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Posted by yfl211 | Feb 28, 2015 @ 03:52 PM | 3,776 Views
Finalize. I gave it the colours of the glorious Belgian Air Force, of course I'd say.

It's not all ready yet, but did I beat the industry or not ?
This airframe cost me exactly about round let me count 12 euros, (for the wood, the filler and the glue). I have to admit I already had the shrink cover lying about, but even when you have to buy it, it would make 10 euros. The glue will serve for the next 30 aeroplanes and with the rest of the filler I'm going to plaster my garage. I started the build round Christmas and did very easy going a few hours per evening, not every day.

A nerd told me the dimensions are not exactly right, but I told him to get lost.
Another nerd wanted wheels, but do you know what I told him to do ?

The servo's I planted under the wings, on the outside of the fuselage. You can hardly see them like that and it's pretty handy to adjust things.

When the weather gets a bit cleared up I'm going to test this zipper; oh yeah, it's got a 70 mm EDF with a 10 blade fan and loaded up with a 2200 mAh 4 s lipo and a 50 A esc it runs on his belly along my garage floor, so It'll do when I throw it in the air, cross my fingers. Weight : exactly 1205g without the battery. Length : 1300 mm.
I'll keep you posted, people.
Posted by yfl211 | Feb 28, 2015 @ 03:30 PM | 3,455 Views
After you sandpaper the wood, fill it up and sandpaper again, you finally can add the tail section. Before hingeing on the flaps and ailerons, shrink cover the plane.
Make a hatch in the belly to reach the wiring and the fan. Just cut out a piece of the fuselage, don't be afraid, you can reinforce it with a piece of sheet or ply. The inner side of the fuse you can beef up with some foam cut in shape, because it will be flimsy, anyway not very strong. Make sure you have a firm grip on the fuse where the cg. is to be able to throw it in the air. You'll have to launch it like a javelin.
Posted by yfl211 | Feb 28, 2015 @ 03:23 PM | 3,356 Views
So when you're about to join the two parts it's time to have a careful look at your model, to make out where the nose points and in what angle the tail goes up. Support everything carefully, and then, rien ne va plus, glue it all together.
When that's done, you go along stripping the wood and covering the rest of the plane. You make "ears", which are the supports of the inlet pipes, and these "pipes" form the intake chamber and as such the fuselage of the plane. Let some space on the back or the belly to arrange the wiring of the servo's on the tail, which you're going to install next.
Posted by yfl211 | Feb 27, 2015 @ 07:08 PM | 4,968 Views
Time to put everything together .
Firstly solder long enough wires on the motor and lead them to the front part. Glue in the EDF unit. Make sure it's properly balanced and everything is mounted right. You normally don't have to meddle with it again, so just glue it in. Glue the sheet tube into the foam tubes, but use only a little glue. In a worst case scenario you can cut or tear the whole tube out from behind. But don't do that yet. We'll install a hatch in the belly as well so you can reach the fan and the wiring.
Secondly shrink wrap the wings. You can do them with varnish and woodfiller and paint to make it difficult, and end up not a lot nicer than the cheap china shrink wrap. But whatever. Put the wings together with something. I used an old Belgian number plate that well, got lost. It's stronger and thinner than wood, and its bendable to get the right angle of the wings. In case of the Starfighter, bear in mind that the wings stick out of the inlet pipes a bit lower than where you put them in the inner tube. So estimate it all a bit. (that's how I do it, you can use some mesure tool).
Posted by yfl211 | Feb 27, 2015 @ 06:44 PM | 4,933 Views
Start shaping the fuselage. You can try to bend the balsa, piece by piece, around the foam, but I just cut everything into strips and glued them on. It looks like a lot of work, but actually it goes quickly enough. Pin it all down and let dry for a night. Sandpaper. Fill the cracks with the filler. Sandpaper. You get a nice jet !
Posted by yfl211 | Feb 27, 2015 @ 06:36 PM | 4,870 Views
Make wings, rudder, elevator, flaps, ailerons from the balsa. Laminate to get 6 mm plate; can't be breached and very easy to hinge on and shape.
Posted by yfl211 | Feb 27, 2015 @ 06:17 PM | 4,755 Views
The sheet tube is the hind part of the plane; make the front part now. Cut that foam !
Again, practice makes perfect. Glue as many tubes together as needed to form the fuselage; take hollow tubes so you have a lot of space to fit in the battery and the electronics. I was glad to be able to place the battery here because the cg would have been way up front; we don't want to add led at the tail to balance.
Posted by yfl211 | Feb 27, 2015 @ 05:58 PM | 4,821 Views
What is needed are some foam tubes to give shape to the plane, so we cut out some 7-8 to start with. Not so easy the first ones, but practice makes perfect. The inner diameter should be approx. the diam. of the EDF unit. Make them a bit small-ish, you cut them out later to fit. The outer diam. you mesure along the plane where they are needed, they're going to have different mesures. It can all be loosely mesured; the tubes are going to be a frame on which the balsa is glued, so you won't be seeing them in the end. You cut them right as they are being installed. Wrap the sheet around the EDF unit to get the exact fitting tube.
Posted by yfl211 | Feb 27, 2015 @ 05:42 PM | 4,825 Views
The most important work about building is conceiving the object. I do that mostly staring at my workbench and the 3 sides picture, and this is what I came up with.

A jet is merely a tube, tip to tail. This tube has to have the diameter of the shroud in which the fan goes. To give the plane shape is a matter of having a material which gives you a margin to work with. For a small plane wood and foam is the obvious choice.
I decided to keep it as cheap as possible, as we used to do in the old days. Here's some foam I found on the street, filler to do the walls with, sheet (this is an old file of a deceased criminal), glue for windows (it musn't eat foam) and oh yeah, balsa planks 3mm. (4 of them).
My most principal tool is a potato peel knife (German quality!), a ruler, and a Dremel.
Of course you can replace all these materials by first class stuff that you buy in expensive hobby shops. But you'll notice it goes like this as well.
Posted by yfl211 | Feb 26, 2015 @ 09:22 AM | 4,522 Views
Hello there, good people.

I've been building my first jet from scratch, and I'd like to present it here. Because I'm proud of it, and as well for all the enthousiast builders who would like to do it as well but always were afraid to start one.
I'm brand new on this forum, though I'm flying r/c for some years now, and I was hoping you all could help me on my way a bit here, since I'm not really a computer wizard.
I've been building planes myself after having bought the usual stuff to learn to fly, and crashing along of course. So I still had some electronics lying about, which I liked to use for a Starfighter.
You know, a Starfighter ? Check this out, is there a more fantastic plane ever built ?
When I was a boy back in the 60's, these were flying over my head, banging through the sound barrier several times a day, reminding us that the Russians were at only 600 km away. The one in the attachment is on a roundabout now not far from where I live, so that's a good model to work around.
I probably would have bought a kit if there was something affordable on the market, but there isn't. So I decided to fabricate one myself, practically for free then. I tend to keep to my old fashioned skills, which don't extend much further than foam and wood. So don't expect any high tech stuff to make a record breaker; I'd merely present the build as a way for a beginner to fabricate a reasonably priced, relatively easy EDF jet. It's my first jet, so I'm going to reinvent the warm water along the way, but it's all part of the fun.

I chose it to be a tight fit for the boot of my car, that would be some 140 cm. In that view it will be practically in one piece, with no detachable wings or tail, just a hatch to the motor and a canopy for a lid to stow the battery. No wheels, because I fly over tall grass, and wheels are a pain anyway.
So there we go, but anybody knows how to insert pictures here ? Please ?

Ok, I think I have it...