same here, table is kind of full with this monster, B-52If this is a 6 month contest for FFE or something I will enter a dash 8 with Alaskan airlines paint. Cant start this till 2019 though
will do.Take your time and have fun!
King air is mine unless you want to join me. I also might do a decathlon or T-28I am in. Deciding on what to build. Maybe a super cub, maybe a king air. 😀
The Q400 is nice plane although the wing area compared to the fuselage is ....er.....modest.
View attachment 116229
FlyBe colours and built extra light.
Hand launch and belly land. Keep the wings level at touch down and the props don't (quite!) hit the ground.
@Chuppster @DamoRC and anyone here, the Gulfstream has the weird wing tips pointed up, I've read they helped to cut drag, so when doing two such wings, will there be even less to zero drag or what will happen and yes it will look like a biplane. I got the fuselage setting with the glue in the creases to hold the folded shape.
interesting.By my understanding, the winglets on the tips on a lot of civilian aircraft help reduce drag by cleaning up the wingtip vortex created by air rolling off the edge of the wing. I'm not sure they help much on stuff as small-scale and - dare I say- crude as our DTFB airplanes. They would not lower the drag to zero, it's mainly just an efficiency thing to get a little more speed and range out of an airplane that's made to cruise.
@Chuppster @DamoRC and anyone here, the Gulfstream has the weird wing tips pointed up, I've read they helped to cut drag, so when doing two such wings, will there be even less to zero drag or what will happen and yes it will look like a biplane. I got the fuselage setting with the glue in the creases to hold the folded shape.
Winglets are a tricky little subject. Basically the reason that heavier aircraft have them is because of their excessive wake vortexes. Be cause of the way that wings make life there will always be a higher pressure below the wing than there is above. This works fine and dandy mid span because you won't get any "spill." Out at the wing tips the air want to move from the area of high pressure to the area of low pressure (bottom to top) and air on the bottom of the wing will slip around the wing tip creating a tornado like wake which can extend FAR behind a heavy aircraft. In ideal conditions a heavy aircraft may leave several thousand feet (there are even a few documented cases of nearly 10 miles!) where the vortexes can have an effect on other aircraft. These vortexes also cause drag, which is where the winglets come in. The flared tips that you see on most modern airliners and a lot of new business jets act as a fence for the air trying to spill up and over, thus preventing vortex drag and keeping air cleaner for other traffic. In terms of aerodynamics, they really don't do as much as you'd think though. Winglets only really help to improve fuel efficiency, and even then it's only 2-4% total savings.
Now, onto biplanes. Biplanes get a weird thing called interference drag. The closer the two wings are together the more the design will suffer from this effect. Biplanes are great for retaining stability at low airspeed, but they take a massive aerodynamic hit because of the extra structure needed to support the extra structure. In addition since a lot of drag comes from "induced drag," or drag that is a direct byproduct of lift an extra wing will only increase your total drag, regardless of winglet design.
What you may want to look into is a box wing design, which is a promising little development that should cut wake vortexes to the bare minimum as well as give you that kind of biplane aesthetic.
Good luck with your build, take your time and you should do just fine.
Just as a general rule of thumb, as you increase lift you proportionally increase drag. Airspeed is in inverse square to power. If you want to go 4 times as fast you need 16 times the power. I do have a little bit of a background in aerodynamics, so if you have any other questions you can drop me a line.
Winglets are a tricky little subject. Basically the reason that heavier aircraft have them is because of their excessive wake vortexes. Be cause of the way that wings make life there will always be a higher pressure below the wing than there is above. This works fine and dandy mid span because you won't get any "spill." Out at the wing tips the air want to move from the area of high pressure to the area of low pressure (bottom to top) and air on the bottom of the wing will slip around the wing tip creating a tornado like wake which can extend FAR behind a heavy aircraft. In ideal conditions a heavy aircraft may leave several thousand feet (there are even a few documented cases of nearly 10 miles!) where the vortexes can have an effect on other aircraft. These vortexes also cause drag, which is where the winglets come in. The flared tips that you see on most modern airliners and a lot of new business jets act as a fence for the air trying to spill up and over, thus preventing vortex drag and keeping air cleaner for other traffic. In terms of aerodynamics, they really don't do as much as you'd think though. Winglets only really help to improve fuel efficiency, and even then it's only 2-4% total savings.
Now, onto biplanes. Biplanes get a weird thing called interference drag. The closer the two wings are together the more the design will suffer from this effect. Biplanes are great for retaining stability at low airspeed, but they take a massive aerodynamic hit because of the extra structure needed to support the extra structure. In addition since a lot of drag comes from "induced drag," or drag that is a direct byproduct of lift an extra wing will only increase your total drag, regardless of winglet design.
What you may want to look into is a box wing design, which is a promising little development that should cut wake vortexes to the bare minimum as well as give you that kind of biplane aesthetic.
Good luck with your build, take your time and you should do just fine.
Just as a general rule of thumb, as you increase lift you proportionally increase drag. Airspeed is in inverse square to power. If you want to go 4 times as fast you need 16 times the power. I do have a little bit of a background in aerodynamics, so if you have any other questions you can drop me a line.
hey, on the engines, what would two prop motors do on the same area where the usual EDFs, would they work being that far back?
awesome. that is very interesting to learn.So long as the aircraft balances they should work fine there. It will actually be much more efficient if you use props.