Houndpup Rc
Legendary member
Cool! Hope it flies good for you!
Let's Try This Again! 3D Printed EDF Jet Trainer
- Thread starter telnar1236
- Start date
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- Tags
- 3d print 50mm 50mm edf jet abs edf jet jet trainer
FlyerInStyle
Master member
If you do that, sign me up for beta building the Saab!
telnar1236
Elite member
Flew the v2 plane today and it's a huge improvement. Unfortunately, no video as I forgot my RunCam and it was sunny enough that it was very difficult to see phone screens well enough to film. Most likely I'll try and get some video after work sometime this week.
I got in six flights on it today - 3 on 1550 mAh 4s packs and 3 on 2200 mAh 4s packs. It's still a bit nose heavy with the 2200 but nothing difficult to handle and it can be trimmed out without much trouble, and it balances perfectly on the 1550. Flight times are 3:30 time on throttle with the 1550 mAh pack and 4:00 with the 2200 mAh including a mix of aerobatics and cruising. In terms of top speed, it's not a rocket ship but it's pretty quick - probably 60-70mph, and it slows down decently well for landing. Basic aerobatics are pretty easy - it doesn't have a 1:1 TWR but it holds onto energy well enough for loops to be simple to perform, and rolls are very axial. It can't really high alpha, but it does not tip stall at all, so it just sort of mushes around at about 10-15 degrees AOA with the elevator pinned back then drops the nose when you cut power. Overall, I'm pretty happy with it - it's not as easy to fly as some foam board jets but it's not particularly difficult to fly either, and it's very easy to replicate which makes it good for people less inclined towards building.
I got in six flights on it today - 3 on 1550 mAh 4s packs and 3 on 2200 mAh 4s packs. It's still a bit nose heavy with the 2200 but nothing difficult to handle and it can be trimmed out without much trouble, and it balances perfectly on the 1550. Flight times are 3:30 time on throttle with the 1550 mAh pack and 4:00 with the 2200 mAh including a mix of aerobatics and cruising. In terms of top speed, it's not a rocket ship but it's pretty quick - probably 60-70mph, and it slows down decently well for landing. Basic aerobatics are pretty easy - it doesn't have a 1:1 TWR but it holds onto energy well enough for loops to be simple to perform, and rolls are very axial. It can't really high alpha, but it does not tip stall at all, so it just sort of mushes around at about 10-15 degrees AOA with the elevator pinned back then drops the nose when you cut power. Overall, I'm pretty happy with it - it's not as easy to fly as some foam board jets but it's not particularly difficult to fly either, and it's very easy to replicate which makes it good for people less inclined towards building.
telnar1236
Elite member
The weather has unfortunately been pretty bad every evening this week so far, either raining or 20 mph wind, which means I haven't had the chance to fly it again and get more video. I'm hoping for tomorrow though. The silver lining to this is that it's given me time to upgrade all the parts to the version that will be in the final released files and get the colors to match. The biggest changes are that there are now inlets to cool the battery in the nose and the latch for the hatch is now 3D printed instead of improvised from a barbeque skewer. The canopy is also two pieces instead of 1 to make it easier to print.
telnar1236
Elite member
Finally got a bit more video of the plane, this time with a hand launch. It handles hand launches relatively well, although it sinks a bit after the initial toss.
Mr Man
Mr SPEED!
Looks good!
tomlogan1
Elite member
Sign me up as a beta tester. For those who 3d print here's a freebie: https://www.thingiverse.com/thing:6946673
My 3d printed version:
My 3d printed version:
Attachments
ColoFlyer
Active member
Do you think this will be able to be printed in LW-PLA.
Colorfab has the LW-PLA-HT that is available on Amazon, is heat resistant, and would solve the sun warping problem and create a much lighter and easier to fly air frame.
I have been using it on my 3D printed planes and have not seen any sun warping problems that I had with regular PLA+, and it is pretty easy to print with.
telnar1236
Elite member
I haven't played around with this material in particular, but I doubt it would be strong enough. This plane doesn't really even have wing spars and in most places the one-layer thick skin provides the majority of the strength. I also suspect it wouldn't really play very nicely with the modular system this plane uses. It can be split at each of these locations, just by undoing screws, and with the lower rigidity and compressive strength of LW PLA, I suspect it wouldn't really work and each of the screws would need some kind of dedicated PLA washer or insert to provide the support for it.
That said, I don't think that the higher weight is a particular problem when it comes to jets. This plane is fully aerobatic and can be hand launched without much difficulty. In a lot of cases I think the higher wing loading also helps with stability as a whole.
telnar1236
Elite member
STL files should be coming sometime soon. Some of the parts are currently a bit big for most printers and I also want to move the wing another half-inch further forwards to help with CG a bit on larger packs since currently it needs the pack to hang partially of the back of the battery tray.
Houndpup Rc
Legendary member
I wonder how good of a printer I would need for this......
ColoFlyer
Active member
Once the STL's come out, I may try printing it in LW-PLA-HT, just to see how it works out and compare the weight. Might be an interesting experiment.
ColoFlyer
Active member
I was actually thinking of printing either the Firebird v2 or the Stormbird, just trying to decide which of these single motor wings would be the easiest to fly.
Are these your designs?
telnar1236
Elite member
Something like an Ender 3 should be plenty. I've tried to keep the size of each part within that footprint wherever possible in all my designs except for my F-106 and it's normal PLA, or for best performance ABS or ASA, so it's not all that bad to print. My little speed jet that I didn't quite get working in time for the competition should be able to be printed on a much smaller printer though, when and if I ever get it flying.
telnar1236
Elite member
Would be interesting to see how that turns out, for sure. You might be able to play with the slicer settings or use a larger nozzle and get something workableOnce the STL's come out, I may try printing it in LW-PLA-HT, just to see how it works out and compare the weight. Might be an interesting experiment.
Houndpup Rc
Legendary member
I have 25 rolls of PLA that I got on HK's big warehouse sale..(10c a roll!) But I can't get rid of it and I don't have a 3D printer! 😂 😂 😂
Houndpup Rc
Legendary member
Oooohh.....I have 3mm......
