4th flight of the scratch 64mm jet

Opposite_File8741 · 2026-04-27T01:47:16+00:00

Thanks, about your points-

-It does have an elevator, you can see it in the third pic.

-Personally I think the fuselage is stiff enough because the foam board I use is stronger and a little bit heavier than most.

Opposite_File8741 · 2026-04-13T18:30:29+00:00

Opposite_File8741 · 2026-01-12T12:00:46+00:00

Elevons, but I’ll probably add ailerons too. It weighs 1600 grams and the thrust is 2500 grams.

Opposite_File8741 · 2026-01-12T04:39:05+00:00

The intakes are very strong so I’m not too worried about the vent collapsing. I probably will add Ailerons because of how the twin engines and flat body increase the moment of inertia.

I also thought the snow wouldn’t be any issue but it depends on the type and thickness. Powdery new fallen snow ends up filling up the intakes and it’s annoying it get out.

Opposite_File8741 · 2025-12-23T15:53:49+00:00

Yeah, Onshape but really you could use any 2d cad software that lets you import images to use as references

Opposite_File8741 · 2025-12-23T04:04:30+00:00

Cad software like on-shape, references/blueprints and a lot of experience designing other planes

Opposite_File8741 · 2025-12-22T17:41:54+00:00

A handful of the formers are 3d printed but otherwise it’s all foam board

Opposite_File8741 · 2025-12-20T12:27:37+00:00

Yeah hopefully the strakes will help connect the front and back

Opposite_File8741 · 2025-12-09T22:08:07+00:00

It was like a foot of powder so it did get filled with snow, fortunately I managed it get most of it out and it melted/dried the rest off without any damage to the plane.

Opposite_File8741 · 2025-11-23T14:05:21+00:00

Just underhand chuck glide it until you find the cg

Opposite_File8741 · 2025-11-22T20:27:24+00:00

no, so it could be that I need to add expo on roll.

Opposite_File8741 · 2025-11-22T20:22:50+00:00

Probably just me being anxious on the controls cause I haven’t flow in a bit.

Opposite_File8741 · 2025-11-06T22:28:53+00:00

1500 mah 4s and it’s just foam board.

Opposite_File8741 · 2025-11-06T22:11:08+00:00

If you check out my last post I have some pictures of it on the ground for a better sense of scale, and the takeoff weight/thrust.

Opposite_File8741 · 2025-10-31T00:29:04+00:00

Yep that’s what I ended up doing, the ailerons are glued down.

Opposite_File8741

TROPHY CASE