Showing off my scratch build own design plane before I crash it :-)

Mich007

New member
Hi all,

I certainly hope that doesn't happen,

but just in case here she is before her maiden .

She is a combination of 3d print, laser cut balsa, carbon fiber rods and solarfilm lite.
she is ready for take off. only waithing for good weather.

the only thing I still have doubts about is the launch speed, with 6kg force i get +/- 24km/h speed (tested With a bottle filed with water)
the plane has a bit more air resistance and needs a about 20km/h (according to the calculators i can find online)


The guideline I have found is that force should be approximately 5x the weight of the aircraft. The aircraft weight is 0.8 kg, the slider is around 0.2 kg.
so 6kg of force is maybe i bit height.

(i can only start the engine after the launch)
So i think 6kg should be good.
 

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Mr NCT

Site Moderator
Hi all,

I certainly hope that doesn't happen,

but just in case here she is before her maiden .

She is a combination of 3d print, laser cut balsa, carbon fiber rods and solarfilm lite.
she is ready for take off. only waithing for good weather.

the only thing I still have doubts about is the launch speed, with 6kg force i get +/- 24km/h speed (tested With a bottle filed with water)
the plane has a bit more air resistance and needs a about 20km/h (according to the calculators i can find online)


The guideline I have found is that force should be approximately 5x the weight of the aircraft. The aircraft weight is 0.8 kg, the slider is around 0.2 kg.
so 6kg of force is maybe i bit height.

(i can only start the engine after the launch)
So i think 6kg should be good.
That is very cool! I hope it flies as good as it looks. Get video of the maiden, please.
 

Flying Monkey fab

Elite member
I too hope that it flies as well as it looks.
I love your use of materials, picking what you thought would work best in each place instead of getting stuck on balsa or 3d printing. I want to make nice planes like that when I grow up!
 

Shurik-1960

Well-known member
The model is made by connecting the stabilizer to the keel using a flying wing. I made such a model out of a Whoosh. It is very difficult to spoil it: the classics are always perfectly thought out. If there are bends at the ends of the wing, the model will be more stable in flight.
 

Mich007

New member
First flight today, first attempt to get into the air failed, plane lands a few meters behind the catapult, 2nd attempt with a slightly sharper angle but especially a little more throttle was successful,

The nose really wants to go down, I suspect that cog is too far forward.
I will change that before the next flight
and change the pid a bit, it reacted really slowly when in Angle mode.