FLYING BACKWARDS?! T-Motor 4D

FLYING BACKWARDS?! T-Motor 4D

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#4D #TMotor #PickeringRC

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Vollständiger Text aus dem Video: FLYING BACKWARDS?! T-Motor 4D
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some time ago i already tried building and flying some 4d models it was a lot of fun as well as a new challenge the problem though for me was that the entire 4d system was rather complex at least as far as the number of moving parts were concerned all of which had to be perfectly set up balanced and slot free otherwise you just had a vibrating jiggling self-destroying mess how those systems work is basically the same principle as helicopter blades where the motor spins at more or less a fixed speed and a servo changes the pitch on the blades in one direction or the other in order to change between forwards and backwards flight when done properly the results can be amazing just check out these examples from my good friends marcus rummer on a giant scale but high up or andres leone on a pretty big scale but now after years of research and development getting nice and low with a very reliable system in my case though i just wanted something small that i could chuck in the back of the car go fly and have some fun with it all without needing loads of maintenance and a load of delicate parts that’s why when i saw that t-motor had brought out their own 4d combo using an entirely different solution i had to give it a go so as opposed to changing the propellers pitch they’re changing the motor’s rotation first off we have the motor with a regular configuration as opposed to the more expensive traditional 4d hollow shaft used for many variable pitch propeller systems next up we have the really clever part the 3d and 4d speed controller basically by pressing this button you can switch between the speed controller spinning the motor in just one direction or in both directions and now here’s the bit that i was most intrigued about the propellers of course normal propellers have an aerofoil design which makes them efficient at varying speeds but they don’t work well going backwards instead these props have a much flatter profile much closer to being a mirror image of itself in both directions when intending to use the 4d system to keep up with all of that quick reversing that this thing is going to be doing we also need this little adapter kit which replaces the standard o-ring for a nut based prop shaft looking at all the components we can see how much more straightforward this setup is compared to the variable pitch propellers so let’s get it all mounted into my rc factory crack yak and let’s give it a go to make this even more fun i don’t want just forwards and backwards flight i want the motor to be vector as well so turning left and right which gives us a whole new kind of flight envelope so rather than just mounting the motor straight onto the front of the model we have a small carbon plate with two ball links at top and bottom and that’s going to be the fixing point to the model and that can then twist and turn allowing the rudder servo to turn both the rudder and the motor making this a lot of fun mounting is through just a couple of holes into which we’re going to glue the ball links which hold the vector system once that’s done we’re going to connect it up to the existing rudder servo so it controls both rudder and vector at once to assure that the prop hub goes on perfectly straight tighten up the grub screws little by little until fully tight um me one thing though when it starts going wrong throttle forwards up elevator and it’ll soon fly out don’t try going backwards doesn’t work there you go a little bit of 4d with a really simple model and without all those complex moving parts at least for the forwards and backwards side of things now it is going to take a little while getting used to this new style of flying i personally haven’t flown it for a long time and even though i do start to feel like i’m getting back into it it’s not just pick it up and manage to hover right in front of you upside down so let’s have a quick look at the radio first and then we’ll pop into my own little tips and tricks which i’ve remembered along the way first of all we need to understand the kind of setup that we want to do in the radio itself the speed controller of course has that button which allows it to go from 3d to so just forwards to 4d so that’s forwards and backwards depending on whether you’re on the positive or negative side of zero now as we’re using computer radios personally i would always install the speed controller and have it set up for 4d if you only want to fly 3d well limit the travel on the speed controller and control it as 3d and then at the flickr switch you can activate the full range of motion which will then include 4d as well just bear in mind that 4d means that when you have your throttle stick at minimum the plane will go backwards very quickly so you want to have a safety switch a cutoff personally i have that here so when that’s down the engine will never come on i actually have on the screen here two positions one of them as you can see is the actual speed controller the signals it was receiving and then just for reference where the throttle is so even though i can actually move the throttle on there you can see that no matter what i’m doing with the throttle because my ignition kill switch is on basically the speed controller has the instruction to stay at zero so no movement no prop spinning however as soon as i flick my cut off then the speed controller does start receiving its signal so from zero up to a hundred so that would be standard normal 3d flight and then on a separate switch i have that option to increase the travel so now from the zero backwards to minus 100 so from the center down it’s going to be flying backwards and then from the center forwards it’s going to be flying forwards so 0 to plus 100 for forwards and 0 to minus 100 for backwards at least on my radio and then at any time if things start going wrong flip the switch motor turns off and at least everything stops spinning and it’s not going to go piling into the ground or into you or a wall that’s the radio sorted so what about the actual flying well there are a couple of really good tips and tricks for 4d flying the first of which is the center of gravity unlike conventional 3d foamies that are quite happy having the cg way back for 4d you need the cg a little bit further forwards as we found out with our fun jet and 3d jets who also appreciate that slightly more nose heavy cg the reason for this is simple because when you’re doing an inverted hover that extra nose weight helps it balance and it prevents it from spinning out quite as quickly now personally i could bring the cg further forward and that would help provide a much more stable inverted hover however it would be to the detriment to other parts of normal 3d flying so i’m quite happy where it is now but i will be trying a few more things so stay tuned for that the second trick is make sure to balance the aircraft really well now what i mean by that is this thing’s going to be flying upside down with no airflow over the surfaces so the more balanced it is to start with the better it’s going to fly especially in those downwards hovers so if you have to put your battery in a different place than normal now i put it on the top here where normally it goes underneath if you have to bring it up higher or lower don’t be afraid to do so as the better balanced it is on its own like that well the easier it’s going to be to do a lot of those 4d maneuvers and then the final really good trick is make sure to get a load of props i’ve broken a couple chances are you’re going to as well but the whole thing is holding up nicely so don’t be worried and just go out there and have some fun anyway i hope you enjoyed this video if you did leave us a like subscribe to the channel if you aren’t already and i’ll see you all in the next one
Für den Inhalt des Videos ist der VideoCreator: Martin Pickering verantwortlich.
#FLYING #TMotor
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