1200mm Dragonfly

Do Dihedral & Rake not BOTH affect roll stability?
So if I have some rake does this not affect how much dihedral I need?
Thats why I mentioned it.

Magpie
I am not sure of the problem with top hinged ailerons on a tapered wing.
My Airbus A350 has a highly tapered (& swept) wing
This gives an idea of its big difference between root and tip.
 
 Nevertheless its ailerons are top tape hinged.
 
Of course the aileron has to be tapered to match the wing.
Am I missing something?

Wing sweep can increase roll stability which is why some transport jets with high wings and big fuselages have a some negative dihedral to limit the stability and also to improve the handling characteristics. 

I learned today that the wing tips tilted up at the end increase air efficiency and in jumbo jets fuel efficiency. You're turning me into a nerd on this site

To be fair designing up turned tips is complex as the aerodynamic advantage to the wing has to be balanced against the extra drag the extra tip causes. In practise the advantage is very small so it only make a significant difference to long distance airliner flights where keeping up the speed and saving any fuel is worth the trouble.
I notice on the latest Easy Jet 737s make use of the tip by painting "EASY JET" in big letter on the inside of the vertical surface just to remind any passenger looking out of the window who is flying them.

Don't worry about being a nerd I have been a "fact nerd" for a very long time!

I'm going to go for 4 degrees, maybe a little high but it means if I'm panicing it means I can take my thumbs off the sticks & cross my fingers.

I'm going to hand-cut the ribs.
I'm still mulling over getting a laser cutter.
 

I don't think it includes a honeycomb table, buying from Aliexpress is definitely Caveat Emptor.
It uses small spacers to set the height above the material. There's a review on Youtube where he does a matrix of power/speed tests.
At 300mm distance vibration from walking across the floor might upset it.

I've ordered the Atomstack 10W laser cutter. The next problem will be where to use it. In the garage will it set off the smoke alarm?

While I had the 4.3g servos I printed holders for mounting them in the tail.
 
 

Nicely done servo holders.  And that weight at the tail - what are you using to compensate for that in terms of COG?

In Cura the weight of the holder came out at 4g, on my scales it weighs 3.2g.
I tweeked the design & on Cura it came out as 3g, on my scales it weighs 2.65g.
I could reduce the length from 20mm to 15mm, on Cura this gives a saving of 1g.
The balsa servo holder for my Buzzard weighs 2.7g.

The 4.3g servo weighs 5g.
The weight of my uncovered tail is 37g.

I've got a nice long nose to hold the battery which should balance it out a bit.
 

 

For all you anorexics out there my servo holder now comes in at 2.0g. on Cura & 2.15g. on my scales.

Two servo holders work oot at aboot 20,000 g.mm.
The battery works oot aboot 36,000 g.mm.

The uncovered tail itself is aboot 15,000 g.mm.

I know I am a bit reactionary buy why use a servo holder?
I just glue them in.