triboom long raneg escort spitfire

[eatthis]

iv thought abouth mounting the wings on the top of the outer fuselages instead of the bottom i might not need any anhedral on the inner winner wing at all if i did that
im still sleepy and cant get my head around point b lol what do you mean by it?

[Old Wombat]

b. Also, if you move the existing wing root to the outer edge of the fuselage & only shim the inside, this will give you a good wing root out from the boom fuselages & bring the inner root in flush (hopefully) to the boom so that it doesn't stick out & look out of place when the dihedral wing stub is connected. (You may want to think about angling down the central tub wing-roots, too, so they match the wing stub angle.)

OK, the fuselage at the wing roots is narrower (even if not by much) than the fuselage higher up. By ensuring that the outer cuts line up against each other this will leave you with the full wing root out from the booms & you will only need to shim the inner side of the boom fuselage to the full width. Also, as you have effectively moved the whole wing root outwards there is a smaller section of wing root protruding in from the boom, thus meaning less work blending the new inner wing stub into the boom &, therefore, less drag.

Angles in the wing create drag, the more bends the more drag.

The alternative to what I have given you in the previous post is to line both inner & outer wing root sections with the boom fuselage & have a (relatively) straight wing (this would be my preferred option as there is less work involved). The final result would look a bit more like a P-38 Lightning but, still, quite unique.

Also, just to be a pest, don't forget that the wing roots (as they are are designed to) angle the wings slightly upwards but a bit of sanding should fix most of that & a little angling of the inner wing stubs should be easy enough.

I would draw some pictures of what I'm trying to explain but I'm 4,300 km away from my printer/scanner at the moment &, effectively wont be nearer to it until mid-June.

Perhaps someone else could assist? Please?



Guy

PS: Just thinking about this.... You might consider keeping the dihedral of the existing wing roots on the booms & simply angle the central tub wing roots down to match what already exists coming up from the booms! (Much easier!) I'd still raise the wing roots up to about the mid-line of the booms, though.

[eatthis]

i can use a flat centre wing now and sit the centre fuse on top of it this will raise it

[Tophe]

Is the centre fuselage still the same, for the cockpit? it looks like a bubble-canopy one, from another kit?

Old Wombat: I am willing to draw everything (all versions, not the final choice of eatthis only), but it is hard to understand, sorry.

[eatthis]

i couldnt really understand him either lol
the front is a drop tank (bloody usefull things for a whiffer) the main fuse is a mk22 spitfire low back with a bubble canopy

[Tophe]

Thanks for these explanations

[eatthis]

basic layout will be this

the elevator will be full width between the outer fuselages im not sure wether to extend it to the outside or not (atm im thinking no)

[Tophe]

Simplified sketches.
I'd like to add Old Wombat's ones, of course.

[Go4fun]

I like this last design change. More 'clean' air for the rear prop and a better view for the pilot.

[eatthis]

number 3 is nearly spot on fella

the nose is longer and the whole centre fuse sits a little further forward

i might alter my nose a bit yet anyway lol

[ericr]

number 2 has something special, I like it

[Madoc]

Eatthis,

You might bear in mind the thrust line of your center engine.  Putting it significantly out of line with the other two engines might make handling the bird a tad... problematic.  Putting the cockpit higher than the boom fuselages though would enhance the visibility from the office though.  While fairing the difference between the lowered engine and the raised cockpit might be more of a challenge it could also add the look of the bird.

[eatthis]

Eatthis,

You might bear in mind the thrust line of your center engine.  Putting it significantly out of line with the other two engines might make handling the bird a tad... problematic.  Putting the cockpit higher than the boom fuselages though would enhance the visibility from the office though.  While fairing the difference between the lowered engine and the raised cockpit might be more of a challenge it could also add the look of the bird.

il take that on board fella il see if iv got the prop clearence to drop it

[Tophe]

The Bratu 220 did fly http://forum.avionslegendaires.net/viewtopic.php?f=3&t=4902 with engines at different heights. Maybe other ones too... What's the problem about them?

[Madoc]

Tophe,

Different center of thrust lines for the different engines.  The Bratu 220's were all at least aligned on one plane, the vertical in this case.  Having those different thrust lines makes things more complex for matching the center of gravity with the center of lift with the center of thrust.  Trimming the bird out would also be more involved as would any weight changes as the aircraft draws down its fuel or looses its payload, etc.,.  Not impossible, just more difficult.