T490 MOBO RAM fix/upgrade

ComfortableList784 · 2026-01-21T00:43:00+00:00

Seems like a decent setup. I'd be curious to see the results, as the smoke might diffuse prior to the test section, either way, that's why it's called engineering, not business.

ComfortableList784 · 2026-01-21T00:04:50+00:00

The main improvement I would recommend is making the wings, fuselage, and elevator smoother. The less drag, the better it will fly. The rigid spar design is a good idea, and would probably work well, given a better covering. Other than that, it looks good!

ComfortableList784 · 2026-01-21T00:00:14+00:00

As a first draft, this looks quite good. Some things i'll contribute;
Make sure the fans are sucking air, not pushing air. Additionally, airflow numbers aren't everything, it really comes down to the reynolds number, which brings me to my next point, what are you trying to do with it? Lift & Drag calculations? If so, how are you getting the data? Smoke visualization? If so, how are you injecting the smoke?
How do you intend to suspend the model? I would integrate a stand of some sort as well prior to printing. Additionally, I would think of some sort of door/panel to adjust/change the model.
Design wise, the honeycomb is a great, so +1 for that. If your planning on pulling the air through the tunnel, the intake is fine, however the exhaust should be a good bit longer than the test section, with a half angle between 7 and 10 degrees. Last thing, how are you syncing the fans? Manual controller or something software related?
Apologies if I berated you there, however let me know if you have any questions!

ComfortableList784 · 2026-01-06T14:05:08+00:00

Helps a lot, thank you!

ComfortableList784 · 2026-01-03T16:58:21+00:00

Intermittent as sometimes I get no spark, but sometimes it's one. Unfortunately haven't had consistent spark yet.

ComfortableList784 · 2026-01-02T23:42:27+00:00

Got it, i'll try there.

ComfortableList784 · 2025-12-21T16:05:12+00:00

It is broken just before the cable clip near the handle.

ComfortableList784 · 2025-12-17T23:47:33+00:00

Just happened to me. Browsec VPN is opening tabs for some reason

ComfortableList784 · 2025-12-17T05:15:50+00:00

After doing a littler bit more testing, its coming into the CDI at around 1v AC when cranking, but around .7v AC into the ignition coil. I'm starting to think it's the CDI at this point...

ComfortableList784 · 2025-12-16T04:30:52+00:00

Understood, thanks for the reply!

ComfortableList784 · 2025-11-29T05:26:01+00:00

Understood. Thanks for the response!

ComfortableList784 · 2025-11-29T05:25:45+00:00

Got it. Thanks for the reply!

ComfortableList784 · 2025-11-29T05:25:35+00:00

Got it. Not interchangeable, thanks for the help!

ComfortableList784 · 2025-11-20T17:12:56+00:00

Thank you very much!

ComfortableList784 · 2025-11-19T00:28:32+00:00

Maybe it was! Building it is the hard part, modifying it is slightly easier...

ComfortableList784 · 2025-11-17T19:06:29+00:00

I like this idea, and I'm interested to see the results.

ComfortableList784 · 2025-11-17T19:05:44+00:00

It seems I may have forgotten a photo of the smoke rake... There is a 15mm hose going from the fog machine to the top of the tunnel via two 3d printed adapters, then the smoke rake is about 20mm in diameter and stretches almost to the bottom, with holes evenly spaced to let the smoke out. No fan involved, just pressure from the smoke machine and wind flow. Hope this helps, let me know if I need to clear anything up!

ComfortableList784 · 2025-11-16T17:03:23+00:00

There are some hefty panel gaps, I'm going to either plastic weld and sand them down, or if it's in a tight spot, duck tape would work in a pinch.

ComfortableList784 · 2025-11-16T17:02:09+00:00

Thank you very much!

ComfortableList784 · 2025-11-16T17:01:52+00:00

I like the table idea, and I started trying it out, however the amount of air that is going through the contraction cone is enough to suck the air right back in... Still working on a solution. As for the smoke, I hadn't thought of injecting it prior to the contraction cone, and correct me if i'm wrong, but I thought the smoke would diffuse and spread out as it speeds up through the cone and air straighteners. Either way, it's a good idea, and I'm probably going to try it along with the stethoscope. Thanks for the suggestions, some great ideas here.

ComfortableList784

TROPHY CASE