, as seen here:
Posted by A Useless Geek | Jul 14, 2009 @ 04:32 PM | 7,332 Views
The 6mm Simple Sister has flown so well that I decided to make the next version a 3mm lightweight copy. I'm looking to knock a good 50-70 grams off of the original plane. With any real skill I can get the AUW below 100 grams. That wold be quite an accomplishment for a four channel plane; we'll see.

To start with I am using 3mm Cellfoam 88. The stuff I had on hand is too narrow for a single piece wing, so I had to make two pieces that join together down the centerline. Each wing got a delicate angle trim along the wing root to form the dihedral angle.

I spot taped the wings together on the bottom side, then taped a solid strip along the top of the joint. Flipping the wing assembly over again I removed the spot tape and weighted the wings down on a flat surface. A long piece of clear packing tape stretched down the bottom of the centerline makes the wing joint solid and stiff, preventing any bowing of the wing assembly.

Flopping the wing assembly upright one more time reveals a V slot down the centerline. Gorilla Glue goes into the slot and a piece of 3.56mm CF tube goes into the muck. I weighed down one wing flat and supported the opposite side at the correct angle, making sure that the wing was straight as the GG cured.

Stay tuned as I get this puppy completed....Continue Reading
Posted by A Useless Geek | Jul 01, 2009 @ 06:33 PM | 5,925 Views
I have mentioned the Trashmaster a number of times but never actually blogged about it. Soory, eh? Here's where I put the pics:

Posted by A Useless Geek | Jul 01, 2009 @ 12:16 PM | 5,988 Views
So, I wanted to do some slope soaring. I figure, if the wind isn't gonna die down then use it to my advantage. This is the same kind of reasoning that leads me to bring a kite to every rocket launch. I'm gonna fly SOMEthing no matter what, y'all. Hence, the Whitewash. Finely crafted from the best $8 glider I could find at the LHS, this plane is my attempt to fly slopes in the wind. Heh.

First off, let me tell anybody else who thinks they can save a few bucks by building from a cheap styrofoam glider as a base: you are wasting your time and effort. (Not your money, but everything else, pal.) There's a reason why those glider feebs put all that time, effort, and money into their gliders. Even stuff like the Easy Star and Upstar and junk like that is far superior to anything you are going to do from scratch unless you apply some real science, and then it isn't a "quick" nor "easy" build. And after all that effort and time you still end up with exposed control rods, delicate structure, and mediocre performance. Blech.

The Whitewash was supposed to be a quick 'n' easy slop job. Surely, thought I, this will be a simple exercise in getting a glider set up to use some R/C control surfaces. What's the Big DealŪ? Well, just getting the thing to stay together long enough to survive testing is a chore and a half, but making it actually work in a stiff breeze is another level altogether!

The wings want to come off at the slightest provocation. No matter how...Continue Reading