tsungxu

5 ms·

1. 1.▲
   by tsungxu 3mo ago

   I do agree that trains and then streetcars created suburban corridors, but suburbia as we know it today became possible with highways and mainstream car adoption post WW2, at least in the US. Ultimately the early generations of flying cars
2. 2.▲
   by tsungxu 3mo ago

   The two first order reasons (certification overhead on engineering and low volumes) as to why personal aircraft are so expensive can finally be addressed. https://www.tsungxu.com/i/202017969/the-small-aircraft-cost
3. 3.▲
   Flying Cars Expand the Area of Daily Life Quadratically with Speed(tsungxu.com)

   4 points by tsungxu 3mo ago|6 comments
4. 4.▲
   by tsungxu 3mo ago

   Walking made 2-mile villages feel local. Cars made 20-mile cities feel local. Flying cars will make 200-mile regions feel local.
5. 5.▲
   Flying cars are finally arriving(notboring.co)

   2 points by tsungxu 3mo ago|0 comments
6. 6.▲
   by tsungxu 1y ago

   Yeah it's a strange term because it probably originated relative to fixed wing planes. Ie a VTOL plane. But now multicopters are the predominant species so VTOL can sound redundant to most drone builders today.
7. 7.▲
   by tsungxu 1y ago

   Thanks, really appreciate that
8. 8.▲
   by tsungxu 1y ago

   Thanks! Not robust exactly because the filament I used is has really poor impact and UV resistance. But that's the tradeoff with lightweighting
9. 9.▲
   by tsungxu 1y ago

   Yes, you're right, I meant ACCST not SBUS
10. 10.▲
    by tsungxu 1y ago

    Thanks! On the normal jobs point though, see Peter Ryseck's build which got him hired by Joby https://www.youtube.com/watch?v=Dd2N_lyO_SQ
11. 11.▲
    by tsungxu 1y ago

    This is neat! It seems like it could help with set up speed generally and also simplicity for beginners
12. 12.▲
    by tsungxu 1y ago

    Aesthetics follows function in this case. And agreed VTOL is not beneficial at hobbyist scale for most because of the ease and short distances required to hand/runway launch and land an RC plane
13. 13.▲
    by tsungxu 1y ago

    Great question, but spinning lifting motors in cruise draws more power than it's worth for efficiency. There's ways to use differential thrust for multiple cruise motors to roll if not positioned at spanwise Cg (e.g. wing mounted
14. 14.▲
    by tsungxu 1y ago

    I actually managed to batch print the wing sections which you can see in the video in the rebuild chapter. That works really well for wing sections because each takes up a minimal bed area
15. 15.▲
    by tsungxu 1y ago

    I saw that one too which was also incredible. This latest record was from a few days ago https://youtu.be/8p5eZ4ZRkfY?si=hSxTh5BeSyEwzpy8
16. 16.▲
    by tsungxu 1y ago

    A1, 256 x 256 mm lets me print these wings in four sections (including a double walled thin section for the boom mounts). With a high AR glider you'd probably need a few more. Carbon fiber spars + CA glue will do the trick for attachin
17. 17.▲
    by tsungxu 1y ago

    Thank you, appreciate that!
18. 18.▲
    by tsungxu 1y ago

    Yes and there is foaming ASA as well which is almost as light as foaming PLA. But I can't print ASA well on my A1 and the weight penalty was still enough that I didn't try, given the mission profile of flight time.
19. 19.▲
    by tsungxu 1y ago

    This actually has decent flight time! Could probably push close to 3 hours if using higher energy density (and cost) battery cells like the silicon anode ones I used.
20. 20.▲
    by tsungxu 1y ago

    I used single wall foaming PLA which has filament density of ~0.45 g/cm3 at 250 degree nozzle temp, about 64% lower than normal PLA. But it is even worse for impact resistance than normal PLA. Weight was the primary driver for this pla
21. 21.▲
    by tsungxu 1y ago

    Thank you!
22. 22.▲
    by tsungxu 1y ago

    Yes it really depends on the transmitter protocol. I was using SBUS, simple, cheap, familiar from my previous project. But limited to < 1 mile or so I believe, but ELRS and other protocols allow tens of miles or more.
23. 23.▲
    by tsungxu 1y ago

    Yes, one of the challenges though is airframe structural integrity when building it yourself. Need to have good enough understanding of multicopter and fixed wing plane design
24. 24.▲
    by tsungxu 1y ago

    Thanks! I'm using the standard Ardupilot control systems for hover, transition and cruise flight. On the firmware side, it's just some parameters and tuning that is customized. What I started with - Had built one VTOL before from
25. 25.▲
    by tsungxu 1y ago

    Thanks and yes I'm glad you say that. Would love to see it. It's hard to convey how much faster and better your work will be if you are actually passionate about it.
26. 26.▲
    by tsungxu 1y ago

    Great question! I don't think there's any sub $5k VTOL you can just buy COTS that can get close to 3 hours of range. Also, nothing is as plug and play as DJI. If you're motivated enough to do a little DIY and learn how to use
27. 27.▲
    by tsungxu 1y ago

    Thank you!
28. 28.▲
    by tsungxu 1y ago

    It's great, check out the Slo Mo guys video from that same tour for the prop smoke vortex https://www.youtube.com/watch?v=5yaAFLpLmVg
29. 29.▲
    by tsungxu 1y ago

    You should do it!
30. 30.▲
    by tsungxu 1y ago

    Exactly! Didn't even mention cruise vs dive. But the latest WR for a quad doing 347mph I think, is just insane, even if drawing multi hundred amps for a few seconds only.