skymaster
Elite member
Sorry but i think they already beat you to it.
ZMO Digital FPV Fixed Wing with Vertical Takeoff and Landing (VTOL) - YouTube
Sorry but i think they already beat you to it.
no, that can 'nose up' and hover and do vertical take of and landing (that is what you were trying to to get yes? your going to need a FC for any hovering mode anyways. and if the primary goal of the hover is just to make take off and landing take less space, that should get you what you need).Like, a normal plane? I have lots of those lol
Yeah, I've seen that one. Its pretty cool!Sorry but i think they already beat you to it.
ZMO Digital FPV Fixed Wing with Vertical Takeoff and Landing (VTOL) - YouTube
no, that can 'nose up' and hover and do vertical take of and landing
FC for any hovering mode anyways. and if the primary goal of the hover is just to make take off and landing take less space, that should get you what you need
ok, carry on then and have fun. I missed that detail in the thread.this one is just fun from the, "can it be done" side of engineering.
Haha, yeah, I'm just posting for some theoritical aviation engineering debate, not so so much in search of a mechanical solition. 😁ok, carry on then and have fun. I missed that detail in the thread.
The question is, "Can an FC be programmed to control a trimotor aircraft if forced to use only the rudder for yaw." And i think the answer is, above 5kts fwd airspeed, absolutely. Now, would it be able to perform a static hover for more than a few seconds? I have my doubts. Would it be stable long enough to gently land? I believe so.
Thats an idea, and thanks for the input, but I was more wanting to just focus on the physics at play rather than to build a craft with propper yaw control.To offer a solution, you could...
An out-of-yaw-control vtol that's yawing in circles will still be stabilized in the roll and pitch axis in stabilized/angle controller modes..........................2-3 times per second.
It would be easier to determine by trial and error with a variable length boom you mount the forward or rear motor on.
Will it fly? Yes absolutely. Will it be controllable in hover and and fun to fly? You be the judge and report back
I loved your do29 btw, can't wait to see the water version in action!I tried that. It worked really good Im just a bad pilot. I was about to say the motors on flaps would make transitions smooth. I think youd need a canard prop out front, and if it was on that swivel that Litterbug linked youd have it made. Or blowing the wrong way and on the tail.
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Current version is a boat. Im working up the courage to attempt 20 landings with it for the bush challenge.
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Like, a normal plane? I have lots of those lol
lol, nope!You ain't got THIS one!
While I love seeing cool designs and talking about them it seems we're kind of straying from the original topic.
The question is, "Can an FC be programmed to control a trimotor aircraft if forced to use only the rudder for yaw." And i think the answer is, above 5kts fwd airspeed, absolutely. Now, would it be able to perform a static hover for mpre than a few seconds? I have my doubts. Would it be stable long enough to gently land? I believe so.
Rather than building an entirely different airframe i can simply put a L/R tilt servo on the rear motor and it would like just like several other proven tricopter designs ive seen. If it proves to be too unstable that is likely the route i would go.
Seeing that one gives me some confidence that this might actually work. He did a very good job considering how touchy a tilt rotor like that is about CG and the fact that he was able to get to transition with just a few lines of code, and on the maiden no less. 👏 hats off to him. Im cheating by comparison as i plan to use a good FC and run adrupilot so all the code has been done by people far better at that than myself.
Ive been using mission planner for a while and the painless360 channels videos were a great help. I'm happy to see that Hes doing a VTOL series now.
Obviously when i get to the point I'm putting expensive equipment in it I will have proper yaw control. I plan to apply this thought experiment to the initial test build as I'm going to try to keep it in the sub 250 range, so fewer moving parts would be a great help.
I'll do a build thread on this project when i get to it later this summer.
He has a better and later version of a plane where VTOL that can even handle the (cross)winds.
But if your goal is to keep it below 250, good luck.
I would suggest before you try, practice the FC tuning so you know what how and what to do before, otherwise you will learn by crashes. If you do the printing approach, get your tolerances close for the gearing arrangements. Weight is going to be your problem.