Plane Print Seagull

Simon, do you have any idea what the solvent is in UHU-Por?

The UHU POR web site suggests petrol can be used to remove smeared POR stains and to clean brushes. This assumes the surface concerned resists petrol!
To be honest I have never tried it. I have found on a smooth hard plastic surface POR can be simply rubbed off the surface with your finger, at least within the first few days.
POR does eventually (years) degrade in sunlight and goes yellow.

I've managed to put a few parts together

Not easy to see against the light, and

The elevons are using TPU filament, you can see how floppy they are, they're hanging under their own weight. The off-white parts are LW_PLA, all the rest is PLA single wall print.
I hope to have a weigh-in tomorrow.

Klippy
That looks very impressive to say the least!
I am a bit envious.
I still think it looks like a lot of plane for a 40 mm EDF, no matter how powerful it may be!

I 2nd the motion about that being impressive. What is the wingspan of the beastie?

You must have managed a couple of longer electricity-on periods to manage to print some of those bits....

And goodness those are seriously large ailerons - what kind of servo can shift that much surface area?

Ailerons - a big surface moving a small amount is just as effective as a small surface moving a long way - and is less liable to turbulate and stall!
Mechanically - inside hole on the servo arm, and outside hole on the contol horn gives most leverage - but less movement for a given servo movement.

Remember on the Plane Print Seagull they are 'elevons'. There is no elevator. Those surfaces have to be large to provide any degree of pitch control with the surface so close to the line of the CofG. It is in effect a flying wing design.

My own view is they might have done better to have used inboard elevators and outboard ailerons but the configuration they use certainly flies - so what do I know.

Jon said "What is the wingspan of the beastie?

You must have managed a couple of longer electricity-on periods to manage to print some of those bits....

And goodness those are seriously large ailerons - what kind of servo can shift that much surface area?"
Wingspan is 1,500mm
I had all the parts printed prior to starting my upgrade which has taken far longer than anticipated.
They are 4.1gm servos, EMAX, ES 905, 800gms/cm, Digital with plastic gearing.
You only need high torque with speed and high rates of deflection. My guestimate is that 2.5gm would have been sufficient.

I managed to weigh the airframe yesterday, 297gm. What is worrying is there's a weight differential between the wing halves, 80gm and 85gm. I'm still fettling, I'll probably only get to fitting the electrics next week.

I had similar on my Depron Seagull but it only took 1.4 grams of lead pushed in at the wing tip. The tip is a long way out!
Given you were working from Plane Print's files you can be pretty sure the wings will be aerodynamically identical so a simple mass balance should be fine.

I'm not surprised since many of the wing parts were during the 'suck it and see' phase.

Not much done lately, at the moment our load shedding is 4hrs on and 4 off!
I have done a bit of painting.


That's stalled, waiting for some matt grey.

Is that 'tail' on crooked, or is it a funny camera angle?

Eric
On the Plane Print Seagull the whole tail assembly is the rudder so its angle entirely depends on a servo.

Eric wrote: Is that 'tail' on crooked, or is it a funny camera angle?

Already answered by Simon, the black dot you can see in the thrust tube is the hinge point.
Going to town tomorrow so hope to get some matt grey, load shedding permitting.