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Hangar Aircraft Category Date Preview
David DuckettBerkeley Douglas F4D SkyrayBuild24-Jan-16 07:14
Views : 516
This one's also for him:-)
David DuckettBerkeley Douglas F4D SkyrayBuild24-Jan-16 07:13
Views : 538
For Julnik who asked about a canopy. A lot of work will be required before it's actually glued in place!
David DuckettBerkeley Douglas F4D SkyrayBuild23-Jan-16 17:24
Views : 456
David DuckettBerkeley Douglas F4D SkyrayBuild23-Jan-16 17:23
Views : 491
I thinned the filler and used a palette knife to apply it to the wings. It sanded smooth fairly easily so I did the same thing on the jet intake/fairing areas. This first application is to smooth all the sections together and the top and bottom sections will get it next. When all 3 sections are done the whole thing will get an application of filler. This will dry overnight until about 11 tomorrow morning when it should be warm enough to go outside.
David DuckettBerkeley Douglas F4D SkyrayBuild23-Jan-16 06:55
Views : 470
David DuckettBerkeley Douglas F4D SkyrayBuild23-Jan-16 06:55
Views : 435
The fuselage is about 4" diameter and the exhaust is about 3". Notice that the bottom of the fin/rudder is curved to fit that outline. I first glued one of the stringers to C to B and then from C to A. The problem is that at Point A it's paper. Each additional stringer is glued to its neighbor so all 120+ used are all glued together. That means that the original curve established is maintained lengthwise and allows control in placement of where the stringer meets the paper. The reason you can't do all that with one piece of curved balsa is because it's a compound curve. If you covered from A to C you would lose the curve. And with all the stringers involved being glued together it's quite strong which, by the way, is why I would never use 1/32". All surfaces will get filler and that means sanding so thin wood just doesn't work. Ever.
Hangar Aircraft Category Date Preview
David DuckettBerkeley Douglas F4D SkyrayBuild23-Jan-16 06:43
Views : 464
You probably know that balsa will bend more easily from A to B than from A to C and that it will not bend in both directions at the same time.
David DuckettBerkeley Douglas F4D SkyrayBuild23-Jan-16 06:40
Views : 522
I studied the plans quite awhile before starting and this is part of the reason why. This is one of several parts provided to cover the open areas.
David DuckettBerkeley Douglas F4D SkyrayBuild22-Jan-16 18:42
Views : 461
Temperatures in the seventies allowed sanding and the first application of filler.
David DuckettBerkeley Douglas F4D SkyrayBuild21-Jan-16 10:20
Views : 524
Fabricating & fitting
David DuckettBerkeley Douglas F4D SkyrayBuild20-Jan-16 20:47
Views : 468
Those gray things in the exhaust, called vanes, obviously would not be on a real jet but they align and support the rear of the model. The reason for using all those 1/16" stringers was to keep the opening as close to a circle as possible while gluing them to the paper. It's quite strong. You can't see most of what's inside now so painting it all black will effectively cloak it and all you'll see is a black hole. About a inch and a half of the outside from the rear will be painted a dark metallic.
David DuckettBerkeley Douglas F4D SkyrayBuild20-Jan-16 07:48
Views : 464
For Don: Berkeley also made a kit of the Beaver with a 48" wingspan. The ailerons and fin/rudder will be fabricated from laminations and will probably cause the plane to be tail heavy so the intakes will probably have to suck up some weight.
Page (9 in total) :  1   2   3   4   5   6   7   8   9  [ < Prev ] [ Next > ]